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

TransDigm officer sells 3,000 shares after option exercise at $284.97

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

Rhea-AI Filing Summary

TransDigm Group (TDG): insider transaction — Co‑Chief Operating Officer Joel Reiss exercised 3,000 stock options at $284.97 and, on the same day (10/20/2025), sold 3,000 common shares in multiple open‑market trades.

The reported sales were executed in tranches priced between $1,272.04 and $1,284.00, with several weighted‑average prices disclosed. Following these transactions, Mr. Reiss reported 3,600 common shares beneficially owned directly. He also reported 47,000 derivative securities (stock options) beneficially owned, with the exercised option series having an exercise price of $284.97, first exercisable on 09/30/2021 and expiring on 11/08/2027.

Positive

  • None.

Negative

  • None.
Insider Reiss Joel
Role Co-Chief Operating Officer
Sold 3,000 shs ($3.84M)
Type Security Shares Price Value
Exercise Stock Option 3,000 $0.00 --
Exercise Common Stock 3,000 $284.97 $855K
Sale Common Stock 42 $1,272.5781 $53K
Sale Common Stock 200 $1,273.3618 $255K
Sale Common Stock 100 $1,275.00 $128K
Sale Common Stock 308 $1,276.4675 $393K
Sale Common Stock 742 $1,278.0193 $948K
Sale Common Stock 524 $1,280.4205 $671K
Sale Common Stock 200 $1,281.07 $256K
Sale Common Stock 844 $1,283.3892 $1.08M
Sale Common Stock 40 $1,283.99 $51K
Holdings After Transaction: Stock Option — 47,000 shares (Direct); Common Stock — 6,600 shares (Direct)
Footnotes (1)
  1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,272.0400 - $1,272.7400. 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 $1,273.2800 - $1,274.0600. 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 $1,276.4500 - $1,276.5000. 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 $1,277.5350 - $1,278.4800. 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 $1,280.3100 - $1,281.0100. 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 $1,282.9200 - $1,283.9100. 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 $1,283.9600 - $1,284.0000. 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.
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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*
Reiss Joel
(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)
Director 10% Owner
X Officer (give title below) Other (specify below)
Co-Chief Operating Officer
3. Date of Earliest Transaction (Month/Day/Year)
10/20/2025
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 10/20/2025 M 3,000 A $284.97 6,600 D
Common Stock 10/20/2025 S 42 D $1,272.5781(1) 6,558 D
Common Stock 10/20/2025 S 200 D $1,273.3618(2) 6,358 D
Common Stock 10/20/2025 S 100 D $1,275 6,258 D
Common Stock 10/20/2025 S 308 D $1,276.4675(3) 5,950 D
Common Stock 10/20/2025 S 742 D $1,278.0193(4) 5,208 D
Common Stock 10/20/2025 S 524 D $1,280.4205(5) 4,684 D
Common Stock 10/20/2025 S 200 D $1,281.07 4,484 D
Common Stock 10/20/2025 S 844 D $1,283.3892(6) 3,640 D
Common Stock 10/20/2025 S 40 D $1,283.99(7) 3,600 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
Stock Option $284.97 10/20/2025 M 3,000 09/30/2021 11/08/2027 Common Stock 3,000 $0 47,000 D
Explanation of Responses:
1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,272.0400 - $1,272.7400. 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.
2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,273.2800 - $1,274.0600. 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 $1,276.4500 - $1,276.5000. 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 $1,277.5350 - $1,278.4800. 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 $1,280.3100 - $1,281.0100. 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.
6. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,282.9200 - $1,283.9100. 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 $1,283.9600 - $1,284.0000. 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.
/s/ Rachel L. Quinlan as attorney in fact for Joel Reiss 10/21/2025
** 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 did TDG's Co-COO report on Form 4?

He exercised 3,000 stock options at $284.97 and sold 3,000 common shares on 10/20/2025.

What prices were the TDG share sales executed at?

The sales were reported at weighted‑average prices within $1,272.04–$1,284.00, with detailed tranches disclosed.

How many TDG shares does the reporting person own after the transactions?

He reported 3,600 common shares beneficially owned directly after the transactions.

What derivative holdings remain after the transaction?

He reported 47,000 derivative securities (stock options) beneficially owned following the transaction.

What are the key terms of the exercised TDG option?

Exercise price $284.97; first exercisable on 09/30/2021; expiration on 11/08/2027.

Were the TDG share sales split across multiple trades?

Yes. Tranches included quantities such as 42, 200, 100, 308, 742, 524, 200, 844, and 40 shares at disclosed prices.