BOTHELL, Wash.--(BUSINESS WIRE)--Seattle Genetics, Inc. (Nasdaq: SGEN) announced today that it has achieved a milestone under its antibody-drug conjugate (ADC) collaboration with Agensys, Inc., an affiliate of Tokyo-based Astellas Pharma Inc. The milestone was triggered by Agensys’ initiation of a phase I trial for AGS-16M8F, an ADC for the treatment of cancer utilizing Seattle Genetics’ technology.