Exelixis, Inc. Announces November 9 Webcast Of Clinical Investigator Discussions Of XL999, XL880, XL820 And XL184 Data

SOUTH SAN FRANCISCO, Calif., Nov. 3 /PRNewswire-FirstCall/ -- Exelixis, Inc. announced today that clinical investigators will discuss clinical data on XL999, XL880, XL820 and XL184 in conjunction with data presentations at the 18th EORTC-NCI-AACR Symposium on “Molecular Targets and Cancer Therapeutics” to be held in Prague, Czech Republic at 6:00 p.m. (local time) / 12:00 p.m. (ET) / 9:00 a.m. (PT) on Thursday, November 9, 2006.

The discussion will be webcast and archived and may be accessed in the Event Calendar page under Investors 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 III (XL119, exclusively out-licensed to Helsinn Healthcare S.A.), Phase II, and Phase I clinical development for cancer and renal disease. Exelixis has established strategic corporate alliances with major pharmaceutical and biotechnology companies, including GlaxoSmithKline, Bristol-Myers Squibb Company, Genentech, Wyeth Pharmaceuticals and Sankyo. For more information, please visit the company’s web site at www.exelixis.com .

Exelixis, Inc.

CONTACT: investors, Charles Butler, Director, Corporate Communications,+1-650-837-7277, or cbutler@exelixis.com, or media, Soleil MaxwellHarrison, Senior Manager, Corporate Communications, +1-650-837-7012, orsharrison@exelixis.com, both of Exelixis, Inc.

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