Merck & Co., Inc. — Director's Dealing 2022

May 5, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2022-05-03

Reporting Person: Garay Arpa (SVP Human Health Global Mktg.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-05-04	Common Stock	M	907	$87.10	Acquired	2368	Direct
2022-05-04	Common Stock	F	259	$87.10	Disposed	2109	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-05-04	Restricted Stock Unit	$	M	907	Disposed	2024-05-04	Common Stock (907)	Direct
2022-05-03	Stock Option (Right to Buy)	$87.10	A	21359	Acquired	2032-05-02	Common Stock (21359)	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 5/4/2022, 5/4/2023 and 5/4/2024.

F4: The option vests and becomes exercisable in equal installments on 5/3/2023, 5/3/2024 and 5/3/2025.