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

May 3, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2023-05-01

Reporting Person: Oosthuizen Johannes Jacobus (President, U.S. Market)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-05-01	Common Stock	M	866	$115.47	Acquired	19726.748	Direct
2023-05-01	Common Stock	F	427	$115.47	Disposed	19299.748	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-05-01	Restricted Stock Unit	$	M	866	Disposed	2023-05-01	Common Stock (866)	Direct

Footnotes

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 5/1/2021, 5/1/2022 and 5/1/2023.