Trustwave Holdings, Inc. Files Registration Statement for Proposed Initial Public Offering

Chicago, Illinois (April 21, 2011) – Trustwave Holdings, Inc. announced today that it has filed a registration statement with the U.S. Securities and Exchange Commission relating to a proposed initial public offering of shares of its common stock. The number of shares to be offered and the price range for the offering have not yet been determined.

Morgan Stanley & Co. Incorporated, J.P. Morgan Securities LLC and Barclays Capital Inc. are acting as joint book-running managers for the offering. William Blair & Company, L.L.C. and BMO Capital Markets Corp. are acting as co-managers.

This offering will be made solely by means of a prospectus, copies of which may be obtained (when available) from: Morgan Stanley & Co. Incorporated, 180 Varick Street, 2nd Floor, New York, New York 10014, Attention: Prospectus Department, or by calling (866) 718-1649 or by emailing prospectus@morganstanley.com; J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, or by telephone at (866) 803-9204; or Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, or by calling (888) 603-5847 or by emailing barclaysprospectus@broadridge.com.

A registration statement relating to these securities has been filed with the SEC, 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.

About Trustwave
Trustwave is a leading provider of on-demand data security compliance solutions that enable businesses and other organizations of all sizes to efficiently achieve and maintain compliance with regulatory requirements and industry standards.

Contact:
Corey S. Tobin
Trustwave Holdings, Inc.
ctobin@trustwave.com
(312) 873-7648