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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-03	Common Stock	M	35000.0000	$39.2900	Acquired	106064.2090	Direct
2019-05-03	Common Stock	S	35000.0000	$80.00	Disposed	71064.2090	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	56454.0000	Acquired	2029-05-02	Common Stock (56454.0000)	Direct
2019-05-03	Stock Option (right to buy)	$39.2900	M	35000.0000	Disposed	2022-05-01	Common Stock (35000.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k) Plan	1073.8792	Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through April 5, 2019, in the Merck U.S. Savings Plan, a 401(k) plan.

F3: The option vests and becomes exercisable in three equal installments on 5/3/2020, 5/3/2021 and 5/3/2022.

F4: The option became exercisable in equal installments on 5/2/2013, 5/2/2014 and 5/2/2015.