Exelixis Announces Proposed Public Offering Of Common Stock

Exelixis, Inc. (Nasdaq:EXEL) today announced that it plans to offer, subject to market and other conditions, 10,000,000 shares of its common stock in an underwritten public offering. The company expects to grant the underwriters a 30-day option to purchase up to an additional 1,500,000 shares of common stock in connection with the offering. All of the shares in the offering will be sold by Exelixis. The shares will be issued pursuant to a prospectus supplement filed as part of a shelf registration statement previously filed with the Securities and Exchange Commission (SEC) on Form S-3.

Goldman, Sachs & Co. is acting as sole book running manager, and Cowen and Company, LLC is acting as co-manager of the offering.

This announcement does not constitute an offer to sell or a solicitation of an offer to buy nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. This press release is being issued pursuant to and in accordance with Rule 134 under the Securities Act of 1933, as amended. Any offer, if at all, will be made only by means of a prospectus supplement and accompanying prospectus forming a part of the effective registration statement. Copies of the preliminary prospectus supplement and accompanying prospectus relating to the offering may be obtained, when available, from Goldman, Sachs & Co. (200 West Street, New York, New York 10282, Attn: Prospectus Department, Phone: [phone], Fax: [phone], Email: [e-mail]) or from Cowen and Company, LLC (c/o Broadridge Financial Services., 1155 Long Island Avenue, Edgewood, NY,11717, Attn: Prospectus Department, Phone: [phone], Fax: [phone]). Exelixis intends to file a preliminary prospectus supplement relating to the offering with the SEC, which will be available along with the prospectus filed with the SEC in connection with the shelf registration, on the SEC’s website at http://www.sec.gov/.

About Exelixis

Exelixis, Inc. is a biotechnology company committed to developing small molecule therapeutics for the treatment of cancer.