HAYWARD, Calif., Jan. 24, 2013 /PRNewswire/ -- Anthera Pharmaceuticals, Inc. (Nasdaq: ANTH) today announced that it intends to offer and sell 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 15% of the shares of common stock offered in the public offering. The Company intends to use the net proceeds from the offering for general corporate purposes. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering. Jefferies & Company, Inc. is acting as sole book-running manager in the offering and Leerink Swann LLC is acting as co-manager. The securities described above are being offered by the Company pursuant to a shelf registration statement previously filed with, and declared effective by, the Securities and Exchange Commission (the "SEC"). A preliminary prospectus supplement and accompanying prospectus relating to the offering will be filed with the SEC and will be available on the SEC's website at http://www.sec.gov. Copies of the preliminary prospectus supplement and the accompanying prospectus relating to this offering, when available, may be obtained from Jefferies & Company, Inc., Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 12th Floor, New York, NY 10022, or by telephone at 877-547-6340, or by email at Prospectus_Department@Jefferies.com. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of, these securities in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or jurisdiction.