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TransDigm (NYSE: TDG) Co-COO details option exercise and share sales

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

Rhea-AI Filing Summary

TransDigm Group’s Co-Chief Operating Officer Joel Reiss reported an insider transaction involving stock options and common shares on January 15, 2026. He exercised 3,900 stock options at an exercise price of $284.97 per share, receiving the same number of TransDigm common shares. On the same date, he sold common stock in a series of small trades, each reported with an average weighted sale price, at levels ranging from about $1,420 to $1,439 per share. After these transactions, he directly owned 3,600 shares of TransDigm common stock and 35,300 stock options. The footnotes clarify that each reported sale price is a weighted average, with full price breakdowns available to regulators or shareholders on request.

Positive

  • None.

Negative

  • None.
Insider Reiss Joel
Role Co-Chief Operating Officer
Sold 3,900 shs ($5.58M)
Type Security Shares Price Value
Exercise Stock Option 3,900 $0.00 --
Exercise Common Stock 3,900 $284.97 $1.11M
Sale Common Stock 44 $1,420.375 $62K
Sale Common Stock 67 $1,421.8916 $95K
Sale Common Stock 95 $1,422.628 $135K
Sale Common Stock 128 $1,423.8024 $182K
Sale Common Stock 90 $1,425.104 $128K
Sale Common Stock 245 $1,426.3497 $349K
Sale Common Stock 396 $1,427.2718 $565K
Sale Common Stock 477 $1,428.0254 $681K
Sale Common Stock 260 $1,429.1449 $372K
Sale Common Stock 372 $1,430.2077 $532K
Sale Common Stock 453 $1,431.2593 $648K
Sale Common Stock 257 $1,432.3994 $368K
Sale Common Stock 486 $1,433.3583 $697K
Sale Common Stock 200 $1,434.177 $287K
Sale Common Stock 205 $1,435.1371 $294K
Sale Common Stock 35 $1,436.1486 $50K
Sale Common Stock 50 $1,437.5608 $72K
Sale Common Stock 40 $1,438.9075 $58K
Holdings After Transaction: Stock Option — 35,300 shares (Direct); Common Stock — 7,500 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 $1,420.0100 - $1,420.9900. 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 $1,421.1300 - $1,422.0800. 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 $1,422.2800 - $1,423.1700. 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 $1,423.4100 - $1,424.4000. 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 $1,424.4600 - $1,425.3400. 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 $1,425.7100 - $1,426.6800. 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 $1,426.7300 - $1,427.7200. 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 $1,427.7400 - $1,428.7200. 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 $1,428.7700 - $1,429.7200. 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 $1,429.8000 - $1,430.7500. 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 $1,430.8000 - $1,431.7800. 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 $1,431.8500 - $1,432.8400. 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 $1,432.8500 - $1,433.7400. 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 $1,433.8500 - $1,434.5100. 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 $1,434.8800 - $1,435.8400. 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 $1,435.9000 - $1,436.3300. 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 $1,436.9500 - $1,437.7600. 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 $1,438.8500 - $1,439.0800. 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.
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)
01/15/2026
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 01/15/2026 M 3,900 A $284.97 7,500 D
Common Stock 01/15/2026 S 44 D $1,420.375(1) 7,456 D
Common Stock 01/15/2026 S 67 D $1,421.8916(2) 7,389 D
Common Stock 01/15/2026 S 95 D $1,422.628(3) 7,294 D
Common Stock 01/15/2026 S 128 D $1,423.8024(4) 7,166 D
Common Stock 01/15/2026 S 90 D $1,425.104(5) 7,076 D
Common Stock 01/15/2026 S 245 D $1,426.3497(6) 6,831 D
Common Stock 01/15/2026 S 396 D $1,427.2718(7) 6,435 D
Common Stock 01/15/2026 S 477 D $1,428.0254(8) 5,958 D
Common Stock 01/15/2026 S 260 D $1,429.1449(9) 5,698 D
Common Stock 01/15/2026 S 372 D $1,430.2077(10) 5,326 D
Common Stock 01/15/2026 S 453 D $1,431.2593(11) 4,873 D
Common Stock 01/15/2026 S 257 D $1,432.3994(12) 4,616 D
Common Stock 01/15/2026 S 486 D $1,433.3583(13) 4,130 D
Common Stock 01/15/2026 S 200 D $1,434.177(14) 3,930 D
Common Stock 01/15/2026 S 205 D $1,435.1371(15) 3,725 D
Common Stock 01/15/2026 S 35 D $1,436.1486(16) 3,690 D
Common Stock 01/15/2026 S 50 D $1,437.5608(17) 3,640 D
Common Stock 01/15/2026 S 40 D $1,438.9075(18) 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 01/15/2026 M 3,900 09/30/2021 11/08/2027 Common Stock 3,900 $0 35,300 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 $1,420.0100 - $1,420.9900. 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.
2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,421.1300 - $1,422.0800. 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 $1,422.2800 - $1,423.1700. 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 $1,423.4100 - $1,424.4000. 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 $1,424.4600 - $1,425.3400. 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 $1,425.7100 - $1,426.6800. 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 $1,426.7300 - $1,427.7200. 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 $1,427.7400 - $1,428.7200. 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 $1,428.7700 - $1,429.7200. 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.
10. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,429.8000 - $1,430.7500. 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.
11. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,430.8000 - $1,431.7800. 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.
12. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,431.8500 - $1,432.8400. 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.
13. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,432.8500 - $1,433.7400. 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.
14. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,433.8500 - $1,434.5100. 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.
15. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,434.8800 - $1,435.8400. 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.
16. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,435.9000 - $1,436.3300. 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.
17. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,436.9500 - $1,437.7600. 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.
18. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,438.8500 - $1,439.0800. 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 01/16/2026
** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did TransDigm (TDG) report for Joel Reiss?

The filing shows Co-Chief Operating Officer Joel Reiss exercised 3,900 stock options and sold TransDigm common shares in multiple trades on January 15, 2026.

How many TransDigm stock options did Joel Reiss exercise in this Form 4?

He exercised 3,900 stock options at an exercise price of $284.97 per share, receiving 3,900 shares of TransDigm common stock.

At what prices did Joel Reiss sell TransDigm (TDG) common stock?

The sales were reported at weighted average prices, with individual trades in ranges between roughly $1,420.01 and $1,439.08 per share, as detailed in the footnotes.

How many TransDigm shares does Joel Reiss own after the reported transactions?

Following the transactions, Joel Reiss directly owned 3,600 shares of TransDigm common stock.

How many TransDigm stock options does Joel Reiss hold after this Form 4 transaction?

After exercising 3,900 options, he held 35,300 stock options beneficially owned on a direct basis.

What do the weighted average price footnotes in the TransDigm Form 4 mean?

Each sale line shows a weighted average price, with the footnotes stating that shares were sold at various prices within a given range. Full trade-level price details are available to the SEC, the issuer, or any security holder upon request.