Exhibit 99.1
JOINT FILING AGREEMENT
The undersigned, MVIL, LLC is jointly filing the attached Schedule 13D with MORNINGSIDE VENTURE INVESTMENTS LIMITED with respect to the beneficial ownership of securities of Amylyx Pharmaceuticals, Inc.
| MVIL, LLC | ||
| By: | /s/ Cheng Yee Wing Betty | |
| Cheng Yee Wing Betty, Manager | ||
