Seattle Genetics, Inc. (NASDAQ:SGEN) announced today that Clay B. Siegall, Ph.D., President and Chief Executive Officer, will present at the 31 st Annual J.P. Morgan Healthcare Conference on Monday, January 7, 2013, at 11:30 a.m. Pacific Time. The presentation will be webcast live and available for replay from Seattle Genetics’ website at www.seattlegenetics.com in the Investors and News section. About Seattle Genetics Seattle Genetics is a biotechnology company focused on the development and commercialization of monoclonal antibody-based therapies for the treatment of cancer. The company’s lead program, ADCETRIS, received accelerated approval from the U.S. Food and Drug Administration in August 2011 for two indications. In addition, under a collaboration with Millennium: The Takeda Oncology Company, ADCETRIS received conditional approval from the European Commission in October 2012. Seattle Genetics also has three other clinical-stage antibody-drug conjugate (ADC) programs: SGN-75, ASG-5ME and ASG-22ME. Seattle Genetics has collaborations for its ADC technology with a number of leading biotechnology and pharmaceutical companies, including Abbott, Agensys (an affiliate of Astellas), Bayer, Celldex Therapeutics, Daiichi Sankyo, Genentech, GlaxoSmithKline, Millennium, Pfizer and Progenics, as well as ADC co-development agreements with Agensys and Genmab. More information can be found at www.seattlegenetics.com.