Please wait

Exhibit 21 - MERCK & CO., INC. SUBSIDIARIES
changes as 12/31/2025
    The following is a list of subsidiaries of the Company, doing business under the name stated.
Name
Country or State of Incorporation
7728026 Canada Inc.
Canada
Abceutics, Inc.
Delaware
Abmaxis Inc.
Delaware
Acceleron Pharma Inc.
Delaware
Afferent Pharmaceuticals, Inc.
Delaware
Agrident GmbH
Germany
Allflex Argentina S.A.
Argentina
Allflex Australia Pty. Ltd.
Australia
Allflex (China) Intelligent Technology Co. Ltd.
China
Allflex Dan-Mark ApS
Denmark
Allflex Europe S.A.S.
France
Allflex Group Germany GmbH
Germany
Allflex India Private Limited
India
Allflex Maroc S.A.R.L.
Morocco
Allflex New Zealand
New Zealand
Allflex Polska Spolka z ograniczona odpowiedzialnoscia
Poland
Allflex Romania S.R.L.
Romania
Allflex UK Group Limited
United Kingdom
Allflex USA LLC
Delaware
Animal Health Registration World Wide (Proprietary) LimitedSouth Africa
ArQule, Inc.
Delaware
Biomark LLC
Idaho
Burgwedel Biotech GmbH
Germany
Calporta Therapeutics, Inc.
Delaware
Canji, Inc.
Delaware
Caraway Therapeutics Inc.
Delaware
Caymus Purchaser, Inc.Delaware
cCam Biotherapeutics Ltd.
Israel
Cherokee Pharmaceuticals LLC
Delaware
Controladora MSD Mexicana Sociedad de Responsabilidad Limitada de Capital Variable
Mexico
Cooper Veterinary Products (Proprietary) Limited
South Africa
Corporation Allflex ULC
Canada
Cosmas B.V.
Netherlands
Cubist Pharmaceuticals LLC
Delaware
Dialstat Trading 91 Pty Ltd T/A Allflex SA
South Africa
Diosynth Holding B.V.
Netherlands
Diosynth Produtos Farmo-quimicos Ltda.
Brazil
Elastec S.R.L.
Argentina
Essex Pharmaceuticals, Inc.
Philippines
Eyebiotech Limited
UK
Eyebiotech Inc.
Delaware
Farmacox - Companhia Farmaceutica, Sociedade Unipessoal, Lda.
Portugal
Farmasix-Produtos Farmaceuticos, Sociedade Unipessoal, Lda.
Portugal
1



Financiere MSD
France
Fontelabor-Produtos Farmaceuticos, Sociedade Unipessoal, Lda.
Portugal
Frosst Laboratories, Inc.
Delaware
Frosst Portuguesa - Produtos Farmaceuticos, Sociedade Unipessoal, Lda.
Portugal
GlycoFi, Inc.
Delaware
Hangzhou MSD Pharmaceutical Co., Ltd.1
China
Harpoon Therapeutics Inc.
Delaware
Harrisvaccines LLC
Iowa
Hawk and Falcon L.L.C.
Delaware
Heptafarma Companhia Farmaceutica, Sociedade Unipessoal, Lda.
Portugal
Hydrochemie GmbH
Germany
Idenix GmbH
Switzerland
IdentiGEN Limited
Ireland
Imago Biosciences, Inc.
Delaware
Immune Design Corp.
Delaware
International Indemnity Ltd.
Bermuda
Intervet (Ireland) Limited
Ireland
Intervet (Israel) Ltd.
Israel
Intervet (M) Sdn. Bhd.
Malaysia
Intervet (Proprietary) Limited
South Africa
Intervet (Thailand) Ltd.
Thailand
Intervet Agencies B.V.
Netherlands
Intervet Animal Health Taiwan Limited
Taiwan
Intervet Arabia LimitedSaudi Arabia
Intervet Argentina S.A.
Argentina
Intervet Australia Pty Limited
Australia
Intervet Canada Corp.
Canada
Intervet Central America S. de R.L.
Panama
Intervet Deutschland GmbH
Germany
Intervet Ecuador S.A.
Ecuador
Intervet Egypt for Animal Health SAE
Egypt
Intervet GesmbH
Austria
Intervet Hellas M.A.E.
Greece
Intervet Holding B.V.
Netherlands
Intervet Holdings France SAS
France
Intervet Hungaria Értékesítő Kft
Hungary
Intervet Inc.
Delaware
Intervet India Private Limited
India
Intervet International B.V.
Netherlands
Intervet International GmbH
Germany
Intervet International Sarl
France
Intervet LLC
Russian Federation
Intervet Maroc S.A.
Morocco
Intervet Mexico S.A. de C.V.
Mexico
Intervet Middle East Limited
Cyprus
Intervet Nederland B.V.
Netherlands
Intervet Philippines, Inc.
Philippines
Intervet Productions S.A.
France
Intervet Productions S.r.l.
Italy
2



