Joseph Romanelli - 30 Apr 2025 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Role: President, Human Health Int?l
Signature: /s/ Kelly E. W. Grez, attorney-in-fact for Joseph Romanelli
Issuer symbol: MRK
Transactions as of: 30 Apr 2025
Net transactions value: +$184,106
Form type: 4
Filing time: 02 May 2025, 16:14:57 UTC
Previous filing: 02 May 2025
Next filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Romanelli Joseph	President, Human Health Int?l	MERCK & CO., INC., 126 EAST LINCOLN AVENUE, RAHWAY	/s/ Kelly E. W. Grez, attorney-in-fact for Joseph Romanelli	02 May 2025	0001938322

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRK	Common Stock	Options Exercise	$174,757	+2,063	+9.9%	$84.71	22,816	30 Apr 2025	Direct
transaction	MRK	Common Stock	Tax liability	$86,150	-1,017	-4.5%	$84.71	21,799	30 Apr 2025	Direct
transaction	MRK	Common Stock	Options Exercise	$188,334	+2,262	+10%	$83.26	24,061	02 May 2025	Direct
transaction	MRK	Common Stock	Tax liability	$92,835	-1,115	-4.6%	$83.26	22,946	02 May 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MRK	Restricted Stock Unit	Options Exercise	$0	-2,063	-33%	$0.000000	4,128	30 Apr 2025	Common Stock	2,063		Direct	F2, F3
transaction	MRK	Restricted Stock Unit	Options Exercise	$0	-2,262	-50%	$0.000000	2,262	02 May 2025	Common Stock	2,262		Direct	F2, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Holdings include shares acquired in dividend reinvestment transactions.
F2	Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.
F3	These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/30/2025, 4/30/2026 and 4/30/2027.
F4	These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/2/2024, 5/2/2025 and 5/2/2026.