0001370053 2021-10-04 2021-10-04 0001370053 false 8-K 2021-10-04 ANAPTYSBIO, INC DE 001-37985 20-3828755 10770 Wateridge Circle Suite 210, San Diego CA 92121 858 362-6295 false false false false Common Stock, par value $0.001 per share ANAB NASDAQ false