TransDigm Group INC — Director's Dealing 2011

Dec 20, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TransDigm Group INC (TDG)
CIK: 0001260221
Period of Report: 2011-12-15

Reporting Person: Riley James M (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-12-15	Common Stock	M	63	$6.68	Acquired	63	Direct
2011-12-15	Common Stock	M	7437	$13.37	Acquired	7500	Direct
2011-12-15	Common Stock	S	7500	$95.0997	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-12-15	Stock Option	$8.52	M	63	Disposed	2014-12-30	Common Stock (63)	Direct
2011-12-15	Stock Option	$13.37	M	7437	Disposed	2015-10-01	Common Stock (7437)	Direct

Footnotes

F1: Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $94.93 - $95.37. 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.