Document

Exhibit 21.1

SUBSIDIARIES OF STERIS PLC

STERIS plc has no parent company. As of March 31, 2025, its direct and indirect subsidiaries were as follows:


Name			Jurisdiction of Incorporation

Albert Browne Limited			England and Wales
American Sterilizer Company			Pennsylvania, USA
Bioster-Mottahedoon Egypt SAE			Egypt
Birkova Products, LLC			Indiana, USA
Bizworth Gammarad Sdn Bhd			Malaysia
Black Diamond Video, Inc.			California, USA
Cantel (Belgium) BV			Belgium
Cantel (Canada) Inc.			Canada
Cantel (UK) Limited			England and Wales
Cantel Medical (Italy) S.r.l.			Italy
Cantel Medical (UK) Limited			England and Wales
Cantel Medical Asia/Pacific Pte. Ltd.			Singapore
Cantel Medical Devices (China) Co., Ltd.			China
Cantel Medical International B.V.			Netherlands
Cantel Medical LLC			Delaware, USA
CLBV Limited			England and Wales
Diagmed Healthcare Limited			England and Wales
Electron Beam Sdn. Bhd.			Malaysia
Eschmann Holdings Limited			England and Wales
Genii, Inc.			Minnesota, USA
Harwell Dosimeters Limited			England and Wales
Herotron E-Beam Service GmbH			Germany
HMM HoldCo Limited			England and Wales
Hungaroptics KFT			Hungary
Isomedix Inc.			Delaware, USA
Isomedix Operations Inc.			Delaware, USA
Jet Prep Ltd.			Israel
Key Surgical Europe S.à r.l.			Switzerland
Key Surgical Limited			England and Wales
Key Surgical LLC			Delaware, USA
Konnexis Inc.			Canada
KS Apollo Holdings Inc.			Delaware, USA
KS Apollo LLC			Delaware, USA
KVI LLC			Delaware, USA
Mar Cor Purification, Inc.			Pennsylvania, USA
Massaro Limited Partnership (Victory Road)			Pennsylvania, USA

Exhibit 21.1


Name			Jurisdiction of Incorporation

Medical Innovations Group Holdings Limited			England and Wales
Medical Innovations Group Ltd			England and Wales
Medi-Cart International Limited			England and Wales
Medisafe America, L.L.C.			Florida, USA
Medisafe Holdings Ltd			England and Wales
Medisafe UK Limited			England and Wales
Medivators Inc.			Minnesota, USA
Mevex Corporation			Canada
SATYAtek S.A.			Switzerland
Shamrock Innovations Limited			Ireland
Shiloh Limited			England and Wales
Solar New US Holding Corporation			Delaware, USA
Solar New US Parent Co, LLC			Delaware, USA
Solar US Acquisition Co, LLC			Delaware, USA
STE UK HoldCo Limited			England and Wales
STE UK Sub HoldCo Limited			England and Wales
Sterile Supplies Limited			England and Wales
STERILMED France			France
STERIS (BVI) I Limited			British Virgin Islands
STERIS (India) Private Limited			India
STERIS (Shanghai) Trading Co., Ltd.			China
STERIS AB			Sweden
STERIS Applied Sterilization Technologies ULC			Canada
STERIS Asia Pacific, Inc.			Delaware, USA
STERIS AST CZ s.r.o.			Czech Republic
STERIS AST, storitve v zdravstvu, d.o.o			Slovenia
STERIS Australia PTY LTD			Australia
STERIS Barrier Products Solutions, Inc.			Pennsylvania, USA
STERIS Brazil Holdings, LLC			Delaware, USA
STERIS Canada ULC			Canada
STERIS Canada Sales ULC			Canada
STERIS CH Limited			England and Wales
STERIS China Holdings Limited			Hong Kong
STERIS Colombia S.A.S			Colombia
STERIS Corporation			Ohio, USA
STERIS Corporation de Costa Rica, S.A.			Costa Rica
STERIS Corporation de Republica Dominicana, S.R.L.			Dominican Republic
STERIS Deutschland GmbH			Germany
STERIS Dover AST Holdings Limited			England and Wales
STERIS Dover Canada Holdings Limited			England and Wales
STERIS Dover Limited			England and Wales