Intervet Romania SRL
Romania
Intervet SAS
France
Intervet Schering-Plough Animal Health Pty. Ltd.
Australia
Intervet South Africa (Proprietary) Limited
South Africa
Intervet Sp. z.o.o.
Poland
Intervet UK Production Limited
United Kingdom
Intervet Venezolana S.A.
Venezuela
Intervet Veterinaria Chile Ltda
Chile
Intervet Veteriner Ilaclari Pazarlama ve Ticaret Ltd. Sirketi
Turkey
Intervet, s.r.o.
Czech Republic
Interveterinaria SA de CV
Mexico
IOmet Pharma Limited
Scotland
Laboratoires Merck Sharp & Dohme – Chibret
France
Laboratorios Abello, S.A.
Spain
Laboratorios Quimico-Farmaceuticos Chibret, Sociedade Unipessoal, Lda.
Portugal
Lemifar S. A.
Uruguay
Maya Tibbi Ürünler Ticaret Limited Sirketi
Turkey
MCM Vaccine B.V.1
Netherlands
Merck and Company LLC
Delaware
Merck Canada Inc.
Canada
Merck Capital Ventures, LLC1
Delaware
Merck Frosst Canada & Co.
Canada
Merck Frosst Company
Canada
Merck Global Health Innovation Fund, LLC
Delaware
Merck Global Health Innovation, Private Equity, LLC
Delaware
Merck HDAC Research, LLC
Delaware
Merck Holdings II Corp.
Delaware
Merck Holdings IV Corp.
Delaware
Merck Holdings V LLCDelaware
Merck Holdings LLC
Delaware
Merck Lumira Biosciences Fund L.P.1
Canada
Merck Registry Holdings, Inc.
New Jersey
Merck Research Investments LLC
Delaware
Merck Research Laboratories Massachusetts, LLC
Delaware
Merck Sharp & Dohme (Argentina) LLC
Delaware
Merck Sharp & Dohme (Asia) Limited
Hong Kong
Merck Sharp & Dohme (Australia) Pty. Limited
Australia
Merck Sharp & Dohme (Chile) Ltda.
Chile
Merck Sharp & Dohme (Enterprises) B.V.
Netherlands
Merck Sharp & Dohme (Holdings) Pty Ltd
Australia
Merck Sharp & Dohme (I.A.) LLC
Delaware
Merck Sharp & Dohme (International) Limited
Bermuda
Merck Sharp & Dohme (Israel - 1996) Company Ltd.
Israel
Merck Sharp & Dohme (Malaysia) SDN. BHD.
Malaysia
Merck Sharp & Dohme (New Zealand) Limited
New Zealand
Merck Sharp & Dohme (Sweden) A.B.
Sweden
Merck Sharp & Dohme (Switzerland) GmbH
Switzerland
Merck Sharp & Dohme (UK) Limited
United Kingdom
Merck Sharp & Dohme Animal Health, S.L.
Spain
3



