TransDigm director granted 34 shares as fee

TransDigm director Jane M. Cronin received stock instead of a semi-annual cash director fee, modestly increasing her direct holdings.

Rhea-AI Filing Summary

TransDigm Group INC (symbol: TDG) is the issuer of record for a Form 4 filing submitted to the SEC. CRONIN JANE M. reported acquisition or exercise transactions in this Form 4 filing.

TransDigm Group INC (TDG) reported that director Jane M. Cronin received a grant of 34 shares of Common Stock on September 18, 2026, at a reported fair market value of $1,085.00 per share. The shares were received in lieu of a semi-annual director fee under the company’s Director Share Plan, and her directly held stake increased to 733.62 shares. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Grant/Award: 34 shares

Grant/Award 1 txn

Insider CRONIN JANE M.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	34	$1,085.00	$37K

Holdings After Transaction: Common Stock — 733.62 shares (Direct)

Footnotes (1)

1. F1. Receipt of stock in lieu of payment of semi-annual director fee, based on fair market value in accordance with the Director Share Plan.

Key Figures

Shares acquired: 34 shares Grant fair market value per share: $1,085.00 per share Shares owned after transaction: 733.62 shares

3 metrics

Shares acquired 34 shares Grant of Common Stock to director Jane M. Cronin on September 18, 2026

Grant fair market value per share $1,085.00 per share Value used to determine stock in lieu of semi-annual director fee

Shares owned after transaction 733.62 shares Direct holdings of Jane M. Cronin following the grant

Key Terms

Director Share Plan, semi-annual director fee, fair market value

3 terms

Director Share Plan financial

"based on fair market value in accordance with the Director Share Plan"

semi-annual director fee financial

"Receipt of stock in lieu of payment of semi-annual director fee"

fair market value financial

"based on fair market value in accordance with the Director Share Plan"

The price a willing buyer and a willing seller would agree on for an asset or security when neither is under pressure and both have access to the same information. Think of it as the market’s neutral estimate of what something is worth, like the price two neighbors would settle on for a car after comparing similar listings. Investors care because fair market value guides buying and selling decisions, tax reporting, portfolio valuation, and how accurately company assets are reflected in financial statements.

FAQ

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

What insider transaction did TDG report for Jane M. Cronin?

TransDigm reported that director Jane M. Cronin received 34 shares of Common Stock on September 18, 2026 as a grant or award. The shares were issued instead of paying her semi-annual director fee in cash under the Director Share Plan.

At what price were the TDG shares granted to Jane M. Cronin?

The 34 TransDigm (TDG) shares were valued at a reported $1,085.00 per share, based on fair market value in accordance with the company’s Director Share Plan for payment of the semi-annual director fee in stock.

How many TDG shares does Jane M. Cronin hold after this transaction?

After receiving 34 shares, director Jane M. Cronin directly holds 733.62 shares of TransDigm Common Stock. This figure reflects her direct ownership position following the September 18, 2026 grant in lieu of a semi-annual director fee.

Was the TDG insider transaction made under a Rule 10b5-1 plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported for this transaction. The grant represents stock received as compensation in lieu of a semi-annual director fee under the Director Share Plan.

What is the nature of the TDG stock received by Jane M. Cronin?

The 34 TDG shares represent receipt of stock in lieu of payment of a semi-annual director fee, based on fair market value in accordance with TransDigm’s Director Share Plan, rather than an open-market purchase or sale.

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

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Available on EDGAR 09/21/2026 - 04:09 PM Accepted by SEC EDGAR 09/21/2026 - 04:08 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).

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^*

CRONIN JANE M.

(Last) (First) (Middle)

1350 EUCLID AVE

SUITE 1600

(Street)

CLEVELAND OHIO 44115

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/18/2026		A		34(1)	A	$1,085	733.62	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.

Remarks:

	/s/ Rachel L. Quinlan as attorney in fact for Jane Cronin	09/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)