[Form 4] TransDigm Group INC Insider Trading Activity

Rhea-AI Filing Summary

TransDigm Group (TDG) reported a Form 4 for Co‑Chief Operating Officer Joel Reiss, reflecting a grant of stock options for 9,700 shares at an exercise price of $1,291.97 on 11/04/2025.

The options expire on 11/04/2035 and are scheduled to vest 50% in 2029 and 50% in 2030, subject to achieving annual operating performance targets in each year. Following the grant, 9,700 derivative securities are beneficially owned on a direct basis.

Insights

Equity compensation analyst

Performance-vested option grant; administrative disclosure, neutral impact.

TransDigm Group disclosed a grant of stock options to Co‑COO Joel Reiss: $1,291.97 exercise price for 9,700 underlying common shares on 11/04/2025. The award is a standard executive equity grant recorded via Form 4.

The vesting terms are performance-based: 50% in 2029 and 50% in 2030, each year contingent on achieving annual operating performance targets, with expiration on 11/04/2035. Actual realizable value depends on future share price and whether performance targets are met.

Because this is a routine compensation grant, it does not by itself change the investment thesis. Subsequent disclosures may detail performance target outcomes and any exercises upon vesting.

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).

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)
11/04/2025

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

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	$1,291.97	11/04/2025		A		9,700		(1)	11/04/2035	Common Stock	9,700	$0	9,700	D

Explanation of Responses:

1. These options are exercisable at 50% per year in 2029 and 50% in 2030 subject to the achievement of annual operating performance targets in each year.

	/s/ Rachel Quinlan as attorney in fact for Joel Reiss	11/06/2025
	** 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

What did TransDigm (TDG) report on this Form 4?

A grant of stock options to Co‑COO Joel Reiss for 9,700 shares at an exercise price of $1,291.97 on 11/04/2025.

What are the vesting terms of the TDG options granted to Joel Reiss?

They vest 50% in 2029 and 50% in 2030, each year subject to annual operating performance targets.

When do the reported TDG stock options expire?

The options expire on 11/04/2035.

How many derivative securities does the reporting person hold after this grant?

Following the transaction, 9,700 derivative securities are beneficially owned directly.

What is the exercise price of the TDG options in this filing?

The exercise price is $1,291.97 per share.

Who is the reporting person in this TDG Form 4?

Co‑Chief Operating Officer Joel Reiss.