Apellis Pharmaceuticals, Inc. is a commercial-stage biopharmaceutical company focused on discovering, developing, and commercializing novel therapeutic compounds for diseases with high unmet needs. Its products include EMPAVELI for paroxysmal nocturnal hemoglobinuria and SYFOVRE for geographic atrophy secondary to age-related macular degeneration. The company also develops EMPAVELI for C3 glomerulopathy, immune complex membranoproliferative glomerulonephritis, focal segmental glomerulosclerosis, and delayed graft function, and APL-3007, an siRNA for GA. It conducts preclinical studies for APL-9099, a neonatal Fc receptor (FcRn) targeting treatment with potential as a first-in-class gene editing therapy, and has collaborations with Swedish Orphan Biovitrum AB (publ) for pegcetacoplan and Beam Therapeutics for base editing technology. Incorporated in 2009 and headquartered in Waltham, Massachusetts, Apellis operates as a subsidiary of Biogen Inc. as of May 14, 2026.