Merck & Co., Inc. — Director's Dealing 2023

May 4, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2023-05-02

Reporting Person: Romanelli Joseph (President, Human Health Int?l)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-05-02	Stock Option (Right to Buy)	$117.89	A	23513	Acquired	2033-05-01	Common Stock (23513)	Direct
2023-05-02	Restricted Stock Unit	$	A	6786	Acquired	2026-05-02	Common Stock (6786)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	20284.325	Direct

Footnotes

F1: The option vests and becomes exercisable in equal installments on 5/2/2024, 5/2/2025 and 5/2/2026.

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 5/2/2024, 5/2/2025 and 5/2/2026.