TransDigm CEO buys 950 shares of common stock

TransDigm Group president and CEO Michael Lisman bought 950 shares of TransDigm common stock on February 6, 2026 at $1,284.2608 per share, increasing his directly held stake to 3,259 shares.

Rhea-AI Filing Summary

TransDigm Group president and CEO Michael Lisman bought 950 shares of TransDigm common stock on February 6, 2026 at $1,284.2608 per share, increasing his directly held stake to 3,259 shares. He also beneficially owns 1,954 shares indirectly through the Michael Lisman Declaration of Trust dated January 31, 2023.

A note clarifies that a Form 4 filed on November 14, 2025 mistakenly duplicated the 1,954 trust shares, and confirms that 1,954 is the correct number of shares held indirectly in the trust.

Insider Trade Summary

Net Buyer: 950 shares

Net Buy 2 txns

Insider Lisman Michael

Role President & CEO

Bought 950 shs ($1.22M)

Type	Security	Shares	Price	Value
Purchase	Common Stock	950	$1,284.2608	$1.22M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 3,259 shares (Direct); Common Stock — 1,954 shares (Indirect, Michael Lisman Declaration of Trust dated January 31, 2023)

Footnotes (1)

1. F1. Form 4 filed on 11/14/2025 showed an extra line, duplicating the holding of 1,954 shares. Confirming that the correct number of shares held indirectly in trust is 1,954.

FAQ

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What did TransDigm (TDG) CEO Michael Lisman report in this Form 4 filing?

TransDigm (TDG) president and CEO Michael Lisman reported buying 950 shares of TransDigm common stock on February 6, 2026 at $1,284.2608 per share, and disclosed updated direct and indirect share holdings, including shares held through a trust.

How many TransDigm (TDG) shares did CEO Michael Lisman buy on February 6, 2026?

On February 6, 2026, CEO Michael Lisman purchased 950 shares of TransDigm common stock at a price of $1,284.2608 per share. This reported open-market purchase increased his directly held ownership position in TransDigm shares.

What is Michael Lisman’s reported TransDigm (TDG) share ownership after this transaction?

After the reported transaction, CEO Michael Lisman beneficially owns 3,259 TransDigm shares directly. In addition, a trust associated with him, the Michael Lisman Declaration of Trust dated January 31, 2023, holds 1,954 shares beneficially on an indirect basis.

How are Michael Lisman’s TransDigm (TDG) shares held, directly or indirectly?

CEO Michael Lisman holds 3,259 TransDigm shares directly, as reported following the February 6, 2026 purchase. He also has 1,954 shares held indirectly through the Michael Lisman Declaration of Trust dated January 31, 2023, reflecting beneficial ownership via that trust.

What correction to prior reporting does this Form 4 make for TransDigm (TDG)?

The filing explains that a Form 4 filed November 14, 2025 mistakenly showed an extra line duplicating the 1,954 trust shares. This report clarifies that the correct number of shares held indirectly in the trust is 1,954, eliminating the prior duplication.

Who signed the Form 4 for TransDigm (TDG) CEO Michael Lisman?

The Form 4 was signed by /s/ Rachel L. Quinlan acting as attorney-in-fact for Michael Lisman. This indicates that Quinlan executed the filing under a power of attorney authorizing her to sign SEC ownership reports on Lisman’s behalf.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/09/2026 - 04:30 PM EST 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).

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^*

Lisman Michael

(Last) (First) (Middle)

1350 EUCLID AVENUE

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
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

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	02/06/2026		P		950	A	$1,284.2608	3,259	D
Common Stock								1,954(1)	I	Michael Lisman Declaration of Trust dated January 31, 2023

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. Form 4 filed on 11/14/2025 showed an extra line, duplicating the holding of 1,954 shares. Confirming that the correct number of shares held indirectly in trust is 1,954.

	/s/ Rachel L. Quinlan as attorney in fact for Michael Lisman	02/09/2026
	** 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.