As filed with the Securities and Exchange Commission on July 3, 2024

Registration No. 333-   

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Triumph Group, Inc.

(Exact name of registrant as specified in its charter)

555 E Lancaster Avenue, Suite 400

Radnor, PA 19087

(610) 251-1000

(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

Jennifer H. Allen

Chief Administrative Officer, Senior Vice President, General Counsel and Secretary

555 E Lancaster Avenue, Suite 400

Radnor, PA 19087

(610) 251-1000

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

Marie L. Gibson, Esq.

Michael J. Zeidel, Esq.

Skadden, Arps, Slate, Meagher & Flom LLP

One Manhattan West

New York, New York 10001

Telephone: (212) 735-3000

Facsimile: (212) 735-2000

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, 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, please 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(c) 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. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an 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. (Check one):

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. ☐

TABLE OF CO-REGISTRANTS

Each of the following subsidiaries, and any other subsidiary of Triumph Group, Inc. that becomes a guarantor of certain of the securities registered hereby, is hereby deemed to be a registrant.

The address and telephone number of the principal executive offices for all of the subsidiaries is the same as for the Triumph Group, Inc. and the agent for service at such address is the same as for Triumph Group, Inc.

Prospectus

Triumph Group, Inc.

Common Stock

Preferred Stock

Depositary Shares

Debt Securities

Guarantees of Debt Securities

Warrants

Subscription Rights

Purchase Contracts

Units

We may offer, issue and sell, together or separately:

This registration statement may also be used by one or more selling securityholders. We will provide the specific prices and terms of these securities in one or more supplements to this prospectus at the time of offering. We will not receive any proceeds from the sale of our securities by any selling securityholder. You should read this prospectus and the accompanying prospectus supplement carefully before you make your investment decision.

This prospectus may not be used to sell securities unless accompanied by a prospectus supplement.

Investing in our securities involves a number of risks. See "Risk Factors" on page 5 before you make your investment decision.

We or any selling securityholder may offer securities through underwriting syndicates managed or co-managed by one or more underwriters or dealers, through agents or directly to purchasers. If required, the prospectus supplement for each offering of securities will describe the plan of distribution for that offering. For general information about the distribution of securities offered, please see "Plan of Distribution" in this prospectus.

Our common stock is listed on the New York Stock Exchange (the "NYSE") under the trading symbol "TGI." Each prospectus supplement will indicate whether the securities offered thereby will be listed on any securities exchange.

Neither the Securities and Exchange Commission (the "SEC") nor any state securities commission has approved or disapproved of these securities or determined if this prospectus or any accompanying prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is July 3, 2024

TABLE OF CONTENTS

ABOUT THIS PROSPECTUS

References in this prospectus to "we," "us," "our" or the "Company" mean Triumph Group, Inc. and its consolidated subsidiaries, unless the context otherwise requires.

This prospectus is part of a Registration Statement on Form S-3, or the Registration Statement, that we filed with the Securities and Exchange Commission, or SEC, using the "shelf" registration process. Under this process, we or any selling securityholders that may be named in a prospectus supplement, if required, may sell from time to time the securities described in the prospectus in one or more offerings any combination of the securities described in this prospectus.

This prospectus only provides you with a general description of the securities we may offer. Each time we or any of the selling securityholders offer securities under this prospectus, we or the selling securityholders will provide a prospectus supplement, if required, that will contain more specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. The prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update or change any of the information contained in this prospectus or in the documents that we have incorporated by reference into this prospectus. We urge you to carefully read this prospectus, any applicable prospectus supplement and any free writing prospectuses we have authorized for use in connection with a specific offering, together with the information incorporated herein by reference as described under the heading "Where You Can Find More Information."

This prospectus is neither an offer to sell nor a solicitation of an offer to buy any securities other than those registered by this prospectus, nor is it an offer to sell or a solicitation of an offer to buy securities where an offer or solicitation would be unlawful.

You should rely only on the information contained in or incorporated by reference into this prospectus or any applicable prospectus supplement. Neither we nor any selling securityholder have authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. You should assume that the information in this prospectus and any applicable prospectus supplement, and any related free writing prospectus that we prepare, as well as the information in any document incorporated or deemed to be incorporated into this prospectus and any applicable prospectus supplement, is accurate only as of the date on the front cover of the documents containing the information.

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WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Our SEC filings are available to the public at the SEC's website at www.sec.gov.

The SEC allows us to "incorporate by reference" information into this prospectus and any accompanying prospectus supplement, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus and any accompanying prospectus supplement, except for any information superseded by information contained directly in this prospectus, any subsequently filed document deemed incorporated by reference or any free writing prospectus prepared by or on behalf of us. This prospectus and any accompanying prospectus supplement incorporate by reference the documents set forth below that we have previously filed with the SEC (other than information deemed furnished and not filed in accordance with SEC rules, including Items 2.02 and 7.01 of Form 8-K).

All documents filed by us pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and before the termination of the offering also shall be deemed to be incorporated herein by reference. We are not, however, incorporating by reference any documents or portions thereof that are not deemed "filed" with the SEC, including any information furnished pursuant to Items 2.02 or 7.01 of Form 8-K.

If requested, we will provide to each person, including any beneficial owner, to whom a prospectus is delivered, a copy of any or all of the information that has been incorporated by reference in the prospectus but not delivered with the prospectus. Exhibits to the filings will not be sent, however, unless those exhibits have specifically been incorporated by reference into such documents. To obtain a copy of these filings at no cost, you may write or telephone us at the following address:

Triumph Group, Inc.

