<SEC-DOCUMENT>0000310158-25-000063.txt : 20251112
<SEC-HEADER>0000310158-25-000063.hdr.sgml : 20251112
<ACCEPTANCE-DATETIME>20251112161152
ACCESSION NUMBER:		0000310158-25-000063
CONFORMED SUBMISSION TYPE:	13F-HR
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250930
FILED AS OF DATE:		20251112
DATE AS OF CHANGE:		20251112
EFFECTIVENESS DATE:		20251112

FILER:

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

	FILING VALUES:
		FORM TYPE:		13F-HR
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	028-25193
		FILM NUMBER:		251472831

	BUSINESS ADDRESS:	
		STREET 1:		126 EAST LINCOLN AVENUE
		STREET 2:		P.O. BOX 2000
		CITY:			RAHWAY
		STATE:			NJ
		ZIP:			07065
		BUSINESS PHONE:		908-740-4000

	MAIL ADDRESS:	
		STREET 1:		126 EAST LINCOLN AVENUE
		STREET 2:		P.O. BOX 2000
		CITY:			RAHWAY
		STATE:			NJ
		ZIP:			07065

	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>
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<TYPE>13F-HR
<SEQUENCE>1
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      <periodOfReport>09-30-2025</periodOfReport>
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        <name>Merck &amp; Co., Inc.</name>
        <address>
          <com:street1>126 EAST LINCOLN AVENUE</com:street1>
          <com:street2>P.O. BOX 2000</com:street2>
          <com:city>RAHWAY</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07065</com:zipCode>
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      <provideInfoForInstruction5>N</provideInfoForInstruction5>
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    <signatureBlock>
      <name>Kelly Grez</name>
      <title>Corporate Secretary</title>
      <phone>908-740-4000</phone>
      <signature>/s/ Kelly Grez</signature>
      <city>Rahway</city>
      <stateOrCountry>NJ</stateOrCountry>
      <signatureDate>11-12-2025</signatureDate>
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