Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b) On July 17, 2012, Morris Z. Rosenberg, D.Sc., Executive Vice President, Process Sciences of Seattle Genetics, Inc. ("Seattle Genetics" or "the Company"), informed the Company of his resignation in connection with his retirement. Dr. Rosenberg's resignation was effective July 17, 2012.

In connection with Dr. Rosenberg's resignation, Vaughn B. Himes, Ph.D., Seattle Genetics' Executive Vice President, Technical Operations has been appointed to an expanded role to include oversight of Process Sciences. Dr. Himes has many years of experience in the biotechnology industry, serving as our EVP, Technical Operations since April 2009 where his responsibilities have included clinical and commercial manufacturing, supply chain and logistics and quality assurance. Previously, Dr. Himes was with Zymogenetics, Inc. from November 2005 to March 2009 and Corixa, Inc. from March 2003 to October 2005 where he oversaw technical operations and process sciences in both positions. Dr. Himes received a Bachelor of Arts in Chemistry from Pomona College in California and a Ph.D. in Chemical Engineering from the University of Minnesota.

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