TransDigm (TDG) director trust sells 700 shares at $1,360

TransDigm Group (TDG): insider transaction reported.

Rhea-AI Filing Summary

TransDigm Group (TDG): insider transaction reported. On 10/27/2025, the Fortuna Trust dated June 1, 2018, affiliated with a company director, exercised 700 stock options at $105.88 and sold 700 common shares at an average $1,360. Following these transactions, the trust held 8,158 common shares indirectly. The option exercise related to a grant exercisable since 09/30/2018 and expiring 04/25/2028, with 72,800 derivative securities remaining indirectly held.

Insider Trade Summary

Exercise and Sale: 700 shares ($878K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Stein Kevin M

Role Director

Sold 700 shs ($952K)

Approx. gross sale proceeds $952K

Approx. exercise cost $74K

Approx. pre-tax spread $878K

Type	Security	Shares	Price	Value
Exercise	Stock Option	700	$0.00	$0.00
Exercise	Common Stock	700	$105.88	$74K
Sale	Common Stock	700	$1,360.00	$952K

Holdings After Transaction: Stock Option — 72,800 contracts (Indirect, Fortuna Trust dated June 1, 2018); Common Stock — 8,158 shares (Indirect, Fortuna Trust dated June 1, 2018)

Footnotes (2)

1. F1. The exercise price has been adjusted for dividends declared since August 1, 2022.
2. F2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,360.0000 - $1,360.9999. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did TDG disclose in this Form 4?

An affiliated trust of a director exercised 700 stock options at $105.88 and sold 700 common shares at an average $1,360 on 10/27/2025.

How many TDG shares were sold and at what price?

The trust sold 700 shares at an average price of $1,360, with sales across a range of $1,360.0000–$1,360.9999.

How many options were exercised and at what exercise price?

The trust exercised 700 options at an exercise price of $105.88.

What were the indirect share holdings after the transactions?

Indirect holdings were 8,158 common shares after the reported transactions.

Which entity holds these TDG securities?

The securities are held indirectly by the Fortuna Trust dated June 1, 2018.

What are the key dates for the derivative (option) position?

The option was exercisable since 09/30/2018 and expires on 04/25/2028; 72,800 derivative securities remained indirectly held after.

Was the $1,360 sale price a single trade price?

No. It is an average weighted price; detailed trade breakdowns are available upon request to the issuer or the Commission.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 10/28/2025 - 05:16 PM Learn about SEC filing dates

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^*

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)
10/27/2025

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	10/27/2025		M		700	A	$105.88(1)	8,858	I	Fortuna Trust dated June 1, 2018
Common Stock	10/27/2025		S		700	D	$1,360(2)	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	10/27/2025		M			700	09/30/2018	04/25/2028	Common Stock	700	$0	72,800	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 - $1,360.9999. 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/ Rachel Quinlan as attorney-in-fact for Kevin Stein	10/28/2025
	** 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.