SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Santana Michele (Last) (First) (Middle) 3469 AEGEAN RD (Street) AKRON OH 44333 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol TransDigm Group INC [ TDG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 02/28/2020
	4. 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
	Rule 10b5-1(c) Transaction Indication Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/28/2020		P		8	A	$532.4699	646	D
Common Stock	05/04/2020		P(1)		1	A	$328.5256	647	D
Common Stock	07/28/2020(2)		P		1	A	$432.1927	648	D
Common Stock	09/10/2020		S(1)		1	D	$506.263	647	D
Common Stock	10/01/2020		P		4	A	$482.93	651	D
Common Stock	11/03/2020		S(2)		1	D	$510.6185	650	D
Common Stock	05/24/2021		P(3)		1	A	$616.4633	651	D
Common Stock	07/28/2021		S(3)		1	D	$650.7188	650	D
Common Stock	12/31/2021		P		1	A	$634.26	651	D
Common Stock	04/04/2022		P		1	A	$668.8809	652	D
Common Stock	12/23/2022		P(4)		1	A	$619.5446	653	D
Common Stock	01/23/2023		S(4)		1	D	$681.1003	652	D
Common Stock	01/24/2023		P(5)(6)(7)		10	A	$684.6354	662	D
Common Stock	03/07/2023		S(5)		1	D	$764.2975	661	D
Common Stock	03/24/2023		P(8)		1	A	$692.9008	662	D
Common Stock	04/14/2023		S(6)		1	D	$751.9448	661	D
Common Stock	05/15/2023		S(7)		1	D	$800.2798	660	D
Common Stock	07/10/2023		P(9)		1	A	$883.2957	661	D
Common Stock	07/27/2023		S(8)		1	D	$889.3841	660	D
Common Stock	12/22/2023		S(9)(10)		1	D	$1,000.5483	659	D
Common Stock	02/12/2024		S		1	D	$1,112.2191	658	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows two and four of this Form 4. The Reporting Person has paid the Issuer $177.7374, representing the full amount of the profit realized in connection with these applicable short-swing transaction.

2. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows three and six of this Form 4. The Reporting Person has paid the Issuer $78.4258, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

3. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows seven and eight of this Form 4. The Reporting Person has paid the Issuer $34.2555, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

4. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 11 and 12 of this Form 4. The Reporting Person has paid the Issuer $61.5557, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

5. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 13 and 14 of this Form 4. The Reporting Person has paid the Issuer $79.6621, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

6. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 13 and 16 of this Form 4. The Reporting Person has paid the Issuer $67.3094, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

7. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 13 and 17 of this Form 4. The Reporting Person has paid the Issuer $115.6444, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

8. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 15 and 19 of this Form 4. The Reporting Person has paid the Issuer $196.4833, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

9. Previously-unreported purchase and sale, respectively, matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended, to the extent of one share, with each such previously-unreported sale as reported on rows 18 and 20 of this Form 4. The Reporting Person has paid the Issuer $117.2526, representing the full amount of the profit realized in connection with this applicable short-swing transaction.

10. The Reporting Person has paid the Issuer a total of $928.33, representing the full amount of the profit realized in connection with these applicable short-swing transactions disclosed in this Form 4.

	/s/ Gabrielle Feuer as attorney-in-fact	05/09/2024
	** 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 4 (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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