Kevin M. Stein - 08 Jan 2026 Form 4 Insider Report for TransDigm Group INC (TDG)

Role
Director
Signature
/s/ Rachel Quinlan as attorney in fact for Kevin Stein
Issuer symbol
TDG
Transactions as of
08 Jan 2026
Net transactions value
-$18,501,154
Form type
4
Filing time
09 Jan 2026, 16:25:39 UTC
Previous filing
06 Jan 2026
Next filing
16 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Stein Kevin M Director 1350 EUCLID AVE, SUITE 1600, CLEVELAND /s/ Rachel Quinlan as attorney in fact for Kevin Stein 09 Jan 2026 0001431675

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TDG Common Stock Options Exercise $5,946,952 +17,373 +213% $342.31 25,531 08 Jan 2026 Fortuna Trust dated June 1, 2018 F1
transaction TDG Common Stock Sale $8,971,439 -6,384 -25% $1405.30 19,147 08 Jan 2026 Fortuna Trust dated June 1, 2018 F2
transaction TDG Common Stock Sale $1,797,783 -1,278 -6.7% $1406.72 17,869 08 Jan 2026 Fortuna Trust dated June 1, 2018 F3
transaction TDG Common Stock Sale $3,831,096 -2,722 -15% $1407.46 15,147 08 Jan 2026 Fortuna Trust dated June 1, 2018 F4
transaction TDG Common Stock Sale $7,378,815 -5,239 -35% $1408.44 9,908 08 Jan 2026 Fortuna Trust dated June 1, 2018 F5
transaction TDG Common Stock Sale $676,592 -480 -4.8% $1409.57 9,428 08 Jan 2026 Fortuna Trust dated June 1, 2018 F6
transaction TDG Common Stock Sale $1,311,904 -930 -9.9% $1410.65 8,498 08 Jan 2026 Fortuna Trust dated June 1, 2018 F7
transaction TDG Common Stock Sale $480,478 -340 -4% $1413.17 8,158 08 Jan 2026 Fortuna Trust dated June 1, 2018

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction TDG Stock Option. Options Exercise $0 -17,373 -26% $0.000000 50,627 08 Jan 2026 Common Stock 17,373 $342.31 Fortuna Trust dated June 1, 2018 F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 The exercise price has been adjusted for dividends declared since August 1, 2022.
F2 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,405.0000 - $1,405.9900. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F3 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,406.0000 - $1,406.9950. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F4 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,407.0000 - $1,407.9150. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F5 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,408.1500 - $1,409.1100. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F6 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,409.1600 - $1,410.0800. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F7 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,410.4600 - $1,411.4350. The reporting person hereby undertakes, upon request of the Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.