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

May 10, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2019-05-07

Reporting Person: Clyburn Frank (EVP, Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-07	Common Stock	M	25000.00	$39.29	Acquired	92604.0870	Direct
2019-05-07	Common Stock	S	25000.00	$77.7273	Disposed	67604.0870	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-07	Stock Option (right to buy)	$39.29	M	25000.0000	Disposed	2022-05-01	Common Stock (25000.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k) Plan	1491.7678	Indirect

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.6400 to $77.8200, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

F2: Holdings include shares acquired in dividend reinvestment transactions.

F3: Includes shares acquired and dividends earned through April 5, 2019, in the Merck U.S. Savings Plan, a 401(k) plan.

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