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 overnight underwritten public offering. The company expects to grant the underwriter 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 of common stock in the offering will be sold by Exelixis. Subject to market and other conditions, the offering is expected to price before 9:30 a.m., EST, on January 23, 2014. Cowen and Company is acting as underwriter for the offering. The offering is being conducted by means of a prospectus supplement filed as part of a shelf registration statement previously filed with the Securities and Exchange Commission (SEC) on Form S-3. 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, including a prospectus supplement, forming a part of the effective registration statement. Copies of the preliminary prospectus supplement and base prospectus relating to the offering may be obtained, when available, from Cowen and Company, LLC (c/o Broadridge Financial Services., 1155 Long Island Avenue, Edgewood, NY 11717, Attn: Prospectus Department, Phone: 631-274-2806, Fax: 631-254-7140). 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 statement, on the SEC’s website at http://www.sec.gov. About Exelixis Exelixis is a biotechnology company committed to developing small molecule therapies for the treatment of cancer.