Merck Sharp & Dohme Asia Pacific Services Pte. Ltd.
Singapore
Merck Sharp & Dohme B.V.
Netherlands
Merck Sharp & Dohme BH d.o.o.
Bosnia
Merck Sharp & Dohme Bulgaria EOOD
Bulgaria
Merck Sharp & Dohme Colombia S.A.S.
Colombia
Merck Sharp & Dohme Comercializadora, S. de R.L. de C.V.
Mexico
Merck Sharp & Dohme Cyprus Limited
Cyprus
Merck Sharp & Dohme d.o.o.
Croatia
Merck Sharp & Dohme d.o.o. Belgrade
Serbia
Merck Sharp & Dohme de España, SAU
Spain
Merck Sharp & Dohme Farmaceutica Ltda.
Brazil
Merck Sharp & Dohme Finance Europe Limited
United Kingdom
Merck Sharp & Dohme Gesellschaft m.b.H.
Austria
Merck Sharp & Dohme Holdings Corp.
Delaware
Merck Sharp & Dohme Holdings LLCDelaware
Merck Sharp & Dohme IDEA GmbH
Switzerland
Merck Sharp & Dohme inovativna zdravila d.o.o.
Slovenia
Merck Sharp & Dohme International Services B.V.
Netherlands
Merck Sharp & Dohme Ireland (Human Health) Limited
Ireland
Merck Sharp & Dohme Latvija
Latvia
Merck-Sharp & Dohme Ltda.
Bolivia
Merck Sharp & Dohme LLC
New Jersey
Merck Sharp & Dohme OU
Estonia
Merck Sharp & Dohme Peru SRL
Peru
Merck Sharp & Dohme Pharmaceutical, Trading Single member Societe Anonyme
Greece
Merck Sharp & Dohme Research GmbH
Switzerland
Merck Sharp & Dohme Romania SRL
Romania
Merck Sharp & Dohme S.A.
Morocco
Merck Sharp & Dohme s.r.o.
Czech Republic
Merck Sharp & Dohme Salud Animal Perú S.A.
Peru
Merck Sharp & Dohme Salud Animal Colombia S.A.S.
Colombia
Merck Sharp & Dohme Saúde Animal Ltda.
Brazil
Merck Sharp & Dohme Singapore Trading Pte. Ltd.
Singapore
Merck Sharp & Dohme Tunisie SARL
Tunisia
Merck Sharp & Dohme, Limitada
Portugal
Merck Sharp & Dohme, S. de R.L. de C.V.
Mexico
Merck Sharp & Dohme, s.r.o.
Slovakia
Merck Sharp Dohme Ilaclari Limited Sirketi
Turkey
Merck Teknika LLC
Delaware
Merko Acquisition S.A.
Belgium
Merko Dalton B.V.
Netherlands
Merko N.V.
Belgium
ML Holdings (Canada) ULC
Canada
Modifi Biosciences, Inc.
Delaware
MRL San Francisco, LLC
Delaware
MRL Ventures Fund LLC
Delaware
MSD (Hainan) Innovative Healthcare Co., Ltd.
China
MSD (I.A.) B.V.
Netherlands
MSD (Ningbo) Animal Health Technology Co., Ltd.
China
4



