Tower Group, Inc. to Acquire Specialty Underwriters' Alliance, Inc.

Business Wire, June 22, 2009

Additional Information

The proposed merger will be submitted to shareholders of SUA for their consideration. In connection with the proposed merger, Tower and SUA will file with the Securities and Exchange Commission (the “SEC”) a Registration Statement on Form S-4, a proxy statement/prospectus and other relevant documents. Shareholders of SUA are urged to read the registration statement, the proxy statement/prospectus and all other documents which will be filed with the SEC regarding the proposed merger when they become available because they will contain important information. Shareholders will be able to obtain a free copy of the registration statement, proxy statement/prospectus (when available), as well as other filings containing information about Tower and SUA, without charge, at the SEC’s Internet site (www.sec.gov). Copies of the registration statement, proxy statement/prospectus and the filings with the Securities and Exchange Commission that will be incorporated by reference in the proxy statement/prospectus can also be obtained, without charge, by accessing the companies’ websites: http://www.twrgrp.com/ or http://www.suainsurance.com/

SUA, its directors and executive officers and other persons may be deemed to be participants in the solicitations of proxies from the shareholders of SUA in respect of the proposed merger. Information regarding SUA’s directors and executive officers is available in its proxy statement filed with the Securities and Exchange Commission on April 1, 2009. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement/prospectus when it becomes available.

This press release shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. No offering of securities shall be made except by means of a proxy statement/prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

For more information visit Tower's website athttp://www.twrgrp.com/.

Or SUA's website athttp://www.suainsurance.com/.

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