555 E Lancaster Avenue, Suite 400

Radnor, PA 19087

(610) 251-1000

Attention: Jennifer H. Allen

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the documents incorporated by reference herein contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 relating to our future operations and prospects, including statements that are based on current projections and expectations about the markets in which we operate, and our beliefs concerning future performance and capital requirements based upon current available information. Such statements are based on our beliefs as well as assumptions made by and information currently available to us. When used in this document or the documents incorporated by reference, words like "may," "might," "will," "expect," "anticipate," "plan," "believe," "potential," "estimate," and similar expressions are intended to identify forward-looking statements. Actual results could differ materially from our current expectations. For example, there can be no assurance that additional capital will not be required, and that such amounts may be material, or that additional capital, if required, will be available on reasonable terms, if at all, at such times and in such amounts as may be needed by us. In addition to these factors, among other factors that could cause actual results to differ materially, are uncertainties relating to the general economic conditions affecting our business segments; severe disruptions to the economy, the financial markets, and the markets in which we compete; dependence of certain of our businesses on certain key customers; and the risk that we will not realize all of the anticipated benefits from efforts to optimize our asset base, as well as competitive factors relating to the aerospace industry. For a more detailed discussion of these and other factors affecting us, see the risk factors described in our Annual Report on Form 10-K for the fiscal year ended March 31, 2024, filed with the SEC on May 31, 2024 and in the other reports we file with the SEC.

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THE COMPANY

The following summary is qualified in its entirety by reference to the more detailed information and consolidated financial statements appearing elsewhere or incorporated by reference in this prospectus, as well as the other materials filed with the SEC that are considered to be part of this prospectus. For a more complete understanding of our company and before making any investment decision, you should read this entire prospectus, including "Risk Factors" and the financial information and the notes thereto included and incorporated by reference herein.

General

Triumph Group, Inc. was incorporated in 1993 in Delaware. Our companies design, engineer, manufacture, repair, and overhaul a broad portfolio of aerospace and defense systems, subsystems, components, and structures. We serve the global aviation industry, including original equipment manufacturers ("OEMs") and the full spectrum of military and commercial aircraft operators through the aircraft life cycle.

Products and Services

We offer a variety of products and services to the aerospace industry through two operating segments: (i) Triumph Systems & Support, whose companies design, develop, and support proprietary components, subsystems, and systems; produce complex assemblies using external designs; and provide full life cycle solutions for commercial, regional, and military aircraft and (ii) Triumph Interiors, whose companies supply commercial, business, regional, and military manufacturers with insulation parts, interior and composite components to Triumph and customer designs, and the manufacture of thermo-acoustic insulation, environmental control system ducting, and other aircraft interior components for major aerospace OEMs. We also maintain full maintenance, repair, and overhaul capabilities for all Triumph products across Systems & Support and Interiors, including the manufacture of spare parts.

Systems & Support's capabilities include landing gear-system design; hydraulic, mechanical, and electromechanical actuation; hydraulic power generation and control; a complete suite of aerospace gearbox solutions, including engine accessory gearboxes and helicopter transmissions; active and passive thermal systems including vapor cycle systems and heat exchangers; and fuel pumps, fuel metering units, and full authority digital electronic control fuel systems.

The products and capabilities within this group include the design, manufacture, build and repair of:

Interiors products include thermo-acoustic insulation systems, environmental control system ducting, and other aircraft interior components.

Company Information

We were incorporated in Delaware in 1993. Our principal executive office is located at 555 E Lancaster Avenue, Suite 400, Radnor, PA 19087 and our telephone number is (610) 251-1000. We maintain a website at www.triumphgroup.com. The information on our website is not incorporated by reference in this prospectus and any accompanying prospectus supplement, and you should not consider it a part of this prospectus and any accompanying prospectus supplement.

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RISK FACTORS

Investing in our securities involves risk. See the risk factors described in our most recent Annual Report on Form 10-K (together with any material changes thereto contained in subsequently filed Quarterly Reports on Form 10-Q) and those contained in our other filings with the SEC that are incorporated by reference in this prospectus and any accompanying prospectus supplement. Before making an investment decision, you should carefully consider these risks as well as other information we include or incorporate by reference in this prospectus and any accompanying prospectus supplement. These risks could materially affect our business, financial condition or results of operations and cause the value of our securities to decline. You could lose all or part of your investment.

USE OF PROCEEDS

Except as otherwise set forth in any accompanying prospectus supplement, we expect to use the net proceeds from the sale of securities for general corporate purposes. We will not receive any of the proceeds from the sale of securities being offered by any selling securityholder.

DESCRIPTION OF SECURITIES

This prospectus contains summary descriptions of the common stock, preferred stock, depositary shares, debt securities, guarantees of debt securities, warrants, subscription rights, purchase contracts and units that may be offered and sold from time to time. These summary descriptions are not meant to be complete descriptions of each security. However, at the time of an offering and sale, this prospectus together with the accompanying prospectus supplement will contain the material terms of the securities being offered.

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DESCRIPTION OF CAPITAL STOCK

General

The following summary description of our capital stock is based on the provisions of the Delaware General Corporation Law (the "DGCL"), our certificate of incorporation, as amended (our "Amended and Restated Certificate of Incorporation"), and our by-laws, as amended (our "Amended and Restated By-laws"). This description does not purport to be complete and is qualified in its entirety by reference to the full text of the DGCL, as it may be amended from time to time, and to the terms of our Amended and Restated Certificate of Incorporation and Amended and Restated By-laws, as each may be amended from time to time, which are incorporated by reference as exhibits to the registration statement of which this prospectus is a part. See "Where You Can Find More Information." As used in this "Description of Capital Stock," the terms "Triumph," the "Company", "we," "our" and "us" refer to Triumph Group, Inc., a Delaware corporation, and do not, unless otherwise specified, include our subsidiaries.

Our authorized capital stock consists of 200,000,000 shares of common stock, par value $0.001 per share, and 250,000 shares of preferred stock, par value $0.01 per share (the "Preferred Stock"). The number of authorized shares of any class may be increased or decreased by an amendment to our Amended and Restated Certificate of Incorporation proposed by our board of directors and approved by a majority of voting shares voted on the issue at a meeting at which a quorum exists.

Each shareholder of record of our common stock is entitled to one vote for each share held on every matter properly submitted to the shareholders for their vote. As and when dividends are declared or paid thereon, holders of common stock are entitled to participate in such dividends ratably on a per share basis.

