UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): ~~October~~November 2312, 2025

TransDigm Group Incorporated

(Exact name of registrant as specified in its charter)

Delaware

001-32833

41-2101738

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

1350 Euclid Avenue,

Suite 1600,

Cleveland,

Ohio

44115

1350 Euclid Avenue

Suite 1600,

Cleveland,

Ohio

44115

(Address of principal executive offices)

(Zip Code)

(216) 706-2960

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class:

Trading Symbol:

Name of each exchange on which registered:

Common Stock, $0.01 par value

TDG

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company ☐

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 13(a) of the Exchange Act. ☐

Item 52.02. ~~Departure~~Results of ~~Directors~~Operations orand ~~Certain~~Financial ~~Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers~~Condition.

~~Appointment~~On November 12, 2025, TransDigm Group Incorporated (“TransDigm Group” or the “Company”) issued a press release (the “Press Release”) announcing its financial results for its fourth quarter ended September 30, 2025 and certain other information. A copy of ~~Directors~~this press release is furnished with this Current Report as Exhibit 99.1 and is incorporated herein by reference.

OnThe ~~October~~information ~~23,~~contained ~~2025,~~in this item and in the ~~Board~~accompanying exhibit shall not be incorporated by reference into any filing of ~~Directors~~the (Registrant, whether made before or after the date hereof. The information in this item, including the exhibit hereto, shall not be deemed to be “~~Board~~filed”) for purposes of ~~TransDigm~~Section ~~Group~~18 ~~Incorporated~~of (the ~~“Company”~~Securities orExchange ~~“TransDigm”)~~Act ~~appointed~~of ~~Michael~~1934, ~~Lisman~~as ~~and~~amended, ~~Peter~~or ~~Palmer~~otherwise subject to the ~~Company’s~~liabilities ~~Board~~of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, ~~effective~~as ~~immediately~~amended.

~~Mr.~~TransDigm ~~Lisman~~Group ~~currently~~will ~~serves~~host asa ~~the~~conference ~~Company’s~~call ~~President~~for investors and ~~Chief~~security ~~Executive~~analysts ~~Officer~~on November 12, 2025, beginning at 11:00 a.m., MrEastern Time. ~~Lisman~~To ~~previously~~join ~~served~~the ascall ~~Co-Chief~~telephonically, ~~Operating~~please ~~Officer~~see ofthe detailed instructions within the ~~Company,~~“Earnings ~~Chief~~Conference ~~Financial~~Call” ~~Officer~~section of the ~~Company,~~press ~~and~~release anfurnished ~~Executive~~with ~~Vice~~this ~~President~~Current Report as Exhibit 99.1. A live audio webcast of the ~~Company,~~call ~~with~~can ~~direct~~also ~~operational~~be ~~oversight~~accessed ~~for~~online ~~several~~at ~~TransDigm's~~https://www.transdigm.com. ~~operating~~A ~~units.~~slide ~~Additionally,~~presentation ~~Mr.~~will ~~Lisman~~also ~~previously~~be ~~led~~available for reference during the ~~Company's~~conference ~~Mergers~~call; go to the investor relations page of our website and ~~Acquisitions~~click ~~group~~on “Presentations.”

~~Mr.~~The ~~Palmer~~call ~~previously~~will ~~served~~be asarchived anon ~~Executive Vice President of~~ the ~~Company~~website prior to his retirement at the end of 2024, following a 24-year career at TransDigm. Prior to becoming an Executive Vice President of the Company, he served as President of several TransDigm operating units. He brings to the Board extensive operational and ~~corporate~~available ~~leadership~~for ~~experience,~~replay aslater ~~well~~that ~~as significant expertise in corporate governance and mergers and acquisitions~~day. ~~Over the course of his career, Mr. Palmer has held numerous senior roles involving operations, strategic development, and business integration, and has served on other aerospace company boards.~~

~~Neither~~Item Mr9. ~~Lisman nor Mr~~01. ~~Palmer~~Financial ~~has~~Statements ~~been~~and ~~appointed to any committees of the Board~~Exhibits.

There are no arrangements or understandings between either of the newly appointed directors and any other person pursuant to which they were selected as directors, and there are no related party transactions between either Mr. Lisman or Mr. Palmer and the Company that would be reportable under Item 404(ad) ~~of Regulation S-K.~~Exhibits

The following exhibits are being furnished with this Current Report on Form 8-K:


Exhibit No.						Description
99.1						Press Release
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TRANSDIGM GROUP INCORPORATED By: /s/ ~~Armani~~Sarah ~~Vadiee~~Wynne Name: ~~Armani~~Sarah ~~Vadiee~~Wynne Title: ~~General Counsel,~~ Chief ~~Compliance~~Financial Officer(Principal ~~and~~Financial ~~Secretary~~Officer)

Dated: ~~October~~ 23November 12, 2025

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