TransDigm Group INC — Director's Dealing 2026

Jan 6, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TransDigm Group INC (TDG)
CIK: 0001260221
Period of Report: 2026-01-05

Reporting Person: Stein Kevin M (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-05	Common Stock	M	17940	$105.88	Acquired	26098	Indirect
2026-01-05	Common Stock	M	7060	$341.28	Acquired	33158	Indirect
2026-01-05	Common Stock	S	560	$1361.5900	Disposed	32598	Indirect
2026-01-05	Common Stock	S	20	$1363.0800	Disposed	32578	Indirect
2026-01-05	Common Stock	S	160	$1364.5653	Disposed	32418	Indirect
2026-01-05	Common Stock	S	255	$1367.1848	Disposed	32163	Indirect
2026-01-05	Common Stock	S	716	$1368.1129	Disposed	31447	Indirect
2026-01-05	Common Stock	S	3956	$1369.0453	Disposed	27491	Indirect
2026-01-05	Common Stock	S	4457	$1370.1206	Disposed	23034	Indirect
2026-01-05	Common Stock	S	1777	$1371.0914	Disposed	21257	Indirect
2026-01-05	Common Stock	S	2084	$1372.0398	Disposed	19173	Indirect
2026-01-05	Common Stock	S	481	$1373.0119	Disposed	18692	Indirect
2026-01-05	Common Stock	S	1020	$1374.2481	Disposed	17672	Indirect
2026-01-05	Common Stock	S	1338	$1375.1611	Disposed	16334	Indirect
2026-01-05	Common Stock	S	1587	$1376.1458	Disposed	14747	Indirect
2026-01-05	Common Stock	S	403	$1377.2956	Disposed	14344	Indirect
2026-01-05	Common Stock	S	1239	$1378.5069	Disposed	13105	Indirect
2026-01-05	Common Stock	S	1218	$1379.6401	Disposed	11887	Indirect
2026-01-05	Common Stock	S	385	$1380.5337	Disposed	11502	Indirect
2026-01-05	Common Stock	S	903	$1381.5268	Disposed	10599	Indirect
2026-01-05	Common Stock	S	1867	$1382.6226	Disposed	8732	Indirect
2026-01-05	Common Stock	S	274	$1384.1186	Disposed	8458	Indirect
2026-01-05	Common Stock	S	300	$1387.0350	Disposed	8158	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-05	Stock Option	$105.88	M	17940	Disposed	2028-04-25	Common Stock (17940)	Indirect
2026-01-05	Stock Option	$341.28	M	7060	Disposed	2029-11-15	Common Stock (7060)	Indirect

Footnotes

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.