Kevin M. Stein - 05 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
05 Jan 2026
Net transactions value
-$30,030,913
Form type
4
Filing time
06 Jan 2026, 16:32:54 UTC
Previous filing
05 Dec 2025
Next filing
09 Jan 2026

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 06 Jan 2026 0001431675

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TDG Common Stock Options Exercise $1,899,487 +17,940 +220% $105.88 26,098 05 Jan 2026 Fortuna Trust dated June 1, 2018 F1
transaction TDG Common Stock Options Exercise $2,409,437 +7,060 +27% $341.28 33,158 05 Jan 2026 Fortuna Trust dated June 1, 2018 F1
transaction TDG Common Stock Sale $762,490 -560 -1.7% $1361.59 32,598 05 Jan 2026 Fortuna Trust dated June 1, 2018
transaction TDG Common Stock Sale $27,262 -20 -0.06% $1363.08 32,578 05 Jan 2026 Fortuna Trust dated June 1, 2018
transaction TDG Common Stock Sale $218,330 -160 -0.49% $1364.57 32,418 05 Jan 2026 Fortuna Trust dated June 1, 2018 F2
transaction TDG Common Stock Sale $348,632 -255 -0.79% $1367.18 32,163 05 Jan 2026 Fortuna Trust dated June 1, 2018 F3
transaction TDG Common Stock Sale $979,569 -716 -2.2% $1368.11 31,447 05 Jan 2026 Fortuna Trust dated June 1, 2018 F4
transaction TDG Common Stock Sale $5,415,943 -3,956 -13% $1369.05 27,491 05 Jan 2026 Fortuna Trust dated June 1, 2018 F5
transaction TDG Common Stock Sale $6,106,628 -4,457 -16% $1370.12 23,034 05 Jan 2026 Fortuna Trust dated June 1, 2018 F6
transaction TDG Common Stock Sale $2,436,429 -1,777 -7.7% $1371.09 21,257 05 Jan 2026 Fortuna Trust dated June 1, 2018 F7
transaction TDG Common Stock Sale $2,859,331 -2,084 -9.8% $1372.04 19,173 05 Jan 2026 Fortuna Trust dated June 1, 2018 F8
transaction TDG Common Stock Sale $660,419 -481 -2.5% $1373.01 18,692 05 Jan 2026 Fortuna Trust dated June 1, 2018 F9
transaction TDG Common Stock Sale $1,401,733 -1,020 -5.5% $1374.25 17,672 05 Jan 2026 Fortuna Trust dated June 1, 2018 F10
transaction TDG Common Stock Sale $1,839,966 -1,338 -7.6% $1375.16 16,334 05 Jan 2026 Fortuna Trust dated June 1, 2018 F11
transaction TDG Common Stock Sale $2,183,943 -1,587 -9.7% $1376.15 14,747 05 Jan 2026 Fortuna Trust dated June 1, 2018 F12
transaction TDG Common Stock Sale $555,050 -403 -2.7% $1377.30 14,344 05 Jan 2026 Fortuna Trust dated June 1, 2018 F13
transaction TDG Common Stock Sale $1,707,970 -1,239 -8.6% $1378.51 13,105 05 Jan 2026 Fortuna Trust dated June 1, 2018 F14
transaction TDG Common Stock Sale $1,680,402 -1,218 -9.3% $1379.64 11,887 05 Jan 2026 Fortuna Trust dated June 1, 2018 F15
transaction TDG Common Stock Sale $531,505 -385 -3.2% $1380.53 11,502 05 Jan 2026 Fortuna Trust dated June 1, 2018 F16
transaction TDG Common Stock Sale $1,247,519 -903 -7.9% $1381.53 10,599 05 Jan 2026 Fortuna Trust dated June 1, 2018 F17
transaction TDG Common Stock Sale $2,581,356 -1,867 -18% $1382.62 8,732 05 Jan 2026 Fortuna Trust dated June 1, 2018 F18
transaction TDG Common Stock Sale $379,248 -274 -3.1% $1384.12 8,458 05 Jan 2026 Fortuna Trust dated June 1, 2018 F19
transaction TDG Common Stock Sale $416,110 -300 -3.5% $1387.04 8,158 05 Jan 2026 Fortuna Trust dated June 1, 2018 F20

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 -17,940 -47% $0.000000 20,000 05 Jan 2026 Common Stock 17,940 $105.88 Fortuna Trust dated June 1, 2018
transaction TDG Stock Option Options Exercise $0 -7,060 -14% $0.000000 42,940 05 Jan 2026 Common Stock 7,060 $341.28 Fortuna Trust dated June 1, 2018
* 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 $1,364.4650 - $1,365.0000. 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 $1,366.5600 - $1,367.4900. 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 $1,367.5700 - $1,368.5500. 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 $1,368.5800 - $1,369.5700. 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 $1,369.5800 - $1,370.5600. 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 $1,370.5800 - $1,371.5200. 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.
F8 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,371.6300 - $1,372.6200. 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.
F9 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,372.6300 - $1,373.5700. 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.
F10 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,373.7400 - $1,374.7300. 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.
F11 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,374.7750 - $1,375.7200. 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.
F12 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,375.7900 - $1,376.7600. 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.
F13 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,376.8600 - $1,377.7800. 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.
F14 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,377.9500 - $1,378.9200. 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.
F15 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,379.0000 - $1,379.9800. 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.
F16 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,380.0000 - $1,380.9800. 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.
F17 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,381.0200 - $1,381.9400. 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.
F18 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,382.1600 - $1,383.0500. 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.
F19 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,383.6400 - $1,384.4900. 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.
F20 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,387.0300 - $1,387.0400. 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.