TransDigm (TDG) director exercises stock options and reports TDG share sales

Rhea-AI Filing Summary

TransDigm Group Inc. reported an insider stock transaction involving a company director. A stock option for 17,526 shares of common stock with an exercise price of $105.88 was exercised on 12/04/2025 and held indirectly through the Fortuna Trust dated June 1, 2018.

The trust then reported a series of open-market sales of TransDigm common stock on the same date at weighted average prices ranging from about $1,360.0000 to $1,367.2300 per share. After these transactions, the trust held 8,158 shares of TransDigm common stock and 37,940 derivative securities beneficially owned. The filing notes that the reported sale prices are weighted averages and that full price breakdowns for each trade within the ranges are available upon request.

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
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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)
12/04/2025

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
Common Stock	12/04/2025		M		17,526	A	$105.88(1)	25,684	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		6,910	D	$1,360.1483(2)	18,774	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		2,081	D	$1,361.4284(3)	16,693	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		1,794	D	$1,362.6281(4)	14,899	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		1,397	D	$1,363.3925(5)	13,502	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		3,139	D	$1,364.5755(6)	10,363	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		1,680	D	$1,365.3326(7)	8,683	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		495	D	$1,366.1918(8)	8,188	I	Fortuna Trust dated June 1, 2018
Common Stock	12/04/2025		S		30	D	$1,367.2233(9)	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	12/04/2025		M			17,526	09/30/2018	04/25/2028	Common Stock	17,526	$0	37,940	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 $1,360.000 - $1,360.9900. 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 $1,361.0000- $1,361.9450. 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 $1,362.02000- $1,363.0000. 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 $1,363.0400- $1,364.0200. 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 $1,364.0400- $1,365.0100. 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 $1,365.0400- $1,366.0300. 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.

8. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,366.1100- $1,366.5300. 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.

9. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,367.2200 - $1,367.2300. 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	12/05/2025
	** 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).
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FAQ

What insider transaction did TransDigm Group Inc. (TDG) disclose in this Form 4?

The filing reports that a director exercised a stock option for 17,526 shares of TransDigm common stock at an exercise price of $105.88 per share on 12/04/2025, held indirectly through the Fortuna Trust dated June 1, 2018.

What stock sales by the insider were reported for TransDigm Group Inc. (TDG)?

On 12/04/2025, the Fortuna Trust reported multiple open-market sales of TransDigm common stock at weighted average prices between $1,360.0000 and $1,367.2300 per share, all coded as disposition transactions.

How many TransDigm (TDG) shares were beneficially owned after the reported transactions?

Following the reported trades, the Fortuna Trust dated June 1, 2018 beneficially owned 8,158 shares of TransDigm common stock and 37,940 derivative securities, all reported as indirectly owned.

What is the nature of the derivative security reported for TransDigm Group Inc. (TDG)?

The filing lists a stock option covering 17,526 shares of TransDigm common stock with an exercise price of $105.88, first exercisable on 09/30/2018 and expiring on 04/25/2028, held indirectly through the Fortuna Trust.

How were the reported sale prices for TransDigm (TDG) shares calculated?

Each line item’s price is described as a weighted average price, with the filing stating that the underlying shares were sold at varying prices within specified ranges, and that full details of the number of shares sold at each price will be provided upon request to the issuer, the SEC, or any security holder.

What relationship does the reporting person have to TransDigm Group Inc. (TDG)?

The reporting person is identified as a Director of TransDigm Group Inc., and the transactions are reported as indirect ownership through the Fortuna Trust dated June 1, 2018.