CARLSBAD, Calif., May 7, 2013 /PRNewswire/ -- Isis Pharmaceuticals, Inc. (NASDAQ: ISIS) announced today that it intends to offer for sale 9 million shares of its common stock in an underwritten public offering. In connection with this offering, Isis intends to grant the underwriters an option to purchase an additional 1.35 million shares of its common stock. All shares in the offering are being offered by Isis. The offering is subject to market 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. Goldman, Sachs & Co. and J. P. Morgan Securities LLC are acting as joint book-running managers in the offering. Stifel is acting as lead manager. BMO Capital Markets, Cowen and Company, LLC and Needham & Company are acting as co-managers. The securities described above are being offered by Isis pursuant to a shelf registration statement previously filed with the Securities and Exchange Commission (the "SEC"), which became effective on May 7, 2013. A preliminary prospectus supplement related to the offering will be filed with the SEC and will be available on the SEC's website located at http://www.sec.gov. Copies of the preliminary prospectus supplement and the accompanying prospectus relating to these securities may be obtained, when available, from Goldman, Sachs & Co. (Attn: Prospectus Department, 200 West Street, New York, New York 10282, Fax: 212-902-9316 or Email at email@example.com or by calling 1-866-471-2526) or J.P. Morgan Securities LLC (c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717 or by calling 866-803-9204). Electronic copies of the prospectus supplements may be obtained by visiting EDGAR on the SEC's website at http://www.sec.gov/ This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, 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 the registration or qualification under the securities laws of any such state or other jurisdiction.