UNITED STATES

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

 

April 3, 2007

Date of Report (Date of earliest event reported)

 

WHITE MOUNTAINS INSURANCE GROUP, LTD.

(Exact name of registrant as specified in its charter)

 

 

80 South Main Street, Hanover, New Hampshire 03755

(Address of principal executive offices)

 

(603) 640-2200

(Registrant’s telephone number, including area code)

 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

 

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

 

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

 

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

 

 

ITEM 7.01          Regulation FD.

 

The Registrant’s executive officers intend to utilize the information attached as Exhibit 99.1 to this Form 8-K, in whole or in part, at presentations with investors.

 

ITEM 9.01   Financial Statements and Exhibits

 

(d) Exhibits.  The following exhibit is furnished herewith:

 

EXHIBIT INDEX

 

99.1 Supplemental Regulation FD Disclosure dated April 3, 2007.

99.2 Reconciliation of non-GAAP financial measures.

 

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: April 3, 2007	By:	/s/   J. BRIAN PALMER
		J.Brian Palmer
		Chief Accounting Officer