As filed with the U.S. Securities and Exchange Commission on October 2, 2026

Registration No. 333-297628

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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FORM S-4/A

Amendment No. 1

REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

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AIR INDUSTRIES GROUP

(Exact name of registrant as specified in its charter)

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1460 Fifth Avenue
Bay Shore, New York 11706
(631) 968-5000
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

________________________________________________

Scott Glassman

Acting Chief Executive Officer and President

Air Industries Group

1460 Fifth Avenue

Bay Shore, New York 11706

(631) 968-5000
(Name, address, including zip code, and telephone number, including area code, of agent for service)

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With Copies to:

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Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this registration statement is declared effective and upon completion of the transactions described in the enclosed information statement/prospectus.

If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the “Securities Act”), check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information contained in this proxy statement/prospectus is not complete and may be changed. These securities may not be issued until the registration statement filed with the U.S. Securities and Exchange Commission becomes effective. This proxy statement/prospectus is not an offer to sell these securities and does not constitute the solicitation of an offer to buy these securities in any jurisdiction where the offer or sale of these securities is not permitted.

PRELIMINARY — SUBJECT TO COMPLETION

DATED OCTOBER 2, 2026

LETTER FROM THE CHAIRMAN OF THE BOARD
AND
THE ACTING CHIEF EXECUTIVE OFFICER

YOUR VOTE IS VERY IMPORTANT

[•], 2026

To the stockholders of Air Industries Group:

We are pleased to invite you to attend a special meeting of stockholders of Air Industries Group, a Nevada corporation, referred to as AIR, to be held on [•], 2026, at [•] [A.M./P.M.], Eastern Time. The special meeting will be held in person at 1460 Fifth Avenue, Bay Shore, New York 11706. Stockholders attending in person may vote by ballot at the meeting. Stockholders not attending the special meeting in person may cast their vote by submitting proxies by Internet, by telephone or by mail according to the instructions provided in this proxy statement/prospectus.

As previously announced, AIR, Tenax Aerospace Acquisition, LLC, a Delaware limited liability company, referred to as Tenax, and Transitory Air Sub LLC, a Delaware limited liability company and a wholly owned subsidiary of AIR, referred to as Merger Sub, have entered into an Amended and Restated Agreement and Plan of Merger, dated as of July 2, 2026 (as amended by the Amendment to the Amended and Restated Agreement and Plan of Merger, dated as of July 31, 2026), referred to as the merger agreement. The merger agreement amended and restated that certain Agreement and Plan of Merger, dated as of February 16, 2026, by and among Tenax, AIR and Merger Sub (as amended by the Amendment to the Agreement and Plan of Merger, dated as of June 8, 2026), referred to as the original merger agreement. Pursuant to the terms of the merger agreement, Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR.

Tenax is an aerospace and defense supplier providing special mission aircraft and related aviation equipment and services to the U.S. and Canadian governments and other customers, focusing on enduring special mission aviation programs critical to national security and the public interest, including aerial firefighting, airborne ISR, airborne engagement simulation and airborne sensor testing and training.

At the effective time of the merger, AIR will issue or reserve for issuance, as applicable, 126,900,000 shares (which number will be adjusted to 25,380,000 shares after giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split of AIR’s common stock, each as described in this proxy statement/prospectus) of its common stock, par value $0.001 per share, referred to as AIR common stock, to the holders of membership interests of Tenax, referred to as the Tenax Members, and the holders of warrants of Tenax, referred to as the Tenax Warrantholders, as merger consideration. The portion of the merger consideration allocable to the Tenax Members will be issued at the effective time, and the portion of the merger consideration allocable to the Tenax Warrantholders will be reserved for issuance upon the exercise of their warrants, as further described herein.

AIR will survive following the merger and will remain a publicly traded corporation listed on the NYSE American under the symbol “AIRI”, referred to as the combined company. As a result of the merger, holders of our common stock as of immediately prior to the effective time are expected to collectively own approximately 4% of the outstanding shares of the common stock of the combined company, on a fully diluted basis, and the Tenax Members and Tenax Warrantholders as of immediately prior to the effective time are expected to collectively own approximately 96% of the outstanding shares of the common stock of the combined company, on a fully diluted basis. Thomas Foley will own, directly or indirectly, approximately 52% of the fully diluted shares of AIR common stock. As a result, AIR will be a “controlled company” for purposes of Section 801(a) of the NYSE American Company Guide and will be exempt from certain governance requirements otherwise required by the NYSE American. See the section entitled “The Merger — Governance of AIR Following the Merger — Controlled Company” beginning on page 64 of this proxy statement/prospectus.

In connection with the merger, AIR’s articles of incorporation will be amended to (a) increase the number of authorized shares of AIR common stock from 20,000,000 to 200,000,000 and (b) authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock, in each case as conditions to the closing of the merger.

At the special meeting, you will be asked to vote on:

1.      a proposal to approve the issuance of AIR common stock as merger consideration pursuant to the terms of the merger agreement, in compliance with Section 713(b) of the NYSE American Company Guide, resulting in a change of control of AIR, referred to as the stock issuance proposal;

2.      a proposal to amend the articles of incorporation of AIR to increase the number of authorized shares of AIR common stock from 20,000,000 to 200,000,000, referred to as the authorized shares proposal;

3.      a proposal to amend the articles of incorporation of AIR to authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock, referred to as the written consent proposal;

4.      a proposal to approve an advisory resolution regarding the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger, referred to as the transaction compensation proposal; and

5.      a proposal to adjourn the special meeting, if necessary or appropriate, including to solicit additional proxies, in the event that there are not sufficient votes at the time of the special meeting to approve items 1, 2 or 3 above, referred to as the adjournment proposal.

We are not asking our stockholders to approve the merger agreement or the merger.

Approval of the stock issuance proposal requires, in accordance with Section 713(b) of the NYSE American Company Guide, that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the authorized shares proposal requires, pursuant to Section 1.8.1 of AIR’s bylaws and NRS 78.390(1)(a)(1), that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. Under Section 1.8.1 of AIR’s bylaws, “votes cast” means all votes cast in favor of and against the proposal and does not include abstentions or broker non-votes. Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the written consent proposal requires, pursuant to NRS 78.390(1)(a)(2), the affirmative vote of the holders of shares representing at least a majority of the voting power of the outstanding shares of AIR common stock entitled to vote thereon as of the record date for the special meeting. A failure to vote, a broker non-vote or an abstention will each have the same effect as a vote “AGAINST” this proposal.

Approval of the transaction compensation proposal is a non-binding, advisory vote. Stockholders are being asked to indicate their approval of the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger. Because this vote is advisory and non-binding, it will not be determinative of whether such compensation is paid. The vote will be approved if the votes cast “FOR” exceed the votes cast “AGAINST.” Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the adjournment proposal requires that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. The approval of the adjournment proposal is not a condition to the consummation of the merger. Abstentions and broker non-votes will have no effect on the outcome of this vote.

The completion of the merger is conditioned on approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal. Your vote is very important, regardless of the number of shares you own. Whether or not you plan to attend the special meeting, we hope you will vote as soon as possible.

Our board of directors has unanimously (a) determined that the merger agreement and the transactions contemplated thereby are fair to and in the best interests of AIR and its stockholders, (b) adopted and approved the merger agreement and the transactions contemplated by the merger agreement and (c) resolved to recommend that the stockholders of AIR approve the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal. ACCORDINGLY, OUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS VOTE “FOR” THE STOCK

ISSUANCE PROPOSAL, “FOR” THE AUTHORIZED SHARES PROPOSAL, “FOR” THE WRITTEN CONSENT PROPOSAL, “FOR” THE TRANSACTION COMPENSATION PROPOSAL AND “FOR” THE ADJOURNMENT PROPOSAL.

Our obligations to complete the merger are subject to the satisfaction or waiver of several conditions set forth in the merger agreement, a copy of which is included herein as Annex A. The proxy statement/prospectus provides you with detailed information about the proposed merger, the merger agreement and the transactions contemplated thereby. It also contains or references information about us and Tenax and certain related matters. You are encouraged to read this document carefully. In particular, you should read the “Risk Factors” section beginning on page 16 for a discussion of the risks you should consider in evaluating the proposed merger and how it will affect you. If you have any questions regarding this proxy statement/prospectus, you may contact Advantage Proxy, our proxy solicitor, by calling toll-free at (877) 870-8565. Banks, brokerage firms and other nominees may call collect at (206) 870-8565.

Thank you for your ongoing support of AIR. We look forward to the successful completion of the merger.

Sincerely,

Peter D. Rettaliata
Chair of the Board

Scott Glassman
Acting Chief Executive Officer and President

Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved of the merger, or the other transactions contemplated by the merger agreement, or determined that this proxy statement/prospectus is accurate or complete. Any representation to the contrary is a criminal offense.

This document is dated [•], 2026 and is first being mailed to AIR stockholders on or about [•], 2026.

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

AIR INDUSTRIES GROUP

[•], 2026

Notice is hereby given that a special meeting of stockholders of Air Industries Group, a Nevada corporation, referred to as AIR, will be held on [•], 2026, at [•] [A.M./P.M.], Eastern Time, at 1460 Fifth Avenue, Bay Shore, New York 11706. Stockholders attending in person may vote by ballot at the meeting. Stockholders not attending the special meeting in person may cast their vote by submitting proxies by Internet, by telephone or by mail according to the instructions provided in this proxy statement/prospectus.

The special meeting is being held for the following purposes:

1.      to vote on a proposal to approve the issuance of AIR common stock as merger consideration pursuant to the Amended and Restated Agreement and Plan of Merger, dated as of July 2, 2026 (as amended by the Amendment to the Amended and Restated Agreement and Plan of Merger, dated as of July 31, 2026), referred to as the merger agreement, among AIR, Tenax Aerospace Acquisition, LLC, a Delaware limited liability company, referred to as Tenax, and Transitory Air Sub LLC, a Delaware limited liability company and a wholly owned subsidiary of AIR, referred to as Merger Sub, a copy of which is included as Annex A to the proxy statement/prospectus of which this notice forms a part, in compliance with Section 713(b) of the NYSE American Company Guide, resulting in a change of control of AIR, referred to as the stock issuance proposal.

2.      to vote on a proposal to amend the articles of incorporation of AIR to increase the number of authorized shares of AIR common stock from 20,000,000 to 200,000,000, referred to as the authorized shares proposal.

3.      to vote on a proposal to amend the articles of incorporation of AIR to authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock, referred to as the written consent proposal.

4.      to vote on a proposal to approve an advisory, non-binding resolution regarding the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger, referred to as the transaction compensation proposal.

5.       to vote on a proposal to adjourn the special meeting, if necessary or appropriate, including to solicit additional proxies, in the event that there are not sufficient votes at the time of the special meeting to approve items 1, 2 or 3 above, referred to as the adjournment proposal.

No other business will be transacted at the special meeting.

Your proxy is being solicited by our board of directors. Our board of directors has unanimously (a) determined that the merger agreement and the transactions contemplated thereby are fair to and in the best interests of AIR and its stockholders, (b) adopted and approved the merger agreement and transactions contemplated by the merger agreement and (c) resolved to recommend that the stockholders of AIR approve the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal. ACCORDINGLY, OUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS VOTE “FOR” THE STOCK ISSUANCE PROPOSAL, “FOR” THE AUTHORIZED SHARES PROPOSAL, “FOR” THE WRITTEN CONSENT PROPOSAL, “FOR” THE TRANSACTION COMPENSATION PROPOSAL AND “FOR” THE ADJOURNMENT PROPOSAL.

Our board of directors has fixed the close of business on [•], 2026, as the record date for the special meeting for determination of AIR stockholders entitled to receive notice of, and to vote at, the special meeting of AIR stockholders or any adjournments or postponements thereof. Only holders of record of our common stock at the close of business on the record date for the special meeting are entitled to receive notice of, and to vote at, the special meeting.

Approval of the stock issuance proposal requires, in accordance with Section 713(b) of the NYSE American Company Guide, that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the authorized shares proposal requires, pursuant to Section 1.8.1 of AIR’s bylaws and NRS 78.390(1)(a)(1), that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. Under Section 1.8.1 of AIR’s bylaws, “votes cast” means all votes cast in favor of and against the proposal and does not include abstentions or broker non-votes. Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the written consent proposal requires, pursuant to NRS 78.390(1)(a)(2), the affirmative vote of the holders of shares representing at least a majority of the voting power of the outstanding shares of AIR common stock entitled to vote thereon as of the record date for the special meeting. A failure to vote, a broker non-vote or an abstention will each have the same effect as a vote “AGAINST” this proposal.

Approval of the transaction compensation proposal is a non-binding, advisory vote. Stockholders are being asked to indicate their approval of the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger. Because this vote is advisory and non-binding, it will not be determinative of whether such compensation is paid. The vote will be approved if the votes cast “FOR” exceed the votes cast “AGAINST.” Abstentions and broker non-votes will have no effect on the outcome of this vote.

Approval of the adjournment proposal requires that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal. The approval of the adjournment proposal is not a condition to the consummation of the merger. Abstentions and broker non-votes will have no effect on the outcome of this vote.

A quorum for the special meeting consists of holders of at least 33⅓% of the outstanding shares of AIR common stock entitled to vote, present in person or represented by proxy.

We are not asking our stockholders to approve the merger agreement or the merger.

Your vote is very important. To ensure your representation at the special meeting of our stockholders, please complete and return the enclosed proxy card or submit your vote through the Internet or telephonically. Whether or not you plan to attend the meeting, we urge you to vote. Registered stockholders may vote (i) via the Internet, (ii) by telephone, (iii) by returning a properly executed proxy card or (iv) in person at the special meeting. If your shares are held in the name of a bank, broker or other nominee, follow the instructions you receive from your nominee on how to vote your shares. Registered stockholders who attend the meeting may vote their shares personally even if they previously have voted their shares.

You will need an admission ticket or proof of ownership of our common stock to enter the special meeting. If you hold shares directly in your name as a stockholder of record and have received a copy of our proxy materials, an admission ticket is attached to your printed proxy card. If you plan to attend the special meeting, please vote your proxy prior to the special meeting but keep the admission ticket and bring it with you to the special meeting.

If your shares are held beneficially in the name of a broker, trustee or other nominee and you wish to be admitted to the special meeting, you will have to bring either a copy of the voting instruction form provided by your broker, trustee or other nominee, or a copy of a brokerage statement showing your ownership of our common stock as of [•], 2026.

If you are representing an entity holding shares, then you must present a proxy signed by that entity evidencing that you are authorized to attend the special meeting and vote the shares or are otherwise representing the entity at the special meeting. If you are representing an entity whose shares are held beneficially in the name of a broker, trustee or other nominee, you will have to bring either a copy of the voting instruction form provided by such entity’s broker, trustee or other nominee, or a copy of a brokerage statement showing the entity’s ownership of our common stock as of [•], 2026, in addition to the proxy signed by the entity you are representing.

All stockholders must also present a form of photo identification, such as a valid driver’s license or passport, in order to be admitted to the special meeting.

If you have any questions regarding the accompanying proxy statement/prospectus, you may contact Advantage Proxy, our proxy solicitor, by calling toll-free at (877) 870-8565. Banks, brokerage firms and other nominees may call collect at (206) 870-8565.

Brian Drisgula
Secretary

This Notice of Special Meeting of Stockholders and proxy statement/prospectus and form of proxy are first being mailed to AIR stockholders on or about [•], 2026.

REFERENCES TO ADDITIONAL INFORMATION

This proxy statement/prospectus incorporates important business, financial and other information about AIR that is not included in or delivered with this document. You may obtain this information without charge through the website of the SEC (www.sec.gov) or upon your written or oral request by contacting Investor Relations at 1460 Fifth Avenue, Bay Shore, NY 11706, or by calling (631) 968-5000.

To ensure timely delivery, any request should be made no later than [•], 2026.

For additional details about where you can find information about AIR, please see the section entitled “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus.

ABOUT THIS PROXY STATEMENT/PROSPECTUS

This document, which forms part of the registration statement on Form S-4 filed with the SEC by AIR, constitutes a proxy statement of AIR under Section 14(a) of the Exchange Act. It also constitutes a notice of special meeting with respect to the special meeting at which AIR stockholders will be asked to consider and vote upon the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal.

On May 5, 2026, AIR filed a preliminary proxy statement with the SEC relating to the merger and containing certain of the information set forth in this proxy statement/prospectus. On July 2, 2026, AIR, Tenax and Merger Sub entered into the merger agreement, which amended and restated the original merger agreement to, among other things, require that AIR file a registration statement on Form S-4 with respect to the shares of AIR common stock to be issued to the Tenax Members as merger consideration. The purpose in including this requirement in the merger agreement was to facilitate the combined company’s satisfaction of the NYSE American listing requirement that the combined company have, as of the closing of the merger an aggregate market value of unrestricted publicly-held shares of at least $15 million. This proxy statement/prospectus sets forth additional information not contained in AIR’s previously filed preliminary proxy statement in order to reflect the terms of the amended and restated merger agreement and to satisfy the requirements of Form S-4.

Tenax has provided all information contained in this proxy statement/prospectus relating to Tenax, and AIR has supplied all information contained in or incorporated by reference into this proxy statement/prospectus relating to AIR and Merger Sub.

You should rely only on the information contained in or incorporated by reference into this proxy statement/prospectus. Tenax and AIR have not authorized anyone to provide you with information that is different from that contained in or incorporated by reference into this proxy statement/prospectus. This proxy statement/prospectus is dated [•], 2026, and you should not assume that the information contained in this proxy statement/prospectus is accurate as of any date other than such date. Further, you should not assume that the information incorporated by reference into this proxy statement/prospectus is accurate as of any date other than the date of the incorporated document.

DEFINITIONS

Unless otherwise indicated or as the context otherwise requires, a reference in this proxy statement/prospectus to:

•        “2025 Form 10-K” refers to AIR’s annual report on Form 10-K, filed with the SEC on March 27, 2026;

•        “Q1 Form 10-Q” refers to AIR’s quarterly report on Form 10-Q, filed with the SEC on May 13, 2026;

•        “Q2 Form 10-Q” refers to AIR’s quarterly report on Form 10-Q, filed with the SEC on August 12, 2026;

•        “adjournment proposal” refers to a proposal to adjourn the special meeting, if necessary or appropriate, including to solicit additional proxies, in the event that there are not sufficient votes at the time of the special meeting to approve the stock issuance proposal, the authorized shares proposal or the written consent proposal;

•        “AIR” or “we” or “our” or “the Company” refers to Air Industries Group, a Nevada corporation;

•        “AIR Board” refers to the board of directors of AIR;

•        “AIR common stock” refers to common stock of AIR, par value $0.001 per share;

•        “AIR RSU” refers to a restricted stock unit of AIR;

•        “AIR Stockholder Support Agreement” refers to the AIR Stockholder Support Agreement, dated as of February 16, 2026, among Tenax and certain AIR Stockholders party thereto;

•        “AIR stockholders” refers to holders of shares of AIR common stock;

•        “AIR stock options” refers to options to purchase shares of AIR common stock granted pursuant to the AIR Stock Plans or otherwise;

•        “AIR Stock Plans” refers to the AIR 2022 Equity Incentive Plan, the AIR 2017 Equity Incentive Plan, the AIR 2016 Equity Incentive Plan and the AIR 2015 Equity Incentive Plan, each as amended or amended and restated from time to time;

•        “Antitrust Laws” refers to the HSR Act and other applicable antitrust, competition or pre-merger notification laws of any jurisdiction;

•        “authorized shares proposal” refers to the proposal to amend the articles of incorporation of AIR to increase the number of authorized shares of AIR common stock from 20,000,000 to 200,000,000;

•        “business day” refers to any day on which banks are not required or authorized to close in the City of New York;

•        “closing” refers to the closing of the merger;

•        “closing date” refers to the closing date of the merger;

•        “Code” refers to the Internal Revenue Code of 1986;

•        “combined company” refers to AIR following the consummation of the merger;

•        “Debt Adjusted AIR Share Price” refers to $3.05, subject to adjustment in accordance with the merger agreement ($15.25 after giving effect to the reverse stock split);

•        “DLLCA” refers to the Limited Liability Company Act of the State of Delaware;

•        “DOJ” refers to the U.S. Department of Justice;

•        “EBITDA” refers to earnings before interest, taxes, depreciation and amortization;

•        “effective time” refers to the time the merger becomes effective pursuant to the terms of the merger agreement;

•        “Exchange Act” refers to the Securities Exchange Act of 1934, as amended;

•        “FTC” refers to the United States Federal Trade Commission;

•        “GAAP” refers to accounting principles generally accepted in the United States of America;

•        “HSR Act” refers to the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended;

•        “IRS” refers to the United States Internal Revenue Service;

•        “ISR” refers to intelligence, surveillance and reconnaissance;

•        “Kipps” refers to KippsDeSanto & Co., financial advisor to AIR;

•        “merger” refers to the merger of Merger Sub with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR;

•        “merger agreement” refers to the Amended and Restated Agreement and Plan of Merger, dated as of July 2, 2026, among Tenax, AIR and Merger Sub, a copy of which is attached as Annex A to this proxy statement/prospectus, as amended by the Amendment to the Amended and Restated Agreement and Plan of Merger, dated as of July 31, 2026, a copy of which is attached as Annex A-1 to this proxy statement/prospectus;

•        “Merger Sub” refers to Transitory Air Sub LLC, a Delaware limited liability company and wholly owned subsidiary of AIR;

•        “Named Executive Officers” refers to Scott Glassman (Acting Chief Executive Officer and President) and Luciano Melluzzo (Former President and Chief Executive Officer);

•        “NEH” refers to NTC Equity Holdings, LLC;

•        “NRS” refers to the Nevada Revised Statutes;

•        “NTC Group” refers to The NTC Group, Inc.;

•        “NYSE American” refers to the NYSE American LLC;

•        “original merger agreement” refers to that certain Agreement and Plan of Merger, dated as of February 16, 2026, by and among Tenax, AIR and Merger Sub (as amended by the Amendment to the Agreement and Plan of Merger, dated as of June 8, 2026);

•        “Original Transactions” refers to transactions contemplated by the original merger agreement;

•        “record date for the special meeting” refers to [•], 2026;

•        “redemption rights agreement” refers to the redemption rights agreement between AIR and the Rights Agent;

•        “registration rights agreement” refers to the registration rights agreement among AIR, the Tenax Members, the Tenax Warrantholders and NTC Group, as Investors’ Representative;

•        “reverse stock split” refers to the reverse stock split, pursuant to NRS 78.207, of the issued and outstanding shares of AIR common stock at a ratio of one post-split share of AIR common stock for every five pre-split shares of AIR common stock, with any fractional share of AIR common stock otherwise resulting from the split rounded up to the nearest whole share (and a simultaneous and proportional reduction of the number of then authorized shares of AIR common stock);

•        “Rights Agent” refers to Broadridge Corporate Issuer Solutions;

•        “Run-Rate EBITDA” refers to a forward-looking metric that forecasts EBITDA over the next twelve months based on the terms of a company’s current contracts;

•        “SEC” refers to the United States Securities and Exchange Commission;

•        “Securities Act” refers to the Securities Act of 1933, as amended;

•        “special meeting” refers to the special meeting of AIR stockholders to be held on [•], 2026;

•        “stock issuance proposal” refers to the proposal to approve the issuance of AIR common stock as merger consideration pursuant to the terms of the merger agreement, in compliance with Section 713(b) of the NYSE American Company Guide, resulting in a change of control of AIR;

•        “Tenax” refers to Tenax Aerospace Acquisition, LLC, a Delaware limited liability company;

•        “TAH” refers to Tenax Aerospace Holdings, LLC, a wholly owned subsidiary of Tenax;

•        “Tenax LLCA” refers to the Second Amended and Restated Limited Liability Company Agreement of Tenax, dated as of January 7, 2026;

•        “Tenax Member Support Agreement” refers to the Amended and Restated Tenax Member Support Agreement, dated as of July 2, 2026, among Tenax, AIR and NEH;

•        “Tenax Members” refers to the holders of the membership interests of Tenax;

•        “Tenax units” refers to each membership unit of Tenax;

•        “Tenax Warrantholders” refers to AEAMF Aero Funding LLC, ACSF Aero Funding LLC, MMPDFII Aero Blocker, LLC and MetLife Middle Market Private Debt Fund II, LP;

•        “trading day” refers to a day on which the principal national securities exchange on which shares of AIR common stock are listed or admitted to trading is open for the transaction of business or, if such shares of AIR common stock are not listed or admitted to trading on any national securities exchange, a business day;

•        “transaction compensation proposal” refers to the proposal to approve an advisory resolution regarding the compensation that may be paid or become payable to our Named Executive Officers in connection with the merger;

•        “transaction documents” refers to, collectively, the merger agreement, the AIR Stockholder Support Agreement, the Tenax Member Support Agreement, the Tenax Member lock-up agreements, the redemption rights agreement, the registration rights agreement, the certificate of merger and all other contracts delivered or required to be delivered by any party to the merger agreement at or prior to the closing pursuant to the merger agreement;

•        “Transactions” refers to the transactions contemplated by the transaction documents, including the merger and the issuance of the redemption rights;

•        “U.S.” refers to the United States of America; and

•        “written consent proposal” refers to the proposal to amend the articles of incorporation of AIR to authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock.

TABLE OF CONTENTS

QUESTIONS AND ANSWERS ABOUT THE MERGER AND THE SPECIAL MEETING

The following questions and answers are intended to briefly address some commonly asked questions regarding the merger, the merger agreement and the special meeting. These questions and answers may not address all questions that may be important to you as our stockholder. Please refer to the section entitled “Summary” beginning on page 1 of this proxy statement/prospectus and the more detailed information contained elsewhere in this proxy statement/prospectus, the annexes to this proxy statement/prospectus and the information incorporated by reference into this proxy statement/prospectus, which you should read carefully and in their entirety. You may obtain the information incorporated by reference into this proxy statement/prospectus without charge by following the instructions under the section entitled “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus.

Q:     Why am I receiving this proxy statement/prospectus and proxy card?

A:     We have entered into the merger agreement pursuant to which Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR, which will remain a publicly traded corporation listed on NYSE American under the symbol “AIRI”.

Tenax is an aerospace and defense supplier providing special mission aircraft and related aviation equipment and services to the U.S. and Canadian governments and other customers. The company focuses on enduring special mission aviation programs critical to national security and the public interest, including aerial firefighting, airborne ISR, airborne engagement simulation and airborne sensor testing and training.

At the effective time of the merger, we will issue or reserve for issuance, as applicable, shares of AIR common stock to the Tenax Members and the Tenax Warrantholders as merger consideration. Pursuant to the merger agreement, the merger consideration will consist of 126,900,000 shares (which number will be adjusted to 25,380,000 shares after giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split, each as described in this proxy statement/prospectus) of AIR common stock to be issued to the Tenax Members and reserved for issuance to the Tenax Warrantholders upon the exercise of their warrants.

After the closing, the Tenax Members are expected to own approximately 96% of our outstanding AIR common stock, while our existing stockholders are expected to own approximately 4% of our outstanding AIR common stock.

Consummation of the merger is subject to approval by the AIR stockholders of the stock issuance proposal, the authorized shares proposal and the written consent proposal. We are holding the special meeting of our stockholders to ask our stockholders to consider and vote upon (i) the stock issuance proposal, (ii) the authorized shares proposal, (iii) the written consent proposal, (iv) the transaction compensation proposal and (v) the adjournment proposal.

This proxy statement/prospectus is being delivered to you by mail as our stockholder of record, as of the record date for the special meeting, in connection with the solicitation by the AIR Board of proxies to be voted at the special meeting. As a stockholder of record on the record date for the special meeting, you are invited to attend the special meeting and are entitled to and are requested to vote on the items of business described in this proxy statement/prospectus. This proxy statement/prospectus includes important information about the merger, the merger agreement, a copy of which is attached as Annex A to this proxy statement/prospectus, and the special meeting. You should read this information carefully and in its entirety before making any voting decisions.

Q:     How does this proxy statement/prospectus relate to the preliminary proxy statement previously filed by AIR with the SEC relating to the merger?

A:     On May 5, 2026, AIR filed a preliminary proxy statement with the SEC relating to the merger and containing certain of the information set forth in this proxy statement/prospectus. On July 2, 2026, AIR, Tenax and Merger Sub entered into the merger agreement, which amended and restated the original merger agreement to, among other things, require that AIR file a registration statement on Form S-4 with respect to the shares of AIR common stock to be issued to the Tenax Members as merger consideration. The purpose in including this requirement in the merger agreement was to facilitate the combined company’s satisfaction of the NYSE

American listing requirement that the combined company have an aggregate market value of unrestricted publicly-held shares of at least $15 million. This proxy statement/prospectus sets forth additional information not contained in AIR’s previously filed preliminary proxy statement in order to reflect the terms of the amended and restated merger agreement and to satisfy the requirements of Form S-4.

Q:     What items of business will be voted on at the special meeting?

A:     The items of business scheduled for the special meeting are:

Proposal 1:    The stock issuance proposal.

Proposal 2:    The authorized shares proposal.

Proposal 3:    The written consent proposal.

Proposal 4:    The transaction compensation proposal.

Proposal 5:    The adjournment proposal.

Q:     How does the AIR Board recommend that I vote?

A:     The AIR Board unanimously recommends a vote:

1.      FOR the stock issuance proposal;

2.      FOR the authorized shares proposal;

3.      FOR the written consent proposal;

4.      FOR the transaction compensation proposal; and

5.      FOR the adjournment proposal.

Q:     What is the voting requirement to approve each of the proposals?

A:     The following voting requirements will be in effect for each proposal described in this proxy statement/prospectus:

Proposal 1.    Approval of the stock issuance proposal requires that the number of shares voted “FOR” the stock issuance proposal must exceed the number of votes cast “AGAINST” the stock issuance proposal. Abstentions and broker non-votes will have no effect.

Proposal 2.    Approval of the authorized shares proposal requires that the number of shares voted “FOR” the authorized shares proposal must exceed the number of votes cast “AGAINST” the authorized shares proposal. Abstentions and broker non-votes will have no effect.

Proposal 3.    Approval of the written consent proposal requires the affirmative vote of the holders of shares representing at least a majority of the voting power of the outstanding shares of AIR common stock entitled to vote thereon as of the record date for the special meeting. A failure to vote, a broker non-vote or an abstention will each have the same effect as a vote “AGAINST” this proposal.

Proposal 4.    Approval of the transaction compensation proposal (on a non-binding, advisory basis) requires that the number of shares voted “FOR” the transaction compensation proposal must exceed the number of votes cast “AGAINST” the transaction compensation proposal. Abstentions and broker non-votes will have no effect.

Proposal 5.    Approval of the adjournment proposal requires that the number of shares voted “FOR” the adjournment proposal must exceed the number of votes cast “AGAINST” the adjournment proposal. Abstentions and broker non-votes will have no effect.

Q:     What will happen to my shares of AIR common stock, my AIR stock options and my AIR RSUs in connection with the merger?

A:     Upon completion of the merger, your shares of AIR common stock will remain outstanding and will not be converted into or exchanged for any other securities or cash. Your AIR stock options and your AIR RSUs will also remain outstanding and will continue on the same terms and conditions as were applicable immediately prior to the effective time. As a result of the issuance of the merger consideration to the Tenax Members, however, the overall ownership percentage of current AIR stockholders will be diluted upon completion of the merger.

Q:     Will I receive anything if the merger is completed?

A:     Prior to the closing, AIR will declare and issue, as a dividend to AIR stockholders as of the trading day immediately preceding the closing date, a right to cause AIR to redeem shares of AIR common stock that such AIR stockholders then own and continue to own on the first anniversary of the closing (a “Redemption Right”). The Redemption Rights will entitle the holders thereof to require AIR to purchase all or a portion of such AIR stockholder’s shares of AIR common stock for a redemption price, payable in cash, equal to 107.3% of the Debt Adjusted AIR Share Price, if the volume weighted average price of AIR common stock during the 20 trading days preceding the first anniversary of the closing is lower than 107.3% of the Debt Adjusted AIR Share Price. The Redemption Rights will not be transferable. See the section entitled “Other Related Agreements — Redemption Rights Agreement” beginning on page 87 of this proxy statement/prospectus.

Q:     What will the capital structure of AIR be after the consummation of the merger?

A:     As a result of the merger, the AIR stockholders as of immediately prior to the effective time will collectively own approximately 4% of the outstanding shares of AIR common stock, on a fully diluted basis, and the Tenax Members and Tenax Warrantholders will collectively own approximately 96% of the outstanding shares of AIR common stock, on a fully diluted basis, in each case subject to adjustment in accordance with the terms of the merger agreement. Following the merger, AIR will remain a publicly traded corporation, and shares of AIR common stock will continue to be listed on the NYSE American.

Q:     Who will serve on the AIR Board following the merger?

A:     In accordance with the merger agreement and concurrent with the merger, the AIR Board will be reconstituted such that it is composed of no fewer than eight directors, which shall consist only of (a) no fewer than six individuals designated by Tenax, namely Thomas Foley, Taran Bakker, Timothy Cantrell, Michael Ewald, Donald Fawcett, Bryan Fenton, DeWolfe Miller and John Young, and (b) two individuals to be mutually agreed upon by Tenax and AIR, namely [•] and [•], to hold office in accordance with the articles of incorporation and bylaws of AIR. See the section entitled “The Merger — Governance of AIR Following the Merger” beginning on page 64 of this proxy statement/prospectus.

Q:     Am I entitled to exercise dissenter’s rights in connection with the Transactions?

A:     No. Pursuant to the NRS, there are no dissenter’s rights available to the AIR stockholders in connection with the Transactions.

Q:     Do any of the AIR directors or executive officers have interests in the merger that may differ from or be in addition to my interests as an AIR stockholder?

A:     AIR’s directors and executive officers have certain interests in the merger that are different from, or in addition to, the interests of the AIR stockholders generally. The members of the AIR Board were aware of and considered these interests, among other matters, in evaluating, negotiating and approving the merger agreement and in determining to recommend that AIR stockholders approve the stock issuance proposal, the authorized shares proposal and the written consent proposal. See the section entitled “The Merger — Interests of AIR’s Directors and Executive Officers in the Merger” beginning on page 51 of this proxy statement/prospectus.

Q:     What are the material U.S. federal income tax consequences of the Transactions to the AIR stockholders?

Q1:   Will I be taxed upon receipt of my Redemption Rights?

A1.   The U.S. federal income tax consequences of your receipt of Redemption Rights is unclear. We intend to take the position that your receipt of the Redemption Rights constitutes an “open transaction”. Absent a change in law requiring otherwise after the date of the redemption rights agreement, we will not report the issuance of the Redemption Rights to you as a current distribution. This position may be challenged by the IRS, in which case you could be required to recognize taxable income in respect of your Redemption Rights without the corresponding receipt of cash. For a more complete description of the material U.S. federal income tax consequences of your receipt of Redemption Rights, including possible alternative tax treatments, see the section entitled “Material U.S. Federal Income Tax Consequences of the Transactions — Redemption Rights” beginning on page 92 of this proxy statement/prospectus.

Q2.   Will I be taxed as a result of the merger?

A2.   You will not recognize gain or loss for U.S. federal income tax purposes as a result of the merger and your holding period in your AIR common stock will remain unchanged.

Q:     When is the merger expected to be completed?

A:     Subject to the satisfaction or waiver of the closing conditions described under the section entitled “The Merger Agreement — Conditions to Completion of the Merger” beginning on page 82 of this proxy statement/prospectus, including the approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal by our stockholders at the special meeting, we and Tenax currently expect that the merger will be completed in the fourth quarter of 2026. However, it is possible that factors outside the control of both companies could result in the merger being completed at a different time or not at all.

Q:     Are there any risks that I should consider in deciding whether to vote for the stock issuance proposal, the authorized shares proposal and the written consent proposal?

A:     Yes. You should read and carefully consider the risks described in the section entitled “Risk Factors” beginning on page 16 of this proxy statement/prospectus.

Q:     What are the conditions to the completion of the merger?

A:     In addition to approval by our stockholders of the stock issuance proposal, the authorized shares proposal and the written consent proposal as described above, completion of the merger is subject to the satisfaction or waiver of a number of other conditions, including, among others, the effectiveness of the registration statement on Form S-4 of which this proxy statement/prospectus forms a part, approval for the listing of the AIR common stock to be issued as merger consideration on the NYSE American, receipt of certain required regulatory approvals, the accuracy of representations and warranties in the merger agreement (subject to certain materiality exceptions, other customary exceptions and customary cure rights), the absence of a material adverse effect on Tenax or AIR and Tenax’s and AIR’s performance in all material respects of their respective obligations under the merger agreement. For a more complete summary of the conditions that must be satisfied or waived prior to completion of the merger, see the section entitled “The Merger Agreement — Conditions to Completion of the Merger” beginning on page 82 of this proxy statement/prospectus.

Q:     Is consummation of the merger contingent upon any future approval by the Tenax Members?

A:     No. Concurrently with entering into the merger agreement, Tenax has obtained all approvals and consents of the Tenax Members necessary to effect the merger and the other Transactions. No further approvals by the Tenax Members are required to consummate the merger or the other Transactions other than those already obtained.

Q:     What happens if the merger is not completed?

A:     If the stock issuance proposal, the authorized shares proposal and the written consent proposal are not approved by our stockholders or if the merger is not completed for any other reason, the AIR and Tenax businesses will not be combined. Accordingly, the Tenax Members will not receive shares of AIR common stock and the AIR stockholders will not be entitled to receive or exercise the Redemption Rights. If the merger agreement is terminated, under specified circumstances, we may be required to pay Tenax a termination fee of $1.25 million, and, if the merger agreement is terminated in certain other specified circumstances, Tenax may be required to pay us a reverse termination fee of $1.25 million. See the section entitled “The Merger Agreement — Termination of the Merger Agreement; Termination Fees” beginning on page 83 of this proxy statement/prospectus.

Q:     What happens if the transaction compensation proposal to approve, on a non-binding, advisory basis, the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger is not approved?

A:     Approval, on a non-binding, advisory basis, of the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger is not a condition to consummation of the merger. The vote on the transaction compensation proposal is a non-binding, advisory vote. If the merger is completed, AIR may be obligated to pay all or a portion of this compensation to its Named Executive Officers in connection with the merger or certain terminations of employment following the merger, even if AIR stockholders fail to approve the transaction compensation proposal.

Q:     Does my vote matter?

A:     Yes. The merger cannot be completed unless the stock issuance proposal, the authorized shares proposal and the written consent proposal are approved by our stockholders.

The effect of your vote depends on which proposal is being considered:

For the written consent proposal, if you fail to submit a proxy or vote in person at the special meeting, if your broker, bank or other nominee does not receive voting instructions from you, or if you vote to abstain, this will have the same effect as a vote “AGAINST” the proposal, because approval requires the affirmative vote of at least a majority of the voting power of all outstanding shares of AIR common stock entitled to vote as of the record date for the special meeting.

For the stock issuance proposal, the authorized shares proposal, the transaction compensation proposal and the adjournment proposal, a failure to vote, a broker non-vote or an abstention will have no effect on the outcome of the applicable vote, because approval requires only that the votes cast “FOR” exceed the votes cast “AGAINST,” and abstentions and broker non-votes are not counted as votes cast.

Q:     What shares can I vote at the special meeting?

A:     The AIR Board has fixed the close of business on [•], 2026, as the record date for the special meeting. Only holders of record of the outstanding shares of AIR common stock at the close of business on the record date for the special meeting are entitled to vote at the special meeting or any adjournments thereof.

As of the close of business on the record date for the special meeting, we had [•] shares of AIR common stock issued and outstanding. A holder of shares of AIR common stock is entitled to one vote, in person or by proxy, for each share of AIR common stock on all matters properly brought before the special meeting.

Q:     How many shares must be present or represented to conduct business at the special meeting?

A:     The presence, in person or by proxy, of the holders of 33⅓% in voting power of the outstanding shares of stock entitled to vote at the special meeting or any adjournment thereof is necessary to constitute a quorum to transact business. However, approval of the written consent proposal requires that the holders of at least a majority of the voting power of the outstanding shares of AIR common stock outstanding as of the record date for the special meeting vote in favor of the written consent proposal. Accordingly, approval of the written consent proposal will require the participation of a greater number of AIR stockholders than the minimum needed to establish a quorum.

Abstentions and broker non-votes (shares held by brokers, trustees or other nominees as to which they have no discretionary power to vote on a particular matter and have received no instructions from the beneficial owners of such shares or persons entitled to vote on the matter) will be counted as present at the special meeting for the purpose of determining whether a quorum is present. If your shares are held by a broker, trustee or other nominee on your behalf and you do not instruct the broker, trustee or other nominee as to how to vote these shares on Proposal 1 (the stock issuance proposal), Proposal 2 (the authorized shares proposal), Proposal 3 (the written consent proposal), Proposal 4 (the transaction compensation proposal) and Proposal 5 (the adjournment proposal), the broker, trustee or other nominee may not exercise discretion to vote for or against those proposals. This would be a “broker non-vote”. For Proposal 1 (the stock issuance proposal), Proposal 2 (the authorized shares proposal), Proposal 4 (the transaction compensation proposal) and Proposal 5 (the adjournment proposal), these shares will not be counted as having been voted and therefore will have no effect on the vote for that proposal, assuming a quorum is present. For Proposal 3 (the written consent proposal), a broker non-vote will have the same effect as a vote “AGAINST” such proposal. Please instruct your broker, trustee or other nominee so your vote can be counted.

Q:     How can I vote my shares at the special meeting?

A:     Shares held in your name as the stockholder of record may be voted in person at the special meeting. Shares for which you are the beneficial owner, but not the stockholder of record, may be voted in person at the special meeting only if you obtain a legal proxy from the broker, trustee or nominee that holds your shares giving you the right to vote the shares.

Even if you plan to attend the special meeting, we recommend that you also vote by proxy as described below so that your vote will be counted if you later decide not to attend the special meeting. Voting in person at the special meeting will revoke any previously submitted proxy.

Q:     How can I vote my shares without attending the special meeting?

A:     If you are a stockholder as of the record date for the special meeting, you may cast your vote in one of the following ways:

By Internet — Stockholders who have received a proxy card or voting instruction form may vote over the Internet by visiting the website indicated and following the instructions on the proxy card or voting instruction form.

By Telephone — Stockholders of record who live in the United States or Canada may submit proxies by telephone by calling 1-800-690-6903 and following the instructions. Stockholders of record who have received a proxy card by mail must have the control number that appears on their proxy card available when voting. Most stockholders who are beneficial owners of their shares, but not stockholders of record, living in the United States or Canada and who have received a voting instruction form may vote by phone, by calling the number specified on the voting instruction form provided by their broker, trustee or nominee. Those stockholders should check the voting instruction form for telephone voting availability.

By Mail — Stockholders who have received a proxy card or voting instruction form may submit proxies by completing, signing and dating their proxy card or voting instruction form and mailing it in the accompanying pre-addressed envelope.

Telephone and Internet voting facilities for stockholders of record will be available 24 hours a day and will close at 11:59 P.M. (Eastern Time) on [•], 2026. Votes cast by mail must be received in sufficient time to allow processing. Shares represented by duly executed proxies in the accompanying proxy card or voting instruction form will be voted in accordance with the instructions indicated on such proxies or voting instruction forms and, if no such instructions are indicated thereon, will be voted (i) FOR the stock issuance proposal, (ii) FOR the authorized shares proposal, (iii) FOR the written consent proposal, (iv) FOR the transaction compensation proposal and (v) FOR the adjournment proposal.

