TransDigm Group (NYSE: TDG) Co-COO sells 414 shares above $1,229

Rhea-AI Filing Summary

TransDigm Group’s Co-Chief Operating Officer Joel Reiss reported selling 414 shares of common stock on July 15, 2026 in multiple open-market or private transactions at prices between $1,229.6600 and $1,233.3800 per share, pursuant to a Rule 10b5-1 trading plan.

Insider Trade Summary 10b5-1

Net Seller: 414 shares

Net Sell 4 txns

Insider Reiss Joel

Role Co-Chief Operating Officer

Sold 414 shs ($510K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	190	$1,230.0563	$234K
Sale	Common Stock F2	70	$1,231.0943	$86K
Sale	Common Stock F3	144	$1,232.3369	$177K
Sale	Common Stock	10	$1,233.38	$12K

Holdings After Transaction: Common Stock — 3,600 shares (Direct)

Footnotes (3)

1. F1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.6600 - $1,230.5400. 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. F2. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,230.8800 - $1,231.4800. 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.
3. F3. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.9900 - $1,232.8300. 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.

Key Figures

Total shares sold: 414 shares Highest reported sale price: $1,233.3800 per share Lowest price range bound: $1,229.6600 per share +2 more

5 metrics

Total shares sold 414 shares Aggregate common stock sales reported on July 15, 2026

Highest reported sale price $1,233.3800 per share Individual transaction price for a 10-share common stock sale

Lowest price range bound $1,229.6600 per share Lower end of weighted-average price range in one sale footnote

Largest single-lot sale 190 shares Common stock sale with weighted-average price $1,230.0563 per share

Transaction date 2026-07-15 Date of all reported common stock sale transactions

Key Terms

average weighted price, open market or private transaction, Common Stock

3 terms

average weighted price financial

"Price reported constitutes the <b>average weighted price</b> of shares sold."

open market or private transaction market

"Sale in <b>open market or private transaction</b>"

Common Stock financial

"security_title: <b>Common Stock</b>"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/17/2026 - 04:18 PM Accepted by SEC EDGAR 07/17/2026 - 04:17 PM Learn about SEC filing dates

FAQ

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

TransDigm’s Co-Chief Operating Officer Joel Reiss reported selling 414 shares of TransDigm common stock on July 15, 2026. The sales occurred in multiple open-market or private transactions under a Rule 10b5-1 trading plan.

How many TDG shares did Joel Reiss sell and at what price range?

Joel Reiss sold a total of 414 TransDigm (TDG) shares. The reported per-share sale prices ranged from $1,229.6600 to $1,233.3800, including several trades where the price is given as an average weighted price within stated ranges.

Were Joel Reiss’s July 15, 2026 TDG stock sales under a Rule 10b5-1 plan?

Yes. The filing’s Rule 10b5-1 checkbox is marked, indicating the 414-share TransDigm stock sale on July 15, 2026 was executed pursuant to a pre-arranged trading plan, rather than being a discretionary, ad hoc transaction.

What is Joel Reiss’s role at TransDigm Group (TDG) in this insider report?

The reporting person, Joel Reiss, serves as Co-Chief Operating Officer of TransDigm Group. The Form 4 shows his role as an officer but not a director or 10% owner, and reports his direct ownership transactions in TransDigm common stock.

How are the sale prices reported for Joel Reiss’s TDG stock transactions?

Some sale prices are stated as an average weighted price, with shares sold at varying prices within disclosed ranges, such as $1,229.6600–$1,230.5400. The insider undertakes to provide full price breakdowns to regulators, the issuer, or shareholders upon request.

What types of transactions did Joel Reiss use to sell his TDG shares?

All reported trades are sales of common stock coded “S,” described as sales in open market or private transactions. There are no option exercises, gifts, or tax-withholding entries; the activity is solely direct sales totaling 414 shares.

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 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/15/2026		S		190	D	$1,230.0563(1)	3,824	D
Common Stock	07/15/2026		S		70	D	$1,231.0943(2)	3,754	D
Common Stock	07/15/2026		S		144	D	$1,232.3369(3)	3,610	D
Common Stock	07/15/2026		S		10	D	$1,233.38	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

Explanation of Responses:

1. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,229.6600 - $1,230.5400. 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 $1,230.8800 - $1,231.4800. 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.

3. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $1,231.9900 - $1,232.8300. 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.

Remarks:

Due to a 30-line item limitation in Table 1, this is the second of two Form 4s filed by the reporting person for this transaction.

	/s/ Rachel L. Quinlan as attorney in fact for Joel Reiss	07/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)