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

May 6, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2020-05-04

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-04	Common Stock	M	1298	$77.67	Acquired	10273.935	Direct
2020-05-04	Common Stock	F	565	$77.67	Disposed	9708.935	Direct
2020-05-05	Common Stock	M	2345	$76.86	Acquired	12053.935	Direct
2020-05-05	Common Stock	F	1020	$76.86	Disposed	11033.935	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-04	Restricted Stock Unit	$	M	1298	Disposed	2021-05-04	Common Stock (1298)	Direct
2020-05-05	Restricted Stock Unit	$	M	2345	Disposed	2020-05-05	Common Stock (2345)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
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: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F4: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.