MSD (Norge) AS
Norway
MSD (Proprietary) Limited
South Africa
MSD (Shanghai) Pharmaceuticals Consultancy Co., Ltd.
China
MSD (Thailand) Ltd.
Thailand
MSD Agencies B.V.
Netherlands
MSD Animal Health UK Limited
United Kingdom
MSD Animal Health (Phils.), Inc
Philippines
MSD Animal Health (Shanghai) Trading Co., Ltd.
China
MSD Animal Health A/S
Denmark
MSD Animal Health B.V.
Belgium
MSD Animal Health Danube Biotech GmbH
Austria
MSD Animal Health FZ-LLC
United Arab Emirates
MSD Animal Health GmbH
Switzerland
MSD Animal Health Holdings B.V.
Netherlands
MSD Animal Health Innovation AS
Norway
MSD Animal Health Innovation GmbH
Germany
MSD Animal Health Innovation Pte. Ltd.
Singapore
MSD Animal Health K.K.
Japan
MSD Animal Health Korea Ltd.
Korea
MSD Animal Health Norge AS
Norway
MSD Animal Health Oy
Finland
MSD Animal Health S.r.l.
Italy
MSD Animal Health Sweden AB
Sweden
MSD Animal Health Vietnam Company Limited
Vietnam
MSD Animal Health, Lda.
Portugal
MSD Argentina SRL
Argentina
MSD Asia Holdings Pte. Ltd.
Singapore
MSD BD-4 GmbH
Switzerland
MSD Belgium BV – SRL
Belgium
MSD Biotech B.V.
Netherlands
MSD Central America Services S. de R.L.
Panama
MSD Central America Services Guatemala
Guatemala
MSD China (Investments) B.V.
Netherlands
MSD China B.V.
Netherlands
MSD China Holding Co., Ltd.
China
MSD Cubist Holdings BV
Switzerland
MSD Cubist Holdings Unlimited Company
Ireland
MSD Czech Republic s.r.o.
Czech Republic
MSD Danmark ApS
Denmark
MSD Egypt LLC
Egypt
MSD Eurofinance
Bermuda
MSD Europe Belgium SRL
Belgium
MSD Farmaceutica C.A.
Venezuela
MSD FI BV
Netherlands
MSD Finland Oy
Finland
MSD France
France
MSD Global Holdings B.V.
Netherlands
MSD Global Holdings 2 B.V.Netherlands
MSD HH Vietnam Ltd
Vietnam
5



MSD Hyderabad Global Capabilities Center India Private LimitedIndia
MSD Human Health Holding B.V.
Netherlands
MSD Human Health Holding II B.V.
Netherlands
MSD IDEA Algerie SPA
Algeria
MSD IDEA Pharmaceuticals Nigeria Limited
Nigeria
MSD IDEA Tunisie SARL
Tunisia
MSD Innovation and Development GmbH
Switzerland
MSD International B.V.
Netherlands
MSD International Business GmbH
Switzerland
MSD International Finance B.V.
Netherlands
MSD International GmbH
Switzerland
MSD International Manufacturing GmbH
Switzerland
MSD Italia s.r.l.
Italy
MSD Japan Holdings B.V.
Netherlands
MSD Japan Holdings GK
Japan
MSD K.K.
Japan
MSD KSA GmbH
Switzerland
MSD Korea Co., Ltd.
Korea
MSD Laboratories India LLC
Delaware
MSD Latin America Services S. de R.L.
Panama
MSD Latin America Services S. de R.L. de C.V.
Mexico
MSD Limited
United Kingdom
MSD Luxembourg S.a.r.l.
Luxembourg
MSD Merck Sharp & Dohme AG
Switzerland
MSD Netherlands Capital B.V.
Netherlands
MSD NL 4 B.V.
Netherlands
MSD Panama International Services S. de R.L.
Panama
MSD Participations B.V.
Netherlands
MSD Pensions Trustee Limited
United Kingdom
MSD Pharma (Singapore) Pte. Ltd.
Singapore
MSD Pharma GmbH
Germany
MSD Pharma Hungary Korlatolt Felelossegu Tarsasag
Hungary
MSD Pharmaceuticals LLC
Russian Federation
MSD Pharmaceuticals Private Limited
India
MSD Polska Dystrybucja Sp. z.o.o.
Poland
MSD Polska Sp.z.o.o.
Poland
MSD R&D (China) Co., Ltd.
China
MSD R&D Innovation Centre Limited
United Kingdom
MSD RDC Costa Rica Sociedad de Responsabilidad Limitada
Costa Rica
MSD Registry Holdings, Inc.
New Jersey
MSD Row Holdings I B.V.Netherlands
MSD Shared Business Services EMEA Limited
Ireland
MSD Sharp & Dohme Gesellschaft mit beschränkter Haftung
Germany
MSD Switzerland Investments 4 Unlimited Company
Ireland
MSD Ukraine Limited Liability Company
Ukraine
MSD Vaccins
France
MSD Vaccins Holdings
France
MSD Venezuela Holding GmbH
Switzerland
MSD Verwaltungs GmbH
Germany
6



