0000939767 2020-11-05 2020-11-05 0000939767 false 8-K 2020-11-05 EXELIXIS, INC. DE 000-30235 04-3257395 1851 Harbor Bay Parkway Alameda CA 94502 650 837-7000 false false false false Common Stock $.001 Par Value per Share EXEL NASDAQ false 2020-11-05