Merck & Co., Inc. — Director's Dealing 2019

May 8, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2019-05-03

Reporting Person: Zachary Jennifer (EVP, General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-04	Common Stock	M	5772.0000	$0.0000	Acquired	5772.0000	Direct
2019-05-04	Common Stock	F	2154.0000	$80.0000	Disposed	3618.0000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-03	Stock Option (right to buy)	$80.0000	A	66333.0000	Acquired	2029-05-02	Common Stock (66333.0000)	Direct
2019-05-04	Restricted Stock Unit	$	M	5772.0000	Disposed	2021-05-04	Common Stock (5772.0000)	Direct

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: The option vests and becomes exercisable in three equal installments on 5/3/2020, 5/3/2021 and 5/3/2022.

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.