[Form 4] TransDigm Group INC Insider Trading Activity

Rhea-AI Filing Summary

TransDigm Group Inc. (TDG) director Michele Santana received 29 shares of common stock on 09/19/2025 as payment under the company's Director Share Plan. The filing states the shares were issued in lieu of a semi-annual director fee and were valued at $1,288.13. After the transaction Ms. Santana beneficially owned 741 shares, held directly. The Form 4 was signed by an attorney-in-fact on 09/22/2025 and indicates the issuance followed the plan's fair market value provisions.

Positive

• Director compensation settled in company stock, which can align director and shareholder interests
• Transaction disclosed promptly via Form 4 with clear reporting of shares acquired, value, and resulting ownership

Negative

• No negative items explicitly disclosed in the filing

Insights

Corporate Governance Expert

TL;DR: Director received equity under the Director Share Plan, aligning compensation with shareholders without cash payout.

This Form 4 documents a routine grant or issuance of 29 common shares to a director in lieu of a semi-annual cash fee, valued at $1,288.13. The shares are held directly and bring the director's total reported beneficial ownership to 741 shares. The filing cites the Director Share Plan and fair market valuation; there are no indications of related-party transactions beyond normal director compensation, nor any amendments or derivative activity reported.

Securities Analyst

TL;DR: A small, routine insider equity issuance was reported; transaction size appears immaterial to investors.

The report shows an acquisition code 'A' for non-derivative common stock on 09/19/2025 consisting of 29 shares at a listed aggregate value of $1,288.13, resulting in 741 shares beneficially owned. This is presented as a director fee election under the company plan. No disposals, options, or other filings are included, and the Form 4 was executed by an attorney-in-fact on 09/22/2025.

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

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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).

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^*

Santana Michele

(Last) (First) (Middle)

3469 AEGEAN RD

(Street)

AKRON OH 44333

(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)
09/19/2025

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	09/19/2025		A		29(1)	A	$1,288.13	741	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

Explanation of Responses:

1. Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan.

	/s/ Gabrielle Feuer as attorney-in-fact	09/22/2025
	** 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 Michele Santana report on the Form 4 for TDG?

The Form 4 reports that Michele Santana acquired 29 shares of TransDigm common stock on 09/19/2025 under the Director Share Plan.

How much were the shares valued at in the TDG Form 4?

The 29 shares were reported with an aggregate value of $1,288.13.

How many TDG shares does Michele Santana beneficially own after the transaction?

Following the transaction, Michele Santana beneficially owned 741 shares, held directly.

Why were the shares issued to Michele Santana according to the filing?

The filing states the shares were issued as receipt of stock in lieu of payment of a semi-annual director fee under the Director Share Plan.

When was the Form 4 for this TDG transaction signed and filed?

The signature on the Form 4 is dated 09/22/2025, executed by an attorney-in-fact.