Common Stock

Upon our liquidation, dissolution or winding up, the holders of our common stock are entitled to receive ratably our net assets available, if any, after the payment of all debts and other liabilities and subject to the prior rights of any outstanding Preferred Stock.

Holders of our common stock have no preemptive, subscription, redemption, conversion or exchange rights and no sinking fund provisions.

The rights, preferences and privileges of holders of common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of Preferred Stock that we may designate and issue in the future.

Preferred Stock

Our Amended and Restated Certificate of Incorporation authorizes us to issue 250,000 shares of Preferred Stock, par value $0.01 per share. The Preferred Stock is issuable in series with such voting rights, if any, designations, powers, preferences and other rights and such qualifications, limitations and restrictions as may be determined by our board of directors. Our board of directors is authorized, subject to limitations prescribed by law and our Amended and Restated Certificate of Incorporation, to provide for the issuance of the shares of Preferred Stock and to establish from time to time the number of shares to be included in each such series, and to fix the designations, powers, preferences and rights of the shares of each such series and the qualifications, limitations or restrictions thereof. As of the date of this prospectus, no shares of our Preferred Stock were outstanding.

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Anti-Takeover Effects of Provisions of the Amended and Restated Certificate of Incorporation, Amended and Restated By-laws and Other Agreements

Our Amended and Restated By-laws contain certain provisions that may be deemed to have an anti-takeover effect and may delay, deter or prevent a tender offer or takeover attempt that a stockholder might consider in its best interest.

Our Amended and Restated By-laws provide that special meetings of the stockholders, for any purpose or purposes may be called by the Chairman or the President and shall be called by the Chairman or the President or Secretary at the request in writing of a majority of our board of directors, or at the request in writing in compliance with our Amended and Restated By-laws of stockholders of record owning at least 25% in amount of the entire capital stock of the Company issued and outstanding and entitled to vote.

Our Amended and Restated By-laws establish an advance notice procedure for the nomination, other than by or at the direction of our board of directors, of candidates for election as directors as well as for other stockholder proposals to be considered at annual meetings or special meetings of stockholders. In general, notice of intent to nominate a director or raise business at such meetings must be received by us not less than 90 nor more than 120 days prior the first anniversary of the preceding year's annual meeting (in the case of an annual meeting) or prior to the date of the special meeting (in the case of a special meeting). The notice must contain certain specified information concerning the person to be nominated or the matters to be brought before the meeting and concerning the stockholder submitting the proposal.

Shareholder Rights Plan

We have a shareholder rights plan, which we refer to as our Rights Plan. Under our Tax Benefits Preservation Plan (the "Rights Plan"), if any person or group acquires beneficial ownership of 4.9% or more of our then-outstanding common stock, shareholders other than the 4.9% triggering shareholder will have the right to purchase a unit consisting of one one-thousandth of a share of Series B Junior Participating Preferred Stock, par value $0.01 per share (the "Series B Preferred Stock"), at a purchase price of $100.00 per share, subject to adjustment. The Rights Plan is intended to help protect certain Company tax attributes, such as current year net operating loss and the net operating loss carryovers, capital loss carryovers, general business credit carryovers, alternative minimum tax credit carryovers, foreign tax credit carryovers and other similar tax carryovers, as well as any loss or deduction attributable to a "net unrealized built-in loss" within the meaning of Section 382 of the Internal Revenue Code of 1986, as amended, and the Treasury regulations promulgated thereunder, of the Company or any of its subsidiaries (collectively, "Tax Benefits") by deterring any person from becoming a 4.9% Shareholder (as defined in the Rights Plan).

Rights Certificates; Exercise Period

Initially, the Rights will be attached to all common stock certificates representing shares then outstanding, and no separate rights certificates ("Rights Certificates") will be distributed. Subject to certain exceptions specified in the Rights Plan, the Rights will separate from the common stock and a distribution date (the "Distribution Date") will occur upon the earlier of (i) ten (10) business days following a public announcement that an Acquiring Person (as defined in the Rights Plan) has become a 4.9% Shareholder (the "Stock Acquisition Date") and (ii) ten (10) business days (or such later date as our board of directors shall determine) following the commencement of a tender offer or exchange offer that would result in a person or group becoming an Acquiring Person.

Until the Distribution Date, (i) the Rights will be evidenced by the common stock certificates (or, in the case of book entry shares, by the notations in the book entry accounts) and will be transferred with and only with such common stock, (ii) new common stock certificates issued after the Record Date will contain a notation incorporating the Rights Plan by reference and (iii) the surrender for transfer of any certificates for common stock outstanding will also constitute the transfer of the Rights associated with the common stock represented by

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such certificates. Pursuant to the Rights Plan, the Company reserves the right to require prior to the occurrence of a Triggering Event (as described below) that, upon any exercise of Rights, a number of Rights be exercised so that only whole shares of Series B Preferred Stock will be issued.

The definition of "Acquiring Person" contained in the Rights Plan contains several exemptions, including for (i) the Company; (ii) any of the Company's subsidiaries; (iii) any employee benefit plan of the Company, or of any subsidiary of the Company, or any person organized, appointed or established by the Company for or pursuant to the terms of any such plan; (iv) any person that becomes a 4.9% Shareholder as a result of a reduction in the number of shares of Company securities outstanding due to a repurchase of Company securities by the Company or a stock dividend, stock split, reverse stock split or similar transaction, unless and until such person increases its ownership by more than one (1) percentage point over such person's lowest percentage stock ownership on or after the consummation of the relevant transaction; (v) any person who, together with all affiliates and associates of such person, was a 4.9% Shareholder on the date of the Rights Plan (as disclosed in public filings with the SEC on the date of the Rights Plan), unless and until such person and its affiliates and associates increase their aggregate ownership by more than one (1) percentage point over their lowest percentage stock ownership on or after the date of the Rights Plan, provided that this clause (v) will not apply to any such person who has decreased its ownership below 4.9%; (vi) any person who, within ten (10) business days of being requested by the Company to do so, certifies to the Company that such person became an Acquiring Person inadvertently or without knowledge of the terms of the Rights and who, together with all affiliates and associates, thereafter within ten (10) business days following such certification disposes of such number of shares of common stock so that it, together with all affiliates and associates, ceases to be an Acquiring Person; and (vii) any person that our board of directors has affirmatively determined in its sole discretion shall not be deemed an Acquiring Person.

