Company:  WHITE MOUNTAINS INSURANCE ... (WTM)
Form Type:  4
Filing Date:  2/24/2012 
CIK:  0000776867 
Address:  80 SOUTH MAIN ST 
City, State, Zip:  HANOVER, New Hampshire 03755 
Telephone:  603 640 2200 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$604.27  
Change: 
2.52 (0.42%)  
Trade Time: 
May 23  
Market Cap: 
$3.73B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES
  EXHIBIT 24