Additional Information about the Proposed Transaction and Where to Find It

This communication contains information about a proposed merger between Transatlantic and Alleghany. In connection with the proposed merger, Alleghany has filed with the SEC, and the SEC declared effective on January 5, 2012, a registration statement on Form S-4, which includes Transatlantic’s proxy statement as part of the joint proxy statement/prospectus, that provides details of the proposed merger and the attendant benefits and risks. This communication is not a substitute for the joint proxy statement/prospectus or any other document that Transatlantic or Alleghany may file with the SEC or send to their stockholders in connection with the proposed merger. Investors and security holders are urged to read the joint proxy statement/prospectus, and all other relevant documents filed with the SEC or sent to stockholders as they become available because they will contain important information about the proposed merger. You may obtain a free copy of the joint proxy statement/prospectus and other relevant documents filed by Transatlantic and Alleghany with the SEC at the SEC’s website at www.sec.gov. You may also obtain these documents by contacting Transatlantic’s Investor Relations department at Transatlantic Holdings, Inc., 80 Pine Street, New York, New York 10005, or via e-mail at investor_relations@transre.com; or by contacting Alleghany at Alleghany Corporation, 7 Times Square Tower, New York, New York 10036.

This communication does not constitute an offer to sell, or the solicitation of an offer to buy, any securities, or a solicitation of any vote or approval.

Copyright Business Wire 2010

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