Certain synthetic interests in securities created by derivative positions, whether or not such interests are considered to be ownership of the underlying common stock or are reportable for purposes of Regulation 13D of the Exchange Act are treated as beneficial ownership of the number of shares of common stock equivalent to the economic exposure created by the derivative position, to the extent actual shares of common stock are directly or indirectly held by counterparties to the derivatives contracts.

The Rights are not exercisable until the Distribution Date and will expire at the earliest of (i) 5:00 P.M., New York City time, on March 13, 2025 (ii) the time at which the Rights are redeemed or exchanged as provided in the Rights Plan, (iii) the time at which our board of directors determines that the Rights Plan is no longer necessary or desirable for the preservation of Tax Benefits, and (iv) the close of business on the first day of a taxable year of the Company to which our board of directors determines that no Tax Benefits, once realized, as applicable, may be carried forward.

As soon as practicable after the Distribution Date, Rights Certificates will be mailed to holders of record of the common stock as of the close of business on the Distribution Date and, thereafter, the separate Rights Certificates alone will represent the Rights. After the Distribution Date, the Company generally would issue Rights with respect to shares of common stock issued upon the exercise of stock options or pursuant to awards under any employee plan or arrangement, which stock options or awards are outstanding as of the Distribution Date, or upon the exercise, conversion or exchange of securities issued by the Company after the Rights Plan's adoption (except as may otherwise be provided in the instruments governing such securities). In the case of other issuances of shares of common stock after the Distribution Date, the Company generally may, if deemed necessary or appropriate by our board of directors, issue Rights with respect to such shares of common stock.

Preferred Share Provisions

Each one one-thousandth of a share of Series B Preferred Stock, if issued:

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Flip-in Trigger

In the event that a person or group of affiliated or associated persons becomes an Acquiring Person (unless the event causing such person or group to become an Acquiring Person is a transaction described under "Flip-over Trigger," below), each holder of a Right will thereafter have the right to receive, upon exercise, common stock (or, in certain circumstances, cash, property or other securities of the Company) having a value equal to two times the exercise price of the Right. Notwithstanding the foregoing, following the occurrence of such an event, all Rights that are, or (under certain circumstances specified in the Rights Plan) were, beneficially owned by any Acquiring Person will be null and void. However, Rights are not exercisable following the occurrence of such an event until such time as the Rights are no longer redeemable by the Company as set forth below.

Flip-over Trigger

In the event that, at any time following the Stock Acquisition Date, (i) the Company engages in a merger or other business combination transaction in which the Company is not the surviving corporation, (ii) the Company engages in a merger or other business combination transaction in which the Company is the surviving corporation and the common stock is changed or exchanged, or (iii) more than fifty percent (50%) of the Company's assets, cash flow or earning power is sold or transferred, each holder of a Right (except Rights that have previously been voided as set forth above) shall thereafter have the right to receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the Right.

Exchange Feature

At any time after a person becomes an Acquiring Person and prior to the acquisition by such person or group of fifty percent (50%) or more of the outstanding common stock, our board of directors may exchange the Rights (other than Rights owned by such person or group which have become void), in whole or in part, at an exchange ratio of one (1) share of common stock, or one one-thousandth of a share of Series B Preferred Stock (or of a share of a class or series of the Company's preferred stock having equivalent rights, preferences and privileges), per Right (subject to adjustment).

Equitable Adjustments

The purchase price payable, and the number of Units of Series B Preferred Stock or other securities or property issuable, upon exercise of the Rights are subject to adjustment from time to time to prevent dilution (i) in the event of a stock dividend on, or a subdivision, combination or reclassification of the Series B Preferred Stock, (ii) if holders of the Series B Preferred Stock are granted certain rights or warrants to subscribe for Series B Preferred Stock or convertible securities at less than the current market price of the Series B Preferred Stock, or (iii) upon the distribution to holders of the Series B Preferred Stock of evidences of indebtedness or assets (excluding regular quarterly cash dividends) or of subscription rights or warrants (other than those referred to above).

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With certain exceptions, no adjustment in the purchase price will be required until cumulative adjustments amount to at least one percent (1%) of the purchase price. No fractional Units will be issued and, in lieu thereof, an adjustment in cash will be made based on the market price of the Series B Preferred Stock on the last trading day prior to the date of exercise.

Redemption Rights

At any time until ten (10) business days following the Stock Acquisition Date, the Company may, at its option, redeem the Rights in whole, but not in part, at a price of $0.001 per Right (payable in cash, common stock or other consideration deemed appropriate by our board of directors). Immediately upon the action of our board of directors ordering redemption of the Rights, the Rights will terminate and the only right of the holders of Rights will be to receive the $0.001 redemption price.

Amendment of Rights

Any of the provisions of the Rights Plan may be amended by our board of directors prior to the Distribution Date. After the Distribution Date, the provisions of the Rights Plan may be amended by our board of directors in order to cure any ambiguity, to make changes that do not adversely affect the interests of holders of Rights, or to shorten or lengthen any time period under the Rights Plan. The foregoing notwithstanding, no amendment may be made at such time as the Rights are not redeemable, except to cure any ambiguity or correct or supplement any provision contained in the Rights Plan which may be defective or inconsistent with any other provision therein.

Miscellaneous

Until a Right is exercised, the holder thereof, as such, will have no separate rights as a shareholder of the Company, including the right to vote or to receive dividends in respect of the Rights. While the distribution of the Rights will not be taxable to stockholders or to the Company, shareholders may, depending upon the circumstances, recognize taxable income in the event that the Rights become exercisable for common stock (or other consideration) of the Company or for common stock of the acquiring company or in the event of the redemption of the Rights as set forth above.

