Imperva Files Registration Statement For Proposed Initial Public Offering

PRESS RELEASE

Redwood Shores, CA – June 17, 2011 – Imperva, Inc., a pioneer and leader of a new category of data security solutions for high-value business data in the data center, announced today that it has filed a registration statement with the U.S. Securities and Exchange Commission. The registration statement relates to a proposed initial public offering of shares of its common stock to be sold by the company and certain of its stockholders. The number of shares to be offered and the price range for the offering have not yet been determined.

J.P. Morgan Securities and Deutsche Bank Securities are acting as joint book-running managers for the offering. RBC Capital Markets, Lazard Capital Markets and Pacific Crest Securities are acting as co-managers. The offering will be made only by means of a prospectus. When available, copies of the preliminary prospectus relating to the offering may be obtained from: J.P. Morgan Securities LLC., Attention: Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Phone: (866) 803-9204; or Deutsche Bank Securities Inc., Attention: Prospectus Department, Harborside Financial Center, 100 Plaza One, Jersey City, NJ 07311-3988, Phone: (800) 503-4611, e-mail: [email protected].

A registration statement relating to these securities has been filed with the Securities and Exchange Commission, but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. 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 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.