0001492422 2026-04-28 2026-04-28 false 0001492422 8-K 2026-04-28 Apellis Pharmaceuticals, Inc. DE 001-38276 27-1537290 100 Fifth Avenue Waltham MA 02451 (617) 977-5700 false false false false Common Stock, $0.0001 par value per share APLS NASDAQ false