This summary description of the Rights and the Rights Plan does not purport to be complete and is qualified in its entirety by reference to the Rights Plan.

Listing

Our common stock is listed on the NYSE under the symbol "TGI."

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Computershare Trust Company, N.A.

Dividend Policy

During fiscal 2024 and 2023, we made no declaration or payments of dividends due to the March 2020 suspension of our dividend program. This suspension is still in place. Our declaration and payment of cash dividends in the future and the amount thereof will depend upon our results of operations, financial condition, cash requirements, future prospects, limitations imposed by credit agreements or indentures governing debt securities and other factors deemed relevant by our Board of Directors. No assurance can be given that cash dividends will be declared and paid at historical levels or at all. Certain of our debt arrangements restrict our paying dividends and making distributions on our capital stock, except for the payment of stock dividends and redemptions of an employee's shares of capital stock upon termination of employment. We currently have an accumulated deficit which could limit or restrict our ability to pay dividends in the future.

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DESCRIPTION OF DEPOSITARY SHARES

We may offer depositary receipts representing fractional shares of our preferred stock, rather than full shares of preferred stock. The shares of preferred stock represented by depositary shares will be deposited under a depositary agreement between us and a bank or trust company that meets certain requirements and is selected by us (the "Bank Depositary"). Each owner of a depositary share will be entitled to all the rights and preferences of the preferred stock represented by the depositary share.

The description in an accompanying prospectus supplement of any depositary shares we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable depositary agreement, which will be filed with the SEC if we offer depositary shares. For more information on how you can obtain copies of any depositary agreement if we offer depositary shares, see "Where You Can Find More Information." We urge you to read the applicable depositary agreement and any accompanying prospectus supplement in their entirety.

Dividends and Other Distributions

If we pay a cash distribution or dividend on a series of preferred stock represented by depositary shares, the Bank Depositary will distribute such dividends to the record holders of such depositary shares. If the distributions are in property other than cash, the Bank Depositary will distribute the property to the record holders of the depositary shares. However, if the Bank Depositary determines that it is not feasible to make the distribution of property, the Bank Depositary may, with our approval, sell such property and distribute the net proceeds from such sale to the record holders of the depositary shares.

Redemption of Depositary Shares

If we redeem a series of preferred stock represented by depositary shares, the Bank Depositary will redeem the depositary shares from the proceeds received by the Bank Depositary in connection with the redemption. The redemption price per depositary share will equal the applicable fraction of the redemption price per share of the preferred stock. If fewer than all the depositary shares are redeemed, the depositary shares to be redeemed will be selected by lot or pro rata as the Bank Depositary may determine.

Voting the Preferred Stock

Upon receipt of notice of any meeting at which the holders of the preferred stock represented by depositary shares are entitled to vote, the Bank Depositary will mail the notice to the record holders of the depositary shares relating to such preferred stock. Each record holder of these depositary shares on the record date, which will be the same date as the record date for the preferred stock, may instruct the Bank Depositary as to how to vote the preferred stock represented by such holder's depositary shares. The Bank Depositary will endeavor, insofar as practicable, to vote the amount of the preferred stock represented by such depositary shares in accordance with such instructions, and we will take all action that the Bank Depositary deems necessary in order to enable the Bank Depositary to do so. The Bank Depositary will abstain from voting shares of the preferred stock to the extent it does not receive specific instructions from the holders of depositary shares representing such preferred stock.

Amendment and Termination of the Depositary Agreement

The form of depositary receipt evidencing the depositary shares and any provision of the depositary agreement may be amended by agreement between the Bank Depositary and us. However, any amendment that materially and adversely alters the rights of the holders of depositary shares will not be effective unless such amendment has been approved by the holders of at least a majority of the depositary shares then outstanding. The depositary agreement may be terminated by the Bank Depositary or us only if (1) all outstanding depositary

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shares have been redeemed or (2) there has been a final distribution in respect of the preferred stock in connection with any liquidation, dissolution or winding up of our company and such distribution has been distributed to the holders of depositary receipts.

Withdrawal of Preferred Stock

Except as may be provided otherwise in an accompanying prospectus supplement, upon surrender of depositary receipts at the principal office of the Bank Depositary, subject to the terms of the depositary agreement, the owner of the depositary shares may demand delivery of the number of whole shares of preferred stock and all money and other property, if any, represented by those depositary shares. Partial shares of preferred stock will not be issued. If the depositary receipts delivered by the holder evidence a number of depositary shares in excess of the number of depositary shares representing the number of whole shares of preferred stock to be withdrawn, the Bank Depositary will deliver to such holder at the same time a new depositary receipt evidencing the excess number of depositary shares. Holders of withdrawn preferred stock may not thereafter deposit those shares under the depositary agreement or receive depositary receipts evidencing depositary shares therefor.

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DESCRIPTION OF DEBT SECURITIES AND GUARANTEES

We may offer debt securities in one or more series, which may be senior debt securities or subordinated debt securities and which may be convertible into another security. The following description briefly sets forth certain general terms and provisions of the debt securities. The particular terms of the debt securities offered by any prospectus supplement and the extent, if any, to which the following general terms and provisions may apply to the debt securities, will be described in an accompanying prospectus supplement. Unless otherwise specified in an accompanying prospectus supplement, our debt securities will be issued in one or more series under an indenture to be entered into between us and U.S. Bank National Association, as trustee, or such other trustee named therein. A form of the indenture is attached as an exhibit to the registration statement of which this prospectus forms a part, which you should review for additional information. The terms of the debt securities and any guarantees will include those set forth in the indenture and those made a part of the indenture by the Trust Indenture Act of 1939 ("TIA"). You should read the summary below, any accompanying prospectus supplement and the provisions of the indenture in their entirety before investing in our debt securities.