Q:     What if I want to change my vote?

A:     If the enclosed proxy card or voting instruction form is signed and returned, you may, nevertheless, revoke it at any time prior to the special meeting by (i) filing a written notice of revocation with the person or persons named on the proxy card or voting instruction form; (ii) attending the special meeting and voting the shares covered thereby in person; or (iii) delivering to the addressee named in the enclosed proxy card or voting instruction form another duly executed proxy card or voting instruction form dated subsequent to the date of the proxy card or voting instruction form to be revoked.

Q:     When and where is the special meeting?

A:     The special meeting will be held at 1460 Fifth Avenue, Bay Shore, New York 11706 on [•], 2026, at [•] [A.M./P.M.], Eastern Time, or at any adjournments thereof, for the purposes stated in the Notice of Special Meeting of Stockholders.

Q:     Do I need a ticket to attend the special meeting?

A:     If you plan to attend the special meeting in person:    You will need an admission ticket or proof of ownership of our common stock to enter the special meeting. If you hold shares directly in your name as a stockholder of record and have received a copy of our proxy materials, an admission ticket is attached to your printed proxy card. If you plan to attend the special meeting, please vote your proxy prior to the special meeting but keep the admission ticket and bring it with you to the special meeting.

If your shares are held beneficially in the name of a broker, trustee or other nominee and you wish to be admitted to the special meeting, you will have to bring either a copy of the voting instruction form provided by your broker, trustee or other nominee, or a copy of a brokerage statement showing your ownership of our common stock as of [•], 2026.

If you are representing an entity holding shares, then you must present a proxy signed by that entity evidencing that you are authorized to attend the special meeting and vote the shares or are otherwise representing the entity at the special meeting. If you are representing an entity whose shares are held beneficially in the name of a broker, trustee or other nominee, you will have to bring either a copy of the voting instruction form provided by such entity’s broker, trustee or other nominee, or a copy of a brokerage statement showing the entity’s ownership of our common stock as of [•], 2026, in addition to the proxy signed by the entity you are representing.

All stockholders must also present a form of photo identification, such as a valid driver’s license or passport, in order to be admitted to the special meeting.

Q:     What should I do if I receive more than one copy of the proxy materials?

A:     You may receive more than one copy of the proxy materials, including multiple paper copies of this proxy statement/prospectus and multiple proxy cards or voting instruction forms.

For example, if you hold your shares in more than one brokerage account, you may receive a separate voting instruction form for each brokerage account in which you hold shares. If you are a stockholder of record and your shares are registered in more than one name, you may receive more than one proxy card. If you hold your shares through a broker, trustee or another nominee, rather than owning shares registered directly in your name, you are considered the beneficial owner of shares held in street name. As the beneficial owner, you are entitled to direct the voting of your shares by your intermediary. Your intermediary will forward the proxy materials to you with a voting instruction form or provide electronic access to the materials and to voting facilities. To vote all of your shares by proxy, you must complete, sign, date and return each proxy card and voting instruction form that you receive.

Q:     How may I obtain a copy of AIR’s 2025 Form 10-K, Q1 Form 10-Q, Q2 Form 10-Q and other financial information?

A:     Stockholders may request a free copy of our 2025 Form 10-K, Q1 Form 10-Q and Q2 Form 10-Q by writing to us at the following address:

1460 Fifth Avenue
Bay Shore, NY 11706
Attn: Investor Relations
Telephone: (631) 968-5000

Alternatively, stockholders can contact AIR’s proxy solicitor, Advantage Proxy, by calling toll-free at (877) 870-8565 or, for banks, brokerage firms and other nominees, collect at (206) 870-8565. In addition, stockholders may obtain free copies of the documents AIR files with the SEC by going to AIR’s Internet website at www.investors.airindustriesgroup.com under the “Financials” heading and then under the “SEC Filings” link. The Internet website address of AIR is provided as an inactive textual reference only.

We also will furnish any exhibit to our 2025 Form 10-K, Q1 Form 10-Q and Q2 Form 10-Q if specifically requested. You may also obtain additional information about us from documents filed with the SEC by following the instructions in the section entitled “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus.

Q:     Who can help answer any other questions I have?

A:     If you have additional questions about the merger, need assistance in submitting your proxy or voting your shares of our common stock, or need additional copies of this proxy statement/prospectus or the enclosed proxy card, please contact Advantage Proxy, our proxy solicitor, by calling toll-free at (877) 870-8565. Banks, brokerage firms and other nominees may call collect at (206) 870-8565.

Q:     Who will solicit and pay the cost of soliciting proxies?

A:     We have engaged Advantage Proxy to assist in the solicitation of proxies for the special meeting. We estimate that we will pay Advantage Proxy a fee of $10,000 to $12,500 plus an additional nominal fee per incoming and outgoing telephone contact. We have agreed to reimburse Advantage Proxy for certain out-of-pocket fees and expenses and also will indemnify Advantage Proxy against certain losses, claims, damages, liabilities or expenses. We also may reimburse banks, brokerage firms, other nominees or their respective agents for their expenses in forwarding proxy materials to beneficial owners of our common stock. Our directors, officers and employees also may solicit proxies by telephone, by facsimile, by mail, on the Internet or in person. They will not be paid any additional amounts for soliciting proxies.

Q:     Who will serve as inspector of elections?

A:     The inspector of elections will be a representative from Broadridge Corporate Issuer Solutions.

Q:     Can additional matters be presented at the special meeting?

A:     No. Business transacted at any special meeting of stockholders shall be limited to the purpose or purposes stated in the Notice of Special Meeting of Stockholders.

PROSPECTUS SUMMARY

The following summary highlights selected information in this proxy statement/prospectus and may not contain all the information that may be important to you as our stockholder. Accordingly, we encourage you to read this entire proxy statement/prospectus, its annexes and the information incorporated by reference herein carefully. Each item in this summary includes a page reference directing you to a more complete description of that topic. You may obtain the information incorporated by reference into this proxy statement/prospectus without charge by following the instructions under the section entitled “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus.

Parties to the Merger (page 37)

Air Industries Group
1460 Fifth Avenue
Bay Shore, NY 11706
(631) 968-5000

AIR is a manufacturer of precision components and assemblies for large aerospace and defense prime contractors. Its products include landing gears, flight controls, engine mounts and components for aircraft jet engines, ground turbines and other complex machines. Whether it is a small individual component or complete assembly, its high-quality and highly reliable products are used in mission-critical operations essential for the safety of military personnel and civilians. AIR operates two primary manufacturing facilities located in Bay Shore, New York, and Barkhamsted, Connecticut, and currently employs approximately 158 people.

AIR common stock is listed on the NYSE American under the symbol “AIRI”.

Tenax Aerospace Acquisition, LLC
400 West Parkway Place, Suite 201
Ridgeland, MS 39157
(601) 352-1107

Tenax is an aerospace and defense supplier providing special mission aircraft and related aviation equipment and services to the U.S. and Canadian governments and other customers. The company focuses on enduring special mission aviation programs critical to national security and the public interest, including aerial firefighting, airborne ISR, airborne engagement simulation and airborne sensor testing and training. Founded in 2001, Tenax is privately owned and headquartered in Ridgeland, Mississippi. Tenax currently employs approximately 248 people.

Transitory Air Sub LLC
1460 Fifth Avenue
Bay Shore, NY 11706
(631) 968-5000

Merger Sub was formed solely for the purpose of facilitating the merger and the Transactions. Merger Sub has not carried on any activities or operations to date, except for those activities incidental to its formation and undertaken in connection with the merger and the Transactions. Pursuant to the merger agreement, at the effective time, Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR.

The Merger (page 38)

The terms and conditions of the merger are contained in the merger agreement, which is included in this proxy statement/prospectus as Annex A and is incorporated herein by reference in its entirety. The rights and obligations of each of Tenax, AIR and Merger Sub are governed by the express terms and conditions of the merger agreement and not by this summary or any other information contained in this proxy statement/prospectus. Our stockholders are urged to read the merger agreement as well as this proxy statement/prospectus carefully and in their entirety before making any voting decisions, including the approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

Pursuant to the merger agreement, at the effective time, Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR.

Conversion of Securities; Adjustments to the Merger Consideration (page 38)

At the effective time, Tenax units issued and outstanding immediately prior to the effective time will be converted into the right to receive the portion of the merger consideration allocated in respect thereof. Pursuant to the merger agreement, the merger consideration will consist of 126,900,000 shares (which number will be adjusted to 25,380,000 shares after giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split, each as described in this proxy statement/prospectus) of AIR common stock to be issued to the Tenax Members and, as applicable, reserved for issuance to the Tenax Warrantholders upon the exercise of their warrants. The allocation of the merger consideration among the Tenax Members will be set forth in the capitalization schedule, which Tenax is required to deliver no less than two business days prior to the closing.

Ownership of AIR Following the Merger (page 38)

As a result of the merger, the AIR stockholders as of immediately prior to the effective time will collectively own approximately 4% of the outstanding shares of AIR common stock, on a fully diluted basis, and the Tenax Members and Tenax Warrantholders will collectively own approximately 96% of the outstanding shares of AIR common stock, on a fully diluted basis. Accordingly, the merger will result in substantial dilution to existing AIR stockholders, and the Tenax Members will have a controlling interest in AIR following completion of the merger. Following the merger, AIR will remain a publicly traded corporation, and shares of AIR common stock will continue to be listed on the NYSE American.

A portion of the merger consideration is allocable to holders of warrants of Tenax, referred to as the Tenax Warrantholders. AIR will reserve for future issuance, upon exercise of the warrants, a number of shares of AIR common stock equal to the total merger consideration that would be payable to the Tenax Warrantholders if all Tenax Warrantholders exercised their warrants (if and to the extent they remain outstanding) immediately prior to the effective time.

Governance of AIR Following the Merger (page 64)

Board of Directors

Following the consummation of the merger, the AIR Board will be composed of no fewer than eight directors, which shall consist only of (a) no fewer than six individuals designated by Tenax, namely Thomas Foley, Taran Bakker, Timothy Cantrell, Michael Ewald, Donald Fawcett, Bryan Fenton, DeWolfe Miller and John Young, and (b) two individuals to be mutually agreed upon by Tenax and AIR, namely [•] and [•], to hold office in accordance with the articles of incorporation and bylaws of AIR.

Timothy Cantrell, Michael Ewald, Donald Fawcett, Bryan Fenton, DeWolfe Miller, John Young, [•] and [•] are expected to be “independent directors” within the meaning of Item 407(a)(1) and NYSE American Rule 803A(2).

Following the consummation of the merger, the audit committee of the AIR Board (the “Audit Committee”) will be composed of members who meet the independence requirements set forth by the SEC, in the NYSE American listing requirements and the Audit Committee charter. Each member of the Audit Committee will be financially literate in accordance with the NYSE American listing requirements.

For more information, see the section entitled “Management and Directors of the Combined Company” beginning on page 154 of this proxy statement/prospectus.

Management

AIR’s executive team following the merger will draw on the leadership teams of AIR and Tenax. In particular, Jim Linder, Ignacio Ladegui and Alan Oswalt, current executive officers of Tenax, will become Chief Executive Officer, Chief Financial Officer and EVP of Operations, respectively, of the combined company.

Tenax and its members, through the date on which the merger agreement was signed by all parties, made no arrangements with, and made no offers to, any members of AIR’s management team regarding continued employment with AIR.

For more information, see the section entitled “Management and Directors of the Combined Company” beginning on page 154 of this proxy statement/prospectus.

Controlled Company

Following the consummation of the merger, AIR will be a “controlled company” for purposes of Section 801(a) of the NYSE American Company Guide and, if and for so long as it so qualifies, intends to rely on exemptions from certain governance standards.

Under Section 801(a), a company in which over 50% of the voting power is held by an individual, a group or another company is a “controlled company” and is exempt from certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions from the requirements that (1) director nominees be selected or recommended for selection by a majority of the independent directors or by a nominating committee composed solely of independent directors and (2) compensation of the chief executive officer be determined or recommended to the board of directors by a majority of its independent directors or by a compensation committee composed of independent directors. AIR does not intend to rely on the exemption from the requirement that a majority of AIR’s board of directors consist of independent directors.

Smaller Reporting Company

Following the consummation of the merger, AIR is expected to qualify as a “Smaller Reporting Company” for purposes of Section 801(h) of the NYSE American Company Guide and, if and for so long as it so qualifies, intends to rely on exemptions from certain governance standards.

Under Section 801(h), a company that satisfies the definition of smaller reporting company in Rule 12b-2 of the Exchange Act, meaning it is an issuer that is not an investment company, an asset-backed issuer or a majority-owned subsidiary of a parent that is not a smaller reporting company and that (1) has a public float of less than $250 million or (2) has annual revenues of less than $100 million and either (i) no public float or (ii) a public float of less than $700 million, is a “Smaller Reporting Company”. Smaller Reporting Companies are exempt from certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions allowing (1) an audit committee of at least two independent members (rather than three independent members), (2) a compensation committee that is not composed of independent directors and (3) selection of a compensation consultant, legal counsel or other adviser to the compensation committee without consideration of such adviser’s independence. AIR does not intend to rely on the exemption allowing a board of directors composed of at least 50% independent directors (rather than a majority of independent directors).

Recommendation of the AIR Board; AIR’s Reasons for the Merger (page 49)

After careful consideration, the AIR Board unanimously (i) determined that the merger agreement and the Transactions are fair to and in the best interests of AIR and its stockholders and (ii) adopted and approved the merger agreement and the Transactions, on the terms and subject to the conditions set forth in the merger agreement. Accordingly, the AIR Board unanimously recommends that AIR’s stockholders vote “FOR” the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal. For more information on AIR’s reasons for the merger and the recommendation of the AIR Board, see the section entitled “The Merger — Recommendation of the AIR Board; AIR’s Reasons for the Merger” beginning on page 49 of this proxy statement/prospectus.

Opinion of AIR’s Financial Advisor (page 54)

AIR retained Kipps to act as its financial advisor in connection with the Transactions. As part of this engagement, the AIR Board requested that Kipps evaluate the fairness to the holders of the AIR common stock, from a financial point of view, of the unadjusted redemption price. At the meeting of the AIR Board on February 13, 2026, Kipps rendered its oral opinion to the AIR Board that as of the date of such opinion and based upon and subject to the assumptions, limitations, qualifications and conditions described in Kipps’s written opinion, an unadjusted redemption price of $4.21 was fair, from a financial point of view, to the holders of the AIR common stock. On February 17, 2026, Kipps delivered to the AIR Board a written opinion and an updated presentation, each dated

February 17, 2026, confirming that, as of the date of such opinion and based upon and subject to the assumptions, limitations, qualifications and conditions described in such opinion, an unadjusted redemption price of $4.18 was fair, from a financial point of view, to the holders of the AIR common stock.

AIR stockholders should be aware that Kipps’s written opinion was based on an assumed unadjusted redemption price of $4.18 per share, which was calculated at the direction of AIR’s management based on a formula set forth in the original merger agreement. The actual redemption price will be materially lower than the price per share on which Kipps rendered its fairness opinion.

The full text of the written opinion of Kipps, dated February 17, 2026, which sets forth, among other things, the procedures followed, assumptions made, matters considered and qualifications and limitations on the scope of review undertaken in rendering its opinion, is attached as Annex B and is incorporated herein by reference into this proxy statement/prospectus in its entirety. The summary of the opinion of Kipps in this proxy statement/prospectus is qualified in its entirety by reference to the full text of the written opinion. You are urged to read Kipps’s opinion carefully and in its entirety. Kipps’s opinion was addressed to, and provided for the information and benefit of, the AIR Board (in its capacity as such) in connection with its evaluation of the Original Transactions. The opinion does not constitute a recommendation to the AIR Board or to any other persons in respect of the Original Transactions or the Transactions, including as to how any holder of shares of AIR common stock should vote or act in respect of the Original Transactions or the Transactions. Kipps’s opinion does not address the relative merits of the Original Transactions or the Transactions as compared to other business or financial strategies that might be available to AIR, nor does it address the underlying business decision of AIR to engage in the Original Transactions or the Transactions.

For more information, see the section entitled “The Merger — Opinion of AIR’s Financial Advisor” beginning on page 54 of this proxy statement/prospectus and the full text of the written opinion of Kipps attached as Annex B to this proxy statement/prospectus.

Tenax’s Reasons for the Merger (page 62)

In evaluating the merger and the other Transactions, the Tenax Board, in consultation with Tenax’s management and advisors, considered a number of factors weighing both in favor of and against the merger and approved the merger agreement and the Transactions. In particular, the Tenax Board believed the merger would combine Tenax with an established, publicly traded aerospace and defense company to create a platform with broader capabilities, customer relationships and growth opportunities than Tenax would have on a stand-alone basis.

For more information, see the section entitled “The Merger — Tenax’s Reasons for the Merger” beginning on page 62 of this proxy statement/prospectus.

Information About the Special Meeting (page 34)

The special meeting will be held on [•], 2026, at [•] [A.M./P.M.], Eastern Time, at 1460 Fifth Avenue, Bay Shore, New York 11706. The special meeting is being held in order to vote on the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal. The merger cannot be completed unless the stock issuance proposal, the authorized shares proposal and the written consent proposal are approved by our stockholders.

The following voting requirements will be in effect for each proposal described in this proxy statement/prospectus:

•        Approval of the stock issuance proposal requires that the number of shares voted “FOR” the stock issuance proposal must exceed the number of votes cast “AGAINST” the stock issuance proposal. Abstentions and broker non-votes will have no effect.

•        Approval of the authorized shares proposal requires that the number of shares voted “FOR” the authorized shares proposal must exceed the number of votes cast “AGAINST” the authorized shares proposal. Abstentions and broker non-votes will have no effect.

•        Approval of the written consent proposal requires the affirmative vote of the holders of shares representing at least a majority of the voting power of the outstanding shares of AIR common stock entitled to vote thereon as of the record date for the special meeting. A failure to vote, a broker non-vote or an abstention will each have the same effect as a vote “AGAINST” this proposal.

•        Approval of the transaction compensation proposal (on a non-binding, advisory basis) requires that the number of shares voted “FOR” the transaction compensation proposal must exceed the number of votes cast “AGAINST” the transaction compensation proposal. Abstentions and broker non-votes will have no effect.

•        Approval of the adjournment proposal requires that the number of shares voted “FOR” the adjournment proposal must exceed the number of votes cast “AGAINST” the adjournment proposal. Abstentions and broker non-votes will have no effect.

The AIR Board has fixed the close of business on [•], 2026, as the record date for the special meeting. Only holders of record of the outstanding shares of AIR common stock at the close of business on the record date for the special meeting are entitled to vote at the special meeting or any adjournments thereof.

As of the close of business on the record date for the special meeting, we had [•] shares of AIR common stock issued and outstanding. A holder of shares of AIR common stock is entitled to one vote, in person or by proxy, for each share of AIR common stock on all matters properly brought before the special meeting.

Interests of AIR’s Directors and Executive Officers in the Merger (page 51)

In considering the recommendation of the AIR Board, AIR stockholders should be aware that certain directors and executive officers of AIR have interests in the Transactions that may be different from, or in addition to, the interests they may have as stockholders. Specifically, Michael Taglich and Robert Taglich, directors of AIR, hold subordinated notes, which will be repaid at closing pursuant to the merger agreement. In addition, AIR RSUs and AIR stock option awards (collectively, “AIR Equity Awards”) issued under the AIR Stock Plans and associated award agreements will continue on the same terms and conditions, and will be eligible for accelerated vesting upon a termination without “cause” within two years following the effective time. Pursuant to the terms of the applicable award agreements, certain holders may also be entitled to additional time in which to exercise any stock options if their engagement by AIR is terminated under prescribed circumstances. As of August 31, 2026, AIR’s directors and executive officers beneficially owned, in the aggregate, approximately 28.48% of the shares of AIR common stock, including shares of AIR common stock issuable upon exercise or settlement of AIR Equity Awards. All directors and executive officers of AIR have entered into a support agreement in connection with the merger to vote all shares of AIR common stock owned by them as of the record date in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

The members of the AIR Board were aware of and considered the interests discussed in the preceding paragraph, among other matters, in evaluating and negotiating the merger agreement, in approving the merger agreement and in determining to recommend that stockholders approve the stock issuance proposal, the authorized shares proposal and the written consent proposal. For more information, see the section entitled “The Merger — Interests of AIR’s Directors and Executive Officers in the Merger” beginning on page 51 of this proxy statement/prospectus.

Interests of Certain Participants in the Solicitation (page 54)

Our directors and executive officers may solicit proxies by telephone or otherwise in respect of the proposals to be considered at the special meeting and may be deemed to be “participants” under the SEC rules in regard to such solicitation of AIR stockholders. AIR stockholders should be aware that all of the directors and Messrs. Glassman and Drisgula have interests in the merger that may be different from, or in addition to, those of AIR stockholders generally. All of our directors and Mr. Glassman will benefit from the treatment of outstanding AIR RSUs and AIR stock options, and Michael Taglich and Robert Taglich will benefit from the payment of subordinated notes held by them as more fully described under “The Merger — Interests of AIR’s Directors and Executive Officers in the Merger” beginning on page 51 of this proxy statement/prospectus. In addition, AIR’s directors and executive officers will benefit from the indemnification and insurance arrangements described under “The Merger Agreement — Directors’ and Officers’ Indemnification and Insurance” beginning on page 79 of this proxy statement/prospectus.

For more information, see the section entitled “The Merger — Interests of Certain Participants in the Solicitation” beginning on page 54 of this proxy statement/prospectus.

Interests of Tenax’s Managers and Executive Officers in the Merger (page 63)

Certain members of the Tenax Board and certain of Tenax’s executive officers have interests in the merger that are different from, or in addition to, the interests of Tenax Members generally.

Thomas Foley and Taran Bakker are currently members of the Tenax Board and are expected to become directors of the combined company upon the closing of the merger. Jim Linder, Ignacio Ladegui and Alan Oswalt are currently executive officers of Tenax and are expected to become executive officers of the combined company, in connection with which they may enter into new employment agreements to reflect their status as executive officers of a publicly-traded company. Following completion of the merger, it is expected that the combined company will provide compensation to non-employee directors pursuant to a new non-employee director compensation policy that is expected to be adopted post-closing.

As of August 31, 2026, Tenax’s then-current non-employee managers and executive officers beneficially owned (indirectly through membership interests in NEH and Managers Equity, LLC), in the aggregate, approximately 78% of the Tenax units. Such Tenax units will be converted into shares of AIR common stock at the effective time.

For more information, see the section entitled “The Merger — Interests of Tenax’s Managers and Executive Officers in the Merger” beginning on page 63 of this proxy statement/prospectus.

Regulatory Approvals (page 65)

Completion of the merger is conditioned on, among other things, the expiration or termination of the applicable waiting periods under the HSR Act, the receipt of any required approvals or the expiration or termination of any applicable waiting periods under Antitrust Laws of certain other specified jurisdictions, if applicable, and the absence of any law or order enacted, issued, promulgated, enforced or entered, whether temporary, preliminary or permanent, which is then in effect and has the effect of enjoining, restraining, prohibiting or otherwise preventing consummation of the Transactions.

Pursuant to the merger agreement, each party has agreed to use its reasonable best efforts to obtain all necessary actions or nonactions, consents, approvals and waivers from, and to give any necessary notices to, governmental authorities and to make all necessary registrations, declarations and filings (including filings that are required or advisable under the HSR Act and other registrations, declarations and filings with, or notices to, governmental authorities that may be required or advisable under other applicable antitrust, competition or pre-merger notification laws of any jurisdiction), if any.

On May 15, 2026, Thomas Foley filed a notification and report form pursuant to the HSR Act with the FTC and the DOJ with respect to his proposed acquisition of AIR common stock in connection with the merger. The applicable waiting period expired on June 15, 2026.

There can be no assurance that a challenge to the Transactions on antitrust grounds will not be made or, if such a challenge is made, what the result will be. The required regulatory and other approvals are discussed under the section entitled “The Merger Agreement — Covenants and Agreements — Reasonable Best Efforts; Further Action” beginning on page 80 of this proxy statement/prospectus.

No Solicitation by AIR (page 75)

The merger agreement provides that neither AIR nor any of its subsidiaries nor any of their respective representatives will, and that AIR will cause its subsidiaries and their respective representatives not to, directly or indirectly:

•        solicit, initiate, seek or take any other action to facilitate or encourage the making, submission or announcement of any proposal that constitutes, or could reasonably be expected to lead to any Competing AIR Proposal (as defined under “The Merger Agreement — Covenants and Agreements — No Solicitation by AIR”);

•        enter into, maintain, continue or participate in any discussions or negotiations with any person or entity in furtherance of, or furnish to any person any information or otherwise cooperate in any way with respect to, any Competing AIR Proposal;

•        agree to, approve, endorse, recommend or consummate any Competing AIR Proposal;

•        enter into, or propose to enter into, any contract or agreement which could reasonably be expected to lead to any Competing AIR Proposal (other than an acceptable confidentiality agreement); or

•        resolve, propose or agree, or authorize or permit any representative, to do any of the foregoing.

AIR is required to promptly (and in any event within 24 hours of receipt) advise Tenax orally and in writing of any Competing AIR Proposal or any inquiry relating to or that could reasonably be expected to lead to any Competing AIR Proposal, including the material terms and conditions of any such Competing AIR Proposal or inquiry and the identity of the person making any such Competing AIR Proposal or inquiry, to keep Tenax reasonably informed of the status and material details of any such Competing AIR Proposal or inquiry and provide Tenax, as soon as practicable after receipt or delivery thereof (and in any event within 24 hours of such receipt or delivery), copies of all correspondence and other written material versions of agreements relating to any such Competing AIR Proposal exchanged between AIR or any of its subsidiaries, on the one hand, and the person making the Competing AIR Proposal or inquiry (or its representatives), on the other hand.

Notwithstanding the above, AIR may, subject to compliance with the terms of the merger agreement, furnish information to, and enter into discussions with, a person who has made, after February 16, 2026, an unsolicited, written, bona fide Competing AIR Proposal, so long as such Competing AIR Proposal did not result from a breach of the merger agreement and prior to furnishing such information and entering into such discussions, the AIR Board:

•        reasonably determines, in its good faith judgment (after receiving the advice of a financial advisor of nationally recognized reputation and outside legal counsel qualified to practice in the State of Nevada and experienced in matters of Nevada corporate law) that such Competing AIR Proposal constitutes, or could reasonably be expected to lead to, a Superior Proposal (as defined under “The Merger Agreement — Covenants and Agreements — No Solicitation by AIR”) and the failure to furnish such information to, or enter into such discussions with, the person who made such Competing AIR Proposal would violate the AIR Board’s fiduciary duties under the NRS;

•        provides such information to Tenax (or provides such information to Tenax substantially concurrent with the time it is provided to such person); and

•        obtains from such person a confidentiality agreement that contains terms no less favorable to AIR than those contained in the existing confidentiality agreement between AIR and Tenax.

Change in the AIR Recommendation (page 76)

The AIR Board has recommended that the AIR stockholders vote in favor of approving the stock issuance proposal, the authorized shares proposal and the written consent proposal (the “AIR Recommendation”). The merger agreement provides that, subject to the exceptions described below, neither the AIR Board nor any committee thereof may make a Change in the AIR Recommendation (as defined under “The Merger Agreement — Covenants and Agreements — Change in the AIR Recommendation”).

Notwithstanding the foregoing, prior to the receipt of the requisite AIR stockholder approvals, the AIR Board may make a Change in the AIR Recommendation if, in response to the receipt of an unsolicited, written, bona fide Competing AIR Proposal received after February 16, 2026 or the occurrence of an Intervening Event (as defined under “The Merger Agreement — Covenants and Agreements — Change in the AIR Recommendation”), the AIR Board determines in its good-faith judgment (after having received the advice of a financial advisor of nationally recognized reputation and outside legal counsel qualified to practice in the State of Nevada and experienced in matters of Nevada corporate law) that its failure to make a Change in the AIR Recommendation would violate the fiduciary duties of the AIR Board under the NRS; provided, however, that no such action may be taken unless:

•        if the AIR Board is making a Change in the AIR Recommendation relating to a Competing AIR Proposal, such Competing AIR Proposal is a Superior Proposal;

•        AIR provides written notice to Tenax that the AIR Board intends to make a Change in the AIR Recommendation, specifies the reasons therefor, including a description of any Intervening Event in reasonable detail or the terms and conditions of any Superior Proposal, and includes an unredacted copy of any proposed agreement relating to such Superior Proposal;

•        AIR provides a period of five business days following Tenax’s receipt of such notice during which AIR will negotiate in good faith with Tenax regarding any revisions to the terms of the merger agreement proposed by Tenax (provided that any material change regarding such Intervening Event, or any amendments to the financial terms or any other material term of such Superior Proposal will require a new notice period of three business days); and

•        at the end of such notice period, the AIR Board again makes a determination in good faith after consultation with its outside legal counsel and financial advisors (and taking into account any adjustment or modification of the terms of the merger agreement proposed by Tenax) that the Competing AIR Proposal continues to be a Superior Proposal and that the Change in the AIR Recommendation is required to comply with the AIR Board’s fiduciary duties under the NRS.

No Solicitation by Tenax (page 78)

The merger agreement provides that neither Tenax nor any of its subsidiaries nor any of their respective representatives will, and that Tenax will cause its subsidiaries and their respective representatives not to, directly or indirectly:

•        solicit, initiate, seek or take any other action to facilitate or encourage the making, submission or announcement of any proposal that constitutes, or could reasonably be expected to lead to any Competing Tenax Proposal (as defined under “The Merger Agreement — Covenants and Agreements — No Solicitation by Tenax”);

•        enter into, maintain, continue or participate in any discussions or negotiations with any person or entity in furtherance of, or furnish to any person any information or otherwise cooperate in any way with respect to, any Competing Tenax Proposal;

•        agree to, approve, endorse, recommend or consummate any Competing Tenax Proposal;

•        enter into, or propose to enter into, any contract or agreement which could reasonably be expected to lead to any Competing Tenax Proposal (other than an acceptable confidentiality agreement); or

•        resolve, propose or agree, or authorize or permit any representative, to do any of the foregoing.

Tenax is required to promptly (and in any event within 24 hours of receipt) advise AIR orally and in writing of any Competing Tenax Proposal or any inquiry relating to or that could reasonably be expected to lead to any Competing Tenax Proposal, including the material terms and conditions of any such Competing Tenax Proposal or inquiry and the identity of the person making any such Competing Tenax Proposal or inquiry, to keep AIR reasonably informed of the status and material details of any such Competing Tenax Proposal or inquiry and provide AIR, as soon as practicable after receipt or delivery thereof (and in any event within 24 hours of such receipt or delivery), copies of all correspondence and other written material versions of agreements relating to any such Competing Tenax Proposal exchanged between Tenax or any of its subsidiaries, on the one hand, and the person making the Competing Tenax Proposal or inquiry (or its representatives), on the other hand.

Notwithstanding the above, Tenax may, subject to compliance with the terms of the merger agreement, furnish information to, and enter into discussions with, a person who has made, after February 16, 2026, an unsolicited, written, bona fide Competing Tenax Proposal, so long as such Competing Tenax Proposal did not result from a breach of the merger agreement and prior to furnishing such information and entering into such discussions, the board of managers of Tenax (the “Tenax Board”) obtains from such person a confidentiality agreement that contains terms no less favorable to Tenax than those contained in the existing confidentiality agreement between AIR and Tenax.

Conditions to Completion of the Merger (page 82)

As more fully described in this proxy statement/prospectus and in the merger agreement, the respective obligations of each party to consummate the merger are subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the effectiveness of the registration statement of which this proxy statement/prospectus forms a part, the absence of any stop order suspending that effectiveness issued by the SEC and the absence of any proceeding for that purpose pending before the SEC;

•        the receipt of approvals for the stock issuance proposal, the authorized shares proposal and the written consent proposal, in accordance with the NRS and AIR’s articles of incorporation and bylaws;

•        the absence of any law or order (a “Restraint”) enacted, issued, promulgated, enforced or entered, whether temporary, preliminary or permanent, which is then in effect and has the effect of enjoining, restraining, prohibiting or otherwise preventing the consummation of the Transactions;

•        the expiration or termination of any waiting period (and any extension thereof) applicable to the merger under the HSR Act and the receipt of any approval or the termination or expiration of any waiting period with respect to any applicable Antitrust Laws of certain other specified jurisdictions;

•        the authorization for listing on the NYSE American of the shares of AIR common stock issuable to the Tenax Members in connection with the merger, subject to official notice of issuance; and

•        the receipt of the approval of the merger by the holders of a majority in voting power of the issued and outstanding membership units of Tenax, which approval was obtained by the execution of the Tenax Member Support Agreement. Accordingly, this condition has been satisfied, and no meeting of the Tenax Members will be held. See the section entitled “Other Related Agreements — Tenax Member Support Agreement” beginning on page 89 of this proxy statement/prospectus.

The obligations of Tenax to consummate the merger are further subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the accuracy of the representations and warranties made in the merger agreement by AIR and Merger Sub as of February 16, 2026 and as of the closing date, subject to certain materiality thresholds;

•        performance or compliance in all material respects by AIR and Merger Sub with the agreements and covenants required by the merger agreement to be performed or complied with by them at or prior to the effective time;

•        the receipt by Tenax of a certificate, dated the closing date, signed by the Chief Executive Officer or Chief Financial Officer of AIR, certifying that the conditions in the preceding two bullet points are satisfied;

•        the absence, since February 16, 2026 through the closing date, of any event, occurrence, state of facts, development, circumstance, change or effect that, individually or in the aggregate, has had or would have been reasonably expected to have an AIR Material Adverse Effect (as defined under “The Merger Agreement — Representations and Warranties”);

•        the absence of any pending action by any governmental authority and the absence of any order or injunction by any governmental authority of competent jurisdiction which imposes or seeks to impose any limitations or restrictions on Tenax and its subsidiaries; and

•        the effectiveness at the effective time of the AIR Stockholder Support Agreement, pursuant to which such stockholders agreed to vote their shares of AIR common stock in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

The obligations of AIR and Merger Sub to consummate the merger are further subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the accuracy of the representations and warranties made in the merger agreement by Tenax as of February 16, 2026 and as of the closing date, subject to certain materiality thresholds;

•        performance or compliance in all material respects by Tenax with the agreements and covenants required by the merger agreement to be performed or complied with by it at or prior to the effective time;

•        the absence, since February 16, 2026 through the closing date, of any event, occurrence, state of facts, development, circumstance, change or effect that, individually or in the aggregate, has had or would have been reasonably expected to have a Tenax Material Adverse Effect (as defined under “The Merger Agreement — Representations and Warranties”); and

•        the receipt by AIR of a certificate, dated the closing date, signed by the President or Chief Financial Officer of Tenax, certifying that the conditions in the preceding two bullet points are satisfied.

Termination of the Merger Agreement (page 83)

The merger agreement may be terminated and the Transactions may be abandoned at any time before the effective time as follows:

•        by mutual written consent of Tenax and AIR, duly authorized by the Tenax Board and the AIR Board, respectively;

•        by either AIR or Tenax, following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal;

•        by either AIR or Tenax, if any Restraint that has the effect of enjoining, restraining, prohibiting or otherwise preventing the consummation of the Transactions has become final and non-appealable (provided that the party seeking to terminate the merger agreement pursuant to this bullet point has complied in all material respects with its covenants and agreements under the merger agreement regarding the use of efforts to consummate the Transactions);

•        by either AIR or Tenax, if the effective time has not occurred on or before the Outside Date (as defined under “The Merger Agreement — Termination of the Merger Agreement”) (provided that the right to terminate the merger agreement pursuant to this bullet point will not be available to (i) any party whose failure to fulfill any obligation under the merger agreement or intentional breach has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time; (ii) AIR if any AIR stockholder party to the AIR Stockholder Support Agreement (the “Key AIR Stockholders”) has materially breached its obligations under the AIR Stockholder Support Agreement and such breach has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time; or (iii) Tenax if any Tenax Member has materially breached its obligations under the Tenax Member Support Agreement and such breach has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time);

•        by Tenax, upon a breach by either of AIR or Merger Sub of, or a failure by AIR or Merger Sub to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by AIR or Merger Sub, as applicable, of written notice of such breach or failure (provided that Tenax will not have the right to terminate the merger agreement pursuant to this bullet point if Tenax is in material breach of its representations, warranties or covenants at the time of such termination);

•        by Tenax, if a Change in the AIR Recommendation shall have occurred;

•        by AIR, upon a breach by Tenax of, or a failure by Tenax to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by Tenax of written notice of such breach or failure (provided that AIR will not have the right to terminate the merger agreement pursuant to this bullet point if AIR is in material breach of its representations, warranties or covenants at the time of such termination);

•        by AIR, if Tenax fails to close the merger within three business days after all closing conditions have been satisfied or waived or AIR’s delivery of a written notice to Tenax that all of Tenax’s closing conditions have been satisfied or waived or that AIR is willing to waive any unsatisfied conditions; or

•        by AIR, to accept a Superior Proposal.

In addition, the merger agreement may be terminated by Tenax if the Key AIR Stockholders fail to duly execute and deliver, or cause to be delivered, to Tenax the AIR Stockholder Support Agreement within 72 hours following the execution and delivery of the merger agreement. The Key AIR Stockholders have delivered to Tenax the AIR Stockholder Support Agreement within 72 hours following the execution and delivery of the merger agreement.

In addition, the merger agreement may be terminated by AIR if the Tenax Members party to the Tenax Member Support Agreement fail to duly execute and deliver, or cause to be delivered, to AIR the Tenax Member Support Agreement within 72 hours following the execution and delivery of the merger agreement. The requisite Tenax Members have each delivered to AIR the Tenax Member Support Agreement within 72 hours following the execution and delivery of the merger agreement.

Expenses and Termination Fees (page 84)

Expenses

All expenses incurred in connection with the merger agreement and the Transactions will be paid by the party incurring such expenses, whether or not the merger or any other Transaction is consummated, except that expenses constituting the out-of-pocket cost of filing fees, printing and mailing of this proxy statement/prospectus (excluding, for the avoidance of doubt, the fees and expenses of AIR’s legal counsel) and the filing fees for the pre-merger notification and report forms under the HSR Act (excluding, for the avoidance of doubt, the fees and expenses of AIR’s legal counsel) will be paid by Tenax.

Termination Fees and Expense Reimbursement

The merger agreement requires AIR to pay Tenax an amount equal to $1,250,000 (the “AIR Termination Fee”) if:

•        AIR terminates the merger agreement to accept a Superior Proposal;

•        Tenax terminates the merger agreement following a Change in the AIR Recommendation; or

•        each of the following requirements are satisfied:

•        either AIR or Tenax terminates the merger agreement following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal; or AIR or Tenax terminates the merger agreement if the effective time has not occurred by 11:59 P.M., Eastern Time, on the Outside Date; or Tenax terminates the merger agreement upon a breach by AIR or Merger Sub of, or a failure by AIR or Merger Sub to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied by the Outside Date (provided that Tenax is not in material breach of any of its representations, warranties or covenants);

•        prior to such termination, a Competing AIR Proposal has been publicly announced or become publicly known; and

•        AIR enters into a definitive agreement in respect of such Competing AIR Proposal and such transaction is consummated within 12 months after such termination.

If either AIR or Tenax terminates the merger agreement following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal, AIR shall further reimburse Tenax for Tenax’s reasonable and documented out-of-pocket costs and expenses incurred in connection with the merger agreement and the Transactions, up to $500,000.

The merger agreement requires Tenax to pay AIR an amount equal to $1,250,000 (the “Tenax Termination Fee”) if:

•        AIR terminates the merger agreement upon a breach by Tenax of, or a failure by Tenax to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied by the Outside Date (provided that AIR is not in material breach of any of its representations, warranties or covenants);

•        AIR terminates the merger agreement following Tenax’s failure to close the merger within three business days after all closing conditions have been satisfied or waived or AIR’s delivery of a written notice to Tenax that all of Tenax’s closing conditions have been satisfied or waived or that AIR is willing to waive any unsatisfied conditions; or

•        Tenax terminates the merger agreement if the effective time has not occurred by 11:59 P.M., Eastern Time, on the Outside Date, and at such time AIR could have terminated the merger agreement due to either of the two circumstances listed above.

Other Related Agreements (page 87)

Redemption Rights Agreement

Prior to the closing, AIR will declare and issue, as a dividend to AIR stockholders as of the trading day immediately preceding the closing date, a right to cause AIR to redeem shares of AIR common stock that such AIR stockholders then own and continue to own on the first anniversary of the closing. The Redemption Rights will entitle the holders thereof to require AIR to purchase all or a portion of such AIR stockholder’s shares of AIR common stock for a redemption price, payable in cash, equal to 107.3% of the Debt Adjusted AIR Share Price, if the volume weighted average price of AIR common stock during the 20 trading days preceding the first anniversary of the closing is lower than 107.3% of the Debt Adjusted AIR Share Price. The Redemption Rights will not be transferable. See the section entitled “Other Related Agreements — Redemption Rights Agreement” beginning on page 87 of this proxy statement/prospectus.

Registration Rights Agreement

Prior to the closing, AIR, the Tenax Members, the Tenax Warrantholders and NTC Group, as Investors’ Representative, will enter into a registration rights agreement granting (i) Thomas Foley, Chairman of Tenax, and Taran Bakker, a director of Tenax, and certain of their respective affiliates customary demand rights and (ii) the Tenax Members piggyback registration rights, in each case for the resale of the shares of AIR common stock held by the Tenax Members. See the section entitled “Other Related Agreements — Registration Rights Agreement” beginning on page 88 of this proxy statement/prospectus.

Material Contracts Between AIR and Tenax (page 153)

Other than the merger agreement and the other transaction documents described in the section entitled “Other Related Agreements”, neither AIR nor any of its affiliates has been, is or is currently expected to be a party to any material contract or arrangement, or to have had any material relationship, with Tenax or any of its affiliates. See the sections entitled “Material Contracts Between AIR and Tenax” beginning on page 153 of this proxy statement/prospectus and “The Merger — Background of the Merger” beginning on page 39 of this proxy statement/prospectus.

Accounting Treatment (page 66)

The transaction is expected to be accounted for as a reverse acquisition under Financial Accounting Standards Board Accounting Standards Codification (“ASC”) Topic 805, “Business Combinations” (“Topic 805”), with Tenax deemed the accounting acquirer and AIR treated as the accounting acquiree for financial reporting purposes. See the section entitled “Unaudited Pro Forma Condensed Combined Financial Information — Accounting Treatment of the Merger” beginning on page 95 of this proxy statement/prospectus.

Financing of the Merger (page 38)

The merger agreement requires that, at the closing of the merger, Tenax fund the repayment of AIR’s net senior and subordinated debt, amounting in the aggregate to approximately $26.1 million as of August 31, 2026. On August 14, 2026, Tenax entered into an amendment to its credit agreement, among other things, to establish a new delayed draw term loan facility with aggregate commitments of $30,000,000 available through December 31, 2026, the proceeds of which may be used solely to finance the merger and to pay related fees, costs and expenses. See the section entitled “The Merger — Financing of the Merger” beginning on page 38 of this proxy statement/prospectus.

