Exelixis, Inc. Announces May 3 Webcast of Its 2007 First Quarter Financial Results and Business Update Conference Call

SOUTH SAN FRANCISCO, Calif., April 24 /PRNewswire-FirstCall/ -- Exelixis, Inc. will release its 2007 first quarter financial results and business update on Thursday, May 3, 2007 after the markets close including:

-- Update on Key Clinical Trial Programs -- Developments under the Collaboration with GlaxoSmithKline

The announcement will be followed by a live webcast at 2:00 p.m. PT / 5:00 p.m. ET of a discussion by Exelixis management of the 2007 first quarter financial results and general business updates. The webcast may be accessed in the Event Calendar page under Investors at www.exelixis.com.

An archive of this webcast will be available until 9:00 p.m. PT/12:00 a.m. ET on June 02, 2007. Access numbers for this replay are: 888-286-8010 (domestic) and 617-801-6888 (international); Passcode number is 96106307.

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 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.

Investor Contact: Charles Butler Director, Investor Relations Exelixis, Inc. 650) 837-7277 cbutler@exelixis.com Media Contact: Soleil Maxwell Harrison Senior Manager, Corporate Communications Exelixis, Inc. (650) 837-7012 sharrison@exelixis.com

Exelixis, Inc.

CONTACT: Investors, Charles Butler, Director, Investor Relations, +1-650-837-7277, cbutler@exelixis.com, or Media, Soleil Maxwell Harrison,Senior Manager, Corporate Communications, +1-650-837-7012,sharrison@exelixis.com, both of Exelixis, Inc.

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