The aggregate principal amount of debt securities that may be issued under the indenture is unlimited. The prospectus supplement relating to any series of debt securities that we may offer will contain the specific terms of the debt securities and guarantees. These terms may include, among others, the following:

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General

We may sell the debt securities, including original issue discount securities, at par or at a substantial discount below their stated principal amount. Unless we inform you otherwise in a prospectus supplement, we may issue additional debt securities of a particular series without the consent of the holders of the debt securities of such series or any other series outstanding at the time of issuance. Any such additional debt securities, together with all other outstanding debt securities of that series, will constitute a single series of securities under the indenture.

We will describe in an accompanying prospectus supplement any other special considerations for any debt securities and guarantees we sell that are denominated in a currency or currency unit other than U.S. dollars. In addition, debt securities may be issued where the amount of principal and/or interest payable is determined by reference to one or more currency exchange rates, commodity prices, equity indices or other factors. Holders of such securities may receive a principal amount or a payment of interest that is greater than or less than the amount of principal or interest otherwise payable on such dates, depending upon the value of the applicable currencies, commodities, equity indices or other factors. Information as to the methods for determining the amount of principal or interest, if any, payable on any date, and the currencies, commodities, equity indices or other factors to which the amount payable on such date is linked will be described in an accompanying prospectus supplement.

United States federal income tax consequences and special considerations, if any, applicable to any such series will be described in an accompanying prospectus supplement.

We expect most debt securities to be issued in fully registered form without coupons and in minimum denominations of $2,000 and any integral multiple of $1,000 in excess thereof. Subject to the limitations provided in the indenture and in an accompanying prospectus supplement, debt securities that are issued in registered form may be transferred or exchanged at the designated corporate trust office of the trustee, without the payment of any service charge, other than any tax or other governmental charge payable in connection therewith.

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Global Securities

Unless we inform you otherwise in an accompanying prospectus supplement, the debt securities of a series may be issued in whole or in part in the form of one or more global securities that will be deposited with, or on behalf of, a depositary identified in an accompanying prospectus supplement. Unless and until a global security is exchanged in whole or in part for the individual debt securities, a global security may not be transferred except as a whole by the depositary for such global security to a nominee of such depositary or by a nominee of such depositary to such depositary or another nominee of such depositary or by such depositary or any such nominee to a successor of such depositary or a nominee of such successor.

Governing Law

The indenture and the debt securities shall be construed in accordance with and governed by the laws of the State of New York.

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DESCRIPTION OF WARRANTS

We may issue warrants for the purchase of shares of our common stock, shares of preferred stock or our debt securities. We may issue warrants independently or together with other securities, and they may be attached to or separate from the other securities. Each series of warrants will be issued under a separate warrant agreement that we will enter into with a bank or trust company, as warrant agent, as detailed in an accompanying prospectus supplement. The warrant agent will act solely as our agent in connection with the warrants and will not assume any obligation, or agency or trust relationship, with you.

The prospectus supplement relating to a particular issue of warrants will describe the terms of those warrants, including, when applicable:

After warrants expire they will become void. The prospectus supplement may provide for the adjustment of the exercise price of the warrants.

Warrants may be exercised at the appropriate office of the warrant agent or any other office indicated in an accompanying prospectus supplement. Before the exercise of warrants, holders will not have any of the rights of holders of the securities purchasable upon exercise and will not be entitled to payments made to holders of those securities.

The description in an accompanying prospectus supplement of any warrants we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable warrant agreement, which will be filed with the SEC if we offer warrants. For more information on how you can obtain copies of any warrant agreement if we offer warrants, see "Where You Can Find More Information." We urge you to read the applicable warrant agreement and any accompanying prospectus supplement in their entirety.

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DESCRIPTION OF SUBSCRIPTION RIGHTS

We may issue subscription rights to purchase shares of our common stock, shares of our preferred stock or our debt securities. We may issue subscription rights independently or together with any other offered security, which may or may not be transferable by the stockholder. In connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other purchasers pursuant to which the underwriters or other purchasers may be required to purchase any securities remaining unsubscribed for after such offering.

The prospectus supplement relating to any subscription rights we may offer will contain the specific terms of the subscription rights. These terms may include the following:

The description in an accompanying prospectus supplement of any subscription rights we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable subscription rights certificate or subscription rights agreement, which will be filed with the SEC if we offer subscription rights. For more information on how you can obtain copies of any subscription rights certificate or subscription rights agreement if we offer subscription rights, see "Where You Can Find More Information." We urge you to read the applicable subscription rights certificate, the applicable subscription rights agreement and any accompanying prospectus supplement in their entirety.

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DESCRIPTION OF PURCHASE CONTRACTS AND PURCHASE UNITS

We may issue purchase contracts, including contracts obligating holders to purchase from us, and obligating us to sell to the holders, a specified number of shares of our common stock, shares of our preferred stock or our debt securities at a future date or dates, which we refer to in this prospectus as purchase contracts. The price of the securities and the number of securities may be fixed at the time the purchase contracts are issued or may be determined by reference to a specific formula set forth in the purchase contracts, and may be subject to adjustment under anti-dilution formulas. The purchase contracts may be issued separately or as part of units consisting of a stock purchase contract and our debt securities or preferred securities or debt obligations of third parties, including U.S. treasury securities, or any combination of the foregoing, securing the holders' obligations to purchase the securities under the purchase contracts, which we refer to herein as purchase units. The purchase contracts may require holders to secure their obligations under the purchase contracts in a specified manner. The purchase contracts also may require us to make periodic payments to the holders of the purchase contracts or the purchase units, as the case may be, or vice versa, and those payments may be unsecured or pre-funded in whole or in part.

The description in an accompanying prospectus supplement of any purchase contract or purchase unit we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable purchase contract or purchase unit, which will be filed with the SEC if we offer purchase contracts or purchase units. For more information on how you can obtain copies of any purchase contract or purchase unit we may offer, see "Where You Can Find More Information." We urge you to read the applicable purchase contract or applicable purchase unit and any accompanying prospectus supplement in their entirety.

