Exelixis Announces Webcasts of Three Presentations at Healthcare and Biotechnology Conferences in September 2009

Exelixis, Inc. (Nasdaq:EXEL) announced that Frank Karbe, the company’s executive vice president and chief financial officer, will present at the following healthcare and biotechnology conferences during the month of September 2009:

• The Thomas Weisel Partners Healthcare Conference in Boston. Mr. Karbe will present at 2:05 p.m. ET/11:05 a.m. PT on Thursday, September 10, 2009.
• The Morgan Stanley Global Healthcare Conference in New York. Mr. Karbe will present at 11:30 a.m. ET/8:30 a.m. PT on Tuesday, September 15, 2009.
• The BioCentury Newsmakers in the Biotech Industry Conference in New York. Mr. Karbe will present at 3:00 p.m. ET/12:00 p.m. PT on Wednesday, September 16, 2009.

During each presentation, Mr. Karbe will discuss Exelixis’ development pipeline and corporate strategy. Each presentation will be webcast and may be accessed in the Event Calendar page under Investors on the Exelixis website at www.exelixis.com.

About Exelixis

Exelixis, Inc. is a development-stage biotechnology company dedicated to the discovery and development of novel small molecule therapeutics for the treatment of cancer and other serious diseases. The company is leveraging its fully integrated drug discovery platform to fuel the growth of its development pipeline, which is primarily focused on cancer. Currently, Exelixis’ broad product pipeline includes investigational compounds in phase 3, phase 2, and phase 1 clinical development. Exelixis has established strategic corporate alliances with major pharmaceutical and biotechnology companies, including Bristol-Myers Squibb, sanofi-aventis, GlaxoSmithKline, Genentech, Boehringer Ingelheim, Wyeth Pharmaceuticals, and Daiichi-Sankyo. For more information, please visit the company’s web site at www.exelixis.com.