Exhibit 21.1
Mirion Technologies, Inc.
List of Subsidiaries
| Mirion Technologies (TopCo), Ltd. | Jersey | |
| Mirion IntermediateCo, Inc. | Delaware, USA | |
| Mirion Technologies (HoldingSub1), Ltd. | United Kingdom | |
| Mirion Technologies (HoldingSub2), Ltd. | United Kingdom | |
| Mirion Technologies (US Holdings), Inc. | Delaware, USA | |
| Mirion Technologies (HoldingRep), Ltd. | United Kingdom | |
| Mirion Technologies (UK), Inc. | United Kingdom | |
| Mirion Technologies (Global), Ltd. | United Kingdom | |
| Mirion Technologies (US), Inc. | Delaware, USA | |
| IST Acquisitions, LLC | Delaware, USA | |
| Mirion Technologies (GDS), Inc. | Delaware, USA | |
| Mirion Technologies (Conax Nuclear), Inc. | New York, USA | |
| Mirion Technologies (Canberra), Inc. | Delaware, USA | |
| Mobile Characterization Services LLC | New Mexico, USA | |
| Materials Characterization Company LLC | New Mexico, USA | |
| Mirion Technologies (France) SAS | France | |
| Mirion Technologies (IST) Corporation | New York, USA | |
| Mirion Technologies (IST France) SAS | France | |
| Mirion Technologies (MGPI) SAS | France | |
| Mirion Technologies (Canberra) SAS | France | |
| Mirion Technologies (RADOS) Oy | Finland | |
| Mirion Technologies (Germany) GmbH | Germany | |
| Mirion Technologies (RADOS) GmbH i. L. | Germany | |
| Mirion Technologies (MGPI H&B) GmbH | Germany | |
| Mirion Technologies (Canberra) GmbH | Germany | |
| Mirion Technologies (IST) Limited | United Kingdom | |
| Mirion Technologies (Canberra UK) Limited | United Kingdom | |
| Mirion Technologies (UK Holdco), Ltd. | United Kingdom | |
| Mirion Technologies (HK) Limited | Hong Kong | |
| Mirion Commercial (Beijing) Co., Ltd. | China | |
| Mirion Technologies (IST Canada) ULC | British Columbia, Canada | |
| Mirion Technologies (Canberra CA) Ltd. | Ontario, Canada | |
| Mirion Technologies (Canberra BNLS) NV | Zellik, Belgium | |
| Mirion Technologies (Canberra Olen) NV | Olen, Belgium | |
| Mirion Technologies (Canberra) KK | Japan | |
| Mirion Technologies (Dosimetry Services) B.V. | Netherlands | |
| Mirion Technologies (Luxembourg) S.à r.l. | Luxembourg | |
| Mirion Technologies (Capintec), Inc. | Delaware, USA | |
| Mirion Technologies (Premium Analyse) SAS | France | |
| Mirion Technologies (Selmic) Oy | Finland | |
| Mirion Technologies Selmic Baltic OÜ | Estonia | |
| Mirion Technologies (AWST) GmbH | Germany | |
| Biodex Medical Systems, Inc. | New York, USA | |
| Sun Nuclear Corp. | Florida, USA | |
| Gammex, Inc. | Wisconsin, USA | |
| Sun Nuclear GmbH | Germany | |
| Sun Nuclear B.V. | Netherlands | |
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