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PLAN OF DISTRIBUTION

We or the selling securityholders may sell the securities being offered hereby in one or more of the following ways from time to time:

In addition, we or the selling securityholders may enter into derivative or hedging transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. In connection with such a transaction, the third parties may sell securities covered by and pursuant to this prospectus and any accompanying prospectus supplement. If so, the third party may use securities borrowed from us or others to settle such sales and may use securities received from us to close out any related short positions. We or the selling securityholders may also loan or pledge securities covered by this prospectus and any accompanying prospectus supplement to third parties, who may sell the loaned securities or, in an event of default in the case of a pledge, sell the pledged securities pursuant to this prospectus and any accompanying prospectus supplement.

We or the selling securityholders will identify the specific plan of distribution in a prospectus supplement, including:

Underwriters, dealers and agents

If we or the selling securityholders use underwriters in an offering, we or the selling securityholders will execute an underwriting agreement with such underwriters and will specify the name of each underwriter and the terms of the transaction (including any underwriting discounts and other terms constituting compensation of the underwriters and any dealers) in a prospectus supplement. If we or the selling securityholders use an underwriting syndicate, the managing underwriter(s) will be specified on the cover of the prospectus supplement. If we or the selling securityholders use underwriters for a sale of securities, the underwriters will acquire the securities for their own accounts. The underwriters may resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Any public offering price and any discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time. Unless otherwise set forth in the prospectus supplement, the obligations of the underwriters to purchase the offered securities will be subject to conditions precedent and the underwriters will be obligated to purchase all of the offered securities if any are purchased.

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If dealers are used in an offering, we or the selling securityholders may sell the securities to the dealers as principals. The dealers then may resell the securities to the public at varying prices which they determine at the time of resale. The names of the dealers and the terms of the transaction will be specified in a prospectus supplement.

If agents are used in an offering, the names of the agents and the terms of the agency will be specified in a prospectus supplement. Unless otherwise indicated in a prospectus supplement, the agents will act on a best-efforts basis for the period of their appointment.

Dealers and agents named in a prospectus supplement may be underwriters as defined in the Securities Act and any discounts or commissions they receive from us and any profit on their resale of the securities may be treated as underwriting discounts and commissions under the Securities Act. We or the selling securityholders will identify in the applicable prospectus supplement any underwriters, dealers or agents and will describe their compensation. We or the selling securityholders may have agreements with the underwriters, dealers and agents to indemnify them against specified civil liabilities, including liabilities under the Securities Act.

Underwriters, dealers or agents and their associates may engage in other transactions with and perform other services for us or the selling securityholders in the ordinary course of business.

If so indicated in a prospectus supplement, we or the selling securityholders will authorize underwriters or other persons acting as our agents to solicit offers by institutional investors to purchase securities pursuant to contracts providing for payment and delivery on a future date. We or the selling securityholders may enter contracts with commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutional investors. The obligations of any institutional investor will be subject to the condition that its purchase of the offered securities will not be illegal at the time of delivery. The underwriters and other agents will not be responsible for the validity or performance of contracts.

Direct sales

We or the selling securityholders may sell securities directly to one or more purchasers without using underwriters or agents.

At-the-market offerings

We or the selling securityholders may also sell the securities offered by any applicable prospectus supplement in "at-the-market offerings" within the meaning of Rule 415 of the Securities Act, to or through a market maker or into an existing trading market, on an exchange or otherwise.

Trading markets and listing of securities

Unless otherwise specified in the applicable prospectus supplement, each class or series of securities will be a new issue with no established trading market, other than our common stock, which are listed on the NYSE. We may elect to list any other class or series of securities on any exchange, but we are not obligated to do so. It is possible that one or more underwriters may make a market in a class or series of securities, but the underwriters will not be obligated to do so and may discontinue any market making at any time without notice. We cannot give any assurance as to the liquidity of the trading market for any of the securities.

Stabilization activities

In connection with an offering, an underwriter may purchase and sell securities in the open market. These transactions may include short sales, stabilizing transactions and purchases to cover positions created by short sales.

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Short sales involve the sale by the underwriters of a greater number of securities than they are required to purchase in the offering. "Covered" short sales are sales made in an amount not greater than the underwriters' option to purchase additional securities, if any, from us in the offering. If the underwriters have an over-allotment option to purchase additional securities from us, the underwriters may close out any covered short position by either exercising their over-allotment option or purchasing securities in the open market. In determining the source of securities to close out the covered short position, the underwriters may consider, among other things, the price of securities available for purchase in the open market as compared to the price at which they may purchase securities through the over-allotment option. "Naked" short sales are any sales in excess of such option or where the underwriters do not have an over-allotment option. The underwriters must close out any naked short position by purchasing securities in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the securities in the open market after pricing that could adversely affect investors who purchase in the offering.

Accordingly, to cover these short sales positions or to otherwise stabilize or maintain the price of the securities, the underwriters may bid for or purchase securities in the open market and may impose penalty bids. If penalty bids are imposed, selling concessions allowed to syndicate members or other broker-dealers participating in the offering are reclaimed if securities previously distributed in the offering are repurchased, whether in connection with stabilization transactions or otherwise. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. The impositions of a penalty bid may also affect the price of the securities to the extent that it discourages resale of the securities. The magnitude or effect of any stabilization or other transactions is uncertain. These transactions may be effected on the NYSE or otherwise and, if commenced, may be discontinued at any time.

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LEGAL MATTERS

Unless otherwise indicated in any accompanying prospectus supplement, Skadden, Arps, Slate, Meagher & Flom LLP will provide opinions regarding the authorization and validity of the securities. Skadden, Arps, Slate, Meagher & Flom LLP may also provide opinions regarding certain other matters. Any underwriters will be advised about legal matters by their own counsel, which will be named in an accompanying prospectus supplement.

EXPERTS

Ernst & Young LLP, independent registered public accounting firm, has audited our consolidated financial statements included in our Annual Report on Form 10-K for the year ended March 31, 2024, and the effectiveness of our internal control over financial reporting as of March 31, 2024, as set forth in their reports, which are incorporated by reference in this prospectus and elsewhere in this registration statement. Our financial statements are incorporated by reference in reliance on Ernst & Young LLP's reports, given on their authority as experts in accounting and auditing.

