TransMedics Group (TMDX) director exercises options and sells 3,571 shares

Rhea-AI Filing Summary

TransMedics Group, Inc. director David Weill reported an option exercise and related share sale. On March 4, 2026, he exercised a stock option for 3,571 shares of common stock at $14.20 per share after the derivative security was fully vested. He then sold 3,571 shares of common stock in an open-market transaction at a price of $146.82 per share. After these transactions, he directly owned 12,134 shares of common stock and held 1,429 stock option 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

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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).

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^*

Weill David

(Last) (First) (Middle)

C/O TRANSMEDICS GROUP, INC.

200 MINUTEMAN ROAD

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TransMedics Group, Inc. [ TMDX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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	03/04/2026		M		3,571	A	$14.2	15,705	D
Common Stock	03/04/2026		S		3,571	D	$146.82	12,134	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 (Right to Buy)	$14.2	03/04/2026		M			3,571	(1)	06/04/2030	Common Stock	3,571	$0.00	1,429	D

Explanation of Responses:

1. The option is fully vested.

	By: /s/ Gerardo Hernandez, Attorney-in-Fact	03/06/2026
	** 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.
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FAQ

What did TransMedics (TMDX) director David Weill report in this Form 4?

David Weill reported exercising a stock option and selling shares. He acquired 3,571 shares of TransMedics common stock through an option exercise and sold 3,571 shares in an open-market transaction on March 4, 2026.

How many TransMedics (TMDX) shares did David Weill sell and at what price?

David Weill sold 3,571 shares of TransMedics common stock. The reported sale price was $146.82 per share in an open-market or private transaction classified under transaction code "S" on March 4, 2026.

What stock option activity did David Weill report for TransMedics (TMDX)?

He reported exercising a fully vested stock option for 3,571 shares. The shares were acquired at an exercise price of $14.20 per share through a derivative exercise/conversion classified under transaction code "M" on March 4, 2026.

How many TransMedics (TMDX) shares does David Weill own after these transactions?

Following the reported transactions, David Weill directly owned 12,134 shares of TransMedics common stock. He also held 1,429 shares underlying stock options after exercising part of his previously granted option award.

Was the TransMedics (TMDX) stock option held by David Weill vested?

Yes. A footnote states that the option is fully vested. This means the entire option grant was exercisable when he chose to convert 3,571 option shares into TransMedics common stock on March 4, 2026.