TransDigm (NYSE: TDG) COO Joel Reiss sells 3,900 shares after exercise

Rhea-AI Filing Summary

TransDigm Group Co‑Chief Operating Officer Joel Reiss exercised stock options for 3,900 shares of common stock at an exercise price of $284.97 per share and received the underlying shares on February 17, 2026.

On the same day, he sold 3,900 TransDigm common shares in multiple open‑market transactions at prices generally between about $1,279 and $1,305 per share. After these trades, Reiss directly holds 3,600 shares of common stock and 31,400 stock options.

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

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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)
02/17/2026

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	02/17/2026		M		3,900	A	$284.97	7,500	D
Common Stock	02/17/2026		S		27	D	$1,279.6759(1)	7,473	D
Common Stock	02/17/2026		S		113	D	$1,280.7198(2)	7,360	D
Common Stock	02/17/2026		S		99	D	$1,282.4372(3)	7,261	D
Common Stock	02/17/2026		S		71	D	$1,283.2217(4)	7,190	D
Common Stock	02/17/2026		S		120	D	$1,284.7131(5)	7,070	D
Common Stock	02/17/2026		S		120	D	$1,286.0584(6)	6,950	D
Common Stock	02/17/2026		S		106	D	$1,287.1589(7)	6,844	D
Common Stock	02/17/2026		S		104	D	$1,287.9878(8)	6,740	D
Common Stock	02/17/2026		S		140	D	$1,289.1044(9)	6,600	D
Common Stock	02/17/2026		S		140	D	$1,290.2191(10)	6,460	D
Common Stock	02/17/2026		S		182	D	$1,291.1091(11)	6,278	D
Common Stock	02/17/2026		S		214	D	$1,292.3522(12)	6,064	D
Common Stock	02/17/2026		S		361	D	$1,293.2128(13)	5,703	D
Common Stock	02/17/2026		S		172	D	$1,294.3065(14)	5,531	D
Common Stock	02/17/2026		S		266	D	$1,295.5022(15)	5,265	D
Common Stock	02/17/2026		S		248	D	$1,296.6274(16)	5,017	D
Common Stock	02/17/2026		S		326	D	$1,297.4893(17)	4,691	D
Common Stock	02/17/2026		S		392	D	$1,298.7391(18)	4,299	D
Common Stock	02/17/2026		S		220	D	$1,299.5555(19)	4,079	D
Common Stock	02/17/2026		S		330	D	$1,300.9067(20)	3,749	D
Common Stock	02/17/2026		S		29	D	$1,302.4138(21)	3,720	D
Common Stock	02/17/2026		S		50	D	$1,303.9852(22)	3,670	D
Common Stock	02/17/2026		S		70	D	$1,305.2806(23)	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	02/17/2026		M			3,900	09/30/2021	11/08/2027	Common Stock	3,900	$0	31,400	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 $1,279.3400 - $1,280.3100. 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 $1,280.3500 - $1,281.1200. 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 $1,281.9100 - $1,282.8900. 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.

4. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,283.0900 - $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.

5. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,284.3000 - $1,285.2300. 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.

6. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,285.5900 - $1,286.4800. 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.

7. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,286.6100 - $1,287.5600. 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 $1,287.6200 - $1,288.5500. 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 $1,288.7000 - $1,289.4200. 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 $1,289.7000 - $1,290.6300. 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 $1,290.7500 - $1,291.6500. 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 $1,291.8700 - $1,292.8600. 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 $1,292.9000 - $1,293.7800. 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.

14. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,293.9000 - $1,294.8300. 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 $1,294.9800 - $1,295.9400. 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.

16. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,296.0800 - $1,297.0700. 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 $1,297.1700 - $1,298.0500. 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 $1,298.2500 - $1,299.1700. 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.

19. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,299.2500 - $1,300.0800. 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.

20. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,300.2800 - $1,301.1900. 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.

21. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,302.2000 - $1,302.5200. 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.

22. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,303.7400 - $1,304.4100. 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.

23. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,305.0800 - $1,305.6200. 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	02/18/2026
	** 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.

FAQ

What insider transactions did TransDigm (TDG) executive Joel Reiss report?

Joel Reiss reported exercising stock options for 3,900 TransDigm shares, then selling 3,900 common shares in multiple open‑market trades. These transactions occurred on February 17, 2026, and reflect both an option exercise and a same‑day sale of the acquired stock.

At what prices did Joel Reiss sell TransDigm (TDG) shares in this Form 4?

Reiss sold 3,900 TransDigm common shares in numerous open‑market trades at prices generally ranging from about $1,279 to $1,305 per share. Reported prices are weighted averages, with detailed trade‑by‑trade prices available upon request as noted in the filing footnotes.

How many TransDigm (TDG) shares does Joel Reiss own after these transactions?

After the reported transactions, Reiss directly owns 3,600 shares of TransDigm common stock. He also holds 31,400 stock options following the option exercise, according to the post‑transaction ownership balances disclosed in the Form 4 data.

What type of derivative transaction did TransDigm (TDG) COO Joel Reiss execute?

Reiss executed an option exercise, classified as an exercise or conversion of a derivative security. He exercised 3,900 stock options at an exercise price of $284.97 per share, receiving 3,900 TransDigm common shares before subsequently selling the same number of shares.

Were Joel Reiss’s TransDigm (TDG) share sales open‑market transactions?

Yes. Each sale of TransDigm common stock reported in this Form 4 is coded as an open‑market or private sale transaction. The filing specifies multiple open‑market trades on February 17, 2026, with weighted average sale prices disclosed for grouped transaction ranges.

Does this TransDigm (TDG) Form 4 show net buying or selling by Joel Reiss?

The Form 4 reflects net selling of common stock. Reiss exercised options to acquire 3,900 shares, then sold 3,900 shares in open‑market trades the same day, leaving his direct common‑stock holdings at 3,600 shares after the reported transactions.