EXHIBIT 21.1
Subsidiaries of the Registrant
| Name of Subsidiary |
Jurisdiction of Organization | |
| Acacia Communications Europe ApS |
Denmark | |
| Acacia Communications Holdings, Ltd. |
Bermuda | |
| Acacia Communications (Ireland) Limited |
Ireland | |
| Acacia Communications (Germany) GmbH |
Germany | |
| Acacia Communications (Shenzhen) Limited |
China | |
| ACIA Communications Technology (India) Private Limited |
India | |
| Acacia Technologies (UK) Limited |
United Kingdom |