Amended Statement of Beneficial Ownership (3/a)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Nally Michael

2. Date of Event Requiring Statement (MM/DD/YYYY) 1/1/2019

3. Issuer Name and Ticker or Trading Symbol

Merck & Co., Inc. [MRK]

(Last) (First) (Middle)

MERCK & CO., INC., 2000 GALLOPING HILL ROAD

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
EVP, Chief Marketing Officer /

(Street)

KENILWORTH, NJ 07033

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

1/10/2019

6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	100.0000 ⁽¹⁾	D
Common Stock - 401(k) Plan	1365.9535 ⁽²⁾	I	By 401(k)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Stock Unit	5/4/2019 ⁽³⁾	5/4/2021	Common Stock	3896.0000	⁽⁴⁾	D
Restricted Stock Unit	5/10/2019	5/10/2019	Common Stock	1811.0000	⁽⁴⁾	D
Restricted Stock Unit	10/30/2019 ⁽⁵⁾	10/30/2021	Common Stock	6862.0000	⁽⁴⁾	D
Restricted Stock Unit	5/5/2020	5/5/2020	Common Stock	2345.0000	⁽⁴⁾	D
Stock Option (right to buy)	5/10/2017 ⁽⁶⁾	5/9/2026	Common Stock	7471.0000	$54.6800	D
Stock Option (right to buy)	5/4/2019 ⁽⁷⁾	5/3/2028	Common Stock	27447.0000	$57.7500	D
Stock Option (right to buy)	5/5/2018 ⁽⁸⁾	5/4/2027	Common Stock	14266.0000	$63.9700	D

Explanation of Responses:
(1)	The original Form 3, filed on January 10, 2019, is being amended by this Form 3 amendment solely to correct the total number of shares beneficially owned by the reporting person to include 100 shares of Merck common stock held in a joint account with the reporting person and the reporting person's parent.
(2)	Includes shares acquired and dividends earned through January 1, 2019, in the Merck U.S. Savings Plan, a 401(k) plan.
(3)	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.
(4)	Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.
(5)	These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 10/30/2019, 10/30/2020 and 10/30/2021.
(6)	The option vests and becomes exercisable in three equal installments on 5/10/2017, 5/10/2018 and 5/10/2019.
(7)	The option vests and becomes exercisable in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.
(8)	The option vests and becomes exercisable in three equal installments on 5/5/2018, 5/5/19 and 5/5/2020.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Nally Michael MERCK & CO., INC. 2000 GALLOPING HILL ROAD KENILWORTH, NJ 07033			EVP, Chief Marketing Officer

Signatures
Faye C. Brown as Attorney-in-Fact for Michael Nally		5/7/2019
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.