8-K

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 18, 2016

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 incorporation or organization)	(Commission file number)	(I.R.S. Employer Identification No.)

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:

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

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

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

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

ITEM 2.01 Completion of Acquisition or Disposition of Assets.

On April 18, 2016, White Mountains Insurance Group Ltd. (“White Mountains” or the “Company”) announced that it completed the sale of Sirius International Insurance Group, Ltd., (“Sirius Group”) to CM International Holding Pte. Ltd., the Singapore-based investment arm of China Minsheng Investment Corp., Ltd. (“CMI”). The gross estimated purchase price paid at the closing was $2,592 million. Approximately $160 million of this amount was used to purchase out of Sirius Group certain assets to be retained by White Mountains, including shares of OneBeacon. The transaction is estimated to result in a gain of approximately $90 to White Mountains's adjusted book value per share.

ITEM 9.01 Financial Statements and Exhibits.

(b) Pro Forma Financial Information

In the Company’s financial statements contained within its Annual Report on Form 10-K for the fiscal year ended December 31, 2015 and its Quarterly Report on Form 10-Q for the period ended September 30, 2015, Sirius Group was presented as discontinued operations, with prior period amounts reclassified to conform to the current periods presented in those financial statements. Accordingly, the Company has not included pro forma financial statements in this Item 9.01.

(d) Exhibits

99.1 Press Release of White Mountains Insurance Group Ltd. dated April 18, 2016, furnished herewith.

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 18, 2016	By:	/s/ J. BRIAN PALMER
		J. Brian Palmer
[]	[]	Managing Director and Chief Accounting Officer

EX-99.1

Exhibit 99.1

PRESS RELEASE CONTACT:  David Foy 
Tel:  (203) 458-5850

White Mountains Completes Sale of Sirius Group

HAMILTON, Bermuda, April 18, 2016. White Mountains Insurance Group, Ltd. (NYSE: WTM) announced today that it has completed the sale of Sirius International Insurance Group, Ltd. to a subsidiary of CM International Holding Pte. Ltd., the Singapore-based investment arm of China Minsheng Investment Corp., Ltd. The gross estimated purchase price paid at the closing was $2,592 million. Approximately $160 million of this amount was used to purchase out of Sirius Group certain assets to be retained by White Mountains, including shares of OneBeacon. The transaction is estimated to result in a gain of approximately $90 to White Mountains’s adjusted book value per share.

White Mountains is in a quiet period until earnings are released on May 2.

ADDITIONAL INFORMATION

White Mountains is a Bermuda-domiciled financial services holding company traded on the New York Stock Exchange and the Bermuda Stock Exchange under the symbol WTM. Additional financial information and other items of interest are available at the Company’s web site located at www.whitemountains.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995

This press release may contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.  All statements, other than statements of historical facts, included or referenced in this press release which address activities, events or developments which White Mountains expects or anticipates will or may occur in the future are forward-looking statements.  The words "will", "believe," "intend," "expect," "anticipate," "project," "estimate," "predict" and similar expressions are also intended to identify forward-looking statements. These forward-looking statements include, among others, statements with respect to White Mountains:

• change in adjusted book value per share or return on equity;

• business strategy;

• financial and operating targets or plans;

• incurred loss and loss adjustment expenses and the adequacy of its loss and loss adjustment expense reserves and related reinsurance;

• projections of revenues, income (or loss), earnings (or loss) per share, dividends, market share or other financial forecasts;

• expansion and growth of its business and operations; and

• future capital expenditures.

These statements are based on certain assumptions and analyses made by White Mountains in light of its experience and perception of historical trends, current conditions and expected future developments, as well as other factors believed to be appropriate in the circumstances.  However, whether actual results and developments will conform to its expectations and predictions is subject to a number of risks and uncertainties that could cause actual results to differ materially from expectations, including:

• the risks that are described from time to time in White Mountains's filings with the Securities and Exchange Commission, including but not limited to White Mountains's Annual Report on Form 10-K for the fiscal year ended December 31, 2015 filed February 29, 2016;

• claims arising from catastrophic events, such as hurricanes, earthquakes, floods, fires, terrorist attacks or severe winter weather;

• the continued availability of capital and financing;

• general economic, market or business conditions;

• business opportunities (or lack thereof) that may be presented to it and pursued;

• competitive forces, including the conduct of other property and casualty insurers and reinsurers;

• changes in domestic or foreign laws or regulations, or their interpretation, applicable to White Mountains, its competitors or its customers;

• an economic downturn or other economic conditions adversely affecting its financial position;

• recorded loss reserves subsequently proving to have been inadequate;

• actions taken by ratings agencies