Exhibit 21.1


Name			Jurisdiction of Incorporation

STERIS Emerald IE Limited			Ireland
STERIS Europe, Inc.			Delaware, USA
STERIS FinCo S.à r.l.			Luxembourg
STERIS Finco II S.à r.l.			Luxembourg
STERIS GmbH			Switzerland
STERIS Holdings B.V.			Netherlands
STERIS Hong Kong Limited			Hong Kong
STERIS Iberia,S.A.			Spain
STERIS IMS Canada Inc.			Canada
STERIS IMS Limited			England and Wales
STERIS Inc.			Delaware, USA
STERIS Instrument Management Services, Inc.			Delaware, USA
STERIS Ireland Limited			Ireland
STERIS Irish FinCo Unlimited Company			Ireland
STERIS Irish FinCo II Unlimited Company			Ireland
STERIS Isomedix Puerto Rico LLC			Puerto Rico
STERIS Israel Solutions Ltd			Israel
STERIS Japan Inc.			Japan
STERIS Laboratories, Inc.			Minnesota, USA
STERIS Latin America, Inc.			Delaware, USA
STERIS Limited			England and Wales
STERIS Luxembourg Finance S.à r.l.			Luxembourg
STERIS Luxembourg Holding S.à r.l.			Luxembourg
STERIS Malaysia SDN. BHD.			Malaysia
STERIS Mauritius Limited			Republic of Mauritius
STERIS Mexico, S. de R.L. de C.V.			Mexico
STERIS Netherlands B.V.			Netherlands
STERIS New Zealand Limited			New Zealand
STERIS Personnel Services, Inc.			Delaware, USA
STERIS Portugal, Unipessoal, Lda.			Portugal
STERIS S.p.A.			Italy
STERIS S.r.l.			Italy
STERIS SA			Belgium
STERIS SAS			France
STERIS Solutions do Brasil Importacao e Comercializacao de Produtos da Saude Ltda.			Brazil
STERIS Solutions Korea Limited			South Korea
STERIS Solutions Limited			England and Wales
STERIS Solutions Pte. Limited			Singapore
STERIS Solutions, S. de R.L. de C.V.			Mexico
STERIS Sterilization Technologies (Suzhou) Ltd.			China

Exhibit 21.1


Name			Jurisdiction of Incorporation

STERIS Taiwan Co., Ltd.			Taiwan
STERIS TOMOE (Thailand) Ltd.			Thailand
STERIS Tomoe Singapore Pte. Ltd			Singapore
STERIS UK Holding Limited			England and Wales
STERIS US Holdings Corp.			Delaware, USA
STERIS-SHINVA Healthcare Systems Co., Ltd.			China
Synergy Health (Thailand) Limited			Thailand
Synergy Health (UK) Limited			England and Wales
Synergy Health Allershausen GmbH			Germany
Synergy Health Amsterdam B.V.			Netherlands
Synergy Health AST S.r.l.			Costa Rica
Synergy Health AST, LLC			Delaware, USA
Synergy Health Däniken AG			Switzerland
Synergy Health Ede B.V.			Netherlands
Synergy Health Holding B.V.			Netherlands
Synergy Health Holdings Limited			England and Wales
Synergy Health Investments Limited			England and Wales
Synergy Health Ireland Limited			Ireland
Synergy Health Limited			England and Wales
Synergy Health Logistics B.V.			Netherlands
Synergy Health Marseille SAS			France
Synergy Health Nederland B.V.			Netherlands
Synergy Health Radeberg GmbH			Germany
Synergy Health Sterilisation UK Limited			England and Wales
Synergy Health Systems Limited			England and Wales
Synergy Health True North, LLC			New York, USA
Synergy Health US Holdings, Inc.			Delaware, USA
Synergy Health Westport Limited			Ireland
Synergy Sterilisation KL (M) Sdn Bhd			Malaysia
Synergy Sterilisation Kulim (M) Sdn Bhd			Malaysia
Synergy Sterilisation (M) Sdn Bhd			Malaysia
Synergy Sterilisation Rawang (M) Sdn Bhd			Malaysia
Synergy Sterilisation South Africa (Propietary) Limited			South Africa
TekGo, Inc.			Delaware, USA
The STERIS Foundation			Ohio, USA
United States Endoscopy Group, Inc.			Ohio, USA
Vernon and Co. Limited			England and Wales
Vernon-Carus Limited			England and Wales