MSD Vietnam Holdings B.V.
Netherlands
MSD Worldwide Holdings LLCDelaware
MSDIG Holdings Unlimited Company
Ireland
MSDIG Holdings 2 Unlimited Company
Ireland
MSP Vaccine Company1
Pennsylvania
Multilan AG
Switzerland
Nihon MSD G.K.
Japan
Nourifarma - Produtos Quimicos e Farmaceuticos, Sociedade Unipessoal, Lda
Portugal
O.PI.VI S.R.L.
Italy
OBS Holdings B.V.
Netherlands
Oncoethix GmbH
Switzerland
OncoImmune, Inc.
Delaware
OS ID AS
Norway
OSID Stallmästaren AB
Sweden
P.T. Merck Sharp & Dohme Indonesia
Indonesia
Pandion Operations, Inc.
Delaware
Pandion Therapeutics, Inc.
Delaware
Peloton Therapeutics, Inc.
Delaware
Polnet ID Spolka z ograniczona odpowiedzialnoscia
Poland
PrognostiX-Poultry Limited
United Kingdom
Prometheus Biosciences, Inc.
Delaware
Prondil Sociedad Anónima
Uruguay
PT Intervet Indonesia
Indonesia
Putexin Investments Limited
New Zealand
Rigontec GmbH
Germany
Rosetta Inpharmatics LLC
Delaware
S.C.R. (Engineers) Limited
Israel
Schering-Plough (Ireland) Unlimited Company
Ireland
Schering-Plough Animal Health Limited
New Zealand
Schering-Plough Canada Inc.
Canada
Schering-Plough Corporation
Philippines
Schering-Plough Corporation, U.S.A.
Delaware
Schering-Plough Holdings Limited
United Kingdom
Schering-Plough S.A.Uruguay
Schering-Plough S.A.
Paraguay
Schering-Plough S.A.
Spain
SCR Allflex Management, Ltd
Israel
Servicios Veterinarios Servet, Sociedad Anónima
Costa Rica
Shanghai MSD Pharmaceutical Trading Co., Ltd.
China
Sistemas de Identificacao Animal Ltda
Brazil
SmartCells, Inc.
Delaware
SOL Limited
Bermuda
SureFlap Limited
United Kingdom
Themis Bio Holdings LLC
Delaware
Theriak B.V.
Netherlands
Tilos Therapeutics, Inc.
Delaware
UAB Merck Sharp & Dohme
Lithuania
Vaki Fiskeldiskerfi ehf.
Iceland
VelosBio Inc.
Delaware
7



VelosBio Canada Inc.
Canada
Vence Corp
Delaware
Vence Corp AU Pty Ltd
Australia
Venco Farmaceutica S.A.
Venezuela
Venco Holding GmbH
Switzerland
Verona Pharma, Inc.Delaware
Verona Pharma Ireland LimitedIreland
Verona Pharma LtdUnited Kingdom
Vet Pharma Friesoythe GmbH
Germany
Veterinaria Premium, Sociedad Anonima
Guatemala
VetInvent, LLC
Delaware
Vetrex B.V.
Netherlands
Vetrex Egypt L.L.C.
Egypt
Vol Holdings LLCDelaware
Vree Health Italia S.r.l.
Italy
Werthenstein Biopharma GmbH
Switzerland
Zoöpharm B.V.
Netherlands

___________
1 own less than 100%
8