Apellis Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company, focuses on the development of therapeutic compounds through the inhibition of the complement system for autoimmune and inflammatory diseases. Its lead product candidate is pegcetacoplan that is in Phase III clinical trials for the treatment of geographic atrophy in age-related macular degeneration and paroxysmal nocturnal hemoglobinuria diseases; and in Phase II clinical trials for the treatment of cold agglutinin disease, C3 glomerulopathy, IgA nephropathy, primary membranous nephropathy, and lupus nephritis. The company is also developing APL-9, which is in single ascending dose Phase I randomized, double-blind, and placebo-controlled clinical trials for the prevention of immune system activation coincident with adeno-associated virus for intravenous administration. Apellis Pharmaceuticals, Inc. has a strategic collaboration with Swedish Orphan Biovitrum AB (publ) for the advancement of pegcetacoplan, a C3 therapy for the treatment of multiple rare diseases, including paroxysmal nocturnal hemoglobinuria. The company was founded in 2009 and is based in Waltham, Massachusetts.