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

TransDigm Group (NYSE: TDG) COO sells 3,900 shares after option exercise

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(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

TransDigm Group reports that Co-Chief Operating Officer Joel Reiss exercised 3,900 stock options at $284.9700 per share into common stock on June 15, 2026, then sold 3,900 common shares in multiple trades at prices within $1,268.6100–$1,288.0400 per share. Following these transactions, he directly holds 3,600 common shares.

Positive

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Insider Reiss Joel
Role Co-Chief Operating Officer
Sold 3,900 shs ($4.98M)
Approx. gross sale proceeds $4.98M
Approx. exercise cost $1.11M
Approx. pre-tax spread $3.87M
Type Security Shares Price Value
Exercise Stock Option 3,900 $0.00 $0.00
Exercise Common Stock 3,900 $284.97 $1.11M
Sale Common Stock 32 $1,268.8672 $41K
Sale Common Stock 58 $1,270.0216 $74K
Sale Common Stock 146 $1,271.2884 $186K
Sale Common Stock 174 $1,272.381 $221K
Sale Common Stock 300 $1,273.3296 $382K
Sale Common Stock 600 $1,274.3513 $765K
Sale Common Stock 502 $1,275.3522 $640K
Sale Common Stock 428 $1,276.4231 $546K
Sale Common Stock 494 $1,277.4302 $631K
Sale Common Stock 316 $1,278.5335 $404K
Sale Common Stock 158 $1,279.5528 $202K
Sale Common Stock 152 $1,280.4969 $195K
Sale Common Stock 150 $1,281.8413 $192K
Sale Common Stock 90 $1,282.6004 $115K
Sale Common Stock 136 $1,283.7266 $175K
Sale Common Stock 74 $1,285.0378 $95K
Sale Common Stock 60 $1,285.9033 $77K
Sale Common Stock 30 $1,287.5867 $39K
Holdings After Transaction: Stock Option — 15,800 shares (Direct); Common Stock — 3,600 shares (Direct)
Footnotes (18)
  1. F1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,268.6100 - $1,269.3500. 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. F10. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,277.9900 - $1,278.8700. 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. F11. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,279.0400 - $1,280.0200. 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.
  4. F12. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,280.0900 - $1,280.9800. 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. F13. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,281.2600 - $1,282.1700. 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.
  6. F14. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,282.3000 - $1,283.2400. 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. F15. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,283.4400 - $1,284.2000. 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. F16. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,284.4700 - $1,285.2000. 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. F17. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,285.7500 - $1,285.9400. 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. F18. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,287.3600 - $1,288.0400. 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. F2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,269.6350 - $1,270.4900. 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. F3. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,270.7400 - $1,271.7100. 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. F4. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,271.7400 - $1,272.6100. 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. F5. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,272.9100 - $1,273.8900. 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. F6. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,273.9200 - $1,274.8900. 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. F7. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,274.9400 - $1,275.9350. 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. F8. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,275.9400 - $1,276.8500. 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. F9. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,276.9800 - $1,277.9700. 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.
Options exercised 3900.0000 shares at $284.9700 per share Stock options exercised into common stock on June 15, 2026
Shares sold 3900.0000 common shares Total common shares sold across multiple transactions on June 15, 2026
Post-transaction holding 3,600 common shares Direct common stock position after reported transactions
Option exercise price $284.9700 per share Exercise price of stock option converted into 3,900 common shares
Lowest reported sale price $1,268.6100 per share Lower end of weighted-average price range for reported share sales
Highest reported sale price $1,288.0400 per share Upper end of weighted-average price range for reported share sales
Transactions classified as sales 18 Number of separate non-derivative sale transactions reported
Derivative exercises 1 transaction / 3900 shares Single derivative (stock option) exercise reported in Form 4
Stock Option financial
"security_title: Stock Option"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
average weighted price financial
"Price reported constitutes the average weighted price of shares sold."
Sale in open market or private transaction financial
"Sale in open market or private transaction"

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FAQ

What insider activity did TransDigm (TDG) report for Joel Reiss?
TransDigm reported that Co-Chief Operating Officer Joel Reiss exercised 3,900 stock options at $284.9700 per share and sold 3,900 common shares on June 15, 2026, ending with a direct holding of 3,600 shares.

