Merck & Co., Inc. — Director's Dealing 2018

May 8, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2018-05-04

Reporting Person: Karachun Rita A (Sr. VP Fince-Global Controller)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-04	Restricted Stock Unit	$	A	3636.0000	Acquired	2021-05-04	Common Stock (3636.0000)	Direct
2018-05-04	Stock Option (right to buy)	$57.7500	A	25617.0000	Acquired	2028-05-03	Common Stock (25617.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	21174.9720	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 5/4/2019, 5/4/2020 and 5/4/2021.

F4: The option vests and becomes exercisable in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.