Reverse Stock Split (page 39)

As of the date of this proxy statement/prospectus, the trading price of AIR’s common stock on the NYSE American is less than $4.00 per share, and there is no assurance that it will not be below $4.00 per share at the effective time, meaning that the combined company would not satisfy the $4.00 minimum share price requirement for initial listing on the NYSE American under Section 101 of the NYSE American Company Guide. As a result, prior to the closing but, assuming the authorized shares proposal is approved at the special meeting, after the related amendment to the articles of incorporation of AIR becomes effective, AIR will file a certificate of change with the

Nevada Secretary of State to effect, pursuant to NRS 78.207, a reverse stock split of the issued and outstanding shares of AIR common stock at a ratio of one (1) post-split share of AIR common stock for every five (5) pre-split shares of AIR common stock, while simultaneously reducing the number of authorized shares of AIR common stock under the articles of incorporation of AIR by a corresponding factor, with any fractional share of AIR common stock otherwise resulting from the split rounded up to the nearest whole share. Pursuant to NRS 78.207, the AIR Board has the authority to effect such a reverse stock split without stockholder approval. See the sections entitled “The Merger — Reverse Stock Split” beginning on page 39 of this proxy statement/prospectus and “Risk Factors — Risks Relating to the Merger — If the combined company fails to comply with the initial listing requirements of the NYSE American, shares of AIR common stock could face possible delisting, which would result in, among other things, a limited public market for shares of AIR common stock and make obtaining future debt or equity financing more difficult for us.” beginning on page 23 of this proxy statement/prospectus.

Comparison of Rights of AIR Stockholders and Tenax Members (page 168)

AIR is incorporated under the laws of the State of Nevada, and the rights of the AIR stockholders are governed by the NRS, whereas Tenax is organized under the laws of the State of Delaware, and the rights of the Tenax Members are governed by the DLLCA. In addition, AIR stockholders and Tenax Members have different rights pursuant to the governing documents of each of AIR and Tenax. Accordingly, upon the completion of the merger, the Tenax Members will have different rights once they become stockholders of AIR because of the differences between these states of incorporation and formation and the governing documents of AIR and Tenax. See the section entitled “Comparison of Rights of AIR Stockholders and Tenax Members” beginning on page 168 of this proxy statement/prospectus.

No Dissenter’s Rights (page 184)

Pursuant to the NRS, there are no rights of dissent available to the stockholders of AIR in connection with the Transactions.

Material U.S. Federal Income Tax Consequences of the Transactions (page 91)

The Merger

Holders of AIR common stock will not recognize gain or loss for U.S. federal income tax purposes as a result of the merger.

The Redemption Rights

The U.S. federal income tax consequences of the receipt of Redemption Rights by a holder of AIR common stock are unclear. AIR intends to take the position that a holder’s receipt of the Redemption Rights constitutes an “open transaction”. Absent a change in law requiring otherwise after the date of the redemption rights agreement, AIR will not report the issuance of the Redemption Rights as a current distribution to such holder. This position may be challenged by the IRS, in which case a holder could be required to recognize taxable income in respect of the Redemption Rights without the corresponding receipt of cash.

The tax consequences of the Transactions to any particular holder of AIR common stock will depend on that holder’s facts and circumstances. Accordingly, all holders are urged to consult their own tax advisors regarding the tax consequences of the Transactions, including the effects of U.S. federal, state and local laws and non-U.S. tax laws.

Risk Factors (page 16)

In evaluating the merger agreement and the Transactions, you should carefully read this proxy statement/prospectus and the documents incorporated by reference herein and the annexes attached hereto. In particular, you should consider the factors discussed in the section entitled “Risk Factors” beginning on page 16 of this proxy statement/prospectus. The merger and the businesses of AIR and Tenax involve a number of risks. The following is a summary of some of these risks.

Risks Relating to the Merger

•        The closing of the merger is subject to many conditions, and if these conditions are not satisfied or waived, the merger will not be completed.

•        There can be no assurance that the conditions to the drawdown of the delayed draw loan commitment obtained by Tenax to finance the merger will be satisfied so as to enable Tenax to repay AIR’s net senior and subordinated debt in a timely manner or at all.

•        If we fail to consummate the merger, we may not be able to operate our business at current levels.

•        We and Tenax will be subject to certain operating restrictions until consummation of the merger and business uncertainties until and following the consummation of the merger.

•        Existing AIR stockholders will be substantially diluted in the merger and will have significantly reduced relative voting power and influence over AIR following the merger, and the resulting limited public float may adversely affect the liquidity and market price of AIR common stock.

•        The merger agreement contains restrictions on our ability to pursue other alternatives to the merger.

•        Completion of the merger may require consents or trigger change in control or other provisions in certain agreements to which AIR is a party.

•        The unaudited pro forma condensed combined financial statements and prospective financial information included in this proxy statement/prospectus are presented for illustrative purposes only and the actual financial condition and results of operations of the combined company following the merger may differ materially.

•        Because there is no public market for Tenax units, the valuation of Tenax is inherently uncertain.

•        The Redemption Rights may not provide AIR stockholders with the value or liquidity they may expect in connection with the merger.

Risks Relating to AIR Following the Merger

•        The market price for AIR common stock following the merger may be affected by factors different from those that historically have affected AIR common stock.

•        Combining AIR and Tenax may be more difficult, costly or time-consuming than expected, and the anticipated benefits and cost savings of the merger may not be realized.

•        AIR could lose key personnel or may be unable to recruit qualified personnel following the merger.

•        AIR is expected to incur substantial expenses related to the completion of the merger and the integration of AIR and Tenax.

•        The future results of AIR may be adversely affected if AIR does not effectively manage its expanded operations following the completion of the merger.

•        Following the merger, AIR will meet the requirements to be a “controlled company” and, as a result, will qualify for and, for so long as it so qualifies, intends to rely on exemptions from certain corporate governance standards. Immediately following the consummation of the merger, the combined company intends to rely on exemptions from the requirements that (1) director nominees be selected or recommended for selection by a majority of the independent directors or by a nominating committee composed solely of independent directors and (2) compensation of the chief executive officer be determined or recommended to the board of directors by a majority of its independent directors or by a compensation committee composed of independent directors.

•        Following the merger, AIR is expected to meet the requirements to be a “Smaller Reporting Company” within the meaning of the rules of the NYSE American and, as a result, will qualify for and, for so long as it so qualifies, intends to rely on exemptions from certain corporate governance standards. Immediately following the consummation of the merger, the combined company intends to rely on exemptions

allowing (1) an audit committee of at least two independent members (rather than three independent members), (2) a compensation committee that is not composed of independent directors and (3) selection of a compensation consultant, legal counsel or other adviser to the compensation committee without consideration of such adviser’s independence.

•        As a condition to consummation of the merger, unless waived by Tenax, AIR stockholders must approve the written consent proposal, thereby approving an amendment to AIR’s articles of incorporation to include a provision permitting AIR stockholders to act by written consent in lieu of a stockholder meeting under only certain limited circumstances.

•        If the combined company fails to comply with the initial or continued listing requirements of the NYSE American, shares of AIR common stock could face possible delisting, which would result in, among other things, a limited public market for shares of AIR common stock and make obtaining future debt or equity financing more difficult for us.

•        The issuance of a substantial number of shares of AIR common stock in the merger, and the potential resale of such shares following the merger, may negatively affect the market price of AIR common stock.

•        Following the completion of the merger, Thomas Foley will be AIR’s largest stockholder, owning, directly or indirectly, approximately 52% of the fully diluted shares of the AIR common stock, and will have the ability to exercise significant influence over decisions requiring approval of AIR stockholders.

Risks Relating to Tenax’s Business

•        Tenax depends on winning profitable business in competitive markets from U.S. government customers for a significant portion of its revenue.

•        Tenax derives a significant portion of its revenue from a concentrated number of large contracts, and the loss or material reduction of any of these contracts may adversely affect its business, financial condition, liquidity or results of operations.

•        Termination, expiration or non-renewal of Tenax’s existing U.S. government contracts may adversely affect its business.

•        A reduction in U.S. government funding, a change in U.S. government spending priorities or a U.S. government shutdown may adversely affect Tenax’s business, financial condition, liquidity or results of operations.

•        If Tenax fails to comply with laws and regulations governing federal contractors, Tenax could lose business and be liable for various penalties or sanctions.

•        Tenax depends on key personnel at NTC Group, and the loss of these key personnel could adversely affect Tenax’s operations, customer relationships and ability to execute its acquisition strategy.

•        Tenax operates in highly competitive markets, and competitive pressures may adversely affect it.

•        Tenax’s business could be negatively affected by cyber or other security threats or other disruptions.

•        Tenax’s operations depend on its aircraft and hangars, and damage to, or disruption affecting, those assets could materially adversely affect its business, financial condition or results of operations.

•        Restrictive and financial covenants in the documents governing Tenax’s existing and any future indebtedness may limit its current and future operations, particularly Tenax’s ability to respond to changes in its business or to pursue its business strategies.

For a more complete discussion of these and other risks, please see the section entitled “Risk Factors” beginning on page 16 of this proxy statement/prospectus.

RISK FACTORS

Before you vote, you should carefully consider the risks described in the section entitled “Cautionary Statement Regarding Forward-Looking Statements” beginning on page 32 of this proxy statement/prospectus and the other information contained in this proxy statement/prospectus, particularly the risk factors discussed in this section of this proxy statement/prospectus entitled “Risk Factors”. See the section entitled “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus. In addition to the risks set forth below, new risks may emerge from time to time, and it is not possible to predict all risk factors, nor can AIR or Tenax assess the impact of all factors on the merger and AIR following the merger or the extent to which any factor or combination of factors may cause actual results to differ materially from those contained in or implied by any forward-looking statements.

Risks Relating to the Merger

The closing of the merger is subject to many conditions, and if these conditions are not satisfied or waived, the merger will not be completed.

The closing of the merger is subject to a number of conditions as set forth in the merger agreement that must be satisfied or waived, including the effectiveness of the registration statement on Form S-4 of which this proxy statement/prospectus forms a part and the absence of any stop order suspending that effectiveness or proceeding for that purpose, the approval by the AIR stockholders of the stock issuance proposal, the authorized shares proposal and the written consent proposal, the absence of any law or injunction prohibiting the consummation of the merger, the authorization of the listing on the NYSE American of the shares of AIR common stock to be issued in the merger and the receipt of regulatory approvals.

The closing of the merger is also subject to the satisfaction or waiver of a number of other conditions, including, among others, the accuracy of representations and warranties in the merger agreement (subject to certain materiality qualifiers, other customary exceptions and customary cure rights), the performance in all material respects by us and Tenax of our respective obligations under the merger agreement, including satisfaction of AIR’s net senior and subordinated debt, the absence of a material adverse effect on Tenax or us and the receipt by us and Tenax of officer certificates signed on behalf of Tenax, with respect to the certificate to be received by us, and signed on behalf of us and Merger Sub, with respect to the certificate to be received by Tenax, certifying the satisfaction of the preceding conditions.

For a more complete summary of the conditions that must be satisfied or waived prior to completion of the merger, see the section entitled “The Merger Agreement — Conditions to Completion of the Merger” beginning on page 82 of this proxy statement/prospectus.

There can be no assurance as to whether or when the conditions to the closing of the merger will be satisfied or waived or as to whether or when the merger will be consummated.

There can be no assurance that Tenax will be able to draw down on the delayed draw loan commitment obtained as part of the refinancing of its TAH First Lien Credit Agreement.

The obligation of Tenax to consummate the merger, including satisfaction of the conditions to repay AIR’s net senior and subordinated debt, is not conditioned upon obtaining financing. On August 14, 2026, Tenax completed a refinancing of its TAH First Lien Credit Agreement (as defined under “The Merger — Financing of the Merger”). This included $30 million of delayed draw term loan commitments available in connection with the consummation of the merger. The ability of Tenax to draw down on the $30 million delayed draw loan commitment is subject to certain conditions contained in the TAH First Lien Credit Agreement. If Tenax were to complete the merger without satisfying AIR’s net senior indebtedness and subordinated debt, this could reasonably be expected to result in events of default under Tenax’s or AIR’s existing credit agreements, which could have a material adverse effect on the combined company. See the section entitled “The Merger — Financing of the Merger” beginning on page 38 of this proxy statement/prospectus.

The termination of the merger agreement could negatively affect us.

The merger agreement may be terminated at any time prior to the effective time, (i) by mutual written consent of Tenax and AIR, duly authorized by the Tenax Board and the AIR Board, respectively; (ii) by either AIR or Tenax, following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance

proposal, the authorized shares proposal and the written consent proposal; (iii) by either AIR or Tenax, if any Restraint that has the effect of enjoining, restraining, prohibiting or otherwise preventing the consummation of the Transactions has become final and nonappealable (provided that the party seeking to terminate the merger agreement for this reason has complied in all material respects with its covenants and agreements under the merger agreement regarding the use of efforts to consummate the Transactions); (iv) by either AIR or Tenax, if the effective time has not occurred on or before the Outside Date (provided that the right to terminate the merger agreement for this reason will not be available to (a) any party whose failure to fulfill any obligation under the merger agreement or intentional breach has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time, (b) AIR if any Key AIR Stockholder’s material breach of its obligations under the AIR Stockholder Support Agreement has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time or (c) Tenax if any Tenax Member’s material breach of its obligations under the Tenax Member Support Agreement has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time); (v) by Tenax, upon a breach by either of AIR or Merger Sub of, or a failure by AIR or Merger Sub to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by AIR or Merger Sub, as applicable, of written notice of such breach or failure (provided that Tenax will not have the right to terminate the merger agreement pursuant to this clause if Tenax is in material breach of its representations, warranties or covenants at the time of such termination); (vi) by Tenax, if a Change in the AIR Recommendation shall have occurred; (vii) by AIR, upon a breach by Tenax of, or a failure by Tenax to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by Tenax of written notice of such breach or failure (provided that AIR will not have the right to terminate the merger agreement pursuant to this clause if AIR is in material breach of its representations, warranties or covenants at the time of such termination); (viii) by AIR, if Tenax fails to close the merger within three business days after all closing conditions have been satisfied or waived or AIR’s delivery of a written notice to Tenax that all of Tenax’s closing conditions have been satisfied or waived or that AIR is willing to waive any unsatisfied conditions; or (ix) by AIR, to accept a Superior Proposal.

If the merger agreement is terminated for any reason, our ongoing business may be adversely affected and, without realizing any of the anticipated benefits of having completed the Transactions, we would be subject to a number of risks, including the following:

•        the market price of AIR common stock could decline;

•        if the merger agreement is terminated and the AIR Board seeks another business combination, our stockholders cannot be certain that we will be able to find a party willing to enter into a transaction on terms equivalent to or more attractive than the terms that Tenax has agreed to in the merger agreement;

•        time and resources, financial and other, committed by our management to matters relating to the Transactions could otherwise have been devoted to pursuing other beneficial opportunities for our company;

•        we may experience negative reactions from the financial markets or from our customers, suppliers or employees; and

•        we may be required to pay our respective costs relating to the Transactions, including legal, accounting, financial advisory, financing and printing fees, whether or not the Transactions are completed.

If the merger agreement is terminated, under specified circumstances, we may be required to pay Tenax a termination fee of $1.25 million. See the section entitled “The Merger Agreement — Expenses and Termination Fees” beginning on page 84 of this proxy statement/prospectus for a more complete discussion of the circumstances under which the merger agreement could be terminated.

In addition, if the merger is not completed, we could be subject to litigation related to any failure to complete the merger or related to any enforcement proceeding commenced against us to perform our obligations under the merger agreement. The materialization of any of these risks could materially and adversely affect our ongoing business.

If we fail to consummate the merger, we may not be able to operate our business at current levels.

Unless the merger is consummated, we may not be able to continue to operate our business at current levels unless we are able to generate substantial revenues and become profitable and/or obtain substantial additional financing from a conventional bank lender or other financial institution to replace our credit facility with Webster Bank (the “Current Credit Facility”) and subordinated debt. Webster Bank recently agreed to extend the maturity date of the Current Credit Facility to November 30, 2026, and the holders of our subordinated debt agreed to extend the maturity date of their loans until December 1, 2026. Nevertheless, Webster Bank has advised us that it does not intend to renew the Current Credit Facility and the holders of our subordinated debt have indicated that they do not intend to renew the subordinated debt beyond the current maturity dates. There can be no assurance that in the absence of the merger that AIR would be able to obtain such financing or refinancing on acceptable terms or at all, or that AIR would be able to generate sufficient revenues to service its existing indebtedness and fund its operations on a standalone basis.

We and Tenax will be subject to certain operating restrictions until consummation of the merger and business uncertainties until and following the consummation of the merger.

Uncertainty about the effect of the merger on employees and customers may have an adverse effect on us, Tenax or the combined company following the merger. These uncertainties could disrupt our business or the business of Tenax and cause customers, suppliers, vendors, partners and others that deal with us and Tenax to defer entering into contracts with us and Tenax or making other decisions concerning us and Tenax or seek to change or cancel existing business relationships with us and Tenax. Retention and motivation of certain employees may be challenging during the pendency of the merger due to uncertainty about their future roles and difficulty of integration. If key employees depart because of issues related to the uncertainty and difficulty of integration or a desire not to remain with AIR following the merger, AIR’s business following the merger could be negatively affected. In addition, the merger agreement restricts AIR and Tenax from making certain acquisitions and investments and imposes certain other restrictions on the conduct of each party’s business until the merger occurs without the consent of the other party. These restrictions may negatively affect each party’s business and operations or prevent either party from pursuing attractive business opportunities that may arise prior to the completion of the merger which may reduce the profitability of AIR following the merger. See the sections entitled “The Merger Agreement — Other Covenants and Agreements — Conduct of Business of AIR Prior to Completion of the Merger” beginning on page 71 of this proxy statement/prospectus and “The Merger Agreement — Other Covenants and Agreements — Conduct of Business of Tenax Prior to Completion of the Merger” beginning on page 74 of this proxy statement/prospectus for descriptions of the restrictive covenants to which each of AIR and Tenax is subject.

Existing AIR stockholders will be substantially diluted in the merger and will have significantly reduced relative voting power and influence over AIR following the merger, and the resulting limited public float may adversely affect the liquidity and market price of AIR common stock.

If the merger is completed, the existing AIR stockholders as of immediately prior to the effective time will collectively own approximately 4% of the outstanding shares of AIR common stock, on a fully diluted basis, and the Tenax Members and Tenax Warrantholders will collectively own approximately 96% of the outstanding shares of AIR common stock, on a fully diluted basis. As a result, existing AIR stockholders will experience substantial dilution and will own only a minority interest in AIR following the merger.

In addition, following the consummation of the merger, the composition of the AIR Board will change significantly. The AIR Board will consist of no fewer than eight directors, of which no fewer than six will be designated by Tenax and two of which will be mutually agreed upon by Tenax and AIR. As a result, existing AIR stockholders will have significantly less influence over the management, business, operations, strategy and policies of AIR following the merger than they currently have.

This significant reduction in relative ownership and voting power may cause existing AIR stockholders to have interests that differ from those of the Tenax Members and may limit the ability of existing AIR stockholders to influence significant corporate decisions following the merger.

Although the amended and restated merger agreement will help facilitate the satisfaction of the NYSE American minimum listing requirement related to public float, AIR’s unrestricted public float held by non-insiders (as determined for purposes of determining compliance with the NYSE American’s listing requirements) is expected

to represent less than one-quarter of the outstanding shares of AIR common stock following the merger. Such limited public float may adversely affect the liquidity and trading price of AIR common stock, AIR’s ability to satisfy NYSE American continued listing requirements and AIR’s ability to raise capital in the public markets or attract institutional investor interest in the combined company.

The merger agreement contains restrictions on our ability to pursue other alternatives to the merger.

The merger agreement contains non-solicitation provisions that, subject to limited exceptions, restrict our and our subsidiaries’ ability to, directly or indirectly, initiate, solicit, encourage, induce or assist any inquiries or the making, submission, announcement or consummation of, proposals or offers that constitute or could reasonably be expected to lead to any Competing AIR Proposal. Further, subject to limited exceptions, consistent with applicable law, the merger agreement provides that the AIR Board will not withhold, withdraw, qualify or modify (or publicly propose or resolve to withhold, withdraw, qualify or modify) in a manner adverse to Tenax its recommendation that the AIR stockholders vote in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal. Although the AIR Board is permitted to take certain actions in response to a Superior Proposal or an Intervening Event if (subject to compliance with the provisions of the merger agreement) it determines in good faith (after consultation with AIR’s outside legal counsel) that the failure to do so would reasonably be expected to violate its fiduciary duties under applicable law, doing so in specified situations could require us to pay to Tenax a termination fee of $1.25 million. See the sections entitled “The Merger Agreement — Other Covenants and Agreements — No Solicitation by AIR”, “The Merger Agreement — Other Covenants and Agreements — Change in the AIR Recommendation” and “The Merger Agreement — Expenses and Termination Fees” beginning on pages 75, 76 and 84, respectively, of this proxy statement/prospectus for a more complete discussion of these restrictions and consequences.

Such provisions could discourage a potential acquiror that might have an interest in making a proposal from considering or proposing any such transaction. There also is a risk that the requirement to pay the AIR Termination Fee or expense reimbursement payment to Tenax in certain circumstances may result in a potential acquiror proposing to pay a lower per share price to acquire us than it might otherwise have proposed to pay.

Completion of the merger may require consents or trigger change in control or other provisions in certain agreements to which AIR is a party.

The completion of the Transactions may require consents or trigger change in control or other provisions in certain agreements to which AIR is a party. If Tenax and AIR are unable to obtain consents or negotiate waivers of those provisions, the counterparties may exercise their rights and remedies under the agreements, potentially terminating the agreements, discontinuing business relationships or seeking monetary damages. Even if Tenax and AIR are able to obtain consents or negotiate waivers, the counterparties may require a fee for such waivers or seek to renegotiate the agreements on terms less favorable to AIR. Such action could cause AIR to lose business, increase the cost of doing business and/or lower profitability or have other adverse financial impacts.

The unaudited pro forma condensed combined financial statements and prospective financial information included in this proxy statement/prospectus are presented for illustrative purposes only and the actual financial condition and results of operations of the combined company following the merger may differ materially.

The unaudited pro forma condensed combined financial statements and prospective financial information contained in this proxy statement/prospectus are presented for illustrative purposes only; are based on various adjustments, assumptions and preliminary estimates; and do not represent the actual financial condition or results of operations of AIR and Tenax prior to the merger and may not be an indication of financial condition or results of operations of the combined company following the merger for several reasons. The actual financial condition and results of operations of AIR and Tenax prior to the merger and those of the combined company following the merger may not be consistent with, or evident from, these unaudited pro forma condensed combined financial statements and prospective financial information. In addition, the assumptions used in preparing the unaudited pro forma condensed combined financial statements and prospective financial information may not be realized, and other factors may affect AIR’s and Tenax’s respective financial condition or results of operations prior to the merger and the combined company’s financial condition or results of operations following the merger. Furthermore, following the merger, AIR will conduct a review of its accounting policies in an effort to determine if differences in accounting policies require restatement or reclassification of results of operations or reclassification of assets or liabilities to conform to Tenax’s accounting policies and classifications. As a result of that review, the combined

company may identify differences among the accounting policies of the companies that, when conformed, could have a material impact on the unaudited pro forma condensed combined financial statements contained in this proxy statement/prospectus. Any potential decline in AIR’s, Tenax’s or the combined company’s financial condition or results of operations may cause significant variations in the pro forma financial statements and AIR’s stock price following the closing of the merger.

We may waive one or more of the conditions to the merger without resoliciting stockholder approval.

We may determine to waive, in whole or in part, one or more of the conditions to our obligations to complete the merger, to the extent permitted by applicable laws. We will evaluate the materiality of any such waiver and its effect on the AIR stockholders in light of the facts and circumstances at the time to determine whether any amendment of this proxy statement/prospectus and resolicitation of proxies is required or warranted. In some cases, if the AIR Board determines that such a waiver is warranted but that such waiver or its effect on the AIR stockholders is not sufficiently material to warrant resolicitation of proxies, we have the discretion to complete the merger without seeking further stockholder approval. Any determination whether to waive any condition to the merger or as to resoliciting stockholder approval or amending this proxy statement/prospectus as a result of a waiver will be made by us at the time of such waiver based on the facts and circumstances as they exist at that time.

If our due diligence investigation of Tenax was inadequate or if unexpected risks related to Tenax’s business materialize, it could have a material adverse effect on our stockholders’ investment.

Even though we conducted a due diligence investigation of Tenax, we cannot be sure that our diligence surfaced all material issues that may be present inside Tenax or its business, or that it would be possible to uncover all material issues through a customary amount of due diligence, or that factors outside of Tenax and its business and outside of its control will not arise later. If any such material issues arise, they may materially and adversely affect the ongoing business of AIR and our stockholders’ investment.

Because there is no public market for Tenax units, the valuation of Tenax is inherently uncertain.

The outstanding membership interests of Tenax are privately held and are not traded in any public market. As a result, the value of Tenax is inherently uncertain and difficult to determine. Because Tenax units are not publicly traded and there is no established market price for Tenax, the value of the shares of AIR common stock to be issued to the Tenax Members as the merger consideration may ultimately be greater than or less than the value that might be ascribed to Tenax in a public market as of the effective time. As a result, the merger consideration may not reflect the value that investors or analysts might independently assign to Tenax.

The Redemption Rights may not provide AIR stockholders with the value or liquidity they may expect in connection with the merger.

AIR stockholders will not receive merger consideration directly in the merger. Instead, AIR has agreed to, prior to the closing, issue Redemption Rights that may become exercisable on the first anniversary of the closing under specified conditions. This arrangement is subject to significant limitations, including timing conditions and price-based triggers. Accordingly, AIR stockholders may not be able to realize value through the Redemption Rights, or may do so only on a delayed basis, and the Redemption Rights may not fully offset the dilution resulting from the merger.

Risks Relating to AIR Following the Merger

The market price for AIR common stock following the merger may be affected by factors different from those that historically have affected AIR common stock.

Following the merger, AIR’s business will include operations of Tenax that differ from AIR’s operations prior to the merger, and accordingly the results of operations of AIR following the merger will be affected by some factors that are different from those currently affecting our results of operations. This proxy statement/prospectus describes the business of Tenax and also describes important factors to consider in connection with that business and the business of AIR following the merger. For a discussion of these matters, see, for example, the sections entitled “Description of Tenax Business”, “Tenax Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Unaudited Pro Forma Condensed Combined Financial Information” beginning on pages 128, 136 and 95, respectively, in this proxy statement/prospectus.

Combining AIR and Tenax may be more difficult, costly or time-consuming than expected, and the anticipated benefits and cost savings of the merger may not be realized.

We and Tenax have operated and, until the completion of the merger, will continue to operate independently. The success of the merger, including anticipated benefits and cost savings, will depend, in part, on our ability to successfully combine and integrate our business with the business of Tenax.

The merger will involve the integration of Tenax’s business with our existing business, which is a complex, costly and time-consuming process. It is possible that the pendency of the merger and/or the integration process could result in material challenges, including, without limitation:

•        the diversion of management’s attention from ongoing business concerns and performance shortfalls at one or both of the companies as a result of the devotion of management’s attention to the merger;

•        managing a larger combined company;

•        the transition of management from AIR’s executive management team to Tenax’s executive management team;

•        maintaining employee morale and retaining key management and other employees;

•        the possibility of faulty assumptions underlying expectations regarding the integration process;

•        retaining existing business and operational relationships and attracting new business and operational relationships;

•        consolidating corporate and administrative infrastructures and eliminating duplicative operations and inconsistencies in standards, controls, procedures and policies;

•        integrating the companies’ financial reporting and internal control systems, including compliance by the combined company with Section 404 of the Sarbanes-Oxley Act of 2002, as amended, and the rules promulgated thereunder by the SEC;

•        adapting Tenax’s management team and operational infrastructure to the reporting, disclosure and governance obligations applicable to SEC reporting companies, including under the Exchange Act, the Sarbanes-Oxley Act and the NYSE American listing requirements, to which Tenax has not previously been subject;

•        remediating AIR’s existing material weakness in internal controls over financial reporting, which has remained unremediated since 2022, while simultaneously integrating Tenax’s financial reporting and control systems, which have not previously been subject to the requirements applicable to SEC reporting companies;

•        coordinating geographically separate organizations;

•        maintaining and protecting the competitive advantages of each of AIR and Tenax, including the trade secrets, know-how and intellectual property related to their respective production processes;

•        unanticipated issues in integrating information technology, communications and other systems; and

•        unforeseen expenses or delays associated with the merger.

Many of these factors will be outside of the combined company’s control, and any one of them could result in delays, increased costs, decreases in revenues and diversion of management’s time and energy, which could materially affect the combined company’s financial position, results of operations and cash flows following the merger.

If we or Tenax experience difficulties with the integration process, the anticipated benefits of the merger may not be realized fully or at all, or may take longer to realize than expected. These integration matters could have an adverse effect on (i) each of AIR and Tenax during this transition period and (ii) the combined company for an undetermined period after completion of the merger. In addition, the actual cost savings of the merger could be less than anticipated.

AIR could lose key personnel or may be unable to recruit qualified personnel following the merger.

AIR’s future success depends upon the continued contributions of our senior management and other key personnel and the ability to retain and motivate them. If we are unable to retain and motivate the senior management team and other key personnel sufficiently to maintain our current business and, following the merger, support the projected growth and initiatives of the combined business, our respective business and financial performance may be adversely affected.

The future results of AIR may be adversely affected if AIR does not effectively manage its expanded operations following the completion of the merger.

Following the completion of the merger, the size of AIR’s business will be significantly larger than the current size of either our or Tenax’s respective businesses. AIR’s ability to successfully manage this expanded business will depend, in part, upon management’s ability to design and implement strategic initiatives that address not only the integration of two discrete companies, but also the increased scale and scope of the combined business with its associated increased costs and complexity. There can be no assurances that the combined company will be successful or that it will realize the expected operating efficiencies, cost savings and other benefits currently anticipated from the merger.

AIR is expected to incur substantial expenses related to the completion of the merger and the integration of AIR and Tenax.

We and Tenax have incurred, and expect to continue to incur, a number of nonrecurring costs associated with the merger and combining the operations of the two companies. The substantial majority of nonrecurring expenses will be composed of transaction and regulatory costs related to the merger. AIR also will incur transaction fees and costs related to formulating and implementing integration plans, including facilities and systems consolidation costs and employment-related costs. We and Tenax continue to assess the magnitude of these costs, and additional unanticipated costs may be incurred in the merger and the integration of the two companies’ businesses.

Following the merger, the composition of the AIR Board will be different than the composition of the current AIR Board.

Upon consummation of the merger, the composition of the AIR Board will be different than the current AIR Board. The AIR Board currently consists of six directors. Upon the consummation of the merger, the AIR Board will consist of no fewer than eight directors:

•        no fewer than six individuals will be designated by Tenax; and

•        two individuals will be mutually agreed upon by Tenax and AIR.

This new composition of AIR Board may affect the future decisions of AIR.

Following the merger, AIR will meet the requirements to be a “controlled company” within the meaning of the rules of the NYSE American and, as a result, will qualify for and, for so long as it so qualifies, intends to rely on exemptions from certain corporate governance standards, which limit the presence of independent directors on its board of directors or board committees.

Following the merger, approximately 96% of the outstanding shares of AIR common stock will be held by the Tenax Members and Tenax Warrantholders, on a fully diluted basis, and approximately 4% will be held by the current AIR stockholders, on a fully diluted basis. Thomas Foley will own, directly or indirectly, approximately 52% of the fully diluted shares of AIR common stock.

As a result, AIR will be a “controlled company” for purposes of Section 801(a) of the NYSE American Company Guide and will be exempt from certain governance requirements otherwise required by the NYSE American. Under Section 801(a), a company in which over 50% of the voting power is held by an individual, a group or another company is a “controlled company” and is exempt from certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions from the requirements that (1) director nominees be selected or recommended for selection by a majority of the independent directors or by a nominating committee composed solely of independent directors and (2) compensation

of the chief executive officer be determined or recommended to the board of directors by a majority of its independent directors or by a compensation committee composed of independent directors. AIR does not intend to rely on the exemption from the requirement that a majority of AIR’s board of directors consist of independent directors. In addition, following the consummation of the merger, AIR will continue to have an Audit Committee that is composed entirely of independent directors.

As a result, the procedures for approving significant corporate decisions could be determined by directors who have a direct or indirect interest in such decisions, and the AIR stockholders will not have the same protections afforded to stockholders of other companies that are required to comply with the independence rules of the NYSE American.

Following the merger, AIR is expected to meet the requirements to be a “Smaller Reporting Company” within the meaning of the rules of the NYSE American and, as a result, is expected to qualify for and, if and for so long as it so qualifies, intends to rely on exemptions from certain corporate governance standards, which limit the presence of independent directors on its board of directors or board committees and the presence of an independent compensation consultant.

AIR is expected to qualify as a “Smaller Reporting Company” for purposes of Section 801(h) of the NYSE American Company Guide and will be exempt from certain governance requirements otherwise required by the NYSE American. Under Section 801(h), a company that satisfies the definition of smaller reporting company in Rule 12b-2 of the Exchange Act, meaning it is an issuer that is not an investment company, an asset-backed issuer or a majority-owned subsidiary of a parent that is not a smaller reporting company and that (1) has a public float of less than $250 million or (2) has annual revenues of less than $100 million and either (i) no public float or (ii) a public float of less than $700 million, is a “Smaller Reporting Company”. Smaller Reporting Companies are exempt from certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions allowing (1) an audit committee of at least two independent members (rather than three independent members), (2) a compensation committee that is not composed of independent directors and (3) selection of a compensation consultant, legal counsel or other adviser to the compensation committee without consideration of such adviser’s independence. AIR does not intend to rely on the exemption allowing a board of directors composed of at least 50% independent directors (rather than a majority of independent directors).

As a result, the procedures for approving significant corporate decisions could be determined by directors who have a direct or indirect interest in such decisions, and the AIR stockholders will not have the same protections afforded to stockholders of other companies that are required to comply with the independence rules of the NYSE American.

As a condition to consummation of the merger, unless waived by Tenax, AIR stockholders must adopt a provision permitting AIR stockholders to act by written consent in lieu of a stockholder meeting under only certain limited circumstances.

Under AIR’s existing articles of incorporation and bylaws, AIR stockholders are currently not permitted to take stockholder action by written consent in lieu of a stockholder meeting. As a condition to completion of the merger, unless waived by Tenax, the AIR stockholders must approve the written consent proposal, thereby approving an amendment to AIR’s articles of incorporation to authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock. At any time when NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively do not beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock, any action required to be taken or permitted to be taken by stockholders of AIR may be effected only at a duly called annual or special meeting of stockholders and may not be taken by written consent. A reinstatement of a prohibition on stockholder action by written consent at any time when NTC Group, Thomas Foley and Taran Bakker and their respective affiliates no longer collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock may be considered an anti-takeover measure by forcing a potential acquirer to take control of AIR only at a duly called special or annual meeting.

If the combined company fails to comply with the initial listing requirements of the NYSE American, shares of AIR common stock could face possible delisting, which would result in, among other things, a limited public market for shares of AIR common stock and make obtaining future debt or equity financing more difficult for us.

Under Section 341 of the NYSE American Company Guide, if a listed issuer engages in a reverse merger, it will be eligible for continued listing on the NYSE American only if the post-transaction entity meets the standards for initial listing. Companies listed on the NYSE American are subject to initial listing standards that require, among other things, a minimum share price of $4.00 per share and an aggregate market value of unrestricted publicly held shares of at least $15 million. As of the date of this proxy statement/prospectus, the trading price of AIR’s common stock on the NYSE American is less than $4.00 per share, and there is no assurance that it will not be below $4.00 per share at the effective time, meaning the combined company would fail to meet the standards for initial listing on the NYSE American.

Assuming the authorized shares proposal is approved at the special meeting and after the related amendment to the articles of incorporation of AIR becomes effective, AIR intends to effect the reverse stock split prior to the closing of the merger in order to satisfy the $4.00 minimum share price requirement for initial listing on the NYSE American under Section 101 of the NYSE American Company Guide. While the reverse stock split is intended to increase the per share price of AIR common stock above the $4.00 threshold, there can be no assurance that the market price of AIR common stock will be at or above $4.00, at the closing of the merger or for any sustained period thereafter. The market price of AIR common stock and the resulting market value of unrestricted publicly held shares depends on many factors unrelated to the number of shares outstanding, including our operating results, financial condition, prospects and general market and economic conditions. Additionally, reverse stock splits are often viewed negatively by investors and may result in reduced trading volume and liquidity in AIR common stock.

If AIR common stock fails to satisfy the NYSE American initial listing requirements (or, subsequent to the merger, the continued listing requirements), AIR common stock could be delisted from the NYSE American. If AIR common stock is delisted, it would likely trade on the over-the-counter market, which could significantly reduce the liquidity and market price of AIR common stock, limit the combined company’s ability to raise additional capital through equity issuances, result in a loss of confidence by investors, employees and business partners and make AIR common stock subject to “penny stock” rules, which would impose additional burdens on broker-dealers and further restrict secondary market trading in AIR common stock. Any such delisting could have a material adverse effect on the combined company’s business, financial condition and results of operations.

The issuance of a substantial number of shares of AIR common stock in the merger, and the potential resale of such shares following the merger, may negatively affect the market price of AIR common stock.

In the merger, AIR will issue a substantial number of shares of AIR common stock to the Tenax Members, who, combined with the Tenax Warrantholders, are expected to own approximately 96% of the outstanding shares of AIR common stock following the merger, on a fully diluted basis. In addition, the registration rights agreement will grant certain Tenax Members demand registration rights for the resale of shares of AIR common stock held by them. See the section entitled “Other Related Agreements — Registration Rights Agreement” beginning on page 88 of this proxy statement/prospectus. The market price of AIR common stock could decline as a result of sales of a large number of shares of AIR common stock in the market after the exercise of such registration rights, or even the perception that these sales could occur.

Following the completion of the merger, Thomas Foley will be AIR’s largest stockholder, owning, directly or indirectly, approximately 52% of the fully diluted shares of the AIR common stock, and will have the ability to exercise significant influence over decisions requiring the AIR stockholders’ approval.

AIR will be controlled by Thomas Foley following the completion of the merger. Mr. Foley will own, directly or indirectly, approximately 52% of the fully diluted shares of the AIR common stock. As a result, Mr. Foley will have the ability to exercise significant influence over decisions requiring approval of the AIR stockholders, including the election of directors, amendments to AIR’s articles of incorporation and approval of significant corporate transactions, such as a merger or other sale of AIR or its assets.

This concentration of ownership may have the effect of delaying, preventing or deterring a change in control of AIR and may negatively affect the market price of AIR’s common stock. Also, Thomas Foley and his affiliated entities are in the business of making investments in companies and may from time to time acquire and hold interests in businesses that compete with AIR. Mr. Foley or his affiliates may also pursue acquisition opportunities that are complementary to AIR’s business and, as a result, those acquisition opportunities may not be available to AIR.

Risks Relating to Tenax’s Business

Tenax depends on winning profitable business in competitive markets from U.S. government customers for a significant portion of its revenue.

Tenax derives a substantial portion of its revenue from contracts with the U.S. government, the most significant of which are typically awarded through a rigorous competitive bidding process. This competitive bidding process presents several risks, including the following:

•        Tenax may bid on programs for which the work activities, deliverables and timelines are vague or for which the solicitation incompletely describes the actual work, which may result in inaccurate pricing assumptions;

•        Tenax may incur substantial costs and spend a significant amount of managerial time and effort preparing bids and proposals with no guarantee of winning new business; and

•        Tenax may realize the lost opportunity cost of not bidding on and winning other contracts that it may have pursued otherwise.

Reductions in the number and amounts of new awards, delays in the timing of anticipated awards or potential cancellations of such awards as a result of government appropriations or funding priorities, economic conditions, geopolitical pressures, material and equipment pricing and availability or other factors could adversely affect Tenax’s long-term financial results.

Following contract award, Tenax may also encounter significant expense associated with transitioning to a new contract, delay, contract modifications or the contract may be protested. Any project delays, cancellations, contract modifications or protests may adversely affect its business, financial condition, liquidity or results of operations.

In addition, Tenax faces rigorous competition and pricing pressures for any additional contract awards from the U.S. government. Many of Tenax’s existing contracts must be recompeted when the original period of performance ends. Recompetes represent opportunities for competitors to take business away from Tenax. Recompetes also represent opportunities for Tenax’s customers to obtain more favorable terms from Tenax that may present finance and performance risk. Tenax may be required to qualify or continue to qualify under multiple award contracts, and it may be more difficult for Tenax to pursue or win future task orders. If Tenax is unable to consistently win new contract awards, or successfully win recompetes for its existing contracts, Tenax’s business and prospects will be adversely affected, and its actual results may differ materially and adversely from those anticipated.

Tenax derives a significant portion of its revenue from a concentrated number of large contracts, and the loss or material reduction of any of these contracts may adversely affect its business, financial condition, liquidity or results of operations.

Tenax derives a significant portion of its revenues from the U.S. Forest Service Aerial Supervision Module program, the U.S. Army Geospatial Center’s HR3D program and the U.S. Navy Contracted Air Services Stand Off Jamming program. The loss of any of these contracts, significant changes in the prices or other important terms provided under any of these contracts or adverse developments with respect to these customers’ funding could materially reduce Tenax’s revenue, results of operations and cash flows.

Termination, expiration or non-renewal of Tenax’s existing U.S. government contracts may adversely affect its business.

Tenax’s U.S. government contracts generally are of a finite duration. The termination, expiration or non-renewal of Tenax’s existing U.S. government contracts could result in a loss of anticipated future revenue, which may adversely affect its business, financial condition, liquidity or results of operations.

The U.S. government may stop work or terminate any of Tenax’s government contracts, in whole or in part, at any time at its convenience with little or no notice in accordance with federal acquisition regulations. In addition, for some of its contracts, Tenax is a subcontractor and not the prime contractor, and in those arrangements, the U.S. government could terminate the prime contractor for convenience without regard for Tenax’s performance as a subcontractor. Tenax can give no assurance that one or more of its U.S. government contracts will not be terminated under such circumstances.

The U.S. government may also terminate Tenax’s contracts for default if Tenax fails to meet its obligations under a contract. If any of Tenax’s contracts were terminated for convenience, Tenax generally would be entitled to receive payment for work completed and allowable termination or cancellation costs incurred on or prior to the termination effective date. If any of Tenax’s government contracts were terminated for default, generally the customer would pay Tenax only for the work that has been accepted. Moreover, the customer can require Tenax to pay the difference between the original contract price and the cost to re-procure the contract deliverables, net of the work accepted from the original contract. In addition, the U.S. government can also hold Tenax liable for damages resulting from the default.

The expiration, non-renewal or early termination of any government contracts, whether for convenience or default, would adversely affect Tenax’s current programs and reduce its revenue, earnings and cash flows. A termination for default may also negatively affect Tenax’s reputation, performance ratings and ability to win new government contracts, particularly for contracts covering the same or similar types of services, affect Tenax’s ability to receive extensions on current contracts and complete the full period of performance of such contracts and may lead to increased litigation costs associated with challenging such early termination.

