0001370053 2021-01-18 2021-01-18 0001370053 false 8-K 2021-01-18 ANAPTYSBIO, INC DE 001-37985 20-3828755 10421 Pacific Center Court Suite 200 San Diego CA 92121 858 362-6295 false false false false Common Stock, par value $0.001 per share ANAB NASDAQ false