Exhibit 21.1
Subsidiaries of Collegium Pharmaceutical, Inc.
| Subsidiary | Jurisdiction of Incorporation | 
| Collegium Securities Corporation | Massachusetts | 
| Collegium NF, LLC | Delaware | 
| BioDelivery Sciences International, Inc. | Delaware | 
| Arius Pharmaceuticals, Inc. | Delaware | 
| Arius Two, Inc. | Delaware | 
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