A reduction in U.S. government funding, a change in U.S. government spending priorities or a U.S. government shutdown may adversely affect Tenax’s business, financial condition, liquidity or results of operations.

Tenax’s contracts and revenue greatly depend upon the budgets of certain departments and agencies of the U.S. government, which are subject to the congressional budget authorization and appropriations process and are difficult to predict. The U.S. Congress usually appropriates funds for a given program on an October 1 to September 30 fiscal year basis. Most of Tenax’s U.S. government contracts, whether directly held or subcontracted through a prime contractor, are funded with operation and management (“O&M”) funds, which can only be committed for the current fiscal year. As a result, most of Tenax’s U.S. government contracts have a one-year base period and two to four option years. Funding for the option years is not guaranteed and must be appropriated by the U.S. Congress in future fiscal years. Impacts on the budgets of certain departments and agencies of the U.S. government are a function of many factors beyond Tenax’s control, including, but not limited to, changes in U.S. procurement policies, budget considerations, the federal debt ceiling, current and future economic conditions, presidential administration and congressional priorities, continuing resolutions, changing national security and defense requirements, geopolitical developments and actual fiscal year congressional appropriations for defense budgets. Any of these factors could result in a significant redirection of current and future budgets of certain departments and agencies of the U.S. government and affect Tenax’s future operations and cash flows. Such factors may have a direct bearing on Tenax’s new business opportunities as well as on whether the U.S. government will exercise its options for services under existing contracts, thus affecting the timing and volume of Tenax’s business.

Tenax has also faced, and may in the future face, a prolonged government shutdown, such as the 2025 U.S. federal government shutdown. A prolonged government shutdown could limit Tenax’s ability to be awarded new work, receive additional orders on current contracts, win recompetes or be paid under current contracts.

If Tenax fails to comply with laws and regulations governing federal contractors, Tenax could lose business and be liable for various penalties or sanctions.

Tenax must comply with laws and regulations relating to the formation, administration and performance of government contracts. These laws and regulations include the Federal Acquisition Regulations (“FAR”), Defense Federal Acquisition Regulations, the Truth in Negotiations Act, the Procurement Integrity Act, the Civil False Claims Act, Cost Accounting Standards and laws, regulations and orders restricting the use and dissemination of classified information under the U.S. export control laws and the export of certain products and technical information and safeguarding of contractor information systems. Substantive policy and enforcement priorities related to government contracts are changing very quickly and sometimes ambiguously, adding to the risk. For example, FAR is currently under a comprehensive review and re-write, which may affect Tenax’s business and overall risk once implemented.

In addition, Tenax is subject to U.S. government inquiries and investigations, including periodic audits of costs that Tenax determines are reimbursable under government contracts. U.S. government agencies routinely audit government contractors, including Tenax, to review performance under contracts, cost structure, compliance with applicable contracting and procurement laws, regulations and standards and compliance with applicable cybersecurity requirements, as well as the adequacy of and compliance with internal control systems and policies, including the contractor’s purchasing, property, estimating, compensation and management information systems. Any costs found to be misclassified, inaccurately allocated to a specific contract or otherwise unallowable are not reimbursable and, to the extent already reimbursed, must be refunded. If an audit uncovers improper or illegal activities, Tenax could be subject to possible civil and criminal penalties, sanctions or suspension or debarment. Whether or not illegal activities are alleged, the U.S. government has the ability to decrease or withhold certain payments when it deems systems to be inadequate, with significant financial impact, regardless of the ultimate outcome. As a result of such actions, Tenax may be subject to increased scrutiny, identified for enforcement action or required to engage in remediation efforts, any or all of which could damage Tenax’s reputation, increase its costs (including compliance costs) and risks, create operational challenges or adversely affect its competitiveness. In addition, Tenax risks serious reputational harm in situations involving allegations of impropriety made against Tenax or Tenax’s business partners. Finally, any inadequacies in Tenax’s systems and policies could result in termination of a contract, forfeiture of profits, suspension of payments, fines or suspension or debarment from U.S. government contracting or subcontracting for a period of time.

In addition, facility and personnel security clearances are required in order to be awarded and be able to perform on certain contracts for the U.S. government, which are a significant part of Tenax’s business. Tenax has obtained clearances at appropriate levels that require stringent qualifications, and Tenax may be required to seek higher-level clearances in the future. If for some reason Tenax’s security clearances are invalidated or terminated, Tenax may not be able to continue to perform under some of its contracts or be able to enter into new contracts requiring security clearances, which could affect its ability to maintain current business and to compete for and win new business.

Tenax’s industry is heavily regulated, and if Tenax fails to comply with applicable requirements, its results of operations could suffer.

Tenax’s industry is highly regulated by multiple regulatory authorities within the U.S. government. Before Tenax makes modifications to any airframes, they must meet certain standards of airworthiness established by these regulatory authorities. New and more stringent governmental regulations may be adopted in the future that, if enacted, may have an adverse impact on Tenax. If any of Tenax’s material licenses, certificates, authorizations or approvals were revoked or suspended, its business, financial condition, liquidity and results of operations may be adversely affected.

Violations of applicable laws or regulations by Tenax or by those with whom or through whom Tenax does business could subject Tenax to administrative, civil or criminal investigations and monetary and non-monetary penalties, including suspension and debarment, which could negatively affect its reputation and ability to conduct business and may adversely affect its business, financial condition, liquidity or results of operations.

Tenax’s reputation, ability to do business and financial condition, liquidity and/or results of operations may be affected by the improper conduct of its employees, agents, suppliers, subcontractors or partners.

Misconduct, fraud or other improper activities by Tenax’s employees, agents, suppliers, subcontractors or business partners could have a material adverse impact on its business and reputation. Such misconduct could include the failure to comply with federal, state, local or foreign government procurement regulations, regulations regarding the protection of classified or personal information, legislation regarding the pricing of labor and other costs in government contracts, regulations pertaining to the internal controls over financial reporting, laws and regulations relating to environmental matters, bribery of foreign government officials, lobbying or similar activities, boycotts, antitrust and any other applicable laws or regulations. In addition, misconduct involving data security lapses or inadequate cybersecurity protections resulting in the compromise of personal information or the improper use of Tenax’s customers’ sensitive or classified information could result in remediation costs, regulatory sanctions against Tenax and serious harm to its reputation. Although Tenax has implemented internal policies, procedures, controls and training that are designed to prevent and detect these activities, these precautions may not prevent all misconduct and, as a result, Tenax could face unknown risks or losses. Misconduct by any of Tenax’s employees,

agents, suppliers, subcontractors or business partners or Tenax’s failure to comply with applicable laws or regulations or with applicable internal policies, procedures and controls could create a deficiency in internal controls over financial reporting, subject Tenax to fines and penalties, loss of security clearance, loss of current and future customer contracts and suspension or debarment from contracting with federal, state or local government agencies, any of which may adversely affect its business, financial condition, liquidity or results of operations.

Tenax depends on key personnel at NTC Group, and the loss of these key personnel could adversely affect Tenax’s operations, customer relationships and ability to execute its acquisition strategy.

Thomas Foley and Taran Bakker are majority owners of Tenax and are actively engaged in overseeing Tenax’s operations, including making important decisions regarding contract pricing, hiring, capital expenditures, refinancings and strategy. Mr. Foley and Mr. Bakker also maintain networks of relationships in the aerospace and defense industry and among Tenax’s customers that are important to Tenax’s ability to maintain and grow its business.

Mr. Foley and Mr. Bakker are also responsible for directing Tenax’s acquisition strategy and efforts to identify and evaluate potential acquisitions. Tenax has limited internal personnel with the experience necessary to independently source, negotiate and execute acquisitions without the involvement of Mr. Foley and Mr. Bakker.

If either Mr. Foley or Mr. Bakker ceased to be involved at Tenax, Tenax may be unable to replace their expertise, industry knowledge and relationships on a timely basis or at all, which could disrupt Tenax’s operations, harm Tenax’s business and customer relationships, impair Tenax’s ability to secure new contracts and execute acquisitions and adversely affect Tenax’s business, financial condition, liquidity or results of operations.

Supply chain disruptions could have adverse effects on Tenax’s ability to provide certain products and services.

Tenax’s ability to provide products and services to its customers requires its partners to provide a variety of components and services. In addition, Tenax is required to procure certain components and services from U.S. government-approved sources. Heightened regulatory requirements that may apply to these sources can further limit the subcontractors and suppliers Tenax may use. Legislation, regulatory changes or other governmental actions, including product certification or stewardship requirements, sourcing restrictions, tariffs, export controls, embargoes, product authenticity, cybersecurity regulation and environmental standards may all affect Tenax’s subcontractors and suppliers.

From time to time, Tenax’s subcontractors and suppliers experience financial and operational difficulties outside of Tenax’s direct control, which may affect their ability to deliver the components and services Tenax needs.

Market values for Tenax’s aviation products fluctuate, and Tenax may be unable to recover costs incurred with respect to aircraft or aircraft equipment or parts.

Tenax makes a number of assumptions when determining the recoverability of aircraft, aircraft equipment, aircraft parts and other assets which it owns in support of its customers’ requirements. These assumptions include historical sales trends, current and expected usage trends, replacement values, current and expected lease rates, maintenance expenses, residual values, future demand and future cash flows. The value of any given aircraft model, or any equipment or parts applicable thereto, can vary significantly based on supply in the marketplace. In addition, reductions in demand for these assets or declining market values, as well as differences between actual results and the assumptions Tenax uses in determining the recoverability of its assets, could result in impairment charges in future periods, may adversely affect its business, financial condition, liquidity or results of operations.

Tenax may not be able to recover aircraft or aircraft equipment or parts when a customer defaults on a contract, and even if Tenax is able to do so, it may have to expend significant resources in the recovery of such assets. Third-party liens on such assets could further impair Tenax’s ability to recover and sell or enter into a new contract with those assets.

When a customer defaults on its obligations under a contract and does not cure such default in a timely manner, Tenax typically seeks to terminate the applicable contract and recover the aircraft or aircraft equipment or parts. If a defaulting customer contests the termination and recovery or is under court protection, enforcement of Tenax’s rights under the contract may be difficult, expensive and time-consuming. In the event the aircraft

or aircraft equipment or parts are located outside of the United States, Tenax may need to obtain governmental consents to export such aircraft or aircraft equipment or parts back to the United States. As a result, the relevant asset may not generate revenue for a prolonged period. In addition, Tenax will incur direct costs associated with recovering its aircraft or aircraft equipment or parts, which may include legal and similar costs, costs of transporting, storing and insuring the aircraft or aircraft equipment or parts and costs associated with necessary maintenance and recordkeeping to make the aircraft or aircraft equipment or parts available for a new contract or sale. During this time, Tenax will not realize revenue from the aircraft or aircraft equipment or parts being recovered and will continue to be obligated to pay any debt financing related to the aircraft or aircraft equipment or parts. In addition, when a customer has protection under the U.S. Bankruptcy Code, creditors (including Tenax) are automatically stayed from enforcing their rights.

The risks associated with customer defaults and asset recovery may be further compounded where third-party liens have attached to the relevant aircraft or aircraft equipment or parts. Liens in favor of third parties may be attached to aircraft or aircraft equipment or parts Tenax owns, and these liens may secure substantial sums that may in certain circumstances exceed the value of the particular aircraft or aircraft equipment or parts to which the liens have attached. In certain jurisdictions, a lien may give the lien holder the right to detain, in limited cases sell, or cause the forfeiture of the aircraft or aircraft equipment or parts subject to the lien. Liens held by third parties may have priority over Tenax’s and its creditors’ interest in the respective aircraft or aircraft equipment or parts because the third-party liens have priority under applicable law. These liens and lien holders could impair Tenax’s ability to recover and re-contract or sell its aircraft or aircraft equipment or parts. If Tenax’s customers do not discharge these liens, Tenax may find it necessary to pay the claims secured by such liens in order to recover the aircraft or aircraft equipment or parts subject to such third-party liens.

Tenax’s operations would be adversely affected by a shortage of skilled personnel or work stoppages.

Tenax depends on an educated and highly skilled workforce because of the complex nature of many of its products and services. Tenax’s ability to operate successfully and meet its customers’ demands could be jeopardized if Tenax is unable to attract and retain a sufficient number of qualified personnel, including qualified licensed mechanics, to conduct its business, or if Tenax experiences a significant or prolonged work stoppage. The increasing competition for highly skilled and talented personnel in the industries in which Tenax operates could result in higher compensation costs, difficulties in maintaining a capable workforce and leadership development and succession planning challenges. These and similar events may adversely affect its business, financial condition, liquidity or results of operations.

Tenax depends on continued availability of financing to manage its business and to execute its business strategy, and additional financing may not be available on terms acceptable to Tenax.

Tenax’s ability to manage its business and to execute its business strategy depends, in part, on the continued availability of debt and equity capital. Access to the debt and equity capital markets may be limited by various factors, including the condition of overall credit markets, general economic factors, interest rates, state of the aviation industry, financial performance and credit ratings. Debt and equity capital may not continue to be available to Tenax on favorable terms, or at all. Tenax’s inability to obtain financing on favorable terms may adversely affect its business, financial condition, liquidity or results of operations.

Tenax operates in highly competitive markets, and competitive pressures may adversely affect it.

Tenax’s business is highly competitive, and Tenax sometimes competes with larger companies that may have greater name recognition, greater financial resources and larger technical staff, as well as companies with a competitive advantage due to a small business designation. Within the aviation industry, companies have engaged in mergers and acquisitions to increase their competitive position. Tenax’s competitors may provide customers with different or greater capabilities or better contract terms than Tenax can provide, including past performance, geographic presence, price and the availability of qualified professional personnel. In addition, Tenax’s competitors may consolidate or establish teaming or other relationships among themselves or with third parties to increase their ability to address customers’ needs. If Tenax is unable to compete successfully against its current or future competitors, it may experience declines in revenue and market share, which may adversely affect its business, financial condition, liquidity or results of operations.

Tenax may need to make significant capital expenditures to keep pace with technological developments in the aviation industry.

The aviation industry, and in particular the specialized verticals in which Tenax operates, is constantly undergoing development and change, and new products, equipment and methods of repair and overhaul services are introduced on an ongoing basis. In order to keep pace with technological and other developments in its industry, Tenax sometimes needs to expend significant capital to develop information technology solutions, purchase new equipment, train its employees in the new methods of service or implement new processes to increase both efficiency and capacity. Not all projects may be implemented as anticipated as a result of various factors, including ability to meet customer specifications, delivery schedules and unique contractual requirements, supplier performance, subcontractor performance and Tenax’s ability to accurately estimate costs and timing associated with such projects. If projects do not achieve anticipated increases in efficiency or capacity, Tenax’s returns on these capital expenditures may be lower than expected. Failure to react quickly to industry trends and manage its offerings and innovation activities responsively could decrease the competitiveness of Tenax’s services, harm its reputation and negatively affect its ability to compete and attract top talent.

Tenax uses estimates in accounting for some of its contracts, and changes in its estimates could adversely affect its future financial results.

Contract accounting requires judgments relative to assessing risks, including risks associated with estimating contract transaction prices and costs, determination of certain contract prices, assumptions for schedule and technical issues, customer-directed delays and reductions in scheduled deliveries and unfavorable resolutions of claims and contractual matters. Due to the size and nature of certain of Tenax’s contracts, the estimation of total costs at completion is complicated and subject to certain variables. For example, Tenax must make assumptions regarding the length of time to complete certain contracts because costs include expected increases in wages and prices for materials, and Tenax must consider incentives or penalties related to performance on contracts and include them in the variable consideration to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the related uncertainty is resolved. Because of these judgments and estimation processes, it is possible that materially different amounts could be recorded if Tenax used different assumptions or if the underlying circumstances were to change. Changes in underlying assumptions, circumstances or estimates may adversely affect Tenax’s business, financial condition, liquidity or results of operations.

Tenax’s business could be negatively affected by cyber or other security threats or other disruptions.

Tenax’s business depends on information technology and computerized systems to communicate and operate effectively. Tenax stores sensitive data including proprietary business information, intellectual property and confidential employee or other personal data on its servers and databases. Tenax also relies on third parties to host certain enterprise systems that manage and host Tenax’s data and that of its customers. Tenax’s systems and technologies, or those of third parties on which Tenax relies, could fail or become unreliable due to equipment failures, software viruses, cyber threats or cyber incidents, ransomware attacks, employee error or malfeasance, terrorist acts, natural disasters, power or telecommunications failures, political or social unrest, pandemics or other public health issues or other causes. These threats arise in some cases as a result of Tenax’s role as a defense contractor. Tenax’s customers, including the U.S. government, are increasingly requiring cybersecurity protections and mandating cybersecurity standards in its products, and Tenax has incurred and expects to continue to incur additional cost to comply with such demands.

If Tenax’s systems, data or any third-party service that Tenax uses are unavailable for any reason, Tenax’s customers may experience service interruptions, which could significantly affect Tenax’s operations, reputation, business and financial results. Lack of access to Tenax’s data and that of its clients, or failure of its systems or those of its third-party service providers, may result in interruptions in Tenax’s service, all of which may cause a loss in customers, refunds and/or material harm to Tenax’s reputation and operating results.

In addition, Tenax can make no assurances that it will be able to mitigate, detect, prevent, timely and adequately respond to or fully recover from the negative effects of cybersecurity incidents or other cybersecurity compromises, and such cybersecurity incidents, depending on their nature and scope, could potentially result in financial loss, reputational damage, damage to Tenax’s IT systems, data loss, litigation with third parties, theft of intellectual property, fines, customer attrition, diminution in the value of Tenax’s investment in research and

development and increased cybersecurity protection and remediation costs due to the increasing sophistication and proliferation of threats, which in turn could adversely affect Tenax’s competitiveness and results of operations. Any imposition of liability may adversely affect Tenax’s business, financial condition, liquidity or results of operations.

Tenax’s operations depend on its aircraft and hangars, and damage to, or disruption affecting, those assets could materially adversely affect its business, financial condition or results of operations.

The operation of aircraft inherently involves a substantial degree of risk. Tenax’s aircraft and hangars are subject to hazards including mechanical failures, crashes, collisions, human error, fires and other operational incidents. These risks may result in damage to aircraft or other property and equipment, and, in certain circumstances, personal injury or loss of life, which could give rise to liability exposure, as well as suspension or reduction of operations, reduced flight hours, the grounding of affected aircraft or entire aircraft types or limitations in available ground facilities.

An accident or other incident involving Tenax’s aircraft could require the repair or replacement of the damaged asset and result in its temporary or permanent loss from service or use. Any such damage or loss of use could cause significant delays in provision of services and the loss of sales and customers, as well as result in potential liability exposure.

While Tenax maintains insurance coverage to cover certain risks of losses for damage to or destruction of aircraft and for interruption of its business, such insurance may not cover specific losses, and the amount of its insurance coverage may not be adequate to cover all of its losses.

Restrictive and financial covenants in the documents governing Tenax’s existing and any future indebtedness may limit its current and future operations, particularly Tenax’s ability to respond to changes in its business or to pursue its business strategies.

Certain current financing arrangements, including the Credit Agreement, dated as of January 7, 2026, as amended pursuant to the First Amendment, dated as of August 14, 2026, among Tenax Holdco, LLC, the lenders party thereto and AEA Mezzanine Fund IV LP, as collateral agent (the “Tenax Holdco Credit Agreement”), and the Second Lien Credit Agreement, dated as of January 7, 2026, as amended pursuant to the First Amendment, dated as of August 14, 2026, among TAH, certain other credit parties party thereto from time to time, the lenders party thereto and AEA Mezzanine Fund IV LP, as collateral agent (the “TAH Second Lien Credit Agreement”), require Tenax and its affiliates to comply with various restrictive covenants, and in certain cases contain financial covenants that require Tenax and its affiliates to comply with specified financial ratios and tests. Tenax’s or its affiliates’ failure to meet these covenants could result in default under these credit agreements and may result in a cross-default under other loan and debt agreements. In the event of a default and Tenax’s inability to obtain a waiver of the default, all amounts outstanding under such debt agreements could be declared immediately due and payable. Tenax’s or its affiliates’ failure to comply with these covenants may adversely affect its business, financial condition, liquidity or results of operations.

Restrictive covenants in the documents governing Tenax’s existing and any future indebtedness could adversely affect Tenax’s ability to finance its operations, make strategic acquisitions or investments, withstand a future downturn in its business or the economy in general, engage in business activities, including future opportunities, that may be in its interest, plan for or react to market conditions or otherwise execute its business strategies. In particular, the Tenax Holdco Credit Agreement and the TAH Second Lien Credit Agreement contain change of control provisions that could delay or impair beneficial mergers and acquisitions involving Tenax.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This proxy statement/prospectus and documents incorporated by reference herein include forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended. These statements may reflect AIR’s expectations, beliefs, hopes, intentions or strategies regarding, among other things, the Transactions between AIR and Tenax, the expected timetable for completing the Transactions, the benefits and synergies of the Transactions and future opportunities for the combined company, as well as other statements that are not historical facts, including, without limitation, statements concerning future financial performance, future debt and financing levels, investment objectives, implications of litigation and regulatory investigations and other management plans for future operations and performance. Words such as “anticipate(s)”, “expect(s)”, “intend(s)”, “plan(s)”, “target(s)”, “project(s)”, “believe(s)”, “will”, “aim”, “would”, “seek(s)”, “estimate(s)” and similar expressions are intended to identify such forward-looking statements.

Forward-looking statements are based on management’s current expectations, projections, estimates, assumptions and beliefs and are subject to a number of known and unknown risks, uncertainties and other factors that could lead to actual results materially different from those described in the forward-looking statements. AIR cannot give any assurance that its expectations will be attained. AIR’s and Tenax’s actual results, liquidity and financial condition may differ from the anticipated results, liquidity and financial condition indicated in these forward-looking statements. AIR cautions readers that any such statements are based on currently available operational, financial and competitive information, and they should not place undue reliance on these forward-looking statements, which reflect management’s opinion only as of the date on which they were made. These forward-looking statements are not a guarantee of future performance and involve risks and uncertainties, and there are certain important factors that could cause AIR’s or Tenax’s actual results to differ, possibly materially, from expectations or estimates reflected in such forward-looking statements, including, but without limitation:

•        our ability to complete the merger, if at all, on the anticipated terms and timing, including obtaining the requisite approvals from the AIR stockholders, regulatory approvals, consents from third parties and the satisfaction of other conditions to the completion of the merger;

•        the impact of certain interim operating restrictions that AIR and Tenax are subject to under the merger agreement;

•        provisions in the merger agreement that limit our ability to pursue alternatives to the merger, which might discourage a third party that has an interest in acquiring all or a significant part of AIR from considering or proposing any such transaction;

•        the possibility that the unaudited pro forma condensed combined financial statements and prospective financial information included in this proxy statement/prospectus may differ materially from the actual financial condition and results of operations of the combined company;

•        the inherent uncertainty in the valuation of Tenax;

•        the risk that the market price for AIR common stock following the merger may be affected by factors different from those that historically have affected AIR common stock;

•        the inherent complexity and expense of combining AIR and Tenax and the risk that the anticipated benefits and cost savings of the merger may not be realized;

•        AIR’s ability to retain and hire key personnel;

•        the substantial transaction-related costs AIR will continue to incur in connection with the merger and the integration of AIR and Tenax;

•        the fact that AIR will be a controlled company following the completion of the merger;

•        risks relating to the concentration of Tenax’s customer base and Tenax’s dependence on winning profitable contracts from U.S. government customers;

•        legislative, regulatory and economic developments affecting AIR’s and Tenax’s businesses;

•        risks relating to the loss of key personnel at Tenax;

•        general economic and market developments and supply chain and labor market conditions;

•        competitive pressures;

•        the use of accounting estimates; and

•        the continued availability of financing.

These and other risks and uncertainties are more fully discussed in the section entitled “Risk Factors” beginning on page 16 of this proxy statement/prospectus.

Neither Tenax nor AIR is under any obligation, and each expressly disclaims any obligation, to update, alter or otherwise revise any forward-looking statements, whether written or oral, that may be made from time to time, whether as a result of new information, future events or otherwise, except as required by law. Persons reading this proxy statement/prospectus are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this proxy statement/prospectus.

INFORMATION ABOUT THE SPECIAL MEETING

AIR Stockholders Meeting

How to Vote

If you are a stockholder as of the record date for the special meeting, you may cast your vote in one of the following ways:

Telephone and Internet voting facilities for stockholders of record will be available 24 hours a day and will close at 11:59 P.M. (Eastern Time) on [•], 2026. Votes cast by mail must be received in sufficient time to allow processing.

Matters to Be Voted Upon and AIR Board Recommendation

This proxy statement/prospectus is being furnished to you as an AIR stockholder as part of the solicitation of proxies by the AIR Board for use at the special meeting to consider and vote upon the stock issuance proposal, the authorized shares proposal and the written consent proposal.

PROPOSAL 1 — APPROVAL OF THE STOCK ISSUANCE PROPOSAL

(Item 1 on the AIR proxy card)

Subject to certain limited exceptions, Section 712 of the NYSE American Company Guide requires that our stockholders approve any issuance of shares of common stock where the issuance of common stock could result in an increase in outstanding common shares of 20% or more. In addition, Section 713(b) of the NYSE American Company Guide requires stockholder approval prior to the issuance of securities that will result in a change in control of the issuer.

As a result of the merger, AIR will issue to the Tenax Members as of immediately prior to the effective time a number of shares of AIR common stock which will result in an increase in outstanding common shares of more than 20%. In addition, completion of the merger will result in a change in control of AIR for purposes of Section 713(b) of the NYSE American Company Guide. Accordingly, the merger cannot be completed without the approval of the stock issuance proposal. Following the merger, approximately 96% of the outstanding shares of AIR common stock will be held by the Tenax Members. The merger agreement is attached as Annex A to this proxy statement/prospectus.

Pursuant to the merger agreement, approval of the stock issuance proposal is a condition to the consummation of the merger.

Approval of the stock issuance proposal requires, in accordance with Section 713(b) of the NYSE American Company Guide, that the votes cast “FOR” the stock issuance proposal exceed the votes cast “AGAINST” the stock issuance proposal. Abstentions and broker non-votes will have no effect on the outcome of this vote.

The AIR Board unanimously recommends that AIR stockholders vote “FOR” the stock issuance proposal.

PROPOSAL 2 — APPROVAL OF THE AUTHORIZED SHARES PROPOSAL

(Item 2 on the AIR proxy card)

The authorized shares proposal, if approved, will provide for an amendment to the articles of incorporation of AIR to increase the number of authorized shares of AIR common stock from 20 million to 200 million to permit issuance of a sufficient number of shares as merger consideration.

Pursuant to the merger agreement, approval of the authorized shares proposal is a condition to the consummation of the merger.

Approval of the authorized shares proposal requires, pursuant to Section 1.8.1 of our bylaws and NRS 78.390(1)(a)(1), that the votes cast “FOR” the authorized shares proposal exceed the votes cast “AGAINST” the authorized shares proposal. Under Section 1.8.1 of AIR’s bylaws, “votes cast” means all votes cast in favor of and against the proposal and does not include abstentions or broker non-votes. Abstentions and broker non-votes will have no effect on the outcome of this vote.

The AIR Board unanimously recommends that AIR stockholders vote “FOR” the authorized shares proposal.

PROPOSAL 3 — APPROVAL OF THE WRITTEN CONSENT PROPOSAL

(Item 3 on the AIR proxy card)

The written consent proposal, if approved, will provide for an amendment to the articles of incorporation of AIR to authorize stockholder action by written consent in lieu of a stockholder meeting at any time while NTC Group, Thomas Foley and Taran Bakker and their respective affiliates collectively beneficially own at least a majority of the voting power of the outstanding shares of AIR common stock.

Pursuant to the merger agreement, approval of the written consent proposal is a condition to the consummation of the merger.

Approval of the written consent proposal requires, pursuant to NRS 78.390(1)(a)(2), the affirmative vote of the holders of shares representing at least a majority of the voting power of the outstanding shares of AIR common stock entitled to vote thereon as of the record date for the special meeting. A failure to vote, a broker non-vote or an abstention will each have the same effect as a vote “AGAINST” this proposal.

The AIR Board unanimously recommends that AIR stockholders vote “FOR” the written consent proposal.

PROPOSAL 4 — APPROVAL OF THE TRANSACTION COMPENSATION PROPOSAL

(Item 4 on the AIR proxy card)

Section 14A of the Exchange Act and Rule 14a-21(c) under the Exchange Act require that the Company seek a non-binding advisory vote from its stockholders to approve the compensation that may be paid or become payable to AIR’s Named Executive Officers in connection with the merger, as disclosed in this proxy statement/prospectus, including as described in the section entitled “The Merger — Potential Payments to AIR’s Named Executive Officers Upon Completion of the Merger” beginning on page 53 of this proxy statement/prospectus.

As an advisory vote, the transaction compensation proposal is not binding upon AIR, and approval of the transaction compensation proposal is not a condition to completion of the merger. Accordingly, to the extent that AIR is contractually obligated to pay the compensation, such compensation will be payable, subject only to the conditions applicable thereto, if the merger is consummated and regardless of the outcome of the advisory vote.

Approval of the transaction compensation proposal requires that the votes cast “FOR” the transaction compensation proposal exceed the votes cast “AGAINST” the transaction compensation proposal. Abstentions and broker non-votes will have no effect on the outcome of this vote. As noted above, this vote is advisory and non-binding and will not be determinative of whether such compensation is paid.

The AIR Board unanimously recommends that AIR stockholders vote “FOR” the transaction compensation proposal.

PROPOSAL 5 — APPROVAL OF THE ADJOURNMENT PROPOSAL

(Item 5 on the AIR proxy card)

We may propose to adjourn the special meeting for a period of not more than 30 days, if necessary or appropriate, including if we fail to receive a sufficient number of votes to approve the stock issuance proposal, the authorized shares proposal or the written consent proposal, for the purpose of soliciting additional proxies to approve the stock issuance proposal, the authorized shares proposal and/or the written consent proposal.

If the special meeting is so adjourned, stockholders who have already submitted their proxies will be able to revoke them at any time prior to their use. If you sign and return a proxy and do not indicate how you wish to vote on any proposal, or if you indicate that you wish to vote in favor of the stock issuance proposal, the authorized shares proposal or the written consent proposal but do not indicate a choice on the adjournment proposal, your shares of common stock will be voted in favor of the adjournment proposal. If you indicate, however, that you wish to vote against the stock issuance proposal, the authorized shares proposal or the written consent proposal, your shares of common stock will only be voted in favor of the adjournment proposal if you indicate that you wish to vote in favor of that proposal.

Approval of the adjournment proposal requires that the votes cast “FOR” the adjournment proposal exceed the votes cast “AGAINST” the adjournment proposal. Abstentions and broker non-votes will have no effect on the outcome of this vote.

The AIR Board unanimously recommends that AIR stockholders vote “FOR” the adjournment proposal.

The AIR Board has unanimously (i) determined that the merger agreement and the Transactions are fair to and in the best interests of AIR and its stockholders and (ii) adopted and approved the merger agreement and the Transactions, on the terms and subject to the conditions set forth in the merger agreement. Accordingly, the AIR Board unanimously recommends that AIR’s stockholders vote “FOR” the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal.

PARTIES TO THE MERGER

Air Industries Group
1460 Fifth Avenue
Bay Shore, NY 11706
(631) 968-5000

AIR is a leading manufacturer of precision components and assemblies for large aerospace and defense prime contractors. Its products include landing gears, flight controls, engine mounts and components for aircraft jet engines, ground turbines and other complex machines. Whether it is a small individual component or complete assembly, its high-quality and highly reliable products are used in mission-critical operations essential for the safety of military personnel and civilians. AIR operates two primary manufacturing facilities located in Bay Shore, New York, and Barkhamsted, Connecticut, and currently employs approximately 158 people.

AIR common stock is listed on the NYSE American under the symbol “AIRI”.

Tenax Aerospace Acquisition, LLC
400 West Parkway Place, Suite 201
Ridgeland, MS 39157
(601) 352-1107

Tenax is an aerospace and defense supplier providing special mission aircraft and related aviation equipment and services to the U.S. and Canadian governments and other customers. The company focuses on enduring special mission aviation programs critical to national security and the public interest, including aerial firefighting, airborne ISR, airborne engagement simulation and airborne sensor testing and training. Founded in 2001, Tenax is privately owned and headquartered in Ridgeland, Mississippi. Tenax currently employs approximately 248 people.

Transitory Air Sub LLC
1460 Fifth Avenue
Bay Shore, NY 11706
(631) 968-5000

Merger Sub was formed solely for the purpose of facilitating the merger and the Transactions. Merger Sub has not carried on any activities or operations to date, except for those activities incidental to its formation and undertaken in connection with the merger and the Transactions. Pursuant to the merger agreement, at the effective time, Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR.

THE MERGER

This section describes the merger and the transactions contemplated thereby. The description in this section and elsewhere in this proxy statement/prospectus is qualified in its entirety by reference to the complete text of the merger agreement and the amendment to the merger agreement, copies of which are attached as Annex A and Annex A-1, respectively, and incorporated by reference into this proxy statement/prospectus. This summary does not purport to be complete and may not contain all of the information about the merger and the transactions contemplated thereby that is important to you. You are encouraged to read the merger agreement carefully and in its entirety. This section is not intended to provide you with any factual information about AIR or Tenax. Such information can be found elsewhere in this proxy statement/prospectus.

Merger

Pursuant to the merger agreement, at the effective time of the merger, Merger Sub will be merged with and into Tenax, with Tenax surviving the merger as a wholly owned subsidiary of AIR.

Merger Consideration; Adjustments to the Merger Consideration

At the effective time of the merger, Tenax units issued and outstanding immediately prior to the effective time will be converted into the right to receive the portion of the merger consideration allocated in respect thereof in Tenax’s capitalization schedule, which Tenax is required to deliver to AIR no less than two business days prior to the closing. Pursuant to the merger agreement, the merger consideration will consist of 126,900,000 shares (which number will be adjusted to 25,380,000 shares after giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split) of AIR common stock to be issued to the Tenax Members and, as applicable, reserved for issuance to the Tenax Warrantholders upon the exercise of their warrants.

A portion of the merger consideration is allocable to the Tenax Warrantholders. AIR will reserve for future issuance, upon exercise of the warrants, a number of shares of AIR common stock equal to the total merger consideration that would be payable to the Tenax Warrantholders if all Tenax Warrantholders exercised their warrants (if and to the extent they remain outstanding) immediately prior to the effective time.

Ownership of the Combined Company

As a result of the merger, the AIR stockholders as of immediately prior to the effective time will collectively own approximately 4% of the outstanding shares of AIR common stock, on a fully diluted basis, and the Tenax Members and Tenax Warrantholders will collectively own approximately 96% of the outstanding shares of AIR common stock, on a fully diluted basis. Accordingly, the merger will result in substantial dilution to existing AIR stockholders, and the Tenax Members will have a controlling interest in AIR following completion of the merger.

Redemption Rights Agreement

Prior to the closing, AIR will declare and issue, as a dividend to AIR stockholders as of the trading day immediately preceding the closing date, a right to cause AIR to redeem shares of AIR common stock that such AIR stockholders then own and continue to own on the first anniversary of the closing. The Redemption Rights will entitle the holders thereof to require AIR to purchase all or a portion of such AIR stockholder’s shares of AIR common stock for a redemption price, payable in cash, equal to 107.3% of the Debt Adjusted AIR Share Price, if the volume weighted average price of AIR common stock during the 20 trading days preceding the first anniversary of the closing is lower than 107.3% of the Debt Adjusted AIR Share Price. The Redemption Rights will not be transferable.

Financing of the Merger

The merger agreement requires that, at the closing of the merger, Tenax fund the repayment of AIR’s net senior and subordinated debt, amounting in the aggregate to approximately $26.1 million as of August 31, 2026.

On August 14, 2026, TAH entered into the third amendment to its Second Amended and Restated Credit Agreement, dated as of January 23, 2024, among TAH, as borrower; the guarantors party thereto; the financial institutions party thereto as lenders; Regions Bank, as administrative agent; and Regions Equipment Finance Corporation, as collateral agent (the “TAH First Lien Credit Agreement”). This amendment, among other things, (a) increased the revolving line of credit from $30,000,000 to $50,000,000; (b) established a new Delayed Draw Term Loan (“DDTL”) #3, with aggregate commitments

of $45,000,000 available through August 14, 2028, the proceeds of which may be used to finance the acquisition and/or modification of aircraft and aircraft leases and to finance permitted acquisitions other than the merger; and (c) established a new DDTL #4, with aggregate commitments of $30,000,000 available through December 31, 2026, the proceeds of which may be used solely to finance the merger and to pay related fees, costs and expenses. As a result of this amendment, Tenax’s available borrowing capacity under its existing credit facility has increased to approximately $106 million, and Tenax has obtained binding lender commitments specifically designated to finance the merger.

In addition to delivery of customary documentation and certificates, the conditions to drawing down under DDTL #4 include the following: (i) all representations and warranties contained in the TAH First Lien Credit Agreement and the other Credit Documents (as defined in the TAH First Lien Credit Agreement) shall be true and correct in all material respects (or, to the extent already qualified or modified by materiality, in all respects) on and as of the date of the draw down to the same extent as though made on and as of such date, except to the extent that such representations and warranties specifically relate to an earlier date, in which case they shall be true and correct in all material respects (or, to the extent already qualified or modified by materiality, in all respects) as of such earlier date; (ii) no Default or Event of Default (as such terms are defined in the TAH First Lien Credit Agreement) shall exist immediately before or immediately after giving effect to the draw down; and (iii) after giving effect to the draw down on a pro forma basis, TAH will be in compliance with the financial covenants set forth in the TAH First Lien Credit Agreement and TAH shall have Liquidity (as defined in the TAH First Lien Credit Agreement) of at least $7 million. As of the date of this proxy statement/prospectus, the representations and warranties contained in the TAH First Lien Credit Agreement are true and correct in all material respects and no Default or Event of Default under the TAH First Lien Credit Agreement has occurred and is continuing. Based upon information provided by Tenax, management of AIR believes that as of the closing date TAH will be in compliance with the financial covenants contained in the TAH First Lien Credit Agreement and will have Liquidity in excess of the required $7 million, although there can be no assurance that these conditions will be satisfied.

Reverse Stock Split

Under Section 341 of the NYSE American Company Guide, if a listed issuer engages in a reverse merger, it will be eligible for continued listing on the NYSE American only if the post-transaction entity meets the standards for initial listing. Companies listed on the NYSE American are subject to initial listing standards that require, among other things, a minimum share price of $4.00 per share under Section 101 of the NYSE American Company Guide. As of the date of this proxy statement/prospectus, the trading price of AIR’s common stock on the NYSE American is less than $4.00 per share, and there is no assurance it will not be below $4.00 per share at the effective time, meaning the combined company would fail to meet the standards for initial listing on the NYSE American. As a result, prior to the closing but, assuming the authorized shares proposal is approved at the special meeting, after the related amendment to the articles of incorporation of AIR to increase the number of authorized shares of AIR common stock from 20 million to 200 million becomes effective, AIR will file a certificate of change with the Nevada Secretary of State to effect, pursuant to NRS 78.207, a reverse stock split of the issued and outstanding shares of AIR common stock at a ratio of one (1) post-split share of AIR common stock for every five (5) pre-split shares of AIR common stock, while simultaneously reducing the number of then authorized shares of AIR common stock under the articles of incorporation of AIR by a corresponding factor, from 200 million to 40 million, with any fractional share of AIR common stock otherwise resulting from the split rounded up to the nearest whole share. Pursuant to NRS 78.207, the AIR Board has the authority to effect such a reverse stock split without stockholder approval. As a result of the reverse stock split, no fractional shares will be issued and any AIR stockholder otherwise entitled to a fractional share will be rounded up to the nearest whole share.

Background of the Merger

The AIR Board continuously evaluates AIR’s strategic direction with the objective of enhancing long-term stockholder value. As part of this ongoing process, the AIR Board regularly considers strategic alternatives, including organic growth opportunities and initiatives, capital allocation strategies, strategic partnerships and potential mergers or acquisitions.

In connection with these evaluations, in the first half of 2025, the AIR Board considered, among other things, (i) AIR’s ability to refinance its existing senior indebtedness with Webster Bank, National Association (“Webster Bank”) and its subordinated debt; (ii) the going concern opinion issued by AIR’s registered public accounting firm for the fiscal year ended December 31, 2024; (iii) the performance of AIR’s operations in the first half of 2025; (iv) management’s business plans and operating outlook; and (v) the potential to enhance stockholder value through one or more strategic transactions.

After the AIR Board evaluated these considerations, on June 2, 2025, AIR engaged Kipps, an investment banking firm experienced in and highly regarded in the aerospace industry, to act as financial advisor on an exclusive basis in connection with a possible transaction involving AIR, including an acquisitive merger or sale of AIR or substantially all of its assets. Beginning in mid-June 2025 and continuing into August 2025, representatives of Kipps worked closely with AIR management to develop a strategy to pursue and effectuate a potential transaction and to prepare marketing materials describing AIR and its strategic attributes. AIR also engaged Baker Tilly US, LLP (“Baker Tilly”), an internationally recognized firm of independent accountants, to prepare a quality of earnings analysis to facilitate review of AIR’s historical financial statements by potential transaction counterparties.

In late June 2025, at the direction of the AIR Board, representatives of Kipps began contacting potential transaction counterparties. The AIR Board did not restrict the scope of such outreach, and representatives of Kipps contacted prospective financial and strategic counterparties, including competitors of AIR in the aerospace and defense industry. Over the course of June, July and August 2025, in consultation with the AIR Board, representatives of Kipps contacted 220 prospective counterparties (72 strategic counterparties, including private equity-backed portfolio companies, and 148 private equity groups). Of those contacted, 107 potential counterparties (29 strategic counterparties and 78 private equity groups) entered into confidentiality agreements with AIR and received a confidential information presentation describing the business and operational and financial attributes of AIR. These potential counterparties also received an instruction letter inviting them to submit a non-binding indication of interest (an “IOI”) to acquire all of the outstanding equity of AIR’s four subsidiaries or all or substantially all of the assets of AIR.

On August 8, 2025, Michael Recca, on behalf of AIR, met with Thomas C. Foley, Sr., founder and partner of NTC Group, a private investment firm that controls Tenax. Following the meeting, Mr. Foley submitted a non-binding IOI dated August 18, 2025, proposing that AIR and Tenax combine through a reverse merger transaction. In his letter, Mr. Foley proposed that AIR acquire Tenax for 90 million shares of AIR common stock, which would be issued to NEH and the other Tenax Members. This proposal was based on valuing (i) AIR at 7.5 times its estimated Run-Rate EBITDA for the second half of 2025 minus AIR’s net debt and (ii) Tenax at 9.0 times its estimated fourth quarter 2025 Run-Rate EBITDA minus net debt.1 In addition, for AIR stockholders who preferred to receive cash, Mr. Foley proposed that Tenax would offer to purchase shares of AIR common stock from such AIR stockholders at a price per share at a premium to the then market price of AIR’s common stock.

