| OneBeacon Insurance Group, Ltd. (OneBeacon) is a Bermuda-domiciled holding company, whose principal businesses are conducted through its property and casualty insurance subsidiaries. OneBeacon provides a range of insurance products and services, which historically included specialty, commercial and personal lines sold primarily through select independent agents and brokers. However, the company recently entered into two transactions that will transition it to a specialty lines company. OneBeacon's common shares are listed on the New York Stock Exchange under the symbol "OB". Market capitalization as of December 31, 2009 was $1.3 billion. White Mountains holds a 75% interest in OneBeacon as of 12/31/09. OneBeacon traces its roots to 1831 and the Potomac Fire Insurance Company. Today, OneBeacon's specialty insurance products are available countrywide, while personal lines product offerings have been concentrated in the northeastern states. The company offers its products through a network of independent agents, regional and national brokers, and wholesalers. OneBeacon's insurance operating subsidiaries consistently receive an "A" (excellent) rating from A.M. Best. As of December 31, 2009, OneBeacon had $1.4 billion in shareholders' equity and $1.9 billion in segment net written premium. ONEBEACON - SEGMENT FINANCIALS
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