Dalton E. Smart III - 30 Apr 2025 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Role: SVP Fin. - Global Controller
Signature: /s/ Kelly E. W. Grez, attorney-in-fact for Dalton E. Smart, III
Issuer symbol: MRK
Transactions as of: 30 Apr 2025
Net transactions value: +$46,652
Form type: 4
Filing time: 02 May 2025, 16:18:09 UTC
Previous filing: 01 May 2025
Next filing: 05 May 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Smart Dalton E. III	SVP Fin. - Global Controller	126 EAST LINCOLN AVENUE, RAHWAY	/s/ Kelly E. W. Grez, attorney-in-fact for Dalton E. Smart, III	02 May 2025	0002003375

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRK	Common Stock	Options Exercise	$39,305	+464	+6%	$84.71	8,242	30 Apr 2025	Direct
transaction	MRK	Common Stock	Tax liability	$13,469	-159	-1.9%	$84.71	8,083	30 Apr 2025	Direct
transaction	MRK	Common Stock	Options Exercise	$31,722	+381	+4.7%	$83.26	8,464	02 May 2025	Direct
transaction	MRK	Common Stock	Tax liability	$10,907	-131	-1.5%	$83.26	8,333	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	-464	-33%	$0.000000	929	30 Apr 2025	Common Stock	464		Direct	F2, F3
transaction	MRK	Restricted Stock Unit	Options Exercise	$0	-381	-50%	$0.000000	383	02 May 2025	Common Stock	381		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.