By the end of August 2025, eight potential counterparties (four strategic counterparties and four private equity groups), including Tenax, submitted written, preliminary, non-binding IOIs, which included indications of the value such potential counterparties attributed to AIR or its operating assets. Seven of these potential counterparties expressed interest in acquiring substantially all of the operating assets and assuming the liabilities of AIR, with enterprise valuations ranging from $28,000,000 to $55,000,000. Based on the content of the IOIs submitted by the potential counterparties and input obtained from preliminary discussions held by representatives of Kipps with such potential counterparties, AIR determined to invite seven potential counterparties (including Tenax) to continue participating in the sales process.

On September 24, 2025, the AIR Board established a special committee (the “Special Committee”), consisting of three independent directors — Messrs. Michael Porcelain, Michael Brand and David Buonanno — to facilitate the AIR Board’s evaluation of potential strategic transactions. The Special Committee was established to, among other things, review, evaluate and oversee discussions relating to potential strategic alternatives, including a possible merger or sale of AIR, and to provide advice and recommendations to the full AIR Board with respect to such matters.

In carrying out its responsibilities, the Special Committee was authorized to work with management and AIR’s financial and legal advisors, evaluate the strategic rationale and financial terms of any proposed transaction, consider potential conflicts of interest and assess whether any proposed transaction would be fair to, and in the best interests of, AIR and its stockholders. Upon its formation on September 24, 2025, the Special Committee requested that Mr. Michael Recca, AIR’s Director of Special Projects, assist the Special Committee in connection with its evaluation of potential strategic transactions. In this role, Mr. Recca provided information and support at the direction of the Special Committee, including facilitating the preparation and review of financial and operational materials, coordinating the flow of information between management, the Special Committee, the AIR Board and AIR’s advisors and responding to requests for information from the Special Committee and its advisors. Mr. Recca did not participate in any deliberations or decision-making of the Special Committee.

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1        Because Run-Rate EBITDA reflects estimated future results, both AIR and Tenax are unable to provide a reconciliation to the most directly comparable GAAP measure, which is based on historical financial information.

The Special Committee met periodically from October 2025 to December 2025 to review developments relating to the sourcing and evaluation of strategic alternatives and reported its findings and recommendations to the full AIR Board for consideration.

Beginning in September 2025 and continuing through mid-October 2025, AIR conducted due diligence meetings, gave facility tours and had preliminary business discussions with the seven potential counterparties. After participating in management meetings in September 2025, two of the potential counterparties elected not to proceed further and five of the seven potential counterparties, which included Tenax, elected to continue in the process. In early October 2025, in coordination with representatives of Kipps, AIR established a virtual data room to facilitate due diligence investigations by the remaining five potential counterparties.

On September 24, 2025, AIR received a letter from Mr. Foley proposing that AIR acquire Tenax for 90 million shares of AIR common stock, which would be issued to NEH and the other Tenax Members. This proposal was based on valuing (i) AIR at 7.5 times its estimated Run-Rate EBITDA for the second half of 2025 minus net debt and (ii) Tenax at 9.0 times its estimated fourth quarter 2025 Run-Rate EBITDA minus AIR’s net debt.2 In addition, for AIR stockholders who preferred to receive cash, Mr. Foley proposed that Tenax would offer to purchase shares of AIR common stock from such AIR stockholders at a cash price of $3.50 per share.

On October 20, 2025, representatives of Kipps contacted Mr. Foley to provide an update on the AIR sales process and timeline and to confirm whether Tenax remained interested in continuing discussions with AIR. In this discussion, representatives of Kipps advised Mr. Foley that AIR had completed management meetings with all active bidders and that letters were sent seeking final proposals from the five remaining bidders no later than November 13, 2025. Mr. Foley indicated to the representatives of Kipps participating in the discussion that he was only interested in a “reverse merger” transaction structure, pursuant to which the Tenax Members would receive AIR common stock.

On November 13, 2025, a potential counterparty (“Counterparty A”) expressed a desire to continue to evaluate a transaction with AIR and submitted a proposal that did not provide a determinate valuation of AIR. Counterparty A also verbally advised representatives of Kipps that it was reviewing other strategic transactions, including a possible sale of its own stock or assets that would affect its ability to pursue and finance an acquisition of AIR, and asked for an extension of the period in which it could submit a bid.

On November 13, 2025, Tenax submitted a proposal for a combination of AIR and Tenax in which the Tenax Members would receive 98 million shares of AIR common stock. In addition, Tenax offered to purchase from AIR’s stockholders at the time of the closing of the transaction up to one million shares of AIR common stock for $4.00 per share and to grant all AIR stockholders immediately prior to the closing of the transaction a right to put their shares to the combined company approximately one year after the closing of the transaction at a price of $4.25 per share, if, during a 30-day measurement period prior, the average daily price of the shares was below $4.25 per share.

On November 14, 2025, another potential counterparty (“Counterparty B”), an independent wealth fund, submitted a proposal for the acquisition of substantially all of the assets and assumption of all of the liabilities of AIR for an enterprise valuation of $50,000,000, subject to further due diligence and a price adjustment based upon AIR’s net working capital as of closing.

On November 17, 2025, representatives of Kipps participated in a conference with the AIR Board in which it provided analyses of the bids submitted by Tenax and Counterparty B. The representatives of Kipps also described the proposal received from Counterparty A, noting for the AIR Board the lack of a clear valuation in Counterparty A’s proposal.

Through the balance of November 2025, at the direction of the Special Committee, representatives of Kipps engaged in discussions with each of the three potential counterparties to clarify their respective proposals. During discussions with Counterparty A, Counterparty A did not provide clarity regarding its valuation of AIR, or whether it could consummate a transaction in light of the uncertainty of its own strategic plans, and repeatedly requested additional time to clarify its intentions.

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2        Because Run-Rate EBITDA reflects estimated future results, both AIR and Tenax are unable to provide a reconciliation to the most directly comparable GAAP measure, which is based on historical financial information.

Based on the uncertainty expressed by Counterparty A and its inability to move forward on a timely basis, and in light of the AIR Board’s belief that, due to a deterioration in AIR’s financial performance and concerns about AIR’s ability to refinance its debt obligations, AIR needed to consummate a transaction promptly, AIR determined not to pursue a transaction with Counterparty A, and representatives of Kipps informed Counterparty A of AIR’s decision during the week of November 24, 2025. Subsequently, Counterparty A did not seek to continue discussions regarding a transaction with AIR.

In mid-November 2025, the Special Committee directed AIR’s management to prepare updated financial forecasts for 2025 and 2026 (the “November 2025 Forecast”) to be provided by Kipps to Counterparty B and Tenax and to request best-and-final offers. The November 2025 Forecast was provided to Counterparty B and Tenax to enable them to make their best-and-final offers on the basis of the latest information available to the AIR Board. The November 2025 Forecast projected a deterioration in the performance of AIR and negative cash flows from operations through the first half of 2026, which was likely to result in a need on the part of AIR to increase its debt to maintain operations. During a conference on November 21, 2025, the Special Committee advised the rest of the AIR Board of the implications of the November 2025 Forecast, and the AIR Board discussed the various alternatives then available, including whether AIR could refinance all of its outstanding debt and, if so, whether the terms of any such refinancing would be acceptable.

During the week of November 24, 2025, subsequent to the receipt by Tenax of the November 2025 Forecast, Messrs. Porcelain and Recca met with Mr. Foley and other representatives of Tenax to discuss the November 2025 Forecast, prospects for a turn-around in AIR’s performance, the economics of the earlier Tenax proposals and the strategic benefits to Tenax of a transaction with AIR. Messrs. Porcelain and Recca advised Mr. Foley that, given there were other active bidders and the differences in the structures of the bids, as well as certain benefits to AIR from a sale of assets that would be unavailable if it consummated the reverse merger transaction proposed by Tenax, it was important for Tenax to consider meaningfully improving its proposal to ensure that it would be viewed as Tenax’s highest and best offer by the AIR Board. During the discussion, Messrs. Porcelain and Recca advised Mr. Foley that a transaction structure offering both (i) an optional upfront cash consideration to AIR’s stockholders and (ii) a full cash put right would be viewed favorably and would be likely to receive serious consideration by the AIR Board. This feedback was provided by Messrs. Porcelain and Recca to convey the types of transaction features that the AIR Board and the Special Committee believed could enhance certainty of value and address stockholder liquidity considerations.

On December 1, 2025, in response to the request for final bids, Counterparty B submitted a proposal for the acquisition of substantially all of the assets and assumption of all of the liabilities of AIR for an enterprise valuation of $55,000,000. Counterparty B’s proposal also included a net working capital adjustment that would have reduced net cash consideration to AIR’s stockholders by approximately $2,000,000 to $4,000,000.

On December 2, 2025, Mr. Foley sent a letter to AIR reiterating Tenax’s proposal for a transaction pursuant to which Tenax would combine with AIR, with AIR surviving as a public company and the Tenax Members receiving 94.4 million shares of AIR common stock in exchange for 100% of the membership interests in Tenax. To provide potential liquidity to those stockholders of AIR seeking cash, Tenax offered to purchase from AIR’s stockholders at the time of the closing of the transaction up to one million shares of AIR common stock for $4.10 per share and to grant all holders of shares of AIR common stock immediately prior to the closing of the proposed transaction a right to require the combined company to purchase their shares, exercisable on or about the first anniversary of the merger at a price of $4.40 per share, if, during a 30-day measurement period, the average daily price of the shares is below $4.40 per share. Tenax also proposed that all funded debt of AIR would be repaid in connection with the merger, unless the holders of such debt elected to remain lenders to the combined company. In making its offer, based upon information previously provided by AIR, Tenax assumed AIR would have EBITDA of $6 million for 2026. As an alternative, if the reverse merger proposal made by Tenax was not acceptable to AIR, Mr. Foley proposed that Tenax would combine with AIR, with the Tenax Members receiving 94.4 million shares of AIR following a sale of AIR’s operating assets. As part of this alternative transaction, for AIR stockholders who prefer to receive cash in the transaction, the combined company following the merger would purchase up to one million shares of AIR common stock from such AIR stockholders for $4.10 per share plus the amount determined by subtracting $20.5 million from AIR’s net cash remaining at the time of the merger and dividing that result by 5,000,000. The combined company would also grant all holders of AIR shares immediately prior to the closing of the proposed transaction a right to require the combined company to purchase their shares, exercisable on or about the first anniversary of the merger at a price equal to 107.3% of the per share amount resulting from the above formula, if, during a 30-day measurement period, the average daily price of the shares were below such put price.

On December 3, 2025, after receiving the proposals from each of Counterparty B and Tenax, the Special Committee met to review and discuss various aspects of the proposals, which discussion included an evaluation of the potential benefits of a reverse merger transaction compared to a sale of AIR’s operating assets. The Special Committee considered the strategic, financial and execution risks associated with each alternative. Based on these discussions, the Special Committee advised the AIR Board that it believed a sale of only the operating assets would be difficult to achieve in a way that would enhance stockholder value and recommended that a full AIR Board meeting be convened to consider the two alternatives.

On December 5, 2025, the AIR Board met at AIR’s Bay Shore facility. All of the directors were present throughout the meeting. Representatives of Kipps joined the meeting via video conference. Representatives of Kipps distributed materials summarizing recent communications with the remaining bidders. In addition, representatives of Kipps provided preliminary and illustrative analyses of the bids submitted by Tenax and Counterparty B. Given the uncertainties of the discussions with Counterparty A, representatives of Kipps were not able to provide a meaningful financial analysis of any bid Counterparty A might make. Members of AIR management and AIR’s advisors discussed with the AIR Board various aspects related to the structural differences between the bids of Counterparty B and Tenax, one being a sale of assets and the other a merger, including possible tax implications of both transactions and certain uncertainties associated with a sale of assets, which could, in counsel’s opinion, result in AIR’s shares being delisted by NYSE American.

At its meeting on December 5, the AIR Board reviewed and compared the proposals received from the two remaining potential counterparties, Counterparty B, being an independent wealth fund, and Tenax, a successful participant in the aerospace and defense industry. The AIR Board noted that, based on its familiarity with the aerospace and defense industry and its financial resources, Tenax appeared better positioned to consummate a transaction on an accelerated timeline. In contrast, Counterparty B had indicated it would need to conduct extensive further due diligence, including an assessment of AIR’s working capital requirements prior to proceeding with a potential transaction. Counterparty B’s proposal included a potentially significant valuation deduction via a net working capital adjustment, which, combined with any reduction in price Counterparty B might seek as a result of its due diligence and the deterioration in AIR’s operating performance, caused the AIR Board to believe that ultimately the purchase price actually to be received from Counterparty B was likely to be significantly below its non-binding offer and that a favorable transaction was more likely to be consummated with Tenax as opposed to Counterparty B. In addition, given the successful track record of Tenax and its experience in the aerospace industry, the AIR Board believed that Tenax might succeed in increasing the value of the shares held by AIR’s stockholders and, in all events, was offering stockholders an opportunity to realize liquidity following a one-year holding period. Moreover, the AIR Board believed that the acquisition of AIR through a reverse merger was a central component of the plans of Tenax, as compared to the plans of Counterparty B, which was pursuing other unrelated acquisitions concurrently with the AIR transaction and which, at that time, had no other investments or experience in the aerospace industry. In addition, the AIR Board discussed that Tenax would be able to benefit from the expertise of AIR’s management and other personnel and any synergies between products and processes. On this basis, the AIR Board determined to move forward with Tenax to attempt to enter into a transaction.

On December 8, 2025, the AIR Board and representatives of Kipps met in Greenwich, Connecticut with Mr. Foley and members of the management of Tenax to further discuss Tenax’s business, financial performance and prospects. At the meeting, Mr. Foley gave a presentation regarding the current business of Tenax, its plans for expansion and Tenax’s financial wherewithal. Members of the AIR Board determined that Tenax had the financial capacity to complete the transaction envisioned and support AIR through an anticipated period of negative cash flow. In addition, at the meeting on December 8, 2025, the AIR Board concluded that Tenax and its team were dedicated to the aerospace industry and that AIR’s stockholders could benefit from Tenax’s expertise.

On December 9, 2025, upon being advised that AIR desired to move forward with a potential transaction with Tenax, Tenax advised that it required that AIR enter into an exclusivity agreement with Tenax before committing to expend the funds necessary to continue and potentially complete the process. On December 15, 2025, AIR and Tenax entered into an exclusivity agreement with respect to the proposed transaction. The exclusivity agreement provided for an exclusivity period through January 31, 2026, which would automatically extend through February 15, 2026 unless AIR delivered written notice of termination to Tenax on February 1, 2026. Pursuant to the exclusivity agreement, AIR was required to immediately cease all existing discussions and negotiations with any other party with respect to a potential acquisition of AIR and was prohibited from soliciting, encouraging or providing information to any other potential acquiror during the exclusivity period. Subsequent to the execution of the exclusivity agreement, the parties continued to conduct due diligence and financial reviews of their respective businesses.

On December 17, 2025, on behalf of AIR, Messrs. Porcelain, Scott Glassman and Recca and representatives of Kipps and Baker Tilly participated in a video conference with Mr. Foley and representatives of Forvis Mazars, LLP, on behalf of Tenax, to discuss various financial measurements of the operations of AIR and decisions made by AIR as to the allocation of certain expenses.

On December 18, 2025, Mr. Foley met with Messrs. Porcelain, Recca and Eric Lee of AIR at AIR’s facility in Barkhamsted, Connecticut to discuss operational issues at AIR’s facility in Barkhamsted.

On December 22, 2025, Cravath, Swaine & Moore LLP (“Cravath”), counsel to Tenax, delivered an initial draft of a term sheet setting forth the key provisions of the proposed transaction (the “December 22 Term Sheet”) to Ellenoff Grossman & Schole LLP (“EGS”), counsel to AIR. The December 22 Term Sheet provided that the transaction would be structured as a reverse triangular merger, pursuant to which a newly formed merger subsidiary of AIR would merge with and into Tenax, with Tenax surviving as a wholly owned subsidiary of AIR. The provisions of the December 22 Term Sheet generally were consistent with those contained in the Tenax letter of December 2, 2025, and provided a specific formula to determine the number of shares of AIR to be issued to the Tenax Members and the prices at which the combined company would (i) commence a tender offer for one million shares of AIR common stock upon consummation of the merger and (ii) redeem those shares put by holders of AIR’s common stock approximately one year after the merger. Specifically, the December 22 Term Sheet provided that AIR would issue 94.4 million shares of AIR common stock to the Tenax Members, subject to adjustment based upon (y) the number of shares of common stock and common stock equivalents AIR issued prior to consummation of the merger, other than an agreed upon pool to be awarded to AIR management, and (z) the excess of AIR’s outstanding indebtedness above $24.6 million at the time of completion of the merger. The December 22 Term Sheet contained other terms and provisions customary for a transaction such as the merger, including provisions with respect to the conduct of the business of AIR and Tenax pending the merger, a “no-shop” provision, the obligation of certain AIR stockholders and Tenax Members to support the proposed transaction, the right of the AIR Board to exercise its fiduciary rights and respond to a superior proposal, the conditions to each party’s obligation to consummate the merger, and the break-up fees and expense reimbursements to be paid to each party upon termination of the merger agreement.

On December 22, 2025, Messrs. Glassman, Porcelain and Recca and other representatives of AIR participated in a video conference with Kipps and representatives of Tenax during which the parties further discussed financial aspects of the operations of AIR and the potential impacts to the ongoing business of various fixed price contracts.

On December 28, 2025, EGS delivered a revised draft term sheet to Cravath that proposed revisions to certain of the economic and structural terms of the December 22 Term Sheet, including with respect to the mechanics for adjusting the merger consideration and the pricing of the tender offer and related stockholder liquidity rights, including AIR’s right to issue equity and equity derivatives during the period subsequent to execution of the merger agreement prior to closing.

On January 2, 2026, Cravath delivered a further revised draft term sheet to EGS (the “January 2 Term Sheet”), which reflected continued discussions between the parties and further refinement of the proposed transaction structure and economic terms, including the introduction of a debt-adjusted framework for determining merger consideration and stockholder liquidity pricing.

On January 5, 2026, the AIR Board and representatives of Kipps reviewed in detail the January 2 Term Sheet. During the week of January 5, 2026, Mr. Porcelain spoke with Mr. Foley regarding certain of the provisions of the January 2 Term Sheet. Shortly thereafter, AIR and Tenax determined that the parties had sufficiently clarified the key terms of the contemplated transaction, and the parties would begin to draft definitive documents in respect thereof.

On January 20, 2026, Mr. Foley and other representatives of Tenax met with members of AIR management to review the most recent financial forecasts that had been prepared by AIR and AIR’s plans for improving operations going forward.

Over the course of January and February 2026, the parties continued to review each other’s businesses and exchanged documents in connection with their respective due diligence efforts.

On January 23, 2026, the AIR Board met to review in detail the formula for adjusting the merger consideration contained in the January 2 Term Sheet. During the course of the meeting, it was noted that the adjustments would be based upon any issuances by AIR of equity and equity derivative securities prior to consummation of the merger

and any increase in the amount of AIR’s debt above an agreed upon floor, consistent with the forecasts previously provided to Tenax. During the meeting, representatives of Kipps reviewed preliminary and illustrative scenarios illustrating the impact on the number of shares to be issued based on various assumed increases in AIR’s outstanding indebtedness. In addition, Messrs. Glassman and Recca discussed certain operational issues at AIR and the likely need to increase debt to maintain operations over the first half of 2026. Based upon the presentations, consistent with previous discussions among the directors and officers of AIR, the AIR Board determined that it was probable that the adjustments would result in the issuance of more shares to Tenax than the 94.4 million shares referenced in the January 2 Term Sheet. The AIR Board also determined that it was probable that the price to be received by AIR’s stockholders for shares they might tender in the tender offer to be conducted at the time of the merger or redeem one year after the merger would be less than the prices in the January 2 Term Sheet. At the meeting, each of the AIR Board members confirmed that he understood that AIR’s debt was likely to increase in the foreseeable future and the impact this would have on the adjustment formula that determined the number of shares to be issued to Tenax.

On January 30, 2026, Cravath delivered an initial draft of the original merger agreement (the “January 30 Merger Agreement”) to EGS.

On February 3, 2026, EGS and Cravath conferred regarding certain timing and procedural issues with respect to the January 30 Merger Agreement.

On February 5, 2026, after conferring with AIR management, EGS delivered a revised draft of the original merger agreement to Cravath (the “February 5 Merger Agreement”).

On February 6, 2026, the AIR Board held a meeting at which EGS reviewed the February 5 Merger Agreement for the directors and certain provisions were discussed in detail. It was noted that the ultimate tax structure of the proposed transaction had yet to be agreed upon, as Tenax was still examining the tax implications of different alternatives and that there would be no financial impact to AIR’s existing stockholders from either alternative structure. In addition, Messrs. Recca and Porcelain again reviewed how the number of shares to be issued to the Tenax Members and the price to be received for shares tendered or redeemed by existing AIR stockholders would be determined, focusing on the impact of increases in AIR’s debt. During the course of this discussion, the directors reviewed the status of AIR’s operations, current cash requirements and likely requirements over the next twelve months.

On February 7, 2026, a further revised draft of the original merger agreement responsive to certain concerns noted by EGS and AIR was received from Cravath.

On the morning of February 9, 2026, the parties and their respective counsels participated in a video conference, which focused on outstanding due diligence items, the anticipated delivery dates for such materials, drafting of forms of ancillary agreements to be prepared prior to execution of the original merger agreement and other actions that would need to be accomplished in order to execute the original merger agreement.

On February 11, 2026, Cravath delivered a further revised draft of the original merger agreement (the “February 11 Merger Agreement”) that included a more detailed schedule for the closing of the merger and exchange of the financial information necessary to compute the number of AIR shares to be issued to the Tenax Members, as well as the prices to be paid in the tender offer and upon exercise of the Redemption Rights.

On February 13, 2026, the AIR Board held a videoconference meeting at which senior AIR management and representatives of EGS and Kipps were present (the “February 13 Board Meeting”). Prior to the February 13 Board Meeting, the AIR Board had been provided with the February 11 Merger Agreement. A representative of EGS reviewed with the AIR Board the nature and scope of the AIR Board’s fiduciary duties in the context of evaluating the February 11 Merger Agreement.

At the February 13 Board Meeting, representatives of Kipps presented their financial analysis and rendered to the AIR Board Kipps’s oral opinion that as of that date and based upon and subject to the assumptions, limitations, qualifications and conditions described in Kipps’s written opinion (a draft of which had been provided before the AIR Board meeting), the unadjusted redemption price of $4.21 was fair, from a financial point of view, to the holders of AIR common stock (the “Kipps Oral Fairness Opinion”).

The AIR Board recognized that the actual redemption price would be determined pursuant to the original merger agreement and calculated based on a formula set forth in the original merger agreement prior to closing. AIR management instructed Kipps to assume that AIR’s net indebtedness at closing would equal $24,600,000, resulting in a calculated unadjusted redemption price of $4.21 per share, though the AIR Board determined that it would be likely that AIR’s net indebtedness at closing would exceed $24,600,000 and the amount of AIR’s net indebtedness as of December 31, 2025. The AIR Board permitted this assumption to enable Kipps to provide the analyses supporting its opinion, which the AIR Board could then use in considering the alternatives available to AIR in light of what the AIR Board believed AIR’s net indebtedness would be through the balance of 2026.

The AIR Board and representatives of EGS and Kipps discussed reasons for accepting the terms offered by Tenax rather than remaining independent or resuming negotiations with another party. As part of this discussion, members of the AIR Board and representatives of Kipps offered their perspectives on the terms of the February 11 Merger Agreement, including the potential liquidity through the tender offer and Redemption Rights, subject to the terms and conditions thereof. In particular, the grant of the Redemption Rights would allow current stockholders to retain their shares and potentially benefit from any increase in the price of the AIR common stock, while providing an opportunity to receive the agreed upon redemption price if the trading price of AIR common stock declined. The AIR Board also noted that the revenues of AIR remained depressed and that Webster Bank had recently announced its acquisition by Santander Bank and was exiting the asset based lending business, and accordingly was not inclined to extend AIR’s credit facility. On that basis, the AIR Board noted that, if AIR did not complete the merger, it likely would need to seek to raise additional capital to fund operations, whether through debt or equity financing. The AIR Board recognized that the terms of any debt would be less favorable to AIR than those of its current credit facility and, if AIR sought to offer equity, in light of its current performance, the price likely would be substantially below the then-current trading price of AIR’s common stock. The AIR Board also noted that Kipps, an internationally recognized investment banking firm in the aerospace and defense industries, had made a significant effort to market AIR, contacting 220 prospective counterparties, of which only 8 submitted non-binding indications of interest in moving forward with an acquisition of AIR. Following such discussion and deliberation, the AIR Board unanimously (i) determined that the February 11 Merger Agreement and the transactions contemplated thereby were fair to and in the best interests of AIR and its stockholders, (ii) adopted the February 11 Merger Agreement and approved the transaction documents thereunder and the transactions contemplated thereby and (iii) resolved to recommend that AIR’s stockholders vote in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

In making its determination, the AIR Board considered the limitations of the Kipps Oral Fairness Opinion, including that the opinion was based upon an assumed amount of AIR’s net indebtedness and AIR’s financial results as of December 31, 2025, and therefore did not reflect subsequent developments. In addition, the AIR Board had been advised by management that AIR’s business was expected to deteriorate further in 2026 and that as a result of anticipated increases in AIR’s indebtedness, the number of shares to be issued upon consummation of the merger agreement would likely exceed the number of shares that would be issued based upon AIR’s financial statements as of December 31, 2025. Management also advised the AIR Board of the significant risks and uncertainties regarding AIR’s ability to obtain the capital necessary to maintain its operations, including the timing and terms on which such capital might be available. In light of these considerations, the AIR Board recognized that the analyses underlying the Kipps Oral Fairness Opinion were based on assumptions that might not reflect AIR’s future financial condition and concluded that entering into the merger agreement, even if the eventual redemption price was materially lower than the value implied by such analysis, was in the best interests of AIR and its stockholders.

Following the conclusion of the February 13 meeting of the AIR Board, AIR received from Cravath a further revised draft of the original merger agreement (the “February 13 Merger Agreement”). The changes from the February 11 Merger Agreement were largely ministerial, and were intended to permit holders of certain warrants issued by Tenax to elect to delay exercising such warrants until after consummation of the merger without otherwise affecting the terms of the merger agreement. In addition, the February 13 Merger Agreement reflected an increase in the target amount of AIR common stock used in the formula for determining the Debt Adjusted AIR Share Price, which resulted in a lower implied Debt Adjusted AIR Share Price and, accordingly, a lower implied redemption price. EGS distributed the February 13 Merger Agreement, together with a summary to the members of the AIR Board. To ensure that each director understood the revisions and continued to support proceeding with the merger, an additional meeting of the AIR Board was held at 4:00 p.m. Eastern time on February 16, 2026, which was attended by all of the directors, senior management and representatives of EGS. EGS reviewed for the directors all of the revisions in the February 13 Merger Agreement. Following discussion of the revisions, the AIR Board

concluded there were no substantive changes from the February 11 Merger Agreement that might affect the benefits of the merger to the AIR stockholders and resolved to approve the February 13 Merger Agreement, and confirmed that all actions taken by the AIR Board at its meeting on February 13 remained in the best interests of AIR and its stockholders.

Following this meeting, Messrs. Porcelain and Foley confirmed that both parties were prepared to move forward, and the original merger agreement was executed.

On February 17, 2026, before the opening of trading on the NYSE American, AIR and Tenax issued a joint press release announcing the execution of the original merger agreement.

On that same date, Kipps delivered a written opinion and updated presentation, each dated February 17, 2026, confirming that as of the date of such opinion, and based upon and subject to the assumptions, limitations, qualifications and conditions set forth therein, the unadjusted redemption price of $4.18 was fair, from a financial point of view, to the holders of AIR common stock (the “Kipps Written Fairness Opinion”). The Kipps Written Fairness Opinion reflected a decrease from the $4.21 unadjusted redemption price used by Kipps in rendering the Kipps Oral Fairness Opinion. The Kipps Written Fairness Opinion reflected a decrease from the $4.21 unadjusted redemption price used by Kipps in rendering the Kipps Oral Fairness Opinion as a result of an increase in the number of shares of common stock constituting the AIR Share Target Amount used to calculate the Debt Adjusted AIR Share Price, to 5,256,325, the amount set forth in the executed original merger agreement, from 5,229,125, the amount contained in the February 13 Merger Agreement, which was used by Kipps in calculating the unadjusted redemption price for purposes of delivering its earlier oral opinion.

Over the course of February, March and April of 2026, AIR, Tenax and their respective legal counsel collaborated in drafting a preliminary proxy statement relating to the merger. On May 5, 2026, AIR filed a preliminary proxy statement with the SEC relating to the merger. On May 19, 2026, SEC staff informed AIR’s legal counsel that the SEC would not be commenting on the preliminary proxy statement.

Over the course of June 2026, AIR and Tenax discussed amending the original merger agreement to, among other things, replace the net indebtedness-based formula for determining the merger consideration with a fixed number of shares of AIR common stock, eliminate the previously contemplated tender offer, effect a reverse stock split of AIR common stock prior to the closing, and file a registration statement on Form S-4 with respect to the shares of AIR common stock to be issued to the Tenax Members as merger consideration.

As described above, the original merger agreement contained a formula-based mechanism for determining the merger consideration (pursuant to which the number of shares of AIR common stock to be issued to the Tenax Members would be adjusted based on, among other things, changes in AIR’s net indebtedness between signing and closing) and contemplated that, following the closing, AIR would commence a tender offer to purchase up to one million shares of AIR common stock from AIR stockholders at a price determined in accordance with a formula tied to AIR’s net indebtedness. In connection with the June 2026 discussions, the parties and their respective counsels considered the risks and uncertainties associated with these formula-based mechanisms, including the risk that AIR’s net indebtedness could increase prior to the closing in a manner that would reduce the certainty and predictability of the merger consideration and the tender offer price. In addition, as the parties and their advisors evaluated the combined company’s ability to satisfy the listing requirements of the NYSE American following the closing, including (i) the initial listing requirement under Section 101 of the NYSE American Company Guide that shares of common stock have a minimum price of $4.00 per share and (ii) the continued listing requirements under Section 1003 of the NYSE American Company Guide that the combined company have at least 200,000 publicly-held shares, at least 300 holders of publicly-held shares and an aggregate market value of publicly-held shares of at least $1 million, concerns arose regarding the previously contemplated structure.

Specifically, the parties were concerned that if a significant number of AIR stockholders tendered their shares in the post-closing tender offer, the resulting reduction in the number of publicly-held shares could cause either the number of publicly-held shares, the number of holders of such shares or the aggregate market value of such shares to fall below the minimum requirements for continued listing on the NYSE American. Given that insiders of the combined company were expected to collectively own approximately 75% of the outstanding shares of the combined company following the merger, the number of shares held by non-insiders available to satisfy these requirements was already expected to be limited. The tender offer, by further reducing the number of shares held by non-insider public stockholders, presented a meaningful risk that the combined company would fail to satisfy the NYSE American’s

continued listing standards. The parties also discussed the risk that a reduction in the public stockholder base could adversely affect the liquidity and trading price of AIR common stock following the merger, as well as the combined company’s ability to attract institutional investor interest.

In light of these concerns, the parties determined that replacing the formula-based merger consideration with a fixed number of shares; eliminating the tender offer and instead relying on the Redemption Rights, exercisable approximately one year after the closing, as the sole stockholder liquidity mechanism under the merger agreement; effecting a reverse stock split; and filing a registration statement on Form S-4 to register the shares of AIR common stock to be issued to the Tenax Members would collectively increase the number of unrestricted publicly-held shares and satisfy the $4.00 minimum share price requirement for purposes of satisfying the initial listing requirements of the NYSE American while preserving a meaningful liquidity opportunity for existing AIR stockholders. On June 25, 2026, the AIR Board met and approved the proposed revised commercial terms.

On June 29, 2026, Cravath delivered a draft of the merger agreement (the “June 29 Merger Agreement”) to EGS which, among other things, (i) set the merger consideration at 126,900,000 shares of AIR common stock (which number will be adjusted to 25,380,000 shares after giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split described in this proxy statement/prospectus); (ii) revised the definition of Debt Adjusted AIR Share Price to be fixed at $3.05 ($15.25 after giving effect to the reverse stock split), rather than calculated pursuant to a formula based on AIR net indebtedness; (iii) eliminated the tender offer that the parties previously contemplated AIR would commence following the closing; and (iv) included a requirement for AIR to file a registration statement on Form S-4 with respect to the shares of AIR common stock to be issued to the Tenax Members as merger consideration and added a condition to closing that such registration statement have become effective under the Securities Act and not be subject to any stop order. The June 29 Merger Agreement further provided that, if AIR effected the reverse stock split or any other subdivision, stock dividend, split, combination, recapitalization, reclassification or similar change to its common stock on or after February 16, 2026 and prior to the closing, the merger consideration, the Debt Adjusted AIR Share Price and the other amounts payable under the merger agreement would be appropriately and equitably adjusted to preserve the same economic effect for the Tenax Members. Later that day EGS provided comments on the June 29 Merger Agreement. On June 30, 2026, Cravath delivered a revised draft of the amended and restated merger agreement to EGS (the “June 30 Merger Agreement”), which reflected the resolution of EGS’s comments.

On July 2, 2026, the AIR Board held a meeting at which representatives of EGS reviewed the June 30 Merger Agreement and the revisions from the original merger agreement. During the course of the meeting the AIR Board, management and EGS discussed reasons for accepting the revised terms set forth in the merger agreement and other alternatives available to AIR. During the discussion, amongst other items, members of management noted the dilution to the current AIR stockholders that would occur as a result of the merger, the fact that the merger agreement required that AIR amend its articles of incorporation to permit stockholder action by written consent under conditions specified in the proposed resolution, that the current holders of AIR common stock would continue to be afforded the opportunity to cause the combined company to redeem their shares pursuant to the redemption rights agreement, subject to the terms and conditions thereof, and that the revised terms appeared to provide the most certain path to meeting the initial listing requirements of NYSE American as opposed to other possible actions. Following discussion, the AIR Board unanimously (i) determined that the June 30 Merger Agreement and the Transactions contemplated thereby were fair to and in the best interests of AIR and its stockholders, (ii) adopted the June 30 Merger Agreement and approved the transaction documents and the Transactions and (iii) resolved to recommend that AIR’s stockholders vote in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

Later on July 2, 2026, following the meeting of the AIR Board, AIR, Merger Sub and Tenax entered into the merger agreement, which amended and restated the original merger agreement in its entirety.

On July 22, 2026, AIR made its initial filing with the SEC of the registration statement of which this proxy statement/prospectus forms a part. On July 24, 2026, SEC staff informed AIR’s legal counsel that the SEC would be reviewing and providing a comment letter with respect to the preliminary version of the registration statement of which this proxy statement/prospectus forms a part.

Following that notification, representatives of AIR and Tenax, together with their respective counsels, discussed the anticipated effect of the SEC’s review on the expected timeline for consummation of the merger. In the course of those discussions, the parties considered, among other things, (i) the anticipated timing of the receipt of the SEC’s

comment letter with respect to the preliminary proxy statement/prospectus, (ii) the amount of time expected to be required to prepare and file responses to the SEC’s comments and to file an amendment to the registration statement of which this proxy statement/prospectus forms a part, together with any additional time that could be required to resolve any further comments from the SEC staff, (iii) the amount of time expected to be required, following the effectiveness of the registration statement, to set a record date for the special meeting and to notify and coordinate with the proxy solicitor and (iv) the amount of time expected to be required to complete the mailing of this proxy statement/prospectus to shareholders, to solicit proxies and to convene and hold the special meeting.

Based on these considerations, the parties concluded that it would likely not be practicable to complete the merger on or prior to September 30, 2026, the outside date then specified in the merger agreement, and determined that an extension of the outside date was advisable in order to preserve the ability of the parties to complete the merger in accordance with the terms of the merger agreement. Accordingly, the parties agreed to amend the merger agreement solely to extend the outside date from September 30, 2026 to November 30, 2026.

On July 31, 2026, following a meeting of the AIR Board, AIR, Merger Sub and Tenax entered into this amendment to the merger agreement.

Recommendation of the AIR Board; AIR’s Reasons for the Merger

At a meeting held on July 2, 2026, the AIR Board unanimously (i) determined that the merger agreement and the Transactions are fair to and in the best interests of AIR and its stockholders; (ii) adopted the merger agreement and approved the transaction documents and the Transactions; (iii) resolved to recommend that the stockholders of AIR vote in favor of the stock issuance proposal, the authorized shares proposal and the written consent proposal, in each case, on the terms and subject to the conditions set forth in the merger agreement; and (iv) directed that such matters be submitted to the stockholders of AIR for approval.

The AIR Board recommends that you vote “FOR” the stock issuance proposal; “FOR” the authorized shares proposal; “FOR” the written consent proposal; “FOR” the transaction compensation proposal and “FOR” the adjournment proposal.

In evaluating the Transactions, the AIR Board consulted with AIR’s management and legal and financial advisors to AIR and, in reaching its decision, the AIR Board considered a number of factors, both positive and negative, and potential benefits and risks involved with the merger agreement and the Transactions. Throughout 2025 and the first half of 2026, the AIR Board had considered AIR’s financial performance, AIR’s ability to service and refinance its existing indebtedness and, in light of these circumstances, the need to pursue a strategic transaction. In June 2025, the AIR Board initiated a process to pursue a transaction that would enhance value for AIR’s stockholders. The decision of the AIR Board to enter into the merger agreement was the result of careful consideration by the Board of numerous factors weighing positively in favor of the merger, including the following principal factors:

•        AIR began the process of soliciting potential transaction counterparties in June 2025 and Kipps contacted 220 potential counterparties, and only eight potential counterparties submitted written preliminary proposals, confirming that the pool of potential counterparties was limited;

•        of the potential counterparties that submitted proposals, only Tenax proposed a reverse merger that would enable AIR’s stockholders to realize a benefit from AIR’s status as a company listed on the NYSE American;

•        other transaction structures, such as an asset sale, may have subjected AIR to delisting from the NYSE American, thereby eliminating any perceived value attributable to its status as a listed company;

•        the expectation that the combined company will have significantly higher revenues;

•        the expectation that the combined company will have increased resources to invest in future acquisitions and other growth opportunities in comparison to AIR on a stand-alone basis;

•        the expectation that the combined company will have the financial resources to enable it to access the credit markets at rates more favorable to AIR than those that are likely to be available to AIR on a stand-alone basis;

•        the resulting equity stake in the combined company to be held by AIR’s stockholders upon completion of the merger and the ability of AIR’s stockholders to elect to require the combined company to redeem their shares, which are the result of arm’s-length negotiations;

•        the AIR Board’s belief that the merger consideration and the structure of the transaction represent Tenax’s best and final offer;

•        the expectation that the potential opportunities for the combined company to solicit and receive contract awards are greater than the opportunities currently available to AIR on a stand-alone basis;

•        the terms of the Transactions provide AIR stockholders with a continuing equity stake in the combined company that provides AIR stockholders the opportunity to realize potential future share price growth and the potential for liquidity through Redemption Rights if they elect to cause the combined company to redeem their shares of AIR common stock;

•        the AIR Board’s knowledge of AIR’s business, operations, financial condition, earnings and prospects and its knowledge of Tenax’s business, operations, financial condition, earnings and prospects, based on the results of AIR’s due diligence review of Tenax;

•        the terms and conditions of the merger agreement, including the commitments by both AIR and Tenax to complete the Transactions and the likelihood of closing;

•        the fact that the obligation of Tenax to consummate the closing under the merger agreement is not subject to a financing condition, and the AIR Board’s determination that Tenax has sufficient financial resources to cover (i) payment of AIR’s existing credit facilities and (ii) the fees and expenses reasonably expected to be incurred in connection with the merger;

•        the limited number of approvals required from regulatory agencies and the likelihood that such approvals will be received without the imposition of terms and conditions that adversely affect the business and financial results of the combined company; and

•        the fact that the merger agreement does not preclude a third party from making an unsolicited proposal for a competing transaction with AIR and that, under specified circumstances, AIR may furnish non-public information to and enter into discussions with such a third party regarding the competing transaction and the AIR Board may withdraw or modify its recommendations to our stockholders regarding the merger, including a recommendation to terminate the merger agreement in favor of entering into a competing transaction (subject to a termination fee).

The AIR Board also weighed the factors described above against a number of risks and other factors identified in its deliberations as weighing negatively against the merger, including:

•        restrictions on the conduct of AIR’s business during the period between the execution of the merger agreement and the completion of the merger;

•        the costs associated with the completion of the merger, including management’s time and energy and potential opportunity costs, and the risk of the failure to realize the benefits expected to be obtained in connection with the merger;

•        the effect of any failure to complete the merger, including potential termination fees and stockholder and market reactions;

•        the challenges inherent in the combination of two businesses of the size and complexity of AIR and Tenax, including disruption to their respective businesses and commercial relationships, and the possible diversion of management attention for an extended period of time;

•        the fact that, upon completion of the merger, the AIR Board will be composed of no fewer than eight directors, with at least six of such directors identified by the Tenax Members and two of such directors subject to the approval of Tenax;

•        the fact that, after the merger, holders of the common stock of AIR as of immediately prior to the effective time of the merger would collectively hold only approximately 4% of the common stock of the combined company on a fully diluted basis, and the combined company would effectively be controlled by a majority stockholder;

•        the dilution of the overall interest of the public stockholders in the combined company following the merger and the resulting diminution in their aggregate interest in the future growth of the combined company;

•        the risk that the lack of a public market for the membership interests of Tenax makes it difficult to evaluate the fairness of the merger and the Tenax Members may receive consideration in the merger that is more than the fair market value of their membership interests;

•        uncertainties with respect to certain aspects of the business of Tenax and the AIR Board’s lack of deep experience with the business of Tenax;

•        uncertainties with respect to certain aspects of the business of AIR and the lack of deep experience with the business of AIR on the part of the management of Tenax;

•        the merger agreement precludes AIR from actively soliciting alternative proposals; and

•        the termination fee and the obligation of AIR to reimburse Tenax for certain expenses may discourage third parties that might otherwise be interested in a business combination with, or acquisition of, AIR from making alternative proposals.

The AIR Board also considered the interests that the executive officers and directors of AIR have with respect to the merger in addition to their interests as stockholders of AIR generally (see the section entitled “— Interests of AIR’s Directors and Executive Officers in the Merger” beginning on page 51 of this proxy statement/prospectus).

Although the foregoing discussion sets forth the principal factors considered by the AIR Board in reaching its recommendation, it is not intended to be exhaustive and may not include all of the factors considered by the AIR Board, and each director may have considered different factors or given different weight to each factor. The above factors are not presented in any order of priority. In view of the variety of factors, the amount of information and the complexity of the matters considered, the AIR Board did not find it practicable to, and did not, make specific assessments of, or assign relative weights to, the specific factors considered in reaching its recommendation. The explanation of the reasoning of the AIR Board and certain information presented in this section are forward-looking in nature and should be read in light of the factors discussed in the section entitled “Cautionary Statement Regarding Forward-Looking Statements” beginning on page 32 of this proxy statement/prospectus.