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PART II INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The expenses relating to the registration of the securities will be borne by the registrant.

Item 15. Indemnification of Directors and Officers.

Reference is also made to Section 145 of the DGCL, which provides that a corporation may indemnify any persons, including officers and directors, who are, or are threatened to be made, parties to any threatened, pending or completed legal action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of such corporation), by reason of the fact that such person is or was a director, officer, employee or agent of such corporation or is or was serving at the request of such corporation as a director, officer, employee or agent of another corporation or enterprise. The indemnity may include expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding, provided such director, officer, employee or agent acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe that the person's conduct was unlawful. A Delaware corporation may indemnify officers and directors in an action by or in the right of the corporation under the same conditions, except that no indemnification is permitted without judicial approval if the officer or director is adjudged to be liable to the corporation. Where an officer or director

is successful on the merits or otherwise in the defense of any action referred to above, the corporation must indemnify him or her against the expenses that such officer or director actually and reasonably incurred. The indemnification permitted under the DGCL is not exclusive, and a corporation is empowered to purchase and maintain insurance against liabilities whether or not indemnification would be permitted by statute.

The registrant's Amended and Restated Certificate of Incorporation and Amended and Restated By-laws provide for indemnification of its directors and officers to the fullest extent currently permitted by the DGCL.

The registrant also has indemnification agreements with its directors and officers. In addition, the registrant maintains liability insurance for its directors and officers.

Item 16. List of Exhibits.

The Exhibits to this registration statement are listed in the Exhibit Index below.

Item 17. Undertakings.

The undersigned registrant hereby undertakes:

provided, however, that paragraphs (i), (ii) and (iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement;

The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

SIGNATURES

Pursuant to the requirements of the Securities Act, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Radnor, Commonwealth of Pennsylvania on July 3, 2024.

In accordance with the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates stated. Each person whose signature appears below constitutes and appoints Jennifer H. Allen and James F. McCabe, Jr. and each of them severally, as his or her true and lawful attorney-in-fact and agent, each acting along with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) and exhibits to the Registration Statement on Form S-3, and to any registration statement filed under SEC Rule 462, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this registration statement on Form S-3 has been signed by the following persons in the capacities indicated below.

SIGNATURES

Pursuant to the requirements of the Securities Act, the co-registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Radnor, Commonwealth of Pennsylvania on July 3, 2024.

HT PARTS, L.L.C.

NU-TECH BRANDS, INC.

THE TRIUMPH GROUP OPERATIONS, INC.

TRIUMPH ACTUATION SYSTEMS - CONNECTICUT, LLC

TRIUMPH ACTUATION SYSTEMS - VALENCIA, INC.

TRIUMPH ACTUATION SYSTEMS - YAKIMA, LLC

TRIUMPH ACTUATION SYSTEMS, LLC

TRIUMPH AEROSPACE SYSTEMS GROUP, LLC

TRIUMPH AEROSTRUCTURES - TULSA, LLC

TRIUMPH AEROSTRUCTURES HOLDINGS, LLC

TRIUMPH AEROSTRUCTURES, LLC

TRIUMPH AFTERMARKET SERVICES GROUP, LLC

TRIUMPH AVIATIONS INC.

TRIUMPH BRANDS, INC.

TRIUMPH COMPOSITE SYSTEMS, INC.

TRIUMPH CONTROLS, LLC

TRIUMPH ENGINE CONTROL HOLDINGS, INC.

TRIUMPH ENGINE CONTROL SYSTEMS, LLC

TRIUMPH ENGINEERED SOLUTIONS, INC.

TRIUMPH ENGINEERING SERVICES, INC.

TRIUMPH FABRICATIONS - ORANGEBURG, INC.

TRIUMPH GEAR SYSTEMS - MACOMB, INC.

TRIUMPH GEAR SYSTEMS, INC.

TRIUMPH GROUP ACQUISITION CORP.

TRIUMPH INSTRUMENTS - BURBANK, INC.

TRIUMPH INTEGRATED AIRCRAFT INTERIORS, INC.

TRIUMPH INVESTMENT HOLDINGS, INC.

TRIUMPH STRUCTURES - KANSAS CITY, INC.

TRIUMPH STRUCTURES - WICHITA, INC.

TRIUMPH THERMAL SYSTEMS - MARYLAND, INC.

TRIUMPH THERMAL SYSTEMS, LLC

TRIUMPH TURBINE SERVICES, INC.

VAC INDUSTRIES, INC.

In accordance with the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates stated. Each person whose signature appears below constitutes and appoints Jennifer H. Allen and James F. McCabe, Jr. and each of them severally, as his or her true and lawful attorney-in-fact and agent, each acting along with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) and exhibits to the Registration Statement on Form S-3, and to any registration statement filed under SEC Rule 462, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this registration statement on Form S-3 has been signed by the following persons in the capacities indicated below.

SIGNATURES

Pursuant to the requirements of the Securities Act, the co-registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Radnor, Commonwealth of Pennsylvania on July 3, 2024.

In accordance with the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates stated. Each person whose signature appears below constitutes and appoints Jennifer H. Allen and James F. McCabe, Jr. and each of them severally, as his or her true and lawful attorney-in-fact and agent, each acting along with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) and exhibits to the Registration Statement on Form S-3, and to any registration statement filed under SEC Rule 462, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this registration statement on Form S-3 has been signed by the following persons in the capacities indicated below.

SIGNATURES

Pursuant to the requirements of the Securities Act, the co-registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Radnor, Commonwealth of Pennsylvania on July 3, 2024.

In accordance with the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates stated. Each person whose signature appears below constitutes and appoints Jennifer H. Allen and James F. McCabe, Jr. and each of them severally, as his or her true and lawful attorney-in-fact and agent, each acting along with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) and exhibits to the Registration Statement on Form S-3, and to any registration statement filed under SEC Rule 462, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this registration statement on Form S-3 has been signed by the following persons in the capacities indicated below.