Cerus Announces Proposed Public Offering Of Common Stock

Cerus Corporation (NASDAQ: CERS) today announced that it intends to offer and sell shares of its common stock, subject to market and other conditions, in an underwritten public offering. Cerus also expects to grant the underwriters a 30-day option to purchase additional shares of common stock to cover overallotments, if any. Cerus anticipates using the net proceeds from the offering for clinical development and other research and development activities related to the INTERCEPT Blood System, preparatory activities for the potential commercialization of the INTERCEPT Blood System in the United States and elsewhere, and for other general corporate purposes, including regulatory activity, selling, general and administrative expenses and working capital. Cerus may also use a portion of the net proceeds from the offering to prepay the remaining outstanding indebtedness under its growth capital loan with Comerica Bank.

Cowen and Company, LLC is acting as sole book-running manager for the offering.

The securities described above are being offered by Cerus pursuant to a shelf registration statement previously filed with and declared effective by the Securities and Exchange Commission (the “SEC”). 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 this offering, when available, may be obtained from Cowen and Company, LLC, c/o Broadridge Financial Services, 1155 Long Island Avenue, Edgewood, New York 11717, Attn: Prospectus Department, or by calling 631-274-2806, or by faxing 631-254-7140.

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 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 other jurisdiction.