After careful consideration, the AIR Board unanimously (i) determined that the merger agreement, the merger and the other Transactions are fair to and in the best interests of AIR and its stockholders and (ii) authorized, approved and declared advisable the merger agreement, the merger and the other Transactions, on the terms and subject to the conditions set forth in the merger agreement. Accordingly, the AIR Board unanimously recommends that AIR’s stockholders vote “FOR” the stock issuance proposal, the authorized shares proposal, the written consent proposal, the transaction compensation proposal and the adjournment proposal.

Interests of AIR’s Directors and Executive Officers in the Merger

In considering the recommendation of the AIR Board, AIR stockholders should be aware that AIR’s directors and executive officers have interests in the proposed merger that are different from, or in addition to, any interests they may have as stockholders. The AIR Board was aware of the different or additional interests set forth below (other than any interests that arose following AIR’s entry into the merger agreement) and considered such interests along with other matters in approving the merger agreement and the transactions contemplated by the merger agreement.

AIR’s executive officers for the purpose of the discussion below are Scott Glassman (Acting Chief Executive Officer and President) and Brian Drisgula (Vice President of Finance). In accordance with SEC rules, this discussion also covers former directors and executive officers of AIR who served in such capacity at any time since January 1, 2025, which consists solely of Luciano Melluzzo (former President and Chief Executive Officer).

Subordinated Notes

Michael Taglich and Robert Taglich, directors of AIR, hold subordinated notes in the aggregate principal amount of $4,871,000 (the “Subordinated Notes”), of which $2,519,000 is convertible at the option of the holder into AIR common stock at $15.00 per share and $1,802,000 is convertible at the option of the holder into AIR common stock at $9.30 per share, and $550,000 is non-convertible. The Subordinated Notes mature December 1, 2026. Webster Bank, our principal lender, has required that payment of the amounts due pursuant to the Subordinated Notes be subordinated to payment of amounts owed under AIR’s credit facility. Tenax has agreed in the merger agreement that it or one of its affiliates will pay, or cause to be paid, our outstanding indebtedness, including the amount payable to Webster Bank and the Subordinated Notes in connection with the closing of the merger.

Treatment of AIR Equity Awards

Pursuant to the merger agreement, AIR Equity Awards, including those held by directors and executive officers, that are outstanding as of immediately prior to the effective time will continue on the same terms and conditions as were applicable to such AIR Equity Awards as of immediately prior to the effective time. These terms and conditions generally provide that if an award holder is terminated without “cause” within two years following the effective time, any unvested portion of his or her AIR Equity Awards will become fully vested. In addition, any vested options will generally remain exercisable until the earlier of the expiration date of the option and the date that is three months from such termination (or, in the case of termination due to death or permanent disability, a one- to three-year post-termination exercise period).

The table below sets forth, by type of AIR Equity Award, for each AIR director, an estimate of the aggregate value of such AIR Equity Awards granted that may be held by such individual at the effective time. The amounts set forth in the table below have been determined based on the number of AIR Equity Awards held by each individual as of August 31, 2026, assuming that (i) the price per share of AIR common stock is $3.07, which represents the five-day average closing price following the announcement of the merger, (ii) the effective time occurs on November 1, 2026, which is the assumed closing date only for purposes of this compensation-related disclosure and (iii) the individuals included in the tables below do not receive any additional grants of AIR Equity Awards or forfeit any AIR Equity Awards prior to November 1, 2026; however, the values in the table below do reflect the expected vesting of AIR Equity Awards prior to such date.

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(1)      These amounts do not reflect vested but not yet settled AIR RSUs, which consist of 60,791 vested AIR RSUs held by Mr. Porcelain and 12,159 vested AIR RSUs issued to each other director, which will be settled on February 12, 2027.

(2)      Excludes any AIR stock options for which the exercise price is equal to or greater than the assumed stock price of $3.07.

Mr. Drisgula does not hold any AIR Equity Awards. For information regarding the AIR RSUs and unvested AIR stock options held by Messrs. Scott Glassman and Luciano Melluzzo, see the section entitled “— Potential Payments to AIR’s Named Executive Officers Upon Completion of the Merger” beginning on page 53 of this proxy statement/prospectus. All vested AIR stock options held by directors and executive officers other than those reflected in the table above have an exercise price in excess of $3.07.

Severance Benefits for Luciano Melluzzo

On March 11, 2026, Mr. Luciano Melluzzo resigned from his positions as President and Chief Executive Officer of AIR and from all other positions he held with AIR and its subsidiaries. In connection with his resignation, Mr. Melluzzo entered into a Separation and Release Agreement, dated March 13, 2026, which provides for (i) cash severance equal to two months’ base salary ($64,310.14) and (ii) the issuance of 12,159 shares of AIR common stock in respect of the accelerated settlement of vested AIR RSUs granted on February 12, 2026.

Arrangements with Tenax

As of the date of this proxy statement/prospectus, none of AIR’s directors or executive officers has entered into any agreement, arrangement or understanding with Tenax or any of its affiliates regarding employment, or providing for any compensation or benefits, following the effective time, and the merger is not conditioned upon any such agreement, arrangement or understanding being entered into.

Continuing Employee Benefits

The merger agreement provides for certain customary protections regarding the compensation and benefits of employees of AIR, including AIR’s executive officers, during their employment with AIR and its affiliates following the effective time for a period of up to one year. These provisions are described in more detail in the section entitled “The Merger Agreement — Employee Matters” beginning on page 79 of this proxy statement/prospectus.

Directors’ and Officers’ Indemnification

Pursuant to the terms of the merger agreement, directors and executive officers of AIR will be entitled to certain ongoing indemnification and coverage under directors’ and officers’ liability insurance policies following the merger. For a more detailed description of the provisions of the merger agreement relating to directors’ and officers’ indemnification, please see the section entitled “The Merger Agreement — Directors’ and Officers’ Indemnification and Insurance” beginning on page 79 of this proxy statement/prospectus.

Potential Payments to AIR’s Named Executive Officers Upon Completion of the Merger

This section sets forth the information required by Item 402(t) of SEC Regulation S-K regarding the compensation of each of AIR’s Named Executive Officers that is based on or otherwise relates to the merger and that will or may become payable to the Named Executive Officers at either the consummation of the merger or upon a qualifying termination of employment upon or following the consummation of the merger.

The table below sets forth, for the purposes of this merger-related compensation disclosure, the amount of payments and benefits that each Named Executive Officer would receive at the effective time based on the following assumptions:

•        the effective time occurs on November 1, 2026, which is the assumed closing date only for purposes of this compensation-related disclosure;

•        the number of unvested AIR Equity Awards held by each Named Executive Officer is determined as of August 31, 2026, the latest practicable date to determine such amounts before the filing of this proxy statement/prospectus, less any awards expected to vest in the ordinary course prior to November 1, 2026, and assuming no additional grants or forfeitures of AIR Equity Awards prior to November 1, 2026; and

•        the price per share of AIR common stock is $3.07, which represents the five-day average closing price following the announcement of the merger.

The calculations in the table do not include amounts that AIR’s Named Executive Officers were already entitled to receive or were vested in as of the date of this proxy statement/prospectus. Moreover, as a result of the foregoing assumptions which may or may not actually occur or be accurate on the relevant date, the actual amounts, if any, to be received by a Named Executive Officer may materially differ from the amounts set forth below.

For the purposes of this disclosure, “double-trigger” refers to payments that require two conditions, which are the consummation of the merger and a qualifying termination of employment, and “single-trigger” refers to payments or benefits that solely arise as a result of the consummation of the merger.

Golden Parachute Compensation

____________

(1)      For Mr. Glassman, the amounts set forth in the table reflect the aggregate dollar value of AIR common stock in respect of his unvested AIR Equity Awards, which will vest upon a termination without cause within two years following the effective time. These are therefore “double-trigger” payments. This amount excludes a grant of 12,159 vested RSUs to Mr. Glassman on February 12, 2026, which will be settled on February 12, 2027, because this grant was not made in connection with the merger.

(2)      Mr. Melluzzo resigned from his position as the President and Chief Executive Officer of the Company, effective March 11, 2026, and is no longer entitled to any payments or benefits in connection with the merger.

Interests of Certain Participants in the Solicitation

Our directors and executive officers may solicit proxies by telephone or otherwise in respect of the proposals to be considered at the special meeting and may be deemed to have been “participants” under the SEC rules in regard to such solicitation of AIR stockholders. AIR stockholders should be aware that all of the directors and Messrs. Glassman and Drisgula have interests in the merger that may be different from, or in addition to, those of AIR stockholders generally. All of our directors and Mr. Glassman will benefit from the treatment of outstanding AIR RSUs and AIR stock options and Michael Taglich and Robert Taglich will benefit from the payment of Subordinated Notes held by them as more fully described under “The Merger — Interests of AIR’s Directors and Executive Officers in the Merger” beginning on page 51 of this proxy statement/prospectus. In addition, AIR’s directors and executive officers will benefit from the indemnification and insurance arrangements described under “The Merger Agreement — Directors’ and Officers’ Indemnification and Insurance” beginning on page 79 of this proxy statement/prospectus.

Opinion of AIR’s Financial Advisor

AIR retained Kipps to act as its financial advisor in connection with the Transactions. As part of this engagement, the AIR Board requested that Kipps evaluate the fairness to the holders of the AIR common stock, from a financial point of view, of the redemption price. At the meeting of the AIR Board on February 13, 2026, Kipps rendered its oral opinion to the AIR Board that as of the date of such opinion and based upon and subject to the assumptions, limitations, qualifications and conditions described in Kipps’s written opinion, an unadjusted redemption price of $4.21 was fair, from a financial point of view, to the holders of the AIR common stock. On February 17, 2026, Kipps delivered to the AIR Board a written opinion and an updated presentation, each dated February 17, 2026, confirming that, as of the date of such opinion and based upon and subject to the assumptions, limitations, qualifications and conditions described in such opinion, an unadjusted redemption price of $4.18 was fair, from a financial point of view, to the holders of the AIR common stock.

The full text of the written opinion of Kipps, dated February 17, 2026, which sets forth, among other things, the procedures followed, assumptions made, matters considered and qualifications and limitations on the scope of review undertaken in rendering its opinion, is attached as Annex B and is incorporated herein by reference into this proxy statement/prospectus in its entirety. The summary of the opinion of Kipps in this proxy statement/prospectus is qualified in its entirety by reference to the full text of the written opinion. You are urged to read Kipps’s opinion carefully and in its entirety. Kipps’s opinion was addressed to, and provided for the information and benefit of, the AIR Board (in its capacity as such) in connection with its evaluation of the Original Transactions. The opinion does not constitute a recommendation to the AIR Board or to any other persons in respect of the Original Transactions or the Transactions, including as to how any holder of shares of AIR common stock should vote or act in respect of the Original Transactions or the Transactions. Kipps’s opinion does not address the relative merits

of the Original Transactions or the Transactions as compared to other business or financial strategies that might be available to AIR, nor does it address the underlying business decision of AIR to engage in the Original Transactions or the Transactions.

AIR stockholders should be aware that with the consent of the AIR Board, Kipps’s opinion was based on an assumed unadjusted redemption price of $4.18 per share, which was calculated based on a formula set forth in the original merger agreement prior to its amendment and restatement and assuming, at the direction of AIR’s management, that AIR’s net indebtedness at closing equals $24,600,000. The actual redemption price will be $3.27, which is materially lower than the $4.18 per share on which Kipps rendered its fairness opinion.

In connection with rendering its written opinion, Kipps, among other things:

•        reviewed certain publicly available business and financial information relating to AIR that Kipps deemed to be relevant, including publicly available research analysts’ estimates;

•        reviewed certain internal projected financial data relating to AIR prepared and furnished to Kipps by management of AIR, each as approved for Kipps’s use by AIR (the “Forecasts”);

•        discussed with management of AIR their assessment of the past and current operations of AIR, the current financial condition and prospects of AIR, and the Forecasts;

•        reviewed the reported prices and the historical trading activity of the AIR common stock;

•        compared the financial performance of AIR and its stock market trading multiples with those of certain other publicly traded companies that Kipps deemed relevant;

•        compared the financial performance of AIR and the valuation multiples relating to the unadjusted redemption price with the financial terms, to the extent publicly available, of certain other transactions that Kipps deemed relevant;

•        reviewed the financial terms and conditions of a draft, dated as of February 16, 2026, of the original merger agreement, including Exhibit H thereto; and

•        performed such other analyses and examinations and considered such other factors that Kipps deemed appropriate.

For purposes of Kipps’s analysis and opinion, Kipps assumed and relied upon the accuracy and completeness of the financial and other information publicly available, and all of the information supplied or otherwise made available to, discussed with or reviewed by Kipps, without any independent verification of such information (and Kipps did not assume responsibility or liability for any independent verification of such information), and further relied upon the assurances of the management of AIR that they were not aware of any facts or circumstances that would make such information inaccurate or misleading. With respect to the Forecasts, Kipps assumed with the consent of the AIR Board that the Forecasts were reasonably prepared on bases reflecting the best currently available estimates and good faith judgments of the management of AIR as to the future financial performance of AIR and the other matters covered thereby. Kipps expressed no view as to the Forecasts or the assumptions on which they were based.

For purposes of Kipps’s analysis and opinion, Kipps assumed, in all respects material to its analysis, that the final executed original merger agreement would not differ from the draft original merger agreement reviewed by Kipps, that the final executed redemption rights agreement would not differ from the draft terms and conditions set forth on Exhibit H of the original merger agreement reviewed by Kipps, that the representations and warranties of each party contained in the original merger agreement were true and correct, that each party would perform all of the covenants and agreements required to be performed by it under the original merger agreement and redemption rights agreement and that all conditions to the consummation of the Original Transactions, including the redemption, would be satisfied without waiver or modification thereof. Kipps further assumed, in all respects material to its analysis, that all governmental, regulatory or other consents, approvals or releases necessary for the consummation of the Original Transactions, including the redemption, would be obtained without any delay, limitation, restriction or condition that would have an adverse effect on AIR or the consummation of the Original Transactions, including the redemption, or reduce the contemplated benefits of the Original Transactions, including the Redemption Rights, to holders of AIR common stock.

Kipps did not conduct a physical inspection of the properties or facilities of AIR and did not make or assume any responsibility for making any independent valuation or appraisal of the assets or liabilities (including any contingent, derivative or other off-balance sheet assets and liabilities) of AIR, nor was Kipps furnished with any such valuations or appraisals, nor did Kipps evaluate the solvency or fair value of AIR under any state or federal laws relating to bankruptcy, insolvency or similar matters. Kipps’s opinion was necessarily based upon information made available to Kipps as of the date of its opinion and financial, economic, market and other conditions as they existed and could be evaluated on the date of its opinion. Developments subsequent to Kipps’s opinion could affect its opinion and Kipps did not and does not have any obligation to update, revise or reaffirm its opinion.

Kipps was not asked to pass upon, and expressed no opinion with respect to, any matter other than the fairness to the holders of the AIR common stock, from a financial point of view, of the unadjusted redemption price. Kipps did not express any view on, and Kipps’s opinion does not address, the fairness of the proposed transaction to, or any consideration received in connection therewith by, the holders of any other class of securities, creditors or other constituencies of AIR, the fairness of the consideration to be paid or payable by AIR to the holders of membership units of Tenax or to be paid or payable by AIR in the tender offer contemplated in the original merger agreement, nor the fairness of the amount or nature of any compensation to be paid or payable to any of the officers, directors or employees of AIR, or any class of such persons, whether relative to the unadjusted redemption price or otherwise. Kipps was not asked to, nor did Kipps express any view on, and Kipps’s opinion does not address, any other term or aspect of the original merger agreement or the redemption rights agreement or the Original Transactions or the Transactions, including, without limitation, the structure or form of the Original Transactions or the Transactions, or any term or aspect of any other agreement or instrument contemplated by the original merger agreement or the redemption rights agreement or entered into or amended in connection with the original merger agreement or the redemption rights agreement. Kipps’s opinion does not address the relative merits of the Original Transactions or the Transactions, including the redemption, as compared to other business or financial strategies that might be available to AIR, nor does it address the underlying business decision of AIR to engage in the Original Transactions or the Transactions, including the redemption. Kipps’s opinion did not constitute a recommendation to the AIR Board or to any other persons in respect of the Original Transactions or the Transactions, including the redemption, including as to how any holder of shares of the AIR common stock should vote or act in respect of the Original Transactions or the Transactions, including the redemption. Kipps did not express any opinion as to the prices at which shares of AIR common stock will trade at any time, as to the potential effects of volatility in the credit, financial and stock markets on AIR or the Original Transactions or the Transactions, including the redemption, or as to the impact of the Original Transactions or the Transactions, including the redemption, on the solvency or viability of AIR or the ability of AIR to pay its obligations when they come due. Kipps is not a legal, regulatory, accounting or tax expert and assumed the accuracy and completeness of assessments by AIR and its advisors with respect to legal, regulatory, accounting and tax matters.

Set forth below is a summary of the material financial analyses reviewed by Kipps with the AIR Board on February 13, 2026, as updated by delivery of the updated presentation to the AIR Board on February 17, 2026. The presentation delivered to the AIR Board on February 13, 2026 in connection with rendering the oral opinion was identical to the February 17, 2026 presentation delivered to the Board on such date, other than the modified redemption price. The following summary, however, does not purport to be a complete description of the analyses performed by Kipps. The order of the analyses described and the results of these analyses do not represent relative importance or weight given to these analyses by Kipps. Except as otherwise noted, the following quantitative information, to the extent that it is based on market data, is based on market data that existed on or before February 12, 2026 (the last trading date prior to the rendering of Kipps’s oral opinion), and is not necessarily indicative of current market conditions.

For purposes of its analyses and reviews, Kipps considered general business, economic, market and financial conditions, industry sector performance and other matters, as they existed and could be evaluated as of the date of its opinion, many of which are beyond the control of AIR. The estimates contained in Kipps’s analyses and reviews, and the ranges of valuations resulting from any particular analysis or review, are not necessarily indicative of actual values or predictive of future results or values, which may be significantly more or less favorable than those suggested by Kipps’s analyses and reviews. In addition, analyses and reviews relating to the value of companies, businesses or securities do not purport to be appraisals or to reflect the prices at which companies, businesses or securities actually may be sold. Accordingly, the estimates used in, and the results derived from, Kipps’s analyses and reviews are inherently subject to substantial uncertainty.

The following summary of Kipps’s financial analyses includes information presented in tabular format. In order to fully understand the analyses, the tables should be read together with the full text of each summary. The tables are not intended to stand alone and alone do not constitute a complete description of Kipps’s financial analyses. Considering the tables below without considering the full narrative description of Kipps’s financial analyses, including the methodologies and assumptions underlying such analyses, could create a misleading or incomplete view of such analyses.

For purposes of its opinion and the financial analyses described below, Kipps calculated the unadjusted redemption price pursuant to and in accordance with a formula set forth in the original merger agreement prior to its amendment and restatement, which defined the redemption price as 107.3% of the “Debt Adjusted AIR Share Price”, where for purposes of such formula:

•        “Debt Adjusted AIR Share Price” meant the “Debt Adjusted AIR Equity Value” divided by the “AIR Share Target Amount”, subject to certain adjustments thereto;

•        “Debt Adjusted AIR Equity Value” meant $20,500,000 minus the “AIR Excess Debt”;

•        “AIR Excess Debt” meant the amount by which the “AIR Net Indebtedness” set forth in AIR’s closing capitalization schedule exceeded the “AIR Debt Target Amount”;

•        “AIR Debt Target Amount” meant $24,600,000; and

•        “AIR Share Target Amount” meant 5,256,325.

Applying the foregoing, the Debt Adjusted AIR Share Price was equal to the quotient of (A) an amount equal to (i) $20,500,000 minus (ii) the amount by which the AIR Net Indebtedness exceeded $24,600,000, divided by (B) 5,256,325.

For purposes of Kipps’s opinion and the financial analyses described below, AIR management instructed Kipps to assume that the AIR Net Indebtedness, as of December 31, 2025, was equal to the AIR Debt Target Amount of $24,600,000. Accordingly, Kipps calculated the unadjusted redemption price of $4.18 as 107.3% of the quotient of $20,500,000 divided by 5,256,325.

Summary of Kipps’s Financial Analyses

Selected Publicly Traded Companies Analysis

Kipps reviewed and compared certain financial information of AIR to corresponding financial multiples and ratios for the following selected publicly traded companies in the aerospace/defense industry (referred to in this section as the “selected companies”):

•        Jabil Inc.

•        Plexus Corp.

•        Albany International Corp.

•        Ducommun Incorporated

•        Magellan Aerospace Corporation

For each of the selected companies, Kipps calculated enterprise value (defined as equity market capitalization plus total debt, plus preferred equity and minority interest, less cash and cash equivalents) as a multiple of (i) estimated 2026 EBITDA (such estimated 2026 earnings referred to as “2026E EBITDA” and such multiples referred to as “EV/2026E EBITDA”), and (ii) projected 2027 EBITDA (such estimated 2027 earnings referred to as “2027P EBITDA” and such multiples referred to as “EV/2027P EBITDA”), based on closing share prices as of February 6, 2026. Estimated and projected financial data of the selected companies were based on publicly available research analysts’ estimates obtained from Capital IQ, company filings and press releases as of February 6, 2026.

Based on the multiples it derived for the selected companies and based on its professional judgment and experience, Kipps applied a (i) EV/2026E EBITDA multiple reference range of 8.5x to 10.5x to AIR’s estimated EBITDA in calendar year 2026 as reflected in the Forecasts, and (ii) EV/2027P EBITDA multiple reference range of 7.5x to 9.5x to AIR’s projected EBITDA in calendar year 2027 as reflected in the Forecasts.

Based on these ranges of implied total enterprise values, AIR’s estimated net debt as of December 31, 2025, and the number of fully diluted shares of AIR, each as provided by AIR’s management, this analysis indicated the following ranges of implied equity values per share of AIR common stock, each as compared to the unadjusted redemption price:

Although none of the selected companies is directly comparable to AIR, Kipps selected these companies because they are publicly traded aerospace and defense firms, many of which possess specialized build-to-print/build-to-spec manufacturing expertise, that Kipps, in its professional judgment and experience, considered generally relevant to AIR for purposes of its financial analyses. In evaluating the selected companies, Kipps made judgments and assumptions with regard to general business, economic and market conditions affecting the selected companies and other matters, as well as differences in the selected companies’ financial, business and operating characteristics. Accordingly, an evaluation of the results of this analysis is not entirely mathematical. Rather, this analysis involves complex considerations and judgments regarding many factors that could affect the relative values of the selected companies and the multiples derived from the selected companies.

Selected Transactions Analysis

Kipps reviewed financial information related to the following selected transactions involving target companies in the aerospace/defense industry, specifically aerospace assembly and component manufacturing, announced between 2018 and 2025 (referred to in this section as the “selected transactions”). The selected transactions reviewed by Kipps, and the month and year each was announced, were as follows:

For each selected transaction, Kipps calculated the implied enterprise value (defined as the target company’s implied equity value based on the consideration paid in the applicable transaction plus total debt plus debt-like liabilities plus minority interest less cash and cash equivalents) as a multiple of last twelve-month EBITDA for the target company at the time of the announcement of the applicable transaction (referred to in this section as “LTM EBITDA” and such multiple, “EV/LTM EBITDA”). Estimated financial data of the selected transactions were based on information dated as of the time of announcement of the relevant transaction.

Based on the multiples it derived from the selected transactions and based on its professional judgment and experience, Kipps selected a reference range of EV/LTM EBITDA multiples of 7.0x to 9.0x and applied this range of multiples to AIR’s estimated LTM EBITDA as of December 2025, based on publicly available business and financial information for AIR. Based on this range of implied total enterprise values, AIR’s estimated net debt and

option exercise amount as of December 31, 2025 of $25.4 million and the number of fully diluted shares of AIR, each as provided by AIR’s management, this analysis indicated a range of implied equity values per share of AIR common stock of $0.82 to $2.54, as compared to the unadjusted redemption price.

Although none of the target companies or businesses reviewed in the selected transactions analysis is directly comparable to AIR and none of the selected transactions is directly comparable to the transaction, Kipps selected these transactions because they involve companies or businesses that Kipps, in its professional judgment and experience, considered generally relevant to AIR for purposes of its financial analyses. In evaluating the selected transactions, Kipps made judgments and assumptions with regard to general business, economic and market conditions and other factors existing at the time of the selected transactions, and other matters, as well as differences in financial, business and operating characteristics and other factors relevant to the target companies or businesses in the selected transactions. Accordingly, an evaluation of the results of this analysis is not entirely mathematical. Rather, this analysis involves complex considerations and judgments regarding many factors that could affect the relative values of the target companies or businesses in the selected transactions and the multiples derived from the selected transactions.

Discounted Cash Flow Analysis

Kipps performed a discounted cash flow analysis of AIR to calculate ranges of implied present values of the per share equity value of AIR utilizing estimates of the standalone unlevered, after-tax free cash flows that AIR was forecasted to generate over the period from January 1, 2026, through December 31, 2030, based on the Forecasts. Kipps calculated terminal values for AIR using two methods: (i) a perpetuity growth method — under which Kipps calculated terminal values for AIR by applying a range of perpetuity growth rates of 2.5% to 3.5%, which range was selected based on Kipps’s professional judgment and experience, to an estimate of the unlevered, after-tax free cash flows that AIR was forecasted to generate in the terminal year based on the Forecasts, and (ii) a terminal multiple method — under which Kipps calculated terminal values for AIR by applying a range of enterprise values to LTM EBITDA multiples of 7.0x to 9.0x, which range was selected based on Kipps’s professional judgment and experience, to an estimate of AIR’s terminal year EBITDA based on the Forecasts.

The cash flows and terminal values in each case were then discounted to present value as of December 31, 2025, using discount rates ranging from 13.0% to 15.0%, representing an estimate of AIR’s weighted average cost of capital, as estimated by Kipps based on its professional judgment and experience, to derive implied enterprise value reference ranges for AIR. Based on these ranges of implied enterprise values, AIR’s estimated net debt as of December 31, 2025, and the number of fully diluted shares of AIR, each as provided by AIR’s management, this analysis indicated ranges of implied equity values per share of AIR common stock as set forth in the table below, as compared to the unadjusted redemption price:

Premiums Paid Analysis

Using publicly available information, Kipps reviewed identified transactions involving acquisitions where a control premium was paid for a publicly traded target with a market capitalization less than or equal to $250 million between January 1, 2020 and December 31, 2025. Using publicly available information, Kipps calculated the premiums paid as the percentage by which the per share consideration paid or proposed to be paid in each such transaction exceeded the closing market price per the target companies one day, one week and one month prior to the announcement of each such transaction.

This analysis indicated the following:

Based on the results of this analysis and its professional judgment and experience, Kipps applied a premium range of 14.5% to 71.4% to the closing price per share of AIR common stock of $3.30 on January 16, 2026. This analysis indicated a range of implied equity values per share of AIR common stock of $3.78 to $5.66, as compared to the unadjusted redemption price.

Miscellaneous

The foregoing summary of Kipps’s financial analyses does not purport to be a complete description of the analyses or data presented by Kipps to the AIR Board. In connection with the review of the Original Transactions by the AIR Board, Kipps performed a variety of financial and comparative analyses for purposes of rendering its opinion. The preparation of a fairness opinion is a complex process and is not necessarily susceptible to partial analysis or summary description. Selecting portions of the analyses or of the summary described above, without considering the analyses as a whole, could create an incomplete view of the processes underlying Kipps’s opinion. In arriving at its fairness determination, Kipps considered the results of all the analyses and did not draw, in isolation, conclusions from or with regard to any one analysis or factor considered by it for purposes of its opinion. Rather, Kipps made its determination as to fairness on the basis of its professional judgment and experience after considering the results of all the analyses. In addition, Kipps may have given various analyses and factors more or less weight than other analyses and factors, and may have deemed various assumptions more or less probable than other assumptions. As a result, the ranges of valuations resulting from any particular analysis or combination of analyses described above should not be taken to be the view of Kipps with respect to the actual value of the shares of AIR common stock. Further, Kipps’s analyses involve complex considerations and judgments concerning financial and operating characteristics and other factors that could affect the acquisition, public trading or other values of the companies used, including judgments and assumptions with regard to industry performance, general business, economic, market and financial conditions and other matters, many of which are beyond the control of AIR or its advisors. Rounding may result in total sums set forth in this section not equaling the total of the figures shown.

Kipps prepared these analyses for the purpose of providing an opinion to the AIR Board as to the fairness to the holders of the AIR common stock, from a financial point of view, of the unadjusted redemption price. These analyses do not purport to be appraisals or to necessarily reflect the prices at which the business or securities actually may be sold. Any estimates contained in these analyses are not necessarily indicative of actual future results, which may be significantly more or less favorable than those suggested by such estimates. Accordingly, estimates used in, and the results derived from, Kipps’s analyses are inherently subject to substantial uncertainty, and Kipps assumes no responsibility if future results are materially different from those forecasted in such estimates.

Kipps’s financial advisory services and its opinion were provided for the information and benefit of the AIR Board (in its capacity as such) in connection with its evaluation of the proposed Original Transactions. The issuance of Kipps’s opinion was approved by an Opinion Committee of Kipps.

Kipps did not recommend any specific amount of consideration to the AIR Board or AIR management or that any specific amount of consideration constituted the only appropriate consideration in the transactions for the holders of the AIR common stock.

Pursuant to the terms of Kipps’s engagement letter with AIR, AIR has agreed to pay Kipps a fee for its services in the aggregate amount of approximately $1.7 million, of which (i) $100,000 was payable upon execution of the engagement letter and is fully creditable against any fee payable upon the consummation of the merger,

(ii) $350,000 was payable upon delivery of Kipps’s opinion in connection with the original merger agreement and is fully creditable against any fee payable upon the consummation of the merger and (iii) the remainder will be payable contingent upon the consummation of the merger. AIR has also agreed to reimburse Kipps for certain of its expenses and to indemnify Kipps against certain liabilities arising out of its engagement.

During the two-year period prior to the date of its opinion, Kipps and its affiliates have not been engaged to provide financial advisory or other services to AIR and it has not received any compensation from AIR during such period. In addition, during the two-year period prior to the date of its opinion, Kipps and its affiliates have not been engaged to provide financial advisory or other services to Tenax and it has not received any compensation from Tenax during such period. Kipps may provide financial advisory or other services to AIR and Tenax in the future, and in connection with any such services Kipps may receive compensation.

Kipps and its affiliates engage in a wide range of activities for its and their own accounts and the accounts of customers, including corporate finance, mergers and acquisitions, equity sales, trading and research, private equity, placement agent, asset management and related activities. In connection with these businesses or otherwise, Kipps and its affiliates and/or its or their respective employees, as well as investment funds in which any of them may have a financial interest, may at any time, directly or indirectly, hold long or short positions and may trade or otherwise effect transactions for their own accounts or the accounts of customers, in debt or equity securities, senior loans and/or derivative products or other financial instruments of or relating to AIR, Tenax, potential parties to the Original Transactions or the Transactions and/or any of their respective affiliates or persons that are competitors, customers or suppliers of AIR or Tenax.

AIR engaged Kipps to act as a financial advisor based on Kipps’s qualifications, experience and reputation. Kipps is an internationally recognized investment banking firm in the aerospace, defense and government services industry and provides fairness opinions in connection with transactions and acquisitions, leveraged buyouts and valuations for corporate and other purposes.

Certain Unaudited Prospective Financial Information Used by Our Board of Directors and Financial Advisor

AIR does not, as a matter of course, publicly disclose detailed long-term financial forecasts or internal projections as to future performance, earnings or other results given, among other reasons, the uncertainty of the underlying assumptions and estimates. However, in connection with the effort to solicit counterparties and provide them with current financial information, AIR management prepared the Forecasts, which were provided to certain counterparties, the AIR Board and Kipps for its use and reliance in connection with its financial analyses and opinion. The Forecasts speak only as of the time they were prepared and provided to the AIR Board.

The Forecasts were not prepared for the purpose of public disclosure, and were not prepared in compliance with published guidelines of the SEC or the guidelines established by the American Institute of Certified Public Accountants for preparation and presentation of financial forecasts or projections. The Forecasts were based on numerous variables and assumptions that are inherently uncertain and may be beyond AIR’s control. Accordingly, the Forecasts may not be realized and actual results may differ materially from those reflected in the Forecasts. The summary of the Forecasts included in this proxy statement/prospectus is not intended to influence your decision whether to vote in favor of any of the proposals at the special meeting. The inclusion of this information in this proxy statement/prospectus should not be regarded as an indication that AIR or any of its affiliates, officers, directors, employees, advisors or other representatives considered, or now considers, the Forecasts to be material or necessarily predictive of actual future results or events, and the Forecasts should not be relied upon as such.

Neither AIR’s independent auditors nor any other independent accountants have compiled, examined or performed any procedures with respect to the Forecasts, nor have they expressed any opinion or any other form of assurance on such information or its achievability, and they assume no responsibility for, and disclaim any association with, the Forecasts.

Forecasts

The following table sets forth the projected revenue, net income and EBITDA reflected in the AIR Forecasts:

____________

(1)      Represents earnings before interest, taxes, depreciation and amortization, excluding (as applicable) and reflecting stock-based compensation as an expense. Reconciling projected EBITDA to net income presents inherent difficulty in forecasting certain amounts required for a full reconciliation, for example, interest expense, taxes, amortization, stock based compensation and non-recurring items.

Tenax’s Reasons for the Merger

In evaluating the merger and the other Transactions, the Tenax Board, with the assistance of Tenax’s management and advisors, weighed a number of factors, both favorable and unfavorable. The factors weighing in favor of the merger included:

•        the opportunity to combine Tenax with an established publicly traded aerospace and defense company, creating a platform with broader capabilities, customer relationships and growth prospects than Tenax has on a stand-alone basis;

•        the complementary nature of the two businesses, AIR’s manufacturing of precision components and assemblies for aerospace and defense contractors, and Tenax’s special mission aircraft and related aviation equipment and services for the governments and other customers, positioning the combined company to participate across a broader portion of the aerospace and defense value chain;

•        the Tenax Board’s expectation of continued growth in demand for special mission aviation supporting national security and public safety missions, which the combined company is better positioned to pursue than Tenax alone;

•        the access to the public capital markets without the time, cost and execution risk associated with a traditional initial public offering, providing the combined company with a publicly traded currency that can be used to support future acquisitions and other growth opportunities;

•        AIR’s long operating history and reputation in the aerospace and defense industry, its established relationships with leading aerospace and defense prime contractors, its funded backlog and unfilled contract value, its skilled workforce and its manufacturing facilities;

•        the fact that the Tenax Members will retain a substantial majority of the economic interest in, and voting power of, the combined company and will continue to participate in any future growth and appreciation in the value of the combined company;

•        the opportunity for the Tenax Members to hold publicly traded securities that may provide greater liquidity over time than their existing interests in a privately held company, subject to applicable securities laws and contractual restrictions; and

•        the anticipated governance structure of the combined company, including the right of the Tenax Members to designate a majority of the members of the board of directors of the combined company at the closing.

The Tenax Board also considered a number of potentially negative factors including:

•        the risks and costs associated with operating as a public company, including increased legal, accounting, compliance, reporting and governance obligations;

•        AIR’s financial condition, the impending expiration and non-renewal of AIR’s senior credit facility, its negative projected cash flows, need for additional capital and the risk of further deterioration;

•        the cash Tenax or the combined company must fund for the Transactions, including to repay AIR’s indebtedness and on any exercise of the Redemption Rights;

•        the risks of combining two different operating models and the possibility that the anticipated benefits may not be realized;

•        the risk that the merger is not completed, including the resulting harm to Tenax’s business and relationships, the termination fee and expense reimbursement payable in certain circumstances;

•        the risk that the market price of AIR common stock following the merger may not reflect the intrinsic value of the combined company and may be subject to significant volatility due to factors affecting the combined company, the aerospace and defense industry or the broader equity markets; and

•        the other risks described in the section entitled “Risk Factors” beginning on page 16 of this proxy statement/prospectus.

Although the foregoing discussion sets forth the principal factors considered by the Tenax Board, it is not intended to be exhaustive and may not include all of the factors considered by the Tenax Board, and each member of the Tenax Board may have considered different factors or given different weight to each factor. The above factors are not presented in any order of priority. In view of the variety of factors, the amount of information and the complexity of the matters considered, the Tenax Board did not find it practicable to, and did not, make specific assessments of, or assign relative weights to, the specific factors considered. The explanation of the reasoning of the Tenax Board and certain information presented in this section are forward-looking in nature and should be read in light of the factors discussed in the section entitled “Cautionary Statement Regarding Forward-Looking Statements” beginning on page 32 of this proxy statement/prospectus.

Interests of Tenax’s Managers and Executive Officers in the Merger

Certain members of the Tenax Board and certain of Tenax’s executive officers have interests in the merger that are different from, or in addition to, the interests of Tenax Members generally. These interests may present them with actual or potential conflicts of interest, and these interests, to the extent material, are described below.

Ownership Interests

As of August 31, 2026, Tenax’s then-current non-employee managers and executive officers beneficially owned (indirectly through membership interests in NEH and Managers Equity, LLC), in the aggregate, approximately 78% of the Tenax units. Such Tenax units will be converted into shares of AIR common stock at the effective time.

Management Following the Merger

Two members of the Tenax Board and three of Tenax’s executive officers are expected to become directors and executive officers, respectively, of the combined company upon the closing of the merger, in connection with which they may enter into new employment agreements to reflect their status as executive officers of a publicly-traded company. For more information, see the sections entitled “Management and Directors of the Combined Company” beginning on page 154 of this proxy statement/prospectus and “Executive Officer and Director Compensation of the Combined Company” beginning on page 159 of this proxy statement/prospectus.

Certain Relationships and Related Party Transactions

Thomas Foley, Chairman of Tenax, and Taran Bakker, a member of the Tenax Board, are parties to certain agreements with Tenax and will be parties to certain agreements with the combined company following the merger. For more information, see the section entitled “Certain Relationships and Related Party Transactions of the Combined Company” beginning on page 161 of this proxy statement/prospectus.

Governance of AIR Following the Merger

Board of Directors

Following the consummation of the merger, the AIR Board will be composed of no fewer than eight directors, which shall consist only of (a) no fewer than six individuals designated by Tenax, namely Thomas Foley, Taran Bakker, Timothy Cantrell, Michael Ewald, Donald Fawcett, Bryan Fenton, DeWolfe Miller and John Young, and (b) two individuals to be mutually agreed upon by Tenax and AIR, namely [•] and [•], to hold office in accordance with the articles of incorporation and bylaws of AIR.

Timothy Cantrell, Michael Ewald, Donald Fawcett, Bryan Fenton, DeWolfe Miller, John Young, [•] and [•] are expected to be “independent directors” within the meaning of Item 407(a)(1) and NYSE American Rule 803A(2).

Following the consummation of the merger, the Audit Committee will be composed of members who meet the independence requirements set forth by the SEC, in the NYSE American listing requirements and the Audit Committee charter. Each member of the Audit Committee will be financially literate in accordance with the NYSE American listing requirements.

For more information, see the section entitled “Management and Directors of the Combined Company” beginning on page 154 of this proxy statement/prospectus.

Management

AIR’s executive team following the merger will draw on the leadership teams of AIR and Tenax. In particular, Jim Linder, Ignacio Ladegui and Alan Oswalt, current executive officers of Tenax, will become Chief Executive Officer, Chief Financial Officer and EVP of Operations, respectively, of the combined company.

Tenax and its members, through the date on which the merger agreement was signed by all parties, made no arrangements with, and made no offers to, any members of AIR’s management team regarding continued employment with AIR.

For more information, see the section entitled “Management and Directors of the Combined Company” beginning on page 154 of this proxy statement/prospectus.

Controlled Company

Following the consummation of the merger, AIR will be a “controlled company” for purposes of Section 801(a) of the NYSE American Company Guide and, if and for so long as it so qualifies, intends to rely on exemptions from certain governance standards.

Under Section 801(a), a company in which over 50% of the voting power is held by an individual, a group or another company is a “controlled company” and is exempt from certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions from the requirements that (1) director nominees be selected or recommended for selection by a majority of the independent directors or by a nominating committee composed solely of independent directors and (2) compensation of the chief executive officer be determined or recommended to the board of directors by a majority of its independent directors or by a compensation committee composed of independent directors. AIR does not intend to rely on the exemption from the requirement that a majority of AIR’s board of directors consist of independent directors.

Smaller Reporting Company

Following the consummation of the merger, AIR is expected to qualify as a “Smaller Reporting Company” for purposes of Section 801(h) of the NYSE American Company Guide and, if and for so long as it so qualifies, intends to rely on exemptions from certain governance standards.

Under Section 801(h), a company that satisfies the definition of smaller reporting company in Rule 12b-2 of the Exchange Act, meaning it is an issuer that is not an investment company, an asset-backed issuer or a majority-owned subsidiary of a parent that is not a smaller reporting company and that (1) has a public float of less than $250 million or (2) has annual revenues of less than $100 million and either (i) no public float or (ii) a public float of less than $700 million, is a “Smaller Reporting Company”. Smaller Reporting Companies are exempt from

certain corporate governance requirements. Immediately following the consummation of the merger, the combined company intends to rely on exemptions allowing (1) an audit committee of at least two independent members (rather than three independent members), (2) a compensation committee that is not composed of independent directors and (3) selection of a compensation consultant, legal counsel or other adviser to the compensation committee without consideration of such adviser’s independence. AIR does not intend to rely on the exemption allowing a board of directors composed of at least 50% independent directors (rather than a majority of independent directors).

Closing and Effective Time of the Merger

The closing of the merger will take place on the third business day following the satisfaction or written waiver, where permissible, of the conditions to the closing of the merger (other than those conditions that by their nature are to be satisfied at the closing, but subject to the satisfaction or written waiver, where permissible, of such conditions), or at such other time and date as shall be agreed in writing between AIR and Tenax. Subject to the satisfaction or waiver of the conditions to the closing described in the section entitled “The Merger Agreement — Conditions to Completion of the Merger” beginning on page 82 of this proxy statement/prospectus, it is currently anticipated that the merger will close in the fourth quarter of 2026. It is possible that factors outside the control of both parties could result in the merger being completed at a different time, or not at all.

As soon as practicable on the closing date, Tenax will cause the certificate of merger to be filed with the Secretary of State of the State of Delaware in such form as is required by, and executed in accordance with, the relevant provisions of the DLLCA. The merger will become effective upon the filing of the certificate of merger with the Secretary of State of the State of Delaware, or such later date and time as is specified in the certificate of merger and agreed to by AIR and Tenax in writing.

Regulatory Approvals

Completion of the merger is conditioned on, among other things, the expiration or termination of the applicable waiting periods under the HSR Act, the receipt of any required approvals or the expiration or termination of any applicable waiting periods under Antitrust Laws of certain other specified jurisdictions, if applicable, and the absence of any law or order enacted, issued, promulgated, enforced or entered, whether temporary, preliminary or permanent, which is then in effect and has the effect of enjoining, restraining, prohibiting or otherwise preventing consummation of the Transactions.

Under the HSR Act and the rules promulgated thereunder, the merger may not be completed until notification and report forms have been filed with the FTC and the DOJ and the applicable waiting period, or any extensions thereof, has expired or been terminated. The initial HSR Act waiting period is up to 30 days following the filing of the notification and report forms, unless earlier terminated by the FTC and the DOJ.

