[Form 4] TransDigm Group Incorporated Insider Trading Activity

Rhea-AI Filing Summary

TransDigm Group Co-Chief Operating Officer Joel Reiss reported significant insider trading activity on June 20, 2025. The transactions involved both the exercise of stock options and subsequent sales of common stock:

• Exercised 3,000 stock options at $284.97 per share (originally granted with expiration date 11/08/2027)
• Sold a total of 3,000 shares in multiple transactions at prices ranging from $1,410.11 to $1,431.11 per share
• Net reduction in directly held common stock from 6,600 to 3,600 shares
• Retains 59,000 stock options following the transactions

The trading pattern suggests a typical exercise-and-sell transaction where the executive exercised options and immediately sold the acquired shares, realizing a significant profit given the substantial difference between the exercise price ($284.97) and market prices (approximately $1,410-$1,431). The transactions were executed through multiple trades at varying price points, indicating a structured selling approach.

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).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Reiss Joel

(Last) (First) (Middle)

1350 EUCLID AVE

SUITE 1600

(Street)

CLEVELAND OH 44115

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
06/20/2025

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

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	06/20/2025		M		3,000	A	$284.97	6,600	D
Common Stock	06/20/2025		S		200	D	$1,410.11	6,400	D
Common Stock	06/20/2025		S		100	D	$1,411.855	6,300	D
Common Stock	06/20/2025		S		356	D	$1,420.6967(1)	5,944	D
Common Stock	06/20/2025		S		154	D	$1,421.4892(2)	5,790	D
Common Stock	06/20/2025		S		254	D	$1,422.5211(3)	5,536	D
Common Stock	06/20/2025		S		447	D	$1,424.3974(4)	5,089	D
Common Stock	06/20/2025		S		233	D	$1,425.2223(5)	4,856	D
Common Stock	06/20/2025		S		495	D	$1,426.7934(6)	4,361	D
Common Stock	06/20/2025		S		10	D	$1,427.715	4,351	D
Common Stock	06/20/2025		S		451	D	$1,430.0264(7)	3,900	D
Common Stock	06/20/2025		S		300	D	$1,431.11	3,600	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
Stock Option	$284.97	06/20/2025		M			3,000	09/30/2021	11/08/2027	Common Stock	3,000	$0	59,000	D

Explanation of Responses:

1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,420.11 - $1,421.01. 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.

2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,421.210 - $1,422.035. 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.

3. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,422.43 - $1,423.26. 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.

4. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,424.05 - $1,425.02. 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.

5. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,425.05 - $1,425.63. 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.

6. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,426.25 - $1,427.03. 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.

7. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,430.00 - $1,430.58. 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.

	/s/ Gabrielle Feuer as attorney-in-fact	06/20/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many TDG shares did Co-COO Joel Reiss sell on June 20, 2025?

Joel Reiss sold a total of 3,000 shares of TransDigm Group (TDG) common stock on June 20, 2025, through multiple transactions at prices ranging from approximately $1,410 to $1,431 per share.

What was the price range of TDG stock sales by Joel Reiss in the June 20, 2025 transactions?

The transactions occurred at various price points, with the lowest sale at $1,410.11 per share and the highest at $1,431.11 per share. The sales were executed in multiple blocks at weighted average prices within this range.

How many TDG shares does Joel Reiss own after the June 20, 2025 transactions?

After the reported transactions, Joel Reiss directly owns 3,600 shares of TransDigm Group (TDG) common stock. Additionally, he holds 59,000 stock options following the exercise of 3,000 options.

What stock options did TDG's Co-COO exercise in this Form 4 filing?

Joel Reiss exercised 3,000 stock options at an exercise price of $284.97 per share. These options were exercisable from September 30, 2021, with an expiration date of November 8, 2027.

Was the TDG insider transaction by Joel Reiss made under a 10b5-1 plan?

No, the Form 4 filing does not indicate that these transactions were made pursuant to a 10b5-1 plan, as the corresponding checkbox on the form was not marked.