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: Guindo Chirfi (Chief Marketing Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-05-02	Stock Option (Right to Buy)	$117.89	A	34578	Acquired	2033-05-01	Common Stock (34578)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1431.1	Direct
Common Stock-401(k) Plan	52.1484	Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through April 10, 2023 in the Merck U.S. Savings Plan, a 401(k) plan.

F3: The option vests and becomes exercisable in equal installments on 5/2/2024, 5/2/2025 and 5/2/2026.