Pursuant to the merger agreement, each party has agreed to use its reasonable best efforts to obtain all necessary actions or nonactions, consents, approvals and waivers from, and to give any necessary notices to, governmental authorities and to make all necessary registrations, declarations and filings (including filings that are required or advisable under the HSR Act and other registrations, declarations and filings with, or notices to, governmental authorities, that may be required or advisable under other applicable antitrust, competition or pre-merger notification laws of any jurisdiction), if any. Pursuant to the merger agreement, Tenax and its affiliates are not required to agree to any prohibition or limitation on their ownership or operation of their businesses, any divestiture, hold-separate arrangement or any other restriction on their ability to operate their businesses, nor are they obligated to litigate before the FTC or DOJ, in order to obtain regulatory clearance.

On May 15, 2026, Thomas Foley filed a notification and report form pursuant to the HSR Act with the FTC and the DOJ with respect to his proposed acquisition of AIR common stock in connection with the merger. The applicable waiting period expired on June 15, 2026.

At any time before or after consummation of the merger, notwithstanding the expiration or termination of the waiting period under the HSR Act, the DOJ, the FTC or any U.S. state could take such action under the Antitrust Laws as it deems necessary or desirable in the public interest, including seeking to enjoin the completion of the merger or seeking divestiture of substantial assets of AIR or Tenax. Private parties may also seek to take legal action under the Antitrust Laws under certain circumstances.

There can be no assurance that a challenge to the Transactions on antitrust grounds will not be made or, if such a challenge is made, what the result will be. The required regulatory and other approvals are discussed under the section entitled “The Merger Agreement — Covenants and Agreements — Reasonable Best Efforts; Further Action” beginning on page 80 of this proxy statement/prospectus.

Accounting Treatment

The merger will be accounted for as a reverse merger using the acquisition method of accounting in accordance with Topic 805. For accounting purposes, Tenax will be treated as the accounting acquirer and AIR will be treated as the accounting acquiree. As a result, Tenax’s historical consolidated financial statements will become those of the combined company, and AIR’s identifiable assets and liabilities will be recognized at their estimated fair values as of the closing date in accordance with the acquisition method of accounting.

Dividend Policy Following the Merger

AIR has not declared or paid any cash dividends on its common stock in recent years and does not currently anticipate paying cash dividends in the foreseeable future, other than the dividend of Redemption Rights to be declared in connection with the Transactions. Any future dividends will be at the discretion of the AIR Board and will depend on AIR’s financial condition, results of operations, capital requirements and other factors the AIR Board deems relevant, and will be subject to applicable law.

Listing of the Combined Company Common Stock on NYSE American

AIR’s common stock is currently listed on NYSE American under the symbol “AIRI” and is expected to continue to be listed on NYSE American following the consummation of the merger.

THE MERGER AGREEMENT

The following section summarizes certain material provisions of the merger agreement and the amendment to the merger agreement, which are included in this proxy statement/prospectus as Annex A and Annex A-1, respectively, and incorporated by reference herein. The summary of the merger agreement below and elsewhere in this proxy statement/prospectus is qualified in its entirety by reference to the merger agreement. This summary does not purport to be complete and may not contain all of the information about the merger agreement that is important to you. This section is not intended to provide you with any factual information about Tenax or AIR. The rights and obligations of Tenax and AIR are governed by the merger agreement and not by this summary or any other information contained in or incorporated by reference into this proxy statement/prospectus. AIR stockholders are urged to read the merger agreement carefully and in its entirety, as well as this proxy statement/prospectus and the information incorporated by reference into this proxy statement/prospectus.

Explanatory Note Regarding the Merger Agreement

The merger agreement and the amendment to the merger agreement dated July 31, 2026 are attached to this proxy statement/prospectus as Annex A and Annex A-1, respectively, and described in this summary to provide you with information regarding its terms. The merger agreement contains representations and warranties by AIR and Merger Sub, on the one hand, and by Tenax, on the other hand, which were made solely for the benefit of the other parties for purposes of the merger agreement. The representations, warranties and covenants made in the merger agreement by Tenax, AIR and Merger Sub were qualified and subject to important limitations agreed to by Tenax, AIR and Merger Sub in connection with negotiating the terms of the merger agreement. In particular, in your review of the representations and warranties contained in the merger agreement and described in this summary, it is important to bear in mind that the representations and warranties were negotiated with the principal purpose of allocating risk between the parties to the merger agreement, rather than establishing matters as facts about AIR or Tenax or any other person at the time they were made or otherwise. The representations and warranties may also be subject to a contractual standard of materiality different from that generally applicable to stockholders and reports and documents filed with the SEC, and some were qualified by the matters contained in the confidential disclosure letters that each of AIR and Tenax delivered in connection with the merger agreement as well as certain documents filed with the SEC. Moreover, information concerning the subject matter of the representations and warranties, which do not purport to be accurate as of the date of this proxy statement/prospectus, may have changed since February 16, 2026. Accordingly, the representations and warranties and other provisions of the merger agreement should not be read alone, but instead should be read together with the information provided elsewhere in this proxy statement/prospectus and in the documents incorporated by reference into this proxy statement/prospectus. See “Where You Can Find More Information” beginning on page 186 of this proxy statement/prospectus.

General

The merger agreement provides, among other matters, for the acquisition of Tenax pursuant to a merger, on the terms and subject to the conditions in the merger agreement and in accordance with the DLLCA. Pursuant to the merger agreement, at the effective time, Merger Sub will be merged with and into Tenax, with Tenax continuing as the surviving company and as a wholly owned subsidiary of AIR.

At the effective time, Tenax’s certificate of formation as of immediately prior to the effective time will continue to be the certificate of formation of the surviving company, and the limited liability company agreement in the form set forth in Exhibit D to the merger agreement shall be the limited liability company agreement of the surviving company. In addition, at the closing, AIR will amend its bylaws to remove the provision prohibiting stockholder action by written consent.

The parties will take all requisite action (including to the extent necessary increasing the size of the AIR Board) so that, from and after the effective time, the AIR Board will include no fewer than eight directors, which will consist only of (a) no fewer than six individuals designated by Tenax and (b) two individuals to be mutually agreed upon by Tenax and AIR, each to hold office in accordance with the articles of incorporation and bylaws of AIR. The officers of Tenax immediately prior to the effective time will be the officers of the surviving company, each until their respective successors are duly elected and qualified or until such officer’s earlier death, resignation or removal.

Closing; Effective Time

The closing will take place on the third business day after the satisfaction or written waiver (where permissible) of the conditions to closing (other than those conditions that by their terms are to be satisfied at the closing, but subject to the satisfaction or written waiver (where permissible) of those conditions at the closing), unless another date is agreed to in writing by Tenax and AIR.

Promptly following the receipt of the requisite AIR stockholder approvals at the special meeting, AIR will cause the amendment to AIR’s articles of incorporation to be filed with the Nevada Secretary of State in such form as required by, and executed in accordance with, the relevant provisions of the NRS and, promptly following the effectiveness of that amendment but prior to the closing, AIR will cause a certificate of change effecting the reverse stock split to be filed with the Nevada Secretary of State in accordance with NRS 78.207. As soon as practicable on the closing date, Tenax will cause a certificate of merger to be filed with the Secretary of State of the State of Delaware as provided by the DLLCA, and each of AIR, Merger Sub and Tenax will make all other filings or recordings required under the NRS or the DLLCA in connection with the merger (if any). The merger will become effective at such time as the certificate of merger is filed with the Secretary of State of the State of Delaware or at such later date and time as is specified in the certificate of merger and agreed to by AIR and Tenax in writing.

Conversion of Securities

Subject to the terms and conditions set forth in the merger agreement, at the effective time, each Tenax unit will be converted into the right to receive the portion of the merger consideration allocated in respect thereof, calculated in accordance with the capitalization schedule, which Tenax is required to deliver no less than two business days prior to the closing, and each holder of a Tenax unit immediately prior to the effective time will thereafter cease to have any rights with respect to such Tenax unit, except the right to receive the merger consideration in respect thereof. After the effective time, there will be no further registration of transfers of Tenax units.

Also at the effective time, all membership interests of Merger Sub issued and outstanding immediately prior to the effective time will be converted into 100% of the membership interests of the surviving company.

Merger Consideration

The merger consideration is defined as 126,900,000 shares of AIR common stock, to be issued to the Tenax Members and, as applicable, reserved for issuance to the Tenax Warrantholders upon the exercise of their warrants as described in the section entitled “The Merger Agreement — Exchange Procedures” beginning on page 68 of this proxy statement/prospectus, subject to equitable adjustment to reflect appropriately the effect of any subdivision, stock dividend, stock split (including the reverse stock split), combination, recapitalization, exchange of shares, reclassification or other like change with respect to AIR common stock occurring on or after February 16, 2026 and prior to the closing. After giving effect to the proposed amendment to the articles of incorporation of AIR contemplated by the authorized shares proposal and the subsequent reverse stock split, the merger consideration would consist of 25,380,000 shares of AIR common stock.

Exchange Procedures

At or prior to the effective time, AIR will deposit, or cause to be deposited, with Broadridge Corporate Issuer Solutions (the “Transfer Agent”), in trust for the benefit of the Tenax Members, a number of shares of AIR common stock, in book-entry or certificated form, equal to the portion of the merger consideration issuable to the Tenax Members in accordance with the capitalization schedule that Tenax is required to deliver prior to closing for the purpose of exchanging Tenax units for the merger consideration.

Prior to the effective time, Tenax will provide to each person who is or will be, as of immediately prior to the effective time, a Tenax Member a letter of transmittal, which will contain representations and warranties customary for a private placement of securities exempt from registration under the Securities Act and such other provisions as Tenax may reasonably specify (including a provision confirming that delivery shall be effected, and risk of loss and title shall pass, only upon proper delivery of such letter of transmittal). Upon delivery to the Transfer Agent of such letter of transmittal, duly executed, and such other documents as may reasonably be required by the Transfer Agent or Tenax, each Tenax Member will be entitled to receive (following the effective time), in exchange for such Tenax

Member’s Tenax units, the portion of the merger consideration allocated to such Tenax Member in accordance with the capitalization schedule that Tenax is required to deliver prior to closing (together with cash in lieu of fractional shares), and such Tenax Member’s Tenax units will be canceled. After the effective time, any Tenax units will be deemed to represent only the right to receive the merger consideration upon such exchange.

No interest will be paid or accrue on any cash payable upon exchange of any Tenax units.

No Fractional Shares

AIR will not issue fractional shares of AIR common stock in the merger. Fractional shares of AIR common stock that would otherwise be allocable to any Tenax Members in the merger will be aggregated, and calculations will be rounded up to three decimal places. The Transfer Agent will cause the whole shares obtained thereby to be sold, in the open market or otherwise as reasonably directed by AIR, and in no case later than 20 business days after the effective time, and will make available the net proceeds thereof, on a pro rata basis, without interest and subject to the amount of any withholding taxes as contemplated in the merger agreement, as soon as practicable to the Tenax Members entitled to receive such cash.

Repayment of Payoff Debt

At the closing, Tenax or one of its affiliates will repay, or cause to be repaid, on behalf of AIR and its subsidiaries, the outstanding balance of certain indebtedness of AIR in accordance with the payoff letters furnished to Tenax. See the section entitled “The Merger Agreement — Covenants and Agreements — Payoff Letters” beginning on page 81 of this proxy statement/prospectus.

AIR Equity Awards

Each AIR Equity Award that is outstanding as of immediately prior to the effective time will continue on the same terms and conditions as were applicable to such AIR Equity Awards as of immediately prior to the effective time.

Representations and Warranties

The merger agreement contains representations and warranties by AIR, Merger Sub and Tenax that are subject to certain exceptions and qualifications (including exceptions and qualifications related to knowledge, materiality and material adverse effect).

The merger agreement contains representations and warranties by AIR and Merger Sub relating to, among other things, the following:

•        due organization, valid existence, good standing and qualification to do business;

•        capitalization;

•        corporate power and authority;

•        governmental consents and absence of certain conflicts;

•        compliance with laws and permits;

•        financial statements;

•        internal controls and procedures;

•        absence of undisclosed liabilities;

•        absence of certain changes or events;

•        accuracy of information supplied for inclusion in this proxy statement/prospectus;

•        the operations of Merger Sub;

•        absence of certain legal proceedings and governmental orders;

•        employee benefit plans and labor and employment matters;

•        real property matters;

•        intellectual property, privacy and data protection and artificial intelligence matters;

•        tax matters;

•        environmental matters;

•        material contracts;

•        insurance coverage;

•        finders’ or brokers’ fees;

•        government contracts;

•        absence of payments prohibited under money laundering laws;

•        inapplicability of anti-takeover laws; and

•        financial advisor opinion.

The merger agreement contains representations and warranties by Tenax relating to, among other things, the following:

•        due organization, valid existence, good standing and qualification to do business;

•        capitalization;

•        corporate power and authority;

•        governmental consents and absence of certain conflicts;

•        compliance with laws and permits;

•        financial statements;

•        internal controls and procedures;

•        absence of certain changes or events;

•        accuracy of information supplied for inclusion in this proxy statement/prospectus;

•        sufficiency of funds;

•        absence of certain legal proceedings and governmental orders;

•        employee benefit plans and labor and employment matters;

•        real property matters;

•        intellectual property, privacy and data protection and artificial intelligence matters;

•        tax matters;

•        environmental matters;

•        material contracts;

•        insurance coverage;

•        finders’ or brokers’ fees;

•        government contracts; and

•        absence of payments prohibited under money laundering laws.

Many of the representations and warranties in the merger agreement are qualified by a “materiality” or “material adverse effect” standard (that is, they will not be deemed to be untrue or incorrect unless their failure to be true or correct would be material to, or have a material adverse effect on, the applicable party).

For purposes of the merger agreement, an “AIR Material Adverse Effect” or “Tenax Material Adverse Effect” means, with respect to AIR and its subsidiaries or Tenax and its subsidiaries, respectively, any event, occurrence, state of facts, development, circumstance, change or effect that, individually or in the aggregate with all other events, occurrences, state of facts, developments, circumstances, changes and effects, (a) has had or would reasonably be expected to have a material adverse effect on the business, financial condition or results of operations of such party and its subsidiaries taken as a whole; or (b) would reasonably be expected to prevent or materially impede, materially interfere with, materially hinder or materially delay the consummation of the Transactions by such party or otherwise prevent such party from performing its obligations under the merger agreement. In addition, the definition of an “AIR Material Adverse Effect” also includes certain liquidity-related events affecting AIR, including, but not limited to, the commencement of insolvency or bankruptcy proceedings against AIR or any of its subsidiaries, or the acceleration of AIR’s material indebtedness prior to its stated maturity. However, with respect to clause (a), any event, occurrence, state of facts, development, circumstance, change or effect to the extent resulting from the following shall not be taken into account in determining whether an AIR Material Adverse Effect or Tenax Material Adverse Effect has occurred:

•        any change in the market price, trading volume or credit ratings of AIR common stock or Tenax equity interests, as applicable, or any failure, in and of itself, to meet internal or public revenue or earnings projections, forecasts, guidance, estimates, milestones or budgets for any period ending (or for which revenues or earnings are released) on or after February 16, 2026 (though the facts or causes underlying or contributing to such change or failure shall be considered in determining whether an AIR Material Adverse Effect or Tenax Material Adverse Effect has occurred);

•        changes in general economic, legal, regulatory or political conditions, or in the financial, credit or capital markets in general;

•        changes in applicable law or GAAP, or in any interpretation thereof;

•        changes in the markets or industries in which such party and its subsidiaries operate (including legal and regulatory changes);

•        acts of civil unrest or war (whether or not declared), armed hostilities or terrorism or any escalation or worsening of any acts of civil unrest or war (whether or not declared), armed hostilities or terrorism under way as of February 16, 2026;

•        earthquakes, hurricanes, tsunamis, tornadoes, floods, mudslides, volcanic eruptions or other natural disasters or any epidemic or pandemic;

•        any changes resulting or arising from the identity of the other party or any of the other party’s affiliates; or

•        the public announcement, pendency or performance of the merger agreement;

provided that, in the case of the second, third, fourth, fifth and sixth bullet points above, such party and its subsidiaries, taken as a whole, are not affected disproportionately relative to other participants in the industries in which they operate.

The representations and warranties in the merger agreement will not survive the effective time.

Other Covenants and Agreements

Conduct of Business of AIR Prior to Completion of the Merger

AIR has agreed that, between February 16, 2026 and the effective time, except as set forth in the confidential disclosure letter delivered by AIR to Tenax in connection with the original merger agreement, as expressly contemplated by the merger agreement or with the prior written consent of Tenax (which consent shall not be unreasonably withheld, delayed or conditioned), AIR will, and will cause each of its subsidiaries to, use reasonable

best efforts to conduct its business in all material respects in the ordinary course consistent with past practice and in material compliance with applicable law and all AIR’s material contracts and, without limiting the generality of the foregoing, use reasonable best efforts to preserve intact its present business organization and maintain the goodwill and existing relationships with its suppliers, licensors, licensees and others having significant business relationships with them.

Additionally, between February 16, 2026 and the effective time, except as set forth in the confidential disclosure letter delivered by AIR to Tenax in connection with the original merger agreement, as expressly contemplated by the merger agreement or with the prior written consent of Tenax (which consent shall not be unreasonably withheld, delayed or conditioned), AIR has agreed that it will not, and will cause each AIR subsidiary not to:

•        amend or otherwise change AIR’s articles of incorporation or bylaws or equivalent organizational documents, or the equivalent organizational documents of any of its subsidiaries, or create any new subsidiaries;

•        merge or consolidate AIR with any other person or restructure, reorganize or completely or partially liquidate;

•        issue, deliver, sell, grant, pledge, dispose of or grant an encumbrance on, or permit an encumbrance to exist on, any shares of any class of capital stock of AIR or any of its subsidiaries, any other voting securities or other ownership interests, or any options, warrants, convertible securities or other rights of any kind to acquire any shares of such capital stock, voting securities or equity interests, or any “phantom” stock, “phantom” stock rights, stock appreciation rights, stock-based units or other similar interests of AIR or any of its subsidiaries (except for the issuance of shares of AIR common stock issuable pursuant to the exercise of AIR stock options or the settlement of AIR RSUs, in each case, outstanding on February 16, 2026 in accordance with their terms and the terms of the AIR Stock Plans as in effect on February 16, 2026);

•        repurchase, redeem or otherwise acquire any outstanding AIR common stock;

•        (i) sell, lease, license, pledge or dispose of or (ii) grant an encumbrance on, or permit an encumbrance to exist on, any properties or assets (other than intellectual property) or any interests therein of AIR or any of its subsidiaries, other than as permitted by the merger agreement;

•        sell, lease, sublease, license, sublicense, assign or otherwise grant rights under any AIR owned intellectual property (except for non-exclusive licenses granted to customers and suppliers of AIR in the ordinary course of business consistent with past practice) or transfer, cancel, abandon or fail to renew, maintain or diligently pursue applications for or otherwise dispose of any AIR owned intellectual property;

•        declare, set aside, make or pay any dividend or other distribution, payable in cash, stock, property or otherwise, with respect to any of its capital stock, except for dividends by any of AIR’s direct or indirect wholly owned subsidiaries to AIR or any of its other wholly owned subsidiaries;

•        adjust, reclassify, combine, split, subdivide or redeem, or purchase or otherwise acquire, directly or indirectly, any of its capital stock, voting securities or other ownership interests or any securities convertible into or exchangeable or exercisable for capital stock, voting securities or other ownership interests;

•        acquire any assets outside the ordinary course of business consistent with past practice from any other person for consideration in excess of $100,000 in any individual transaction or series of related transactions or $250,000 in the aggregate;

•        make any loans, advances, guarantees or capital contributions to or investments in any person, other than advances to employees of AIR or any of its subsidiaries in respect of travel or other related business expenses, in each case, in the ordinary course of business consistent with past practice;

•        make any payments or distributions to any stockholders, employees, directors, officers or affiliates of AIR or its subsidiaries, or any of their respective affiliates (or any directors, managers or employees of such affiliates), other than payments to employees of salary and expense reimbursement in the ordinary course of business;

•        incur any indebtedness or guarantee such indebtedness of another person, or issue or sell any debt securities or warrants or other rights to acquire any debt security of AIR;

•        make or authorize any capital expenditure in excess of $500,000 in the aggregate during any 12-month period beginning on or after February 16, 2026;

•        modify in any material respect any accounting policies or procedures, other than as required by GAAP or law;

•        except as required by applicable law, (i) make any material change (or file any such change) in any method of tax accounting; (ii) make, change or rescind any material tax election; (iii) settle or compromise any material tax liability or consent to any claim or assessment or enter into any closing agreement relating to a material amount of taxes; (iv) file any material amended tax return; (v) file any claim for refund of a material amount of taxes; or (vi) waive or extend the statute of limitations in respect of material taxes;

•        except as required by the terms of AIR’s employee benefit plans or AIR’s collective bargaining agreements: (i) adopt, enter into, terminate, modify or amend any of AIR’s collective bargaining agreements or AIR’s employee benefit plans; (ii) increase in any manner the compensation, bonus or fringe or other benefits of, or grant or pay any discretionary bonus of any kind or amount whatsoever; (iii) grant, pay or increase any change-in-control, retention, severance or termination pay; (iv) grant or modify any awards (including grants of any stock or stock-based awards or the removal of existing restrictions in any of AIR’s employee benefit plans or awards made thereunder); (v) take any action to fund or secure the payment of compensation or benefits under any of AIR’s employee benefit plans; (vi) take any action to accelerate the vesting or payment of compensation or benefits under any of AIR’s employee benefit plans or awards made thereunder; (vii) materially change any actuarial or other assumption used to calculate funding obligations with respect to any of AIR’s employee benefit plans or change the manner in which contributions to any of AIR’s employee benefit plans are made or the basis on which such contributions are determined (except as may be required for continued compliance with generally accepted accounting principles); or (viii) terminate or hire any service provider, other than terminations for cause (provided that AIR may hire service providers to replace departed service providers in the ordinary course of business consistent with past practice and may terminate or hire service providers with an annual base salary less than $150,000 in the ordinary course of business consistent with past practice);

•        except as required by law or any judgment by a court of competent jurisdiction, (i) pay, discharge, settle or satisfy any material claims, liabilities, obligations or litigation (absolute, accrued, asserted or unasserted, contingent or otherwise), other than in the ordinary course of business consistent with past practice, of liabilities disclosed, reflected or reserved against in the AIR financial statements or incurred since the date of such AIR financial statements in the ordinary course of business consistent with past practice; (ii) cancel or compromise any material indebtedness; or (iii) waive or assign any claims or rights of material value;

•        enter into, terminate, cancel, modify, amend or fail to renew any material contract or real property lease, or any contract or real property lease that, if existing on February 16, 2026, would have been a material contract or real property lease, or waive, release or assign any material rights or claims thereunder, in each case, other than in the ordinary course of business consistent with past practice;

•        enter into, modify, amend or terminate any contract, or waive, release or assign any material rights or claims thereunder, which would reasonably be expected to (i) impair in any material respect the ability of AIR to perform its obligations under the merger agreement or (ii) prevent or materially impede, interfere with, hinder or delay the consummation of the Transactions;

•        enter into any contract that is material to AIR and its subsidiaries, taken as a whole, to the extent consummation of the Transactions would reasonably be expected to trigger, conflict with or result in a violation of any “change of control” or similar provision of such contract;

•        amend any material permit in any material respect, or allow any material permit to lapse, expire or terminate, other than (i) amendments, renewals or extensions of permits in the ordinary course of business consistent with past practice or (ii) non-renewal or non-extension of permits that are not necessary to conduct AIR’s business as then conducted;

•        authorize, apply for or cause to be approved the listing of shares of AIR common stock on any stock exchange; or

•        authorize, commit or agree to do any of the foregoing.

Conduct of Business of Tenax Prior to Completion of the Merger

Tenax has agreed that, between February 16, 2026 and the effective time, except as set forth in the confidential disclosure letter delivered by Tenax to AIR in connection with the merger agreement, as expressly contemplated by the merger agreement or with the prior written consent of AIR (which consent shall not be unreasonably withheld, delayed or conditioned), Tenax will, and will cause each of its subsidiaries to, use reasonable best efforts to conduct its business in all material respects in the ordinary course consistent with past practice and in material compliance with applicable law and all Tenax’s material contracts and, without limiting the generality of the foregoing, use reasonable best efforts to preserve intact its present business organization and maintain the goodwill and existing relationships with its suppliers, licensors, licensees and others having significant business relationships with them.

Additionally, between February 16, 2026 and the effective time, except as set forth in the confidential disclosure letter delivered by Tenax to AIR in connection with the merger agreement, as expressly contemplated by the merger agreement or with the prior written consent of AIR (which consent shall not be unreasonably withheld, delayed or conditioned), Tenax has agreed that it will not, and will cause each Tenax subsidiary not to:

•        amend or otherwise change Tenax’s certificate of formation, limited liability company agreement or equivalent organizational documents, except for any amendments or changes that would not (i) materially delay, materially impede or prevent the consummation of the Transactions or (ii) adversely affect the AIR stockholders in any material respect differently than the Tenax Members;

•        adopt a plan or agreement of complete or partial liquidation or dissolution, merger, amalgamation, consolidation, restructuring, recapitalization or other reorganization of or involving Tenax or any of its subsidiaries (other than dormant subsidiaries or, with respect to any merger, amalgamation or consolidation, other than among Tenax and any wholly owned subsidiary of Tenax or among wholly owned subsidiaries of Tenax);

•        enter into any new line of business that is material to Tenax and its subsidiaries, taken as a whole; or

•        authorize, commit or agree to do any of the foregoing.

No Interfering Transactions

From February 16, 2026 through the earlier of the closing and the termination of the merger agreement, neither Tenax nor AIR will, nor will permit its subsidiaries to, enter into any agreement to acquire another business or effect any transaction that is reasonably likely to prevent or impede, interfere with, hinder or delay in any material respect the consummation of the Transactions.

Stockholder Meeting

The merger agreement provides that AIR will call, give notice of, convene and hold the special meeting as promptly as reasonably practicable following the date upon which the registration statement of which this proxy statement/prospectus forms a part has been declared effective under the Securities Act, with the record date and meeting date to be set by the AIR Board after consultation with Tenax. AIR will, as promptly as reasonably practicable following the date of the merger agreement, set a record date for determining the AIR stockholders

entitled to notice of, and to vote at, the special meeting, which record date will be at least 20 business days following the initiation of a broker search conducted pursuant to Rule 14a-13 under the Exchange Act. AIR may not change the date of, postpone or adjourn the special meeting without Tenax’s consent (not to be unreasonably withheld, conditioned or delayed), except that AIR may postpone or adjourn the special meeting no more than two times under specified circumstances, and in no event to a date more than 30 days after the date for which the special meeting was originally scheduled, without Tenax’s prior written consent. The merger agreement further provides that the AIR Board will recommend that the AIR stockholders vote in favor of the approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal and will use its reasonable best efforts to solicit proxies from the AIR stockholders constituting the requisite AIR stockholder approvals.

AIR will not change the date of, postpone or adjourn the meeting without the consent of Tenax (which may not be unreasonably withheld, conditioned or delayed), except, and no more than two times, (i) for adjournments or postponements to ensure that any required supplement or amendment to this proxy statement/prospectus is provided to the AIR stockholders within a reasonable amount of time in advance of the meeting; (ii) to allow reasonable additional time to solicit proxies in favor of approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal; (iii) if there are insufficient shares of AIR common stock represented at the meeting (either in person or by proxy) to constitute the necessary quorum or if AIR has not received proxies sufficient to allow the receipt of the requisite AIR stockholder approvals at the meeting; or (iv) as required by law. Tenax may cause AIR to postpone or adjourn the meeting once if AIR has not received proxies sufficient to allow the receipt of the requisite AIR stockholder approvals at the meeting and Tenax informs AIR that Tenax believes in good faith that additional time is required to solicit proxies in favor of approval of the stock issuance proposal, the authorized shares proposal and the written consent proposal.

No Solicitation by AIR

AIR has agreed that none of it or any of its subsidiaries or any of their respective representatives will, and that it will cause each of its subsidiaries and each of its and its subsidiaries’ representatives not to, directly or indirectly, (i) solicit, initiate, seek or take any other action to facilitate or encourage the making, submission or announcement of any proposal that constitutes, or could reasonably be expected to lead to, any Competing AIR Proposal; (ii) enter into, maintain, continue or participate in any discussions or negotiations with any person or entity in furtherance of, or furnish to any person any information or otherwise cooperate in any way with respect to, any Competing AIR Proposal; (iii) agree to, approve, endorse, recommend or consummate any Competing AIR Proposal; (iv) enter into, or propose to enter into, any contract or agreement which could reasonably be expected to lead to any Competing AIR Proposal; or (v) resolve, propose or agree, or authorize or permit any representative, to do any of the foregoing.

In addition, AIR has agreed to, and to cause its subsidiaries and its and its subsidiaries’ representatives to, immediately cease and cause to be terminated all existing discussions or negotiations with any persons conducted prior to the execution of the merger agreement by AIR, any of its subsidiaries or its or any of their respective representatives with respect to any Competing AIR Proposal, request the prompt return or destruction of all confidential information previously furnished and terminate access to any physical or electronic data rooms related to a potential Competing AIR Proposal previously granted to such person.

AIR will promptly, and in any event within 24 hours of AIR obtaining knowledge of the receipt thereof, advise Tenax orally and in writing of any Competing AIR Proposal or any inquiry relating to or that could reasonably be expected to lead to any Competing AIR Proposal, the financial and other material terms and conditions of any such Competing AIR Proposal or inquiry (including any changes thereto) and the identity of the person making any such Competing AIR Proposal. AIR will thereafter keep Tenax fully informed of the status and material details (including any change to the terms thereof) of any such Competing AIR Proposal or inquiry and provide to Tenax, as soon as practicable after receipt or delivery thereof (and in any event, within 24 hours of such receipt or delivery), unredacted copies of all correspondence (other than non-substantive written correspondence) and other written material (including all draft and final versions (and any amendments thereto) of agreements (including schedules and exhibits thereto) and any comments thereon) relating to any such Competing AIR Proposal or inquiry exchanged between AIR or any of its subsidiaries, on the one hand, and the person making such Competing AIR Proposal or inquiry, on the other hand.

Notwithstanding the above, AIR may, subject to compliance with the terms of the merger agreement, furnish information to, and enter into discussions with, a person who has made, after February 16, 2026, an unsolicited, written, bona fide Competing AIR Proposal, so long as such Competing AIR Proposal did not result from a breach of the merger agreement and prior to furnishing such information and entering into such discussions, the AIR Board:

•        reasonably determines, in its good faith judgment (after receiving the advice of a financial advisor of nationally recognized reputation and outside legal counsel qualified to practice in the State of Nevada and experienced in matters of Nevada corporate law) that such Competing AIR Proposal constitutes, or is reasonably likely to lead to, a Superior Proposal and the failure to furnish such information to, or enter into such discussions with, the person who made such Competing AIR Proposal would violate the AIR Board’s fiduciary duties under the NRS;

•        provides such information to Tenax (or provides such information to Tenax substantially concurrent with the time it is provided to such person); and

•        obtains from such person a confidentiality agreement that contains terms no less favorable to AIR than those contained in the existing confidentiality agreement between AIR and Tenax.

As used in this proxy statement/prospectus:

•        the term “Competing AIR Proposal” means any inquiry, proposal or offer from any person relating to, or that would reasonably be expected to lead to, in one transaction or a series of related transactions (other than the merger), (a) any merger, consolidation, share exchange, business combination, recapitalization, liquidation, dissolution or other similar transaction involving AIR or any of its subsidiaries pursuant to which any person or the shareholders of any person would own 15% or more of any class of equity securities of AIR or of any resulting parent company of AIR; (b) any sale, lease, license, exchange, transfer or other disposition of, or joint venture involving, assets or businesses that constitute or represent more than 15% of the total revenue, operating income, EBITDA or fair market value of the assets of AIR and its subsidiaries, taken as a whole; (c) any sale, exchange, transfer or other disposition of more than 15% of any class of equity securities, or securities convertible into or exchangeable for equity securities, of AIR; (d) any tender offer or exchange offer that, if consummated, would result in any person becoming the beneficial owner of more than 15% of any class of equity securities of AIR; (e) any other transaction the consummation of which would be reasonably likely to impede, interfere with, prevent or materially delay the merger; or (f) any combination of the foregoing; and

•        the term “Superior Proposal” means an unsolicited written bona fide offer made by a third party with respect to a Competing AIR Proposal (other than pursuant to clause (e) of such definition above) which the AIR Board reasonably determines, in its good-faith judgment, after having received the advice of a financial advisor of nationally recognized reputation and outside legal counsel, to be (a) more favorable to the AIR stockholders from a financial point of view (after taking into account all of the terms and conditions of such proposal, including the sources and terms of any financing, financing market conditions and the existence of a financing contingency) than the merger (after taking into account any changes to the financial terms of the merger agreement proposed by Tenax in response to such offer or otherwise) and (b) reasonably expected to be consummated on the terms so proposed. For the purposes of the definition of “Superior Proposal”, each reference to “15%” in the definition of “Competing AIR Proposal” shall be replaced with “75%”.

Change in the AIR Recommendation

The AIR Board has made the AIR Recommendation. In connection with the AIR Recommendation, the merger agreement provides that the AIR Board, or any committee thereof, may not:

•        fail to make, withdraw, qualify, modify or amend, or publicly propose to fail to make, withdraw, qualify, modify or amend the AIR Recommendation;

•        fail to include the AIR Recommendation in this proxy statement/prospectus;

•        adopt or recommend, or propose publicly to adopt or recommend, any Competing AIR Proposal;

•        enter into any agreement relating to a Competing AIR Proposal (except as otherwise specified in the merger agreement); or

•        make any public statement that is inconsistent with the AIR Recommendation.

However, prior to the receipt of the requisite AIR stockholder approvals, the AIR Board may take any of the foregoing actions (any such action, a “Change in the AIR Recommendation”) if, in response to the receipt of an unsolicited, written, bona fide Competing AIR Proposal received after February 16, 2026 or the occurrence of an Intervening Event, the AIR Board determines in its good-faith judgment (after having received the advice of a financial advisor of nationally recognized reputation and outside legal counsel qualified to practice in the State of Nevada and experienced in matters of Nevada corporate law) that its failure to make a Change in the AIR Recommendation would violate the fiduciary duties of the AIR Board under the NRS. Further, the AIR Board may not make a Change in the AIR Recommendation unless the following criteria are met:

•        if the AIR Board is making a Change in the AIR Recommendation relating to a Competing AIR Proposal, such Competing AIR Proposal constitutes a Superior Proposal;

•        AIR provides written notice to Tenax that the AIR Board intends to make a Change in the AIR Recommendation, specifies the reasons therefor, including a description of any Intervening Event in reasonable detail or the terms and conditions of any Superior Proposal, and includes an unredacted copy of any proposed agreement relating to such Superior Proposal;

•        AIR provides a period of five business days following Tenax’s receipt of such notice during which AIR will negotiate in good faith with Tenax regarding any revisions to the terms of the merger agreement proposed by Tenax (provided that any material change regarding such Intervening Event, or any amendments to the financial terms or any other material term of such Superior Proposal will require a new notice period of three business days); and

•        at the end of such notice period, the AIR Board again makes a determination in good faith after consultation with its outside legal counsel and financial advisors (and taking into account any adjustment or modification of the terms of the merger agreement proposed by Tenax) that the Competing AIR Proposal continues to be a Superior Proposal and that the Change in the AIR Recommendation is required to comply with the AIR Board’s fiduciary duties under the NRS.

As used in this proxy statement/prospectus, the term “Intervening Event” means any material event, fact, circumstance, effect, development or occurrence that (a) was not known to, or reasonably foreseeable by, the AIR Board as of February 16, 2026 or, if known, the material consequences of which were not known or reasonably foreseeable as of the date hereof and (b) does not involve or relate to the receipt, existence or terms of any Competing AIR Proposal. However, no event, fact, circumstance, effect, development or occurrence arising out of, or resulting from, the following should constitute or be taken into account in determining whether an Intervening Event has occurred:

•        any Competing AIR Proposal or any actual or potential acquisition of assets or businesses from AIR or any of its subsidiaries;

•        any change in the market price, trading volume or credit ratings of AIR common stock or any failure, in and of itself, to meet internal or public revenue or earnings projections, forecasts, guidance, estimates, milestones or budgets for any period ending (or for which revenues or earnings are released) on or after February 16, 2026 (provided that the facts or causes underlying or contributing to such change or failure shall be considered in determining whether an Intervening Event has occurred);

•        changes in general economic, legal, regulatory or political conditions, or in the financial, credit or capital markets in general;

•        changes in applicable law or GAAP, or in any interpretation thereof;

•        changes in the markets or industries in which AIR and its subsidiaries operate (including legal and regulatory changes);

•        acts of civil unrest or war (whether or not declared), armed hostilities or terrorism or any escalation or worsening of any acts of civil unrest or war (whether or not declared), armed hostilities or terrorism under way as of February 16, 2026;

•        earthquakes, hurricanes, tsunamis, tornadoes, floods, mudslides, volcanic eruptions or other natural disasters or any epidemic or pandemic;

•        any changes resulting or arising from the identity of Tenax or any of its affiliates; or

•        the public announcement, pendency or performance of the merger agreement.

AIR has agreed to include the AIR Recommendation in this proxy statement/prospectus, unless the AIR Board makes a Change in the AIR Recommendation as permitted under the merger agreement prior to the date of distribution of this proxy statement/prospectus.

In no event will any such Change in the AIR Recommendation affect the validity and enforceability of the merger agreement or the other transaction documents, including the obligations of AIR and the AIR stockholders that are party to the transaction documents to consummate the merger or the other Transactions.

No Solicitation by Tenax

Tenax has agreed that none of it or any of its subsidiaries or any of their respective representatives will, and that it will cause each of its subsidiaries and each of its and its subsidiaries’ representatives not to, directly or indirectly, (i) solicit, initiate, seek or take any other action to facilitate or encourage the making, submission or announcement of any proposal that constitutes, or could reasonably be expected to lead to, any Competing Tenax Proposal; (ii) enter into, maintain, continue or participate in any discussions or negotiations with any person or entity in furtherance of, or furnish to any person any information or otherwise cooperate in any way with respect to, any Competing Tenax Proposal; (iii) agree to, approve, endorse, recommend or consummate any Competing Tenax Proposal; (iv) enter into, or propose to enter into, any contract or agreement which could reasonably be expected to lead to any Competing Tenax Proposal; or (v) resolve, propose or agree, or authorize or permit any representative, to do any of the foregoing.

In addition, Tenax has agreed to, and to cause its subsidiaries and its and its subsidiaries’ representatives to, immediately cease and cause to be terminated all existing discussions or negotiations with any persons conducted prior to the execution of the merger agreement by Tenax, any of its subsidiaries or its or any of their respective representatives with respect to any Competing Tenax Proposal, request the prompt return or destruction of all confidential information previously furnished and terminate access to any physical or electronic data rooms related to a potential Competing Tenax Proposal previously granted to such person.

Tenax will promptly, and in any event within 24 hours of Tenax obtaining knowledge of the receipt thereof, advise AIR orally and in writing of any Competing Tenax Proposal or any inquiry relating to or that could reasonably be expected to lead to any Competing Tenax Proposal, the financial and other material terms and conditions of any such Competing Tenax Proposal or inquiry (including any changes thereto) and the identity of the person making any such Competing Tenax Proposal. Tenax will thereafter keep AIR fully informed of the status and material details (including any change to the terms thereof) of any such Competing Tenax Proposal or inquiry and provide to AIR, as soon as practicable after receipt or delivery thereof (and in any event, within 24 hours of such receipt or delivery), unredacted copies of all correspondence (other than non-substantive written correspondence) and other written material (including all draft and final versions (and any amendments thereto) of agreements (including schedules and exhibits thereto) and any comments thereon) relating to any such Competing Tenax Proposal or inquiry exchanged between Tenax or any of its subsidiaries, on the one hand, and the person making such Competing Tenax Proposal or inquiry, on the other hand.

Notwithstanding the above, Tenax may, subject to compliance with the terms of the merger agreement, furnish information to, and enter into discussions with, a person who has made, after February 16, 2026, an unsolicited, written, bona fide Competing Tenax Proposal, so long as such Competing Tenax Proposal did not result from a breach of the merger agreement and, prior to furnishing such information and entering into such discussions, the Tenax Board obtains from such person a confidentiality agreement that contains terms no less favorable to Tenax than those contained in the existing confidentiality agreement between AIR and Tenax.

As used in this proxy statement/prospectus, the term “Competing Tenax Proposal” means any inquiry, proposal or offer from any person relating to, or that would reasonably be expected to lead to, in one transaction or a series of related transactions (other than the merger), (a) any merger, consolidation, share exchange, business combination, recapitalization, liquidation, dissolution or other similar transaction involving Tenax or any of its subsidiaries pursuant to which any person or the shareholders of any person would own 15% or more of any class of equity securities of Tenax or of any resulting parent company of Tenax; (b) any sale, lease, license, exchange, transfer or other disposition of, or joint venture involving, assets or businesses that constitute or represent more than 15% of the total revenue, operating income, EBITDA or fair market value of the assets of Tenax and its subsidiaries, taken as a whole; (c) any sale, exchange, transfer or other disposition of more than 15% of any class of equity securities, or securities convertible into or exchangeable for equity securities, of Tenax; (d) any tender offer or exchange offer that, if consummated, would result in any person becoming the beneficial owner of more than 15% of any class of equity securities of Tenax; (e) any other transaction the consummation of which would be reasonably likely to impede, interfere with, prevent or materially delay the merger; or (f) any combination of the foregoing.

Access to Information

AIR has agreed that it will, and will cause its subsidiaries to, (i) provide to Tenax and its representatives reasonable access during normal business hours upon reasonable prior notice to the officers, employees and other personnel, agents, properties, offices and other facilities of AIR and its subsidiaries and to their books and records and (ii) furnish promptly to Tenax such information concerning the business, properties, contracts, assets, liabilities, personnel and other aspects of AIR and its subsidiaries as Tenax or its representatives may reasonably request, subject to certain exceptions and limitations. Tenax has agreed to provide to AIR and its representatives reasonable access during normal business hours upon reasonable prior notice to Tenax’s personnel and records on a basis consistent with AIR’s access to such personnel and records prior to February 16, 2026.

Employee Matters

For one year following the effective time, AIR will, or will cause its subsidiaries to, provide each employee of AIR or its subsidiaries, as of immediately prior to the effective time, who continues to be employed by AIR or the surviving company after the closing date with (i) a base salary or wage rate, as applicable, and annual cash target bonus opportunity that is not less than the base salary or wage rate, as applicable, and annual cash target bonus opportunity provided to such employee immediately prior to the effective time and (ii) other employee benefits (including severance benefits) that are no less favorable in the aggregate than either, as determined by AIR in its sole discretion, (A) those provided by AIR and its subsidiaries immediately prior to the effective time or (B) those provided by Tenax to similarly situated employees immediately prior to the effective time. Notwithstanding anything to the contrary in the merger agreement, the terms and conditions of employment for any employee of AIR or its subsidiaries covered by any of AIR’s collective bargaining agreements will continue to be governed by such collective bargaining agreement.

