    <SEC-DOCUMENT>0001628280-24-015812-index.html : 20240411
    <SEC-HEADER>0001628280-24-015812.hdr.sgml : 20240411
    <ACCEPTANCE-DATETIME>20240411161225
    ACCESSION NUMBER:		0001628280-24-015812
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20231231
    FILED AS OF DATE:		20240411
    DATE AS OF CHANGE:		20240411
    EFFECTIVENESS DATE:		20240411

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Merck & Co., Inc.
    		CENTRAL INDEX KEY:			0000310158
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		ORGANIZATION NAME:           	03 Life Sciences
    		IRS NUMBER:				221918501
    		STATE OF INCORPORATION:			NJ
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-06571
    		FILM NUMBER:		24838653

    	BUSINESS ADDRESS:
    		STREET 1:		2000 GALLOPING HILL ROAD
    		CITY:			KENILWORTH
    		STATE:			NJ
    		ZIP:			07033
    		BUSINESS PHONE:		908-740-4000

    	MAIL ADDRESS:
    		STREET 1:		2000 GALLOPING HILL ROAD
    		CITY:			KENILWORTH
    		STATE:			NJ
    		ZIP:			07033

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Merck & Co. Inc.
    		DATE OF NAME CHANGE:	20091103

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	SCHERING PLOUGH CORP
    		DATE OF NAME CHANGE:	19920703
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>merck_10-kxarsx4.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: merck_10-kxarsx4.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>