Kevin M. Stein - 02 Feb 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
02 Feb 2026
Net transactions value
-$36,241,996
Form type
4
Filing time
03 Feb 2026, 16:37:39 UTC
Previous filing
16 Jan 2026
Next filing
05 Mar 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 03 Feb 2026 0001431675

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TDG Common Stock Options Exercise $8,532,000 +25,000 +306% $341.28 33,158 02 Feb 2026 Fortuna Trust dated June 1, 2018 F1
transaction TDG Common Stock Options Exercise $7,873,130 +23,000 +69% $342.31 56,158 02 Feb 2026 Fortuna Trust dated June 1, 2018 F1
transaction TDG Common Stock Sale $56,187 -40 -0.07% $1404.68 56,118 02 Feb 2026 Fortuna Trust dated June 1, 2018
transaction TDG Common Stock Sale $306,893 -218 -0.39% $1407.76 55,900 02 Feb 2026 Fortuna Trust dated June 1, 2018 F2
transaction TDG Common Stock Sale $2,819 -2 -0% $1409.71 55,898 02 Feb 2026 Fortuna Trust dated June 1, 2018
transaction TDG Common Stock Sale $8,466 -6 -0.01% $1410.98 55,892 02 Feb 2026 Fortuna Trust dated June 1, 2018 F3
transaction TDG Common Stock Sale $1,412 -1 -0% $1412.26 55,891 02 Feb 2026 Fortuna Trust dated June 1, 2018
transaction TDG Common Stock Sale $247,458 -175 -0.31% $1414.04 55,716 02 Feb 2026 Fortuna Trust dated June 1, 2018 F4
transaction TDG Common Stock Sale $82,033 -58 -0.1% $1414.36 55,658 02 Feb 2026 Fortuna Trust dated June 1, 2018 F5
transaction TDG Common Stock Sale $73,613 -52 -0.09% $1415.63 55,606 02 Feb 2026 Fortuna Trust dated June 1, 2018 F6
transaction TDG Common Stock Sale $2,833 -2 -0% $1416.40 55,604 02 Feb 2026 Fortuna Trust dated June 1, 2018 F7
transaction TDG Common Stock Sale $68,037 -48 -0.09% $1417.44 55,556 02 Feb 2026 Fortuna Trust dated June 1, 2018 F8
transaction TDG Common Stock Sale $158,976 -112 -0.2% $1419.43 55,444 02 Feb 2026 Fortuna Trust dated June 1, 2018 F9
transaction TDG Common Stock Sale $316,774 -223 -0.4% $1420.51 55,221 02 Feb 2026 Fortuna Trust dated June 1, 2018 F10
transaction TDG Common Stock Sale $1,224,109 -861 -1.6% $1421.73 54,360 02 Feb 2026 Fortuna Trust dated June 1, 2018 F11
transaction TDG Common Stock Sale $3,045,521 -2,141 -3.9% $1422.48 52,219 02 Feb 2026 Fortuna Trust dated June 1, 2018 F12
transaction TDG Common Stock Sale $5,690,381 -3,997 -7.7% $1423.66 48,222 02 Feb 2026 Fortuna Trust dated June 1, 2018 F13
transaction TDG Common Stock Sale $6,921,488 -4,859 -10% $1424.47 43,363 02 Feb 2026 Fortuna Trust dated June 1, 2018 F14
transaction TDG Common Stock Sale $8,419,438 -5,906 -14% $1425.57 37,457 02 Feb 2026 Fortuna Trust dated June 1, 2018 F15
transaction TDG Common Stock Sale $8,081,724 -5,665 -15% $1426.61 31,792 02 Feb 2026 Fortuna Trust dated June 1, 2018 F16
transaction TDG Common Stock Sale $9,513,515 -6,665 -21% $1427.38 25,127 02 Feb 2026 Fortuna Trust dated June 1, 2018 F17
transaction TDG Common Stock Sale $2,953,008 -2,067 -8.2% $1428.64 23,060 02 Feb 2026 Fortuna Trust dated June 1, 2018 F18
transaction TDG Common Stock Sale $2,587,600 -1,810 -7.8% $1429.61 21,250 02 Feb 2026 Fortuna Trust dated June 1, 2018 F19
transaction TDG Common Stock Sale $2,884,841 -2,017 -9.5% $1430.26 19,233 02 Feb 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 -23,000 -53% $0.000000 20,000 02 Feb 2026 Common Stock 23,000 $342.31 Fortuna Trust dated June 1, 2018 F1
transaction TDG Stock Option Options Exercise $0 -25,000 -58% $0.000000 17,940 02 Feb 2026 Common Stock 25,000 $341.28 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 $1,407.1000 - $1,407.8900. 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 $1,410.9300 - $1,411.2300. 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 $1,413.3000 - $1,414.2900. 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 $1,414.3000 - $1,414.6900. 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 $1,415.3000 - $1,416.1000. 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 $1,416.3300 - $1,416.4600. 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 $1,417.4150 - $1,417.5900. 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 $1,418.8500 - $1,419.7000. 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 $1,420.0200 - $1,420.8800. 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 $1,421.0200 - $1,422.0100. 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 $1,422.0200 - $1,423.0100. 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 $1,423.0200 - $1,424.0100. 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 $1,424.0300 - $1,425.0200. 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 $1,425.0300 - $1,426.0200. 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 $1,426.0300 - $1,427.0100. 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 $1,427.0300 - $1,428.0200. 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 $1,428.0300 - $1,429.0200. 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 $1,429.0500 - $1,430.0400. 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.
F20 Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,430.0500 - $1,431.0300. 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.

Remarks:

Due to a 30-line item limitation in Table 1, this is the first of two Form 4s filed by the reporting person for this transaction.