The merger agreement provides that the foregoing employee matters provisions are solely for the benefit of the parties to the merger agreement, no third party has any rights under such provisions and such provisions do not (i) amend any compensation or benefit plan, program, policy, agreement or arrangement; (ii) obligate AIR or the surviving company or any of their respective subsidiaries to maintain any benefit plan or arrangement or retain the employment of any particular employee; or (iii) prevent AIR or the surviving company or any of their respective subsidiaries from amending or terminating any plan or arrangement (in each case, other than as provided in such provisions).

Directors’ and Officers’ Indemnification and Insurance

AIR has agreed to cause the surviving company, to the fullest extent permitted by the NRS, to honor all rights to indemnification and exculpation from liabilities, including advancement of expenses, existing in favor of the current or former directors or officers of AIR or its subsidiaries at or prior to the effective time for acts or omissions occurring at or prior to the effective time, as such indemnification provisions are provided for in the articles of incorporation and bylaws of AIR or indemnification agreements between AIR and such individuals. Such obligations will survive the Transactions in full force and effect in accordance with their terms.

Subject to certain limitations, AIR will maintain, for the three-year period commencing immediately after the effective time, a directors’ and officers’ liability insurance policy with an insurance carrier with the same or better credit rating as AIR’s insurance carrier as of February 16, 2026 covering acts or omissions occurring at or prior to the effective time with respect to those individuals who are currently (and any individuals who prior to the effective time become) covered by AIR’s directors’ and officers’ liability insurance policies, on terms, conditions, retentions and limits of liability that are at least as favorable as AIR’s existing policies in effect on February 16, 2026. AIR will be permitted, prior to the effective time, to obtain and fully pay the premium for the extension of (i) the directors’ and officers’ liability coverage of AIR’s existing directors’ and officers’ insurance policies and (ii) AIR’s existing fiduciary liability insurance policies, in each case for a claims reporting period or discovery period of three years from the effective time, which will be from an insurance carrier with the same or better credit rating as AIR’s insurance carrier as of February 16, 2026, with terms, conditions, retentions and limits of liability that are at least as favorable as AIR’s existing policies in effect on February 16, 2026; provided, however, that in no event shall Tenax or AIR be required to expend for any policies an aggregate amount in excess of 300% of the annual premiums currently paid by AIR for such insurance.

In the event that AIR or any of its successors or assigns (i) consolidates with or merges into any other person and ceases to be the continuing or surviving corporation or entity of such consolidation or merger or (ii) transfers all or substantially all of its properties and assets to any person, then, and in each such case, the surviving company will ensure that AIR will assume the obligations described above.

Reasonable Best Efforts; Further Action

Subject to the terms and conditions of the merger agreement, each party has agreed to use its reasonable best efforts to take, or cause to be taken, all actions that are necessary, proper or advisable to consummate and make effective the Transactions, including using its reasonable best efforts to accomplish the following:

•        the satisfaction of the conditions precedent to the merger;

•        the obtaining of all necessary actions or nonactions and consents from, and the giving of any necessary notices to, governmental authorities and the making of all necessary registrations, declarations and filings (including registrations, declarations and filings with, or notices to, governmental authorities that may be required or advisable under the Antitrust Laws, if any);

•        the taking of all reasonable steps to provide any supplemental information requested by any governmental authority, including participating in meetings with officials of such entity in the course of its review of the merger agreement or the Transactions;

•        the taking of all reasonable steps as may be necessary to avoid any action by any governmental authority or third party that would otherwise have the effect of materially delaying or preventing the consummation of the merger; and

•        the defending or contesting of any actions challenging the merger agreement or the consummation of the merger, including seeking to have any stay or temporary restraining order entered by any court or other governmental authority vacated or reversed.

Each of AIR and the AIR Board will take all actions necessary to ensure that the Transactions will be consummated as promptly as practicable if any state takeover statute or similar statute or regulation is or becomes applicable to the merger agreement and to minimize the effect of such statute or regulation on the merger agreement and the Transactions. However, in no event will Tenax or its affiliates, including AIR, be required to agree to or accept (i) any prohibition of or limitation on its or their ownership, or any limitation that would affect its or their operation, of any portion of their respective businesses or assets, including after giving effect to the Transactions; (ii) any commitment, undertaking or order to divest, hold separate or otherwise dispose of any portion of its or their respective businesses or assets, including after giving effect to the Transactions; (iii) any limitation on the ability of the Tenax Members to acquire or hold or exercise full rights of ownership of any capital stock of AIR or its subsidiaries, including after giving effect to the Transactions; or (iv) any other limitation on its or their ability to, or the manner in which they, operate, conduct or control their respective businesses or operations, including after giving effect to the Transactions.

Pursuant to the merger agreement, Tenax will determine and direct the strategy and process by which the parties will seek required approvals relating to Antitrust Laws. Tenax and AIR have agreed that neither party will make any filings, submissions or substantive written communications to any governmental authority to obtain consents to the merger under Antitrust Laws without first providing a written copy of such filing, submission or communication to the other party (or as appropriate to such party’s outside counsel) and allowing the other party a reasonable opportunity to provide comments on such filing, submission or communication prior to submission. Tenax and AIR have agreed to incorporate all reasonable comments of the other party (or as appropriate such party’s outside counsel) with respect to such filings, submissions and communications prior to delivery of the same to any governmental authority.

Payoff Letters

AIR will deliver to Tenax at or prior to the closing executed payoff letters in customary form reasonably satisfactory to Tenax in respect of certain indebtedness of AIR, which shall indicate the total amount required to be paid to fully satisfy all principal, interest, prepayment premiums, penalties, breakage costs or similar obligations under such indebtedness and state that upon receipt of such amount, the applicable indebtedness and instruments evidencing such indebtedness shall be terminated. Further, AIR will make arrangements for the holders of such indebtedness to deliver to Tenax at or as soon as practicable after the closing all possessory collateral then in its possession and all lien release documents and filings with respect to all liens in or upon the assets or properties of AIR and its subsidiaries securing such indebtedness.

Stockholder Litigation

The merger agreement requires that AIR, orally and in writing, provide Tenax with prompt notice of any litigation commenced or, to AIR’s knowledge, threatened against AIR and/or its directors or executive officers relating to the merger agreement, the merger or the other Transactions, and that AIR keep Tenax promptly and reasonably informed regarding any such litigation. AIR has agreed to give Tenax the opportunity to participate in the defense or settlement of any such litigation and shall give due consideration to Tenax’s views with respect thereto. Further, AIR may not agree to any settlement of any such litigation without Tenax’s prior written consent (such consent not to be unreasonably withheld, conditioned or delayed).

AIR Charter Amendment and Reverse Stock Split

Assuming, and promptly following the receipt of the approval of the authorized shares proposal at the special meeting of AIR stockholders, AIR will cause the related amendment to AIR’s articles of incorporation to be filed with the Nevada Secretary of State in such form as required by, and executed in accordance with, the relevant provisions of the NRS. Following the effectiveness of that amendment but prior to the closing, AIR will cause a certificate of change to be filed with the Nevada Secretary of State to effect the reverse stock split in accordance with NRS 78.207.

Certain Additional Covenants and Agreements

The merger agreement contains certain other covenants and agreements, including, among others, covenants relating to the preparation and filing of this proxy statement/prospectus, notices of certain events, the listing of the shares of AIR common stock to be issued in the merger, public announcements relating to the merger agreement and the Transactions, certain tax matters, exemption from takeover laws, certain director and officer resignations and the execution of a redemption rights agreement for the benefit of AIR stockholders and a registration rights agreement with the Tenax Members. These agreements are discussed in “Other Related Agreements” beginning on page 87 of this proxy statement/prospectus.

Conditions to Completion of the Merger

The respective obligations of each of Tenax, AIR and Merger Sub to consummate the merger are subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the effectiveness under the Securities Act of the registration statement of which this proxy statement/prospectus forms a part, the absence of any stop order suspending that effectiveness issued by the SEC and the absence of any proceeding for that purpose pending before the SEC;

•        the receipt of approvals for the stock issuance proposal, the authorized shares proposal and the written consent proposal, in accordance with the NRS and AIR’s articles of incorporation and bylaws;

•        the absence of any order or injunction enacted, issued, promulgated, enforced or entered, whether temporary, preliminary or permanent, which is then in effect and has the effect of enjoining, restraining, prohibiting or otherwise preventing the consummation of the Transactions;

•        the expiration or termination of any waiting period (and any extension thereof) applicable to the merger under the HSR Act and the receipt of any approval or the termination or expiration of any waiting period with respect to any applicable Antitrust Laws of certain other specified jurisdictions;

•        the authorization for listing on the NYSE American of the shares of AIR common stock issuable to the Tenax Members in connection with the merger, subject to official notice of issuance; and

•        the receipt of the approval of the merger by the holders of a majority in voting power of the issued and outstanding membership units of Tenax, which approval was obtained by the execution of the Tenax Member Support Agreement. Accordingly, this condition has been satisfied, and no meeting of the Tenax Members will be held. See the section entitled “Other Related Agreements — Tenax Member Support Agreement” beginning on page 89 of this proxy statement/prospectus.

The obligations of Tenax to consummate the merger are further subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the accuracy of the representations and warranties made in the merger agreement by AIR and Merger Sub as of February 16, 2026 and as of the closing date, subject to certain materiality thresholds;

•        performance or compliance in all material respects by AIR and Merger Sub with the agreements and covenants required by the merger agreement to be performed or complied with by them at or prior to the effective time;

•        the receipt by Tenax of a certificate, dated the closing date, signed by the Chief Executive Officer or Chief Financial Officer of AIR, certifying that the conditions in the preceding two bullet points are satisfied;

•        the absence, since February 16, 2026 through the closing date, of any event, occurrence, state of facts, development, circumstance, change or effect that, individually or in the aggregate, has had or would have been reasonably expected to have an AIR Material Adverse Effect;

•        the absence of any pending action by any governmental authority and the absence of any order or injunction by any governmental authority of competent jurisdiction which imposes or seeks to impose any limitations or restrictions on Tenax and its subsidiaries; and

•        the effectiveness of the AIR Stockholder Support Agreement at the effective time.

The obligations of AIR and Merger Sub to consummate the merger are further subject to the satisfaction or waiver (where permissible under applicable law) at or prior to the effective time of the following conditions:

•        the accuracy of the representations and warranties made in the merger agreement by Tenax as of February 16, 2026 and as of the closing date, subject to certain materiality thresholds;

•        performance or compliance in all material respects by Tenax with the agreements and covenants required by the merger agreement to be performed or complied with by it at or prior to the effective time;

•        the absence, since February 16, 2026 through the closing date, of any event, occurrence, state of facts, development, circumstance, change or effect that, individually or in the aggregate, has had or would have been reasonably expected to have a Tenax Material Adverse Effect; and

•        the receipt by AIR of a certificate, dated the closing date, signed by the President or Chief Financial Officer of Tenax, certifying that the conditions in the preceding two bullet points are satisfied.

Termination of the Merger Agreement

The merger agreement may be terminated and the Transactions may be abandoned at any time before the effective time as follows:

•        by mutual written consent of Tenax and AIR, duly authorized by the Tenax Board and the AIR Board, respectively;

•        by either AIR or Tenax, following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal;

•        by either AIR or Tenax, if any order or injunction that has the effect of enjoining, restraining, prohibiting or otherwise preventing the consummation of the Transactions has become final and non-appealable (provided that the party seeking to terminate the merger agreement pursuant to this bullet point has complied in all material respects with its covenants and agreements under the merger agreement regarding the use of efforts to consummate the Transactions);

•        by either AIR or Tenax, if the effective time has not occurred on or before 11:59 P.M., Eastern Time, on November 30, 2026 (the “Outside Date”) (provided that the right to terminate the merger agreement pursuant to this bullet point will not be available to (i) any party whose failure to fulfill any obligation under the merger agreement or intentional breach has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time; (ii) AIR if any Key AIR Stockholder’s material breach of its obligations under the AIR Stockholder Support Agreement has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time; or (iii) Tenax if any Tenax Member’s material breach of its obligations under the Tenax Member Support Agreement has been a material cause of, or resulted in, the failure of the effective time to occur on or before such time);

•        by Tenax, upon a breach by either of AIR or Merger Sub of, or a failure by AIR or Merger Sub to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by AIR or Merger Sub, as applicable, of written notice of such breach or failure (provided that Tenax will not have the right to terminate the merger agreement pursuant to this bullet point if Tenax is in material breach of its representations, warranties or covenants at the time of such termination);

•        by Tenax, if a Change in the AIR Recommendation shall have occurred;

•        by AIR, upon a breach by Tenax of, or a failure by Tenax to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied, and such breach or failure is incapable of being cured by the Outside Date or, if curable by the Outside Date, is not cured within 30 days of receipt by Tenax of written notice of such breach or failure (provided that AIR will not have the right to terminate the merger agreement pursuant to this bullet point if AIR is in material breach of its representations, warranties or covenants at the time of such termination);

•        by AIR, if Tenax fails to close the merger within three business days after all closing conditions have been satisfied or waived or AIR’s delivery of a written notice to Tenax that all of Tenax’s closing conditions have been satisfied or waived or that AIR is willing to waive any unsatisfied conditions; or

•        by AIR, to accept a Superior Proposal.

In addition, the merger agreement may be terminated by Tenax if the Key AIR Stockholders fail to duly execute and deliver, or cause to be delivered, to Tenax the AIR Stockholder Support Agreement within 72 hours following the execution and delivery of the merger agreement. The Key AIR Stockholders have delivered to Tenax the AIR Stockholder Support Agreement within 72 hours following the execution and delivery of the merger agreement.

In addition, the merger agreement may be terminated by AIR if the Tenax Members party to the Tenax Member Support Agreement fail to duly execute and deliver, or cause to be delivered, to AIR the Tenax Member Support Agreement within 72 hours following the execution and delivery of the merger agreement. The requisite Tenax Members have delivered to AIR the Tenax Member Support Agreement within 72 hours following the execution and delivery of the merger agreement.

In the event of the termination of the merger agreement, the merger agreement will become void and there will be no liability under the merger agreement on the part of any party thereto or their respective subsidiaries or representatives, except that certain specified provisions, including certain provisions described below under “— Expenses and Termination Fees”, will survive termination. However, no party will be relieved from liability for fraud committed prior to such termination or willful material breach of any of its representations, warranties, covenants or agreements set forth in the merger agreement prior to such termination (provided, however, that the confidentiality agreement between AIR and Tenax entered into prior to the merger agreement will survive any termination of the merger agreement).

Expenses and Termination Fees

Expenses

All expenses incurred in connection with the merger agreement and the Transactions will be paid by the party incurring such expenses, except that expenses constituting the out-of-pocket cost of filing fees, printing and mailing of this proxy statement/prospectus (excluding, for the avoidance of doubt, the fees and expenses of AIR’s legal counsel) and the filing fees for the pre-merger notification and report forms under the HSR Act (excluding, for the avoidance of doubt, the fees and expenses of AIR’s legal counsel) will be paid by Tenax.

Termination Fees and Expense Reimbursement

The merger agreement requires AIR to pay Tenax the AIR Termination Fee if:

•        AIR terminates the merger agreement to accept a Superior Proposal;

•        Tenax terminates the merger agreement following a Change in the AIR Recommendation; or

•        each of the following requirements are satisfied:

•        either AIR or Tenax terminates the merger agreement following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal; or, AIR or Tenax terminates the merger agreement if the effective time has not occurred by 11:59 P.M., Eastern Time, on the Outside Date; or Tenax terminates the merger agreement upon a breach by AIR or Merger Sub of, or a failure by AIR or Merger Sub to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied by the Outside Date (provided that Tenax is not in material breach of any of its representations, warranties or covenants);

•        prior to such termination, a Competing AIR Proposal has been publicly announced or become publicly known; and

•        AIR enters into a definitive agreement in respect of such Competing AIR Proposal and such transaction is consummated within 12 months after such termination.

In no event will AIR be required to pay the AIR Termination Fee on more than one occasion. In the event the AIR Termination Fee is required to be paid and is paid to Tenax, such payment of the AIR Termination Fee will be the sole and exclusive monetary remedy under the merger agreement of Tenax and its subsidiaries and Tenax’s

and its subsidiaries’ respective current, former or future equityholders, employees, directors, officers, affiliates or representatives, and none of AIR, Merger Sub or their respective current, former or future equityholders, employees, directors, officers, affiliates or representatives will have any further monetary liability or obligation relating to or arising out of the merger agreement or the Transactions.

If either AIR or Tenax terminates the merger agreement following a meeting of the AIR stockholders at which the AIR stockholders fail to approve the stock issuance proposal, the authorized shares proposal and the written consent proposal, AIR shall further reimburse Tenax for Tenax’s reasonable and documented out-of-pocket costs and expenses incurred in connection with the merger agreement and the Transactions, up to $500,000.

The merger agreement requires Tenax to pay AIR the Tenax Termination Fee if:

•        AIR terminates the merger agreement upon a breach by Tenax of, or a failure by Tenax to perform, any representation, warranty, covenant or agreement set forth in the merger agreement such that the related closing conditions would not be satisfied by the Outside Date (provided that AIR is not in material breach of any of its representations, warranties or covenants);

•        AIR terminates the merger agreement following Tenax’s failure to close the merger within three business days after all closing conditions have been satisfied or waived or AIR’s delivery of a written notice to Tenax that all of Tenax’s closing conditions have been satisfied or waived or that AIR is willing to waive any unsatisfied conditions; or

•        Tenax terminates the merger agreement if the effective time has not occurred by 11:59 P.M., Eastern Time, on the Outside Date, and at such time AIR could have terminated the merger agreement due to either of the two circumstances listed above.

In no event will Tenax be required to pay the Tenax Termination Fee on more than one occasion. In the event the Tenax Termination Fee is required to be paid and is paid to AIR, such payment of the Tenax Termination Fee will be the sole and exclusive monetary remedy under the merger agreement of AIR and its subsidiaries and AIR’s and its subsidiaries’ respective current, former or future equityholders, employees, directors, officers, affiliates or representatives, and none of Tenax, its subsidiaries or their respective current, former or future equityholders, employees, directors, officers, affiliates or representatives will have any further monetary liability or obligation relating to or arising out of the merger agreement or the Transactions.

Amendments and Waivers

The merger agreement may be amended by the parties thereto by action taken by or on behalf of their respective boards of directors at any time prior to the effective time. However, after the requisite AIR stockholder approvals have been obtained, there may not be any amendment that by applicable law or in accordance with the rules of any stock exchange requires further approval by the AIR stockholders without such further approval of the AIR stockholders. The merger agreement may only be amended by an instrument in writing signed by each of the parties thereto.

At any time prior to the effective time, any party to the merger agreement may, to the extent legally allowed, (a) extend the time for the performance of any of the obligations or other acts of any other party, (b) waive any breach of or inaccuracy in the representations and warranties made by any other party and (c) waive compliance with any agreement of any other party or any condition to its own obligations.

No Third-Party Beneficiaries

The merger agreement is not intended to and does not confer upon any person other than the parties to the merger agreement any rights or remedies, other than with respect to certain provisions related to the indemnification of AIR directors and officers.

Specific Performance

Prior to the termination of the merger agreement, each party will be entitled to an injunction or injunctions to prevent breaches of the merger agreement and to enforce specifically the performance of the terms of the merger agreement, in addition to any other remedy at law or in equity.

Governing Law

The merger agreement is governed by Nevada law, without giving effect to conflicts of laws principles that would result in the application of the law of any other state. All actions arising out of or relating to the merger agreement or the Transactions will be heard and determined exclusively in the Eighth Judicial District Court of the State of Nevada in Clark County, Nevada (and, if jurisdiction is vested exclusively in the federal courts, the United States District Court for the District of Nevada).

Tax Matters

AIR and Tenax intend that, for U.S. federal income tax purposes, the merger qualifies as a tax-free exchange pursuant to Section 351(a) of the Code and will be treated in a manner consistent with Situation 3 of IRS Revenue Ruling 84-111.

OTHER RELATED AGREEMENTS

Redemption Rights Agreement

The following is a summary of the material provisions of the redemption rights agreement to be entered into by AIR and the Rights Agent and is qualified in its entirety by reference to the full text of the form of such redemption rights agreement attached as Annex C to this proxy statement/prospectus and incorporated by reference into this proxy statement/prospectus.

Prior to the closing, AIR will enter into a redemption rights agreement with the Rights Agent that will govern the exercise of Redemption Rights by certain eligible AIR stockholders. Prior to the closing, AIR will declare and issue, as a dividend to AIR stockholders as of the trading day immediately preceding the closing date (the “Rights Record Date”), a right to cause AIR to redeem shares of AIR common stock that such AIR stockholders then own and continue to own on the first anniversary of the closing. The Redemption Rights will entitle the holders thereof to require AIR to purchase all or a portion of such AIR stockholder’s shares of AIR common stock for a redemption price, payable in cash, equal to 107.3% of the Debt Adjusted AIR Share Price, if the volume weighted average price of AIR common stock during the 20 trading days preceding the first anniversary of the closing is lower than 107.3% of the Debt Adjusted AIR Share Price.

As of and after the Rights Record Date, the Redemption Rights will be evidenced solely by certificates (“Rights Certificates”) evidencing one Redemption Right for each share of AIR common stock owned as of the close of business on the Rights Record Date. As soon as practicable after the Rights Record Date, the Rights Agent will cause to be delivered to each beneficial owner of AIR common stock one or more Rights Certificates evidencing one Redemption Right for each share of AIR common stock owned as of the close of business on the Rights Record Date. The Redemption Rights and the Rights Certificates may not be sold, assigned or transferred, in whole or in part, in any manner. Any Redemption Right held by an AIR stockholder will automatically cease to exist upon any transfer, sale or assignment of beneficial ownership of the share of AIR common stock to which such Redemption Right relates.

To be eligible to exercise the Redemption Rights, an AIR stockholder must have been a beneficial owner of shares of AIR common stock as of the close of business on the Rights Record Date and must have remained continuously a beneficial owner of such shares of AIR common stock to be redeemed from the Rights Record Date until the expiration of the redemption period. An AIR stockholder who sells and repurchases shares of AIR common stock during such period will not be permitted to exercise the Redemption Rights with respect to such shares. Following the conclusion of the 20-trading-day measurement period ending on (and including) the trading day immediately preceding the first anniversary of the closing, AIR will, not later than the second business day after the end of such measurement period, provide written notice to each eligible AIR stockholder of the volume weighted average price of AIR common stock during such measurement period. If such volume weighted average price, rounded to the nearest cent, is lower than the redemption price (which will be equal to 107.3% of the Debt Adjusted AIR Share Price), such notice will confirm that the Redemption Rights may be exercised prior to the expiration time. If such volume weighted average price is equal to or in excess of the redemption price, such notice will state that the Redemption Rights may not be exercised and have expired and that AIR has terminated the redemption rights agreement.

The Redemption Rights will be exercisable during a period of 10 consecutive trading days commencing on the trading day immediately following the first anniversary of the closing. Any Redemption Rights not exercised prior to the expiration of such redemption period will automatically terminate and be of no further force or effect. To exercise the Redemption Rights, an eligible AIR stockholder must deliver to the Rights Agent and AIR a written notice of redemption, together with the relevant rights certificate and, to the extent such shares are certificated, the certificates representing the shares to be redeemed, duly endorsed for transfer to AIR, and any other certifications or supporting information requested by AIR to support that such stockholder is in fact an eligible AIR stockholder of such shares of AIR common stock to be redeemed from the Rights Record Date until the expiration of the redemption period. Not later than the business day immediately following the expiration of the redemption period, the Rights Agent will provide AIR with a detailed list of the names of the AIR stockholders who have submitted valid notices of redemption and the number of shares to be redeemed from such stockholders in accordance with such notices of redemption, together with copies thereof. Within two business days following receipt of such information, AIR will deposit with the Rights Agent by wire transfer of immediately available funds an amount sufficient to pay the redemption price for all shares duly submitted for redemption. The Rights Agent will thereupon

cause an amount in cash representing the aggregate redemption price for the shares redeemed by each eligible AIR stockholder to be delivered to or upon the order of such AIR stockholder not later than five business days after the expiration time.

If, after the Rights Record Date but prior to the first anniversary of the closing, AIR pays a share dividend or otherwise makes a distribution on its common stock payable in AIR common stock, subdivides the outstanding AIR common stock into a larger number of shares, combines the outstanding AIR common stock into a smaller number of shares or issues by reclassification of AIR common stock any shares of AIR common stock, then the redemption price will be proportionally adjusted such that, upon exercise of all of the Redemption Rights, the aggregate redemption prices with respect to all eligible shares will remain unchanged. If, after the Rights Record Date but prior to the first anniversary of the closing, AIR consummates any merger or sale of AIR (whether by merger, sale of shares or all or substantially all of AIR’s assets or otherwise), then no adjustment will be made to the number of shares associated with the Redemption Rights or the redemption price as a result of such fundamental transaction. In such event, an AIR stockholder who exercises the Redemption Rights with respect to such AIR stockholder’s shares will not be entitled to receive any shares, securities, cash or other property in respect of such shares to which holders of AIR common stock would otherwise be entitled as a result of such fundamental transaction. An AIR stockholder who does not exercise the Redemption Rights with respect to such AIR stockholder’s shares will remain entitled to receive any shares, securities, cash or other property to which holders of AIR common stock are entitled as a result of such fundamental transaction.

The redemption rights agreement will automatically terminate and be of no further force or effect on the date that is five business days after the expiration of the redemption period, provided that all disputes with respect to amounts payable to the AIR stockholders have been resolved and AIR has paid or caused to be paid or deposited with the Rights Agent all amounts payable to the AIR stockholders under the redemption rights agreement.

Registration Rights Agreement

The following is a summary of the material provisions of the registration rights agreement to be entered into by AIR, the Tenax Members, the Tenax Warrantholders and NTC Group and is qualified in its entirety by reference to the full text of the form of such registration rights agreement attached as Annex D to this proxy statement/prospectus and incorporated by reference into this proxy statement/prospectus.

At the closing, AIR, the Tenax Members, the Tenax Warrantholders and NTC Group, as Investors’ Representative, will enter into the registration rights agreement. The securities entitled to registration rights under the registration rights agreement consist of (a) shares of AIR common stock issued to the Tenax Members pursuant to the merger agreement, (b) shares of AIR common stock issuable upon exercise of the warrants held by the Tenax Warrantholders and (c) any other equity securities received with respect to or on account of the foregoing (collectively, the “Registrable Securities”), in each case subject to customary fall-away provisions.

Under the registration rights agreement, certain key holders (including NEH, Thomas Foley, Taran Bakker and their controlled affiliates and permitted transferees) have customary demand rights to require AIR to effect public offerings of Registrable Securities, including underwritten offerings, subject to certain limitations, including a minimum aggregate value threshold of $40,000,000 per offering (unless a lesser amount is then held by the demanding stockholder) and a limit of one underwritten offering in any 90-day period. The registration rights agreement also provides the Tenax Members and Tenax Warrantholders with customary “piggyback” registration rights, subject to customary withdrawal and cutback provisions.

These registration rights are subject to certain conditions and limitations, including AIR’s right to defer or suspend a registration statement during limited deferral periods for specified purposes, subject to an aggregate limit of one deferral period in any 12-month period not to exceed 90 days. AIR has agreed to be responsible for all offering expenses incurred in connection with the registration of the Registrable Securities, other than underwriting discounts and commissions, transfer taxes and certain underwriter fees not customarily paid by issuers. The parties to the registration rights agreement will provide each other customary indemnifications.

AIR Stockholder Support Agreement

The following is a summary of the material provisions of the AIR Stockholder Support Agreement and is qualified in its entirety by reference to the full text of the form of the AIR Stockholder Support Agreement, which is included as Exhibit A to the merger agreement attached as Annex A to this proxy statement/prospectus.

In connection with the execution of the original merger agreement, on February 16, 2026, certain directors and significant stockholders of AIR, referred to as the Key AIR Stockholders, entered into the AIR Stockholder Support Agreement with Tenax, pursuant to which the Key AIR Stockholders agreed, among other things, to vote their shares of AIR common stock in favor of the authorized shares proposal, the written consent proposal and the stock issuance proposal and against any competing proposal. The AIR Stockholder Support Agreement, which by its terms operates with reference to the merger agreement as amended from time to time, remains in full force and effect and was not amended in connection with the amendment and restatement of the merger agreement. As of [•], 2026, the record date for the special meeting, the Key AIR Stockholders beneficially owned, in the aggregate, shares of AIR common stock representing approximately [•]% of the voting power of the outstanding shares of AIR common stock entitled to vote at the special meeting. For information regarding the shares of AIR common stock beneficially owned by each Key AIR Stockholder, see the section entitled “Principal Holders of AIR Common Stock” beginning on page 179 of this proxy statement/prospectus.

Pursuant to the AIR Stockholder Support Agreement, each Key AIR Stockholder has agreed, from the date of the agreement until the earlier of the effective time and the termination of the merger agreement in accordance with its terms, among other things, to (i) vote, or cause to be voted, all shares of AIR common stock beneficially owned by such Key AIR Stockholder in favor of the authorized shares proposal, the written consent proposal and the stock issuance proposal and against any Competing AIR Proposal or any other action that would reasonably be expected to impede, interfere with, delay or prevent the consummation of the merger; (ii) not transfer or encumber such shares, subject to limited exceptions; and (iii) not solicit, initiate or participate in discussions regarding, or approve or enter into, any Competing AIR Proposal. Each Key AIR Stockholder has also agreed not to commence or join in, and to take all reasonable actions necessary to opt out of, any action against AIR or its directors and officers relating to the merger agreement or the Transactions, and has granted Tenax an irrevocable proxy to vote such Key AIR Stockholder’s shares in a manner consistent with the agreement solely with respect to the matters described above. In addition, each Key AIR Stockholder has irrevocably waived any and all notice, information and consent requirements and any rights of first refusal, rights of first offer, redemption rights, co-sale rights, registration rights, preemptive rights and any dissenter’s or appraisal rights that may be applicable to, or triggered by, the Transactions. The Key AIR Stockholders have delivered the AIR Stockholder Support Agreement to Tenax, and each Key AIR Stockholder is entering into the agreement solely in its capacity as a beneficial owner of shares of AIR common stock and not in any capacity as a director or officer of AIR. The AIR Stockholder Support Agreement is governed by Nevada law.

Tenax Member Support Agreement

The following is a summary of the material provisions of the Tenax Member Support Agreement and is qualified in its entirety by reference to the full text of the form of the Tenax Member Support Agreement, which is included as Exhibit B to the merger agreement attached as Annex A to this proxy statement/prospectus.

In connection with the execution of the merger agreement, Tenax, AIR and NEH, as the sole consenting member party thereto, entered into an amended and restated Tenax Member Support Agreement, dated as of July 2, 2026, which amended and restated the Tenax Member Support Agreement entered into in connection with the execution of the original merger agreement. NEH is the record and beneficial owner of 6,570,000 Class A-1 units of Tenax, representing approximately 79.81% of the outstanding Tenax units on a fully diluted basis and approximately 85.38% of the voting power of the outstanding Tenax units.

Pursuant to the Tenax Member Support Agreement, NEH, acting without a meeting in accordance with Section 404 of the DLLCA, irrevocably consented to, approved and adopted, in all respects, the merger, the merger agreement and the other transaction documents and the Transactions, including the distribution of the merger consideration in accordance with the Tenax closing capitalization schedule, and agreed that it will not revoke, rescind or otherwise modify its written consent. This written consent constituted the approval of the merger by holders of a majority in voting power of the issued and outstanding membership units of Tenax required under the merger agreement. Accordingly, the Tenax member approval condition to the completion of the merger has been satisfied, and no meeting of the Tenax Members will be held in connection with the merger.

The Tenax Member Support Agreement also provides that, until the earlier of the effective time and the termination of the merger agreement in accordance with its terms, NEH will not transfer or encumber its Tenax units (other than to certain permitted transferees that execute a joinder to the Tenax Member Support Agreement), will not, and will cause its controlled affiliates not to, solicit, participate in discussions or negotiations regarding, or approve, endorse or enter into any agreement with respect to, any Competing Tenax Proposal, and will not commence or join in, and will take all reasonable actions necessary to opt out of, any action against Tenax or its managers and officers relating to the merger agreement or the Transactions, including any claim challenging the validity of the merger agreement or alleging a breach of fiduciary duty in connection therewith. NEH has also waived any and all notice, information and consent requirements, as well as any right of first refusal, right of first offer, right of first negotiation, rights restricting share transfers, redemption rights, co-sale rights, registration rights, preemptive rights and other similar rights that may be applicable to, or triggered by, the Transactions, whether contained in AIR’s organizational documents, in any contractual obligation between AIR and NEH or under applicable law. The Tenax Member Support Agreement is governed by Nevada law.

Lock-Up Agreements

The following is a summary of the material provisions of the Lock-Up Agreements and is qualified in its entirety by reference to the full text of the form of Tenax Member Lock-Up Agreement, which is included as Exhibit C to the merger agreement attached as Annex A to this proxy statement/prospectus.

In connection with the execution of the original merger agreement, on February 16, 2026, each of Thomas Foley, Chairman of Tenax, and Taran Bakker, a director of Tenax, entered into a lock-up agreement with AIR (together, the “Lock-Up Agreements”). Pursuant to the Lock-Up Agreements, and subject to certain exceptions, without the prior written consent of AIR, Mr. Foley and Mr. Bakker have each agreed not to offer, sell, pledge, transfer or otherwise dispose of, or enter into any hedging or similar transaction with respect to, any shares of AIR common stock or securities convertible into or exercisable or exchangeable for AIR common stock held directly or indirectly by them, during the period commencing upon the closing and ending on the date that is 180 days after the closing date. The permitted exceptions include specified transfers by gift, for estate-planning purposes, by will or intestacy and to affiliates and other related transferees, in each case subject to the transferee agreeing to be bound by the restrictions in the Lock-Up Agreements. The shares of AIR common stock subject to the Lock-Up Agreements will not constitute unrestricted publicly-held shares for purposes of the NYSE American initial listing requirements during the restricted period. See the section entitled “Risk Factors — Risks Relating to the Merger — If the combined company fails to comply with the initial listing requirements of the NYSE American, shares of AIR common stock could face possible delisting, which would result in, among other things, a limited public market for shares of AIR common stock and make obtaining future debt or equity financing more difficult for us.” beginning on page 23 of this proxy statement/prospectus.

MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE TRANSACTIONS

The following discussion is the opinion of Ellenoff Grossman & Schole LLP and is based on the material U.S. federal income tax consequences to holders of AIR common stock with respect to (i) the Transactions and (ii) the post-Transactions ownership and disposition of AIR common stock. This summary applies only to holders of AIR common stock that hold such stock as capital assets for U.S. federal income tax purposes (generally, property held for investment). This summary is general in nature and does not constitute tax advice. This summary does not discuss all aspects of U.S. federal income taxation that might be relevant to a particular holder of AIR common stock in light of such holder’s individual circumstances or status, nor does it address tax consequences applicable to holders of AIR common stock subject to special rules, such as:

•        dealers in securities or foreign currency;

•        broker-dealers;

•        traders in securities that elect to use a mark-to-market method of accounting;

•        tax-exempt organizations;

•        financial institutions, banks or trusts;

•        mutual funds;

•        life insurance companies, real estate investment trusts and regulated investment companies;

•        holders that actually or constructively own 10% or more of AIR’s common stock;

•        holders that hold AIR common stock as part of a hedge, straddle, constructive sale, conversion transaction or other integrated investment;

•        holders that have a functional currency other than the U.S. dollar;

•        holders that received AIR common stock through the exercise of employee stock options, through a tax-qualified retirement plan or otherwise as compensation;

•        U.S. expatriates;

•        controlled foreign corporations;

•        persons subject to special tax accounting rules as a result of any item of gross income with respect to AIR common stock being taken into account in an “applicable financial statement” (as defined in the Code);

•        passive foreign investment companies; or

•        pass-through entities or investors in pass-through entities.

This summary is based on the Code, applicable U.S. Department of Treasury (the “Treasury”) regulations thereunder, and judicial and administrative interpretations thereof, all as in effect as of the date of this proxy statement/prospectus, and all of which may change, possibly with retroactive effect. Any such change could affect the conclusions discussed below. Consummation of the Transactions is not conditioned on the receipt of any tax opinion with respect to the tax treatment of holders of AIR common stock. Furthermore, no assurance can be given that the IRS will agree with this discussion or that, if the IRS were to take a contrary position, such position ultimately would not be sustained by the courts.

This summary does not address U.S. federal taxes other than those pertaining to U.S. federal income taxation (such as estate or gift taxes, the alternative minimum tax or the Medicare tax on investment income), nor does it address any aspects of U.S. state or local or non-U.S. taxation.

ALL HOLDERS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS REGARDING THE TAX CONSEQUENCES OF THE TRANSACTIONS AND OTHER EVENTS DESCRIBED BELOW, INCLUDING THE EFFECTS OF U.S. FEDERAL, STATE AND LOCAL AND NON-U.S. TAX LAWS.

U.S. Holders

For purposes of this summary, a “U.S. Holder” means a beneficial owner of AIR common stock that is, for U.S. federal income tax purposes:

•        an individual who is a citizen or resident of the United States;

•        a corporation (or other entity that is treated as a corporation for U.S. federal income tax purposes) organized in or under the laws of the United States, any state therein or the District of Columbia;

•        an estate the income of which is includible in gross income for U.S. federal income tax purposes regardless of its source; or

•        a trust (i) that is subject to the primary supervision of a court within the United States and all substantial decisions of which are controlled by one or more United States persons (within the meaning of Section 7701(a)(30) of the Code) or (ii) that has a valid election in effect under applicable Treasury regulations to be treated as a United States person.

If a partnership (or any entity or arrangement characterized as a partnership for U.S. federal income tax purposes) holds AIR common stock, the tax treatment of such partnership and any person treated as a partner of such partnership will generally depend on the status of the partner and the activities of the partnership. Partnerships that hold AIR common stock and persons that are treated as partners of such partnerships should consult their own tax advisors about the particular U.S. federal income tax consequences to them of the Transactions and the post-Transactions ownership and disposition of AIR common stock.

Redemption Rights

Receipt of Redemption Rights.    There is substantial uncertainty about the U.S. federal income tax treatment of the Redemption Rights. Specifically, there is no authority addressing whether the Redemption Rights should be treated as a distribution of property with respect to AIR common stock or an “open transaction”. Such determination is factual in nature. Based on the specific characteristics of the Redemption Rights, and unless otherwise required by a change in law after the date of the redemption rights agreement, we intend to take the position that a U.S. Holder’s receipt of the Redemption Rights constitutes an “open transaction” for U.S. federal income tax purposes. If our reporting position is correct, a U.S. Holder generally will not recognize income in respect of the Redemption Rights on the date of issuance and will not take tax basis in the Redemption Rights. However, the IRS could assert that the issuance of the Redemption Rights should be treated as a “closed transaction” (e.g., as the payment of a dividend or of a fee) for U.S. federal income tax purposes. U.S. Holders should consult their tax advisors about the U.S. federal income tax treatment of the Redemption Rights.

Exercise of Redemption Rights.    The redemption of a U.S. Holder’s AIR common stock that is effected by such U.S. Holder’s exercise of the Redemption Rights pursuant to the terms of the redemption rights agreement generally will be treated as a sale of such U.S. Holder’s AIR common stock. As a result, a U.S. Holder will recognize gain or loss equal to the difference between the amount of cash received by such U.S. Holder and such U.S. Holder’s tax basis in the AIR common stock redeemed. Gain or loss will be capital gain or loss and will be long-term capital gain or loss if the redeemed AIR common stock was held more than one year.

It is possible that the redemption of a U.S. Holder’s AIR common stock that is effected by such U.S. Holder’s exercise of the Redemption Rights pursuant to the terms of the redemption rights agreement will be treated as a distribution by AIR to such U.S. Holder. The full amount of cash received by the U.S. Holder for redeemed AIR common stock (without any offset for such U.S. Holder’s tax basis in the stock) will be treated as a dividend to the extent of AIR’s current and accumulated earnings and profits allocable to the distribution. A U.S. Holder’s tax basis in redeemed AIR common stock will be added to the tax basis of such U.S. Holder’s remaining AIR common stock. For non-corporate U.S. Holders, such dividends may be “qualified dividend income” that is taxed at the lower applicable capital gains rate if certain conditions, including holding period requirements, are satisfied. Any period during which a U.S. Holder owns AIR common stock and Redemption Rights will be excluded from the U.S. Holder’s holding period for purposes of determining whether a dividend is “qualified dividend income”.

To the extent cash received by a U.S. Holder exceeds such U.S. Holder’s allocable share of AIR’s current and accumulated earnings and profits, the distribution will first be treated as a non-taxable return of capital that reduces such U.S. Holder’s adjusted basis in their AIR common stock. Any amounts in excess of such U.S. Holder’s adjusted basis will be treated as capital gain. AIR will notify U.S. Holders publicly if a redemption is expected to be treated as a distribution.

U.S. Holders should consult their own tax advisors about the tax treatment of exercising their Redemption Rights.

The Merger

U.S. Holders will retain their AIR common stock in the merger. Accordingly, U.S. Holders will not recognize gain or loss for U.S. federal income tax purposes as a result of the merger, and a U.S. Holder’s holding period in their AIR common stock will remain unchanged.

Non-U.S. Holders

For purposes of this summary, a “non-U.S. Holder” means a beneficial owner of AIR common stock that is, for U.S. federal income tax purposes, neither a U.S. Holder nor an entity or arrangement classified as a partnership for U.S. federal income tax purposes.

Redemption Rights

Receipt of Redemption Rights.    As discussed above in the section entitled “— U.S. Holders — Redemption Rights — Receipt of Redemption Rights”, we intend to take the position that a non-U.S. Holder’s receipt of the Redemption Rights constitutes an “open transaction” for U.S. federal income tax purposes. If our reporting position is correct, a non-U.S. Holder generally will not recognize income in respect of the Redemption Rights on the date of issuance and will not take tax basis in the Redemption Rights. However, the IRS could assert that the issuance of the Redemption Rights should be treated as a “closed transaction” (e.g., as the payment of a dividend or of a fee) for U.S. federal income tax purposes. Non-U.S. Holders should consult their tax advisors about the U.S. federal income tax treatment of the Redemption Rights.

Exercise of Redemption Rights.    As discussed above in the section entitled “— U.S. Holders — Redemption Rights — Exercise of Redemption Rights”, the redemption of a non-U.S. Holder’s AIR common stock that is effected by such non-U.S. Holder’s exercise of the Redemption Rights pursuant to the terms of the redemption rights agreement generally will be treated as a sale of such non-U.S. Holder’s AIR common stock. As a result, a non-U.S. Holder generally will not be subject to U.S. federal income taxation as a result of the redemption unless:

(a)     such gain is effectively connected with the conduct by such non-U.S. Holder of a trade or business in the United States (and, if an income tax treaty applies, the gain is attributable to a U.S. permanent establishment maintained by such non-U.S. Holder);

(b)    in the case of gain realized by a non-U.S. Holder who is an individual, such non-U.S. Holder is present in the United States for 183 days or more in the taxable year of the redemption and certain other conditions are met; or