TransDigm Group (NYSE: TDG) director reports option exercise and $1,360+ share sales

Rhea-AI Filing Summary

TransDigm Group Inc. filed a Form 4 reporting equity transactions by director Kevin Stein through the Fortuna Trust dated June 1, 2018. On 11/28/2025, the trust exercised a stock option for 4,592 shares of TransDigm common stock at an exercise price of $105.88 per share. The option relates to an award originally exercisable from 09/30/2018 and expiring on 04/25/2028, and its exercise price has been adjusted for dividends declared since August 1, 2022.

On the same date, the trust reported sales of TransDigm common stock in three transactions of 2,997, 1,545 and 50 shares at volume-weighted average prices of approximately $1,360.44, $1,361.25 and $1,362.43, respectively, within narrow intraday price ranges. Following these transactions, the Fortuna Trust indirectly held 8,158 shares of TransDigm common stock.

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

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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^*

Stein Kevin M

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/28/2025

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	11/28/2025		M		4,592	A	$105.88(1)	12,750	I	Fortuna Trust dated June 1, 2018
Common Stock	11/28/2025		S		2,997	D	$1,360.4385(2)	9,753	I	Fortuna Trust dated June 1, 2018
Common Stock	11/28/2025		S		1,545	D	$1,361.2498(3)	8,208	I	Fortuna Trust dated June 1, 2018
Common Stock	11/28/2025		S		50	D	$1,362.431(4)	8,158	I	Fortuna Trust dated June 1, 2018

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	$105.88	11/28/2025		M			4,592	09/30/2018	04/25/2028	Common Stock	4,592	$0	55,466	I	Fortuna Trust dated June 1, 2018

Explanation of Responses:

1. The exercise price has been adjusted for dividends declared since August 1, 2022.

2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,360.0000- $1,360.9400. 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 $1,361.0800- $1,361.8600. 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 $1,362.3000- $1,362.4900. 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/ Lisa Tortora French as attorney in-fact for Kevin Stein	12/01/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

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

The filing reports that director Kevin Stein, through the Fortuna Trust dated June 1, 2018, exercised a stock option for 4,592 shares of TransDigm common stock and sold shares in several transactions on 11/28/2025.

How many TransDigm (TDG) shares were acquired and sold in the reported transactions?

The trust acquired 4,592 shares of TransDigm common stock through an option exercise and reported sales of 2,997, 1,545 and 50 shares in three separate open-market transactions on 11/28/2025.

At what prices were the TransDigm (TDG) shares sold in the Form 4 filing?

The reported volume-weighted average sale prices were $1,360.4385, $1,361.2498 and $1,362.431 per share. Each represents an average within stated price ranges, and the reporting person has undertaken to provide detailed per-trade pricing information upon request.

What was the stock option exercise price and terms reported for TransDigm (TDG)?

The stock option was exercised at $105.88 per share for 4,592 shares of common stock. The option became exercisable on 09/30/2018 and has an expiration date of 04/25/2028, and its exercise price has been adjusted for dividends declared since August 1, 2022.

How many TransDigm (TDG) shares does the reporting person hold after these transactions?

After the reported option exercise and sales on 11/28/2025, the Fortuna Trust dated June 1, 2018 is shown as indirectly holding 8,158 shares of TransDigm common stock.

What is the ownership form of the reported TransDigm (TDG) holdings?

The Form 4 indicates that the reported TransDigm common stock and stock options are held indirectly through the Fortuna Trust dated June 1, 2018, rather than directly by the individual.