Dean Y. Li - 29 Apr 2025 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Role: Executive VP & President, MRL
Signature: /s/ Kelly E. W. Grez as Attorney-in-Fact for Dean Y. Li
Issuer symbol: MRK
Transactions as of: 29 Apr 2025
Net transactions value: $0
Form type: 4
Filing time: 01 May 2025, 18:04:29 UTC
Previous filing: 03 Apr 2025
Next filing: 23 Jun 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	MRK	Common Stock						80,181	29 Apr 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	Award	$0	+14,166		$0.000000	14,166	29 Apr 2025	Common Stock	14,166		Direct	F2, F3
transaction	MRK	Stock Option (Right to Buy)	Award	$0	+64,481		$0.000000	64,481	29 Apr 2025	Common Stock	64,481	$84.71	Direct	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 4/29/2026, 4/29/2027 and 4/29/2028.
F4	The option vests and becomes exercisable in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028.