Merck & Co., Inc. — Director's Dealing 2017

May 9, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2017-05-05

Reporting Person: AMBROSE ADELE D (Sr.V-P & Chief Comuns Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-09	Common Stock	M	2576.0000	$0.0000	Acquired	23668.3290	Direct
2017-05-09	Common Stock	F	960.0000	$64.0100	Disposed	22708.3290	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-05	Restricted Stock Unit	$	A	2345.0000	Acquired	2020-05-05	Common Stock (2345.0000)	Direct
2017-05-05	Stock Option (right to buy)	$63.9700	A	21398.0000	Acquired	2027-05-04	Common Stock (21398.0000)	Direct
2017-05-09	Restricted Stock Unit	$	M	2576.0000	Disposed	2017-05-09	Common Stock (2576.0000)	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: The option vests and becomes exercisable in three equal installments on 5/5/2018, 5/5/2019 and 5/5/2020.