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  4. [Form 4] TransDigm Group INC Insider Trading Activity

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

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

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.

Positive

  • None.

Negative

  • None.
Insider Stein Kevin M
Role Director
Sold 17,526 shs ($23.88M)
Type Security Shares Price Value
Exercise Stock Option 17,526 $0.00 --
Exercise Common Stock 17,526 $105.88 $1.86M
Sale Common Stock 6,910 $1,360.1483 $9.40M
Sale Common Stock 2,081 $1,361.4284 $2.83M
Sale Common Stock 1,794 $1,362.6281 $2.44M
Sale Common Stock 1,397 $1,363.3925 $1.90M
Sale Common Stock 3,139 $1,364.5755 $4.28M
Sale Common Stock 1,680 $1,365.3326 $2.29M
Sale Common Stock 495 $1,366.1918 $676K
Sale Common Stock 30 $1,367.2233 $41K
Holdings After Transaction: Stock Option — 37,940 shares (Indirect, Fortuna Trust dated June 1, 2018); Common Stock — 25,684 shares (Indirect, Fortuna Trust dated June 1, 2018)
Footnotes (1)
  1. The exercise price has been adjusted for dividends declared since August 1, 2022. 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. 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. 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. 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. 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. 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. 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. 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.
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Form 4 Insider Transactions: What Each Field Means →
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)
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).
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.

Source: View Original Filing on SEC EDGAR

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.