SEATTLE, WA, March 28, 2012 /PRNewswire/ - Oncothyreon Inc. (NASDAQ: ONTY) today announced its intention to offer, subject to market and other conditions, shares of its common stock in an underwritten public offering. Oncothyreon also expects to grant the underwriters a 30-day option to purchase up to an additional 15 percent of the shares of common stock offered in the public offering to cover over-allotments, if any. The proceeds of the offering will primarily be used to fund the development of PX-866, Oncothyreon's irreversible pan-isoform PI-3 kinase inhibitor, and ONT-10, Oncothyreon's proprietary follow-on vaccine to Stimuvax. Stimuvax, currently in a Phase 3 pivotal trial, is a vaccine for patients with non-small cell lung cancer and is partnered with Merck KGaA. The offering proceeds may also be used for general corporate purposes. Cowen and Company, LLC is acting as the sole book-running manager for the offering, and Stifel, Nicolaus & Company, Incorporated is acting as co-manager. Oncothyreon intends to offer and sell these securities pursuant to its existing shelf registration statement (File # 333-178726) filed with the Securities and Exchange Commission on December 23, 2011, as amended on January 10, 2012, which was declared effective on January 10, 2012. A prospectus supplement describing the terms of the offering will be filed with the Securities and Exchange Commission and will form a part of the effective registration statement. Copies of the prospectus supplement and accompanying 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). An electronic copy of the prospectus supplement and accompanying relating to the offering is available on the website of the Securities and Exchange Commission at www.sec.gov. This press release does not constitute an offer to sell or the solicitation of offers to buy any securities of Oncothyreon, and shall not constitute an offer, solicitation or sale of any security 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.About Oncothyreon Oncothyreon is a biotechnology company specializing in the development of innovative therapeutic products for the treatment of cancer. Oncothyreon's goal is to develop and commercialize novel synthetic vaccines and targeted small molecules that have the potential to improve the lives and outcomes of cancer patients.