Merck & Co., Inc. — Director's Dealing 2024

May 2, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2024-04-30

Reporting Person: Guindo Chirfi (Chief Marketing Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-04-30	Stock Option (Right to Buy)	$129.22	A	29297	Acquired	2034-04-29	Common Stock (29297)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	20753.241	Direct
Common Stock-401(k) Plan	53.4868	Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through April 5, 2024 in the Merck U.S. Savings Plan, a 401(k) plan.

F3: The option vests and becomes exercisable in equal installments on 4/30/2025, 4/30/2026 and 4/30/2027.