How many TransDigm (TDG) options did Joel Reiss exercise and at what price?
Joel Reiss exercised 3,900 stock options into common stock at an exercise price of $284.9700 per share. These options were originally granted as a derivative security and were exercised on June 15, 2026.

How many TransDigm (TDG) shares did Joel Reiss sell and at what price range?
Joel Reiss sold 3,900 common shares of TransDigm in multiple trades at weighted-average prices within a range of $1,268.6100 to $1,288.0400 per share, as disclosed in the accompanying price footnotes.

What is Joel Reiss’s remaining TransDigm (TDG) shareholding after these trades?
After these transactions, Joel Reiss directly holds 3,600 common shares of TransDigm. This post-transaction balance reflects the exercised options and subsequent sales reported in the Form 4 and the canonical holdings disclosure.

Were the TransDigm (TDG) sales by Joel Reiss part of a Rule 10b5-1 plan?
The filing’s Rule 10b5-1 checkbox is not marked as affirming a trading plan (aff_10b5_one is false). The disclosure does not state that these transactions were executed pursuant to a pre-arranged Rule 10b5-1 trading plan.

What type of security did Joel Reiss exercise in the TransDigm (TDG) Form 4?
Joel Reiss exercised a Stock Option derivative security into 3,900 shares of common stock. The option carried an exercise price of $284.9700 per share and an expiration date of November 8, 2027.
SEC Form 4
FORM 4UNITED 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*
Reiss Joel
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Co-Chief Operating Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/15/2026M3,900A$284.977,500D
Common Stock06/15/2026S32D$1,268.8672(1)7,468D
Common Stock06/15/2026S58D$1,270.0216(2)7,410D
Common Stock06/15/2026S146D$1,271.2884(3)7,264D
Common Stock06/15/2026S174D$1,272.381(4)7,090D
Common Stock06/15/2026S300D$1,273.3296(5)6,790D
Common Stock06/15/2026S600D$1,274.3513(6)6,190D
Common Stock06/15/2026S502D$1,275.3522(7)5,688D
Common Stock06/15/2026S428D$1,276.4231(8)5,260D
Common Stock06/15/2026S494D$1,277.4302(9)4,766D
Common Stock06/15/2026S316D$1,278.5335(10)4,450D
Common Stock06/15/2026S158D$1,279.5528(11)4,292D
Common Stock06/15/2026S152D$1,280.4969(12)4,140D
Common Stock06/15/2026S150D$1,281.8413(13)3,990D
Common Stock06/15/2026S90D$1,282.6004(14)3,900D
Common Stock06/15/2026S136D$1,283.7266(15)3,764D
Common Stock06/15/2026S74D$1,285.0378(16)3,690D
Common Stock06/15/2026S60D$1,285.9033(17)3,630D
Common Stock06/15/2026S30D$1,287.5867(18)3,600D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option$284.9706/15/2026M3,90009/30/202111/08/2027Common Stock3,900$0.0015,800D
Explanation of Responses:
1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,268.6100 - $1,269.3500. 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 $1,269.6350 - $1,270.4900. 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 $1,270.7400 - $1,271.7100. 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 $1,271.7400 - $1,272.6100. 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 $1,272.9100 - $1,273.8900. 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 $1,273.9200 - $1,274.8900. 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 $1,274.9400 - $1,275.9350. 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 $1,275.9400 - $1,276.8500. 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 $1,276.9800 - $1,277.9700. 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 $1,277.9900 - $1,278.8700. 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 $1,279.0400 - $1,280.0200. 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.
12. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,280.0900 - $1,280.9800. 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 $1,281.2600 - $1,282.1700. 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.
14. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,282.3000 - $1,283.2400. 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 $1,283.4400 - $1,284.2000. 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 $1,284.4700 - $1,285.2000. 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 $1,285.7500 - $1,285.9400. 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 $1,287.3600 - $1,288.0400. 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.
Remarks:
/s/ Rachel L. Quinlan as attorney in fact for Joel Reiss06/16/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR