SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Wynne Sarah (Last) (First) (Middle) 1301 E. 9TH STREET SUITE 3000 (Street) CLEVELAND OH 44114 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 01/10/2019	3. Issuer Name and Ticker or Trading Symbol TransDigm Group INC [ TDG ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Corporate Accounting Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	100	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	09/30/2017	11/15/2023	Common Stock	2,250	148.45	D
Stock Option	09/30/2010	11/25/2019	Common Stock	3,000	43.35	D
Stock Option	09/30/2015	11/14/2021	Common Stock	3,000	97.42	D
Stock Option	09/30/2015	04/22/2025	Common Stock	5,700	221.81	D
Stock Option	09/30/2019	11/05/2028	Common Stock	5,850	347.17	D
Stock Option	09/30/2020	11/10/2026	Common Stock	2,700	269.42	D

Explanation of Responses:

Remarks:

	Halle Fine Terrion as attorney in fact for Sarah Wynne.	01/14/2019
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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