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: DeLuca Richard R. (EVP&Pres, Merck Animal Health)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-04	Stock Option (right to buy)	$57.7500	A	73191.0000	Acquired	2028-05-03	Common Stock (73191.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	55861.5390	Direct
Common Stock - 401(k) Plan	1047.9847	Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through April 6, 2018, in the Merck U.S. Savings Plan, a 401(k) plan.

F3: The option vests and becomes exercisable in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.