SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  -------------

                                    FORM 8-K

                                 CURRENT REPORT

                Pursuant to Section 13 or 15(d) of the Securities
                              Exchange Act of 1934


                                  JUNE 8, 2001
                Date of Report (Date of earliest event reported)


                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
             (Exact name of registrant as specified in its charter)



          BERMUDA                         1-8993                 94-2708455
(State or other jurisdiction of        (Commission            (I.R.S. Employer
 incorporation or organization)        file number)          Identification No.)


               80 SOUTH MAIN STREET, HANOVER, NEW HAMPSHIRE 03755
                    (Address of principal executive offices)


                                 (603) 643-1567
              (Registrant's telephone number, including area code)






ITEM 7.         FINANCIAL STATEMENTS AND EXHIBITS.

     (c)        Exhibits.  The following exhibits are filed herewith:

     EXHIBIT NO.             DESCRIPTION

     99 (a)                  Text of press release issued by White Mountains
                             Insurance Group, Ltd., dated June 8, 2001.

ITEM 9.        REGULATION FD DISCLOSURE.

White Mountains Insurance Group, Ltd. (the "Registrant") announced today changes
in certain key management positions at its new principal subsidiary, OneBeacon
Insurance Group.

The Registrant's press release dated June 8, 2001 is attached herewith as
Exhibit 99(a) and is incorporated by reference in its entirety.





                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.




                                        WHITE MOUNTAINS INSURANCE GROUP, LTD.



Dated: June 8, 2001                     By:                  /s/
                                             -----------------------------------
                                             J. Brian Palmer
                                             Chief Accounting Officer