Seattle Genetics, Inc., a biotechnology company, develops and commercializes antibody-based therapies for the treatment of cancer. The company is developing antibody-drug conjugates (ADCs), a technology designed to harness the targeting ability of antibodies to deliver cell-killing agents directly to cancer cells. Its lead product, ADCETRIS (brentuximab vedotin), is an ADC that is commercially available in approximately 55 countries, including the United States, Canada, Japan, and members of the European Union for relapsed Hodgkin l