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Filing Details

Accession Number:: 0000904454-11-000484
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2011-08-18 19:40:16
Reporting Period:: 2011-08-16

Filing Date:: 2011-08-18
Accepted Time:: 2011-08-18 19:40:16
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1260221	Transdigm Group Inc	TDG	Aircraft Parts & Auxiliary Equipment, Nec (3728)	510484716

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1234544	J Robert Small	C/O Berkshire Partners Llc 200 Clarendon Street, 35Th Floor Boston MA 02116		Yes	No	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-08-16	22,678	$90.24	158,662	No	4	P	Indirect	By Stockbridge Partners LLC

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By Stockbridge Partners LLC

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	4,658,791	Indirect	By Berkshire Entities
Common Stock	5,000	Direct

Footnotes

Represents shares acquired and held by Stockbridge Partners LLC ("SP") on behalf of a managed account over which it has shared voting and sole dispositive power. This Form 4 has been filed because the Reporting Person is a director of the Issuer and a managing member of SP. As such, the Reporting Person may be deemed to have shared voting and/or dispositive power over these shares. However, the Reporting Person disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest, if any, therein.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $89.91 to $90.50. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.
Owned by Berkshire Fund VII, L.P. ("VII"), Berkshire Fund VII-A, L.P. ("VII-A"), Berkshire Investors LLC ("Investors"), Berkshire Investors III LLC ("Investors III"), Stockbridge Fund, L.P. ("SF"), Stockbridge Fund M, L.P. ("SFM"), Stockbridge Absolute Return Fund, L.P. ("SARF") and Stockbridge Master Fund (OS), L.P. ("SOS") (collectively, the "Berkshire Entities"). Seventh Berkshire associates LLC ("7BA") is the general partner of each of VII and VII-A. Stockbridge Associates LLC ("SA") is the general partner of SF, SFM, SARF and SOS. The Reporting Person is a managing member of each of 7BA, SA, Investors and Investors III. As such, the Reporting Person may be deemed to have shared voting and/or dispositive power over the shares held by such entities. However, the Reporting Person disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest therein.