TDG: 10-K financial filing

tdg-20260930 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended September 30 , 2026 ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-32833 TransDigm Group Incorporated (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 41-2101738 (I.R.S. Employer Identification No.) 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) (Former name, former address and former fiscal year, if changed since last report.) 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 Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No ¨ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨ Indicate by check mark whether the registrant