TransDigm Group INC — Director's Dealing 2026

Jan 16, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TransDigm Group INC (TDG)
CIK: 0001260221
Period of Report: 2026-01-15

Reporting Person: Reiss Joel (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-15	Common Stock	M	3900	$284.97	Acquired	7500	Direct
2026-01-15	Common Stock	S	44	$1420.375	Disposed	7456	Direct
2026-01-15	Common Stock	S	67	$1421.8916	Disposed	7389	Direct
2026-01-15	Common Stock	S	95	$1422.628	Disposed	7294	Direct
2026-01-15	Common Stock	S	128	$1423.8024	Disposed	7166	Direct
2026-01-15	Common Stock	S	90	$1425.104	Disposed	7076	Direct
2026-01-15	Common Stock	S	245	$1426.3497	Disposed	6831	Direct
2026-01-15	Common Stock	S	396	$1427.2718	Disposed	6435	Direct
2026-01-15	Common Stock	S	477	$1428.0254	Disposed	5958	Direct
2026-01-15	Common Stock	S	260	$1429.1449	Disposed	5698	Direct
2026-01-15	Common Stock	S	372	$1430.2077	Disposed	5326	Direct
2026-01-15	Common Stock	S	453	$1431.2593	Disposed	4873	Direct
2026-01-15	Common Stock	S	257	$1432.3994	Disposed	4616	Direct
2026-01-15	Common Stock	S	486	$1433.3583	Disposed	4130	Direct
2026-01-15	Common Stock	S	200	$1434.177	Disposed	3930	Direct
2026-01-15	Common Stock	S	205	$1435.1371	Disposed	3725	Direct
2026-01-15	Common Stock	S	35	$1436.1486	Disposed	3690	Direct
2026-01-15	Common Stock	S	50	$1437.5608	Disposed	3640	Direct
2026-01-15	Common Stock	S	40	$1438.9075	Disposed	3600	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-15	Stock Option	$284.97	M	3900	Disposed	2027-11-08	Common Stock (3900)	Direct

Footnotes

F1: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,420.0100 - $1,420.9900. 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.

F2: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,421.1300 - $1,422.0800. 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.

F3: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,422.2800 - $1,423.1700. 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 $1,423.4100 - $1,424.4000. 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 $1,424.4600 - $1,425.3400. 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 $1,425.7100 - $1,426.6800. 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 $1,426.7300 - $1,427.7200. 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.

F8: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,427.7400 - $1,428.7200. 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.

F9: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,428.7700 - $1,429.7200. 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.

F10: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,429.8000 - $1,430.7500. 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 $1,430.8000 - $1,431.7800. 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.

F12: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,431.8500 - $1,432.8400. 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 $1,432.8500 - $1,433.7400. 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 $1,433.8500 - $1,434.5100. 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 $1,434.8800 - $1,435.8400. 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 $1,435.9000 - $1,436.3300. 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 $1,436.9500 - $1,437.7600. 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.

F18: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,438.8500 - $1,439.0800. 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.