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Welcome to White Mountains Insurance Group, Ltd.

 

About White Mountains

White Mountains Insurance Group, Ltd. (White Mountains or the Company) is a financial services holding company with primary business interests in property and casualty insurance and reinsurance. The Company's corporate headquarters and its registered office are located in Hamilton, Bermuda and its principal executive office is located in Hanover, New Hampshire.

The Company conducts its principal businesses through:

  • OneBeacon - specialty insurance. OneBeacon's common shares are listed on the New York Stock Exchange under the symbol "OB". White Mountains owns 75% of OneBeacon.

  • Sirius Group - global reinsurance.

  • HG Global - U.S. municipal bond reinsurance.

  • White Mountains Advisors - investment management with $34 billion of assets under management.

White Mountains' common shares are listed on the New York Stock Exchange and the Bermuda Stock Exchange under the symbol "WTM". Market capitalization as of December 31, 2012 was approximately $3.2 billion; total assets of $12.9 billion, adjusted shareholders equity of $3.7 billion, and adjusted book value per Share of $588.

White Mountains' wholly-owned insurance businesses include:

White Mountains has ownership interests in:

  • OneBeacon Insurance Group - specialty insurance.
    As of 12/31/12, White Mountains holds a 75% interest in OneBeacon.

  • Symetra Financial Corp. - provider of employee benefits, annuities and life insurance.
    As of 12/31/12, White Mountains holds a 15% common interest in Symetra and warrants to purchase an additional 9.5 million common shares of the company. Assuming the exercise of all outstanding warrants, White Mountains' consolidated ownership interest in the company is 20%.


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