Exhibit 21.1
SUBSIDIARIES OF REPLIGEN CORPORATION
| Subsidiary Name | Subsidiary Jurisdiction | |
| Spectrum Life Sciences, LLC | United States | |
| Repligen (Shanghai) Biotechnology Co. Ltd. | China | |
| Repligen Estonia OṺ | Estonia | |
| Polymem S.A. | France | |
| Repligen GmbH | Germany | |
| 908 Devices GmbH | Germany | |
| Repligen India Private Limited | India | |
| ARTeSYN Biosolutions Holdings Ireland Ltd. | Ireland | |
| ARTeSYN Biosolutions Ireland Limited | Ireland | |
| Repligen Ireland Limited | Ireland | |
| Repligen Japan LLC | Japan | |
| Repligen Europe B.V. | Netherlands | |
| Repligen Singapore Pte. Ltd. | Singapore | |
| Repligen Korea Co., Ltd. | South Korea | |
| Repligen Sweden AB | Sweden | |
| Tantti Laboratory Inc | Taiwan | |
| Repligen UK Limited | United Kingdom | |
| Tantti Laboratory Inc | Taiwan |