Array BioPharma Inc. (NASDAQ: ARRY) announced today that it is offering to sell, subject to market and other conditions, shares of its common stock pursuant to an effective shelf registration statement in an underwritten public offering. Array also intends to grant the underwriters a 30-day option to purchase additional shares of common stock to cover over-allotments, if any. All of the shares to be sold in the offering are to be sold by Array, with the proceeds to be used to fund research and development activities and for general corporate purposes. Jefferies & Company, Inc. and Leerink Swann LLC are acting as joint book-running managers of the proposed offering. Stifel Nicolaus Weisel is acting as co-manager of the offering. A shelf registration statement relating to the shares was filed with the Securities and Exchange Commission and is effective. Information about the offering is available in the preliminary prospectus supplement to be filed with the Securities and Exchange Commission. This press release does not constitute an offer to sell, or the solicitation of an offer to buy, these securities, nor will there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation or sale is not permitted. Any offer, if at all, will be made only by means of a prospectus, including a prospectus supplement, forming part of the effective shelf registration statement. Copies of the preliminary prospectus supplement and accompanying prospectus may be obtained from Jefferies & Company, Inc., Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 12th Floor, New York, New York 10022, or by calling (877) 547-6340, and Leerink Swann LLC, Attention: Syndicate Department, One Federal Street, 37th Floor, Boston, Massachusetts 02110, or by calling (800) 808-7525. About Array BioPharma Array BioPharma Inc. is a biopharmaceutical company focused on the discovery, development and commercialization of targeted small-molecule drugs to treat patients afflicted with cancer and inflammatory diseases. Array has four core proprietary clinical programs: ARRY-614 for myelodysplastic syndromes, ARRY-520 for multiple myeloma, ARRY-797 for pain and ARRY-502 for asthma. In addition, Array has 10 partner-funded clinical programs including two MEK inhibitors in Phase 2: selumetinib with AstraZeneca and MEK162 with Novartis.