FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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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 *

Karachun Rita A
2. Issuer Name and Ticker or Trading Symbol

Merck & Co., Inc. [ MRK ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Sr. VP Fince-Global Controller
(Last)          (First)          (Middle)

MERCK & CO., INC., 2000 GALLOPING HILL ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)

2/28/2020
(Street)

KENILWORTH, NJ 07033
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 2/28/2020  A  4269 (1)A$76.56 25058.972 (2)D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/17. Performance shares were paid out at 137 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2019.
(2) Holdings include shares acquired in dividend reinvestment transactions.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Karachun Rita A
MERCK & CO., INC.
2000 GALLOPING HILL ROAD
KENILWORTH, NJ 07033


Sr. VP Fince-Global Controller

Signatures
Faye C. Brown as Attorney-in-Fact for Rita Karachun3/3/2020
**Signature of Reporting PersonDate

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