Exhibit 99.1 Fulcrum Therapeutics Announces Recent Business Highlights and Financial Results for First Quarter 2024 ― Entered into a collaboration and ex-U.S. license agreement with Sanofi for the development and commercialization of losmapimod ― ― On track to report topline data for Phase 3 REACH trial of losmapimod in facioscapulohumeral muscular dystrophy (FSHD) in the fourth quarter of 2024 ― ― Industry veteran, Patrick Horn M.D., Ph.D., appointed as chief medical officer ― ― Conference call and webcast ...