Exhibit 21.1
SOTERA HEALTH COMPANY
The following is a list of subsidiaries of Sotera Health Company, omitting subsidiaries which are dormant entities without any operations and holding no or de minimis assets, and which, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary as of February 28, 2023.
| | | | | | | | |
| Name of Subsidiary | | Jurisdiction of Incorporation |
| Companhia Brasileira de Esterilização | | Brazil |
| DEROSS Holding B.V. | | Netherlands |
| Nelson Laboratories, LLC | | Delaware |
| Nelson Laboratories Bozeman, LLC | | Delaware |
| Nelson Laboratories Fairfield Holdings, LLC | | Delaware |
| Nelson Laboratories Fairfield, Inc. | | New Jersey |
| Nelson Laboratories Holdings, LLC | | Delaware |
| Nelson Labs NV | | Belgium |
| Nordion (Canada) Inc. | | Canada |
| Nordion US Holdings LLC | | Delaware |
| Nordion (US) Inc. | | Delaware |
| Regulatory Compliance Associates Inc. | | Delaware |
| REVISS Services (UK) Limited | | United Kingdom |
| RSI Leasing, LLC | | California |
| Sotera Health LLC | | Delaware |
| Sotera Health Holdings, LLC | | Delaware |
| Sotera Health Services, LLC | | Delaware |
| Sterigenics Belgium Fleurus S.A. | | Belgium |
| Sterigenics Belgium Petit Rechain S.A. | | Belgium |
| Sterigenics Brasil Participaçãos EIRELI | | Brazil |
| Sterigenics Costa Rica, S.R.L. | | Costa Rica |
| Sterigenics Denmark A/S | | Denmark |
| Sterigenics EO Canada, Inc. | | Canada |
| Sterigenics France S.A.S. | | France |
| Sterigenics Germany GmbH | | Germany |
| Sterigenics Italy S.p.A. | | Italy |
| Sterigenics NV | | Belgium |
| Sterigenics Radiation Technologies, LLC | | Delaware |
| Sterigenics Radiation Technologies Canada, Inc. | | British Columbia |
| Sterigenics Radiation Technologies Holdings, LLC | | Delaware |
| Sterigenics Radiation Technologies IN, Inc. | | Indiana |
| Sterigenics, S. de R.L. de C.V. | | Mexico |
| Sterigenics S.A.S. | | France |
| Sterigenics Shanghai E-beam Ltd. | | China |
| Sterigenics Shanghai ETO Ltd. | | China |
| Sterigenics Thailand, Ltd. | | Thailand |
| Sterigenics UK Limited | | United Kingdom |
| Sterigenics U.S., LLC | | Delaware |
| STR 1 B.V. | | Netherlands |
| STR 2 B.V. | | Netherlands |
| STR C.V. | | Netherlands |
| Unidade de Esterilização Cotia LTDA | | Brazil |
