Press Release

Exelixis Announces February 8th Webcast of Fourth Quarter & Full Year 2011 Financial Results Conference Call

February 6, 2012

SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Feb. 6, 2012-- Exelixis, Inc. (NASDAQ:EXEL) will release its fourth quarter and full year 2011 financial results on Wednesday, February 8, 2012, after the markets close. The announcement will be followed by a live webcast at 5:00 p.m. EST/ 2:00 p.m. PST. During the webcast, Exelixis management will discuss the Company’s financial results, financial outlook and development program and plans for cabozantinib, and also provide a general business update. The webcast may be accessed in the Event Calendar page under Investors at http://www.exelixis.com.

An archived replay of the webcast will be available on the Event Calendar page under Investors at http://www.exelixis.com and via phone until 11:59 p.m. EST on March 8, 2012. Access numbers for the phone replay are: (888) 286-8010 (domestic) and (617) 801-6888 (international); the passcode is 46993799.

About Exelixis

Exelixis, Inc. is a biotechnology company committed to developing small molecule therapies for the treatment of cancer. Exelixis is focusing its proprietary resources and development efforts exclusively on cabozantinib (XL184), its most advanced product candidate, in order to maximize the therapeutic and commercial potential of this compound. Exelixis believes cabozantinib has the potential to be a high-quality, broadly-active, differentiated pharmaceutical product that can make a meaningful difference in the lives of patients. Exelixis has also established a portfolio of other novel compounds that it believes have the potential to address serious unmet medical needs, many of which are being advanced by partners as part of collaborations. For more information, please visit the company's web site at www.exelixis.com.

Source: Exelixis, Inc.

Exelixis, Inc.
Charles Butler, 650-837-7277
Vice President,
Investor Relations and
Corporate Communications
cbutler@exelixis.com