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

May 6, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2024-05-04

Reporting Person: Klobuchar Michael A (EVP - Chief Strategy Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-05-04	Common Stock	M	887	$127.51	Acquired	24058.195	Direct
2024-05-04	Common Stock	F	437	$127.51	Disposed	23621.195	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-05-04	Restricted Stock Unit	$	M	887	Disposed	2024-05-04	Common Stock (887)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	6.292	Indirect
Common Stock	6.292	Indirect
Common Stock - 401(k) Plan	866.5359	Indirect
Common Stock - 401(k) Plan	697.4925	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: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F4: These restricted stock units vested and were distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.