Merck & Co., Inc. — Director's Dealing 2020

May 5, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2020-05-01

Reporting Person: Nally Michael (EVP, Chief Marketing Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-01	Stock Option (Right to Buy)	$77.67	A	57391	Acquired	2030-04-30	Common Stock (57391)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	8975.935	Direct
Common Stock - 401(k) Plan	1720.848	Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through April 7, 2020, in the Merck U.S. Savings Plan, a 401(k) plan.

F3: The option vests and becomes exercisable in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.