Seagen Inc. is a biotechnology company, which engages in the development and commercialization of targeted therapies for the treatment of cancer. It also focuses on the advancement of therapies for solid tumors and blood-related cancers. Its products include Adcetris, Padcev, Tivdak, and Tukysa. The company was founded by Clay B. Siegall and H. Perry Fell on July 15, 1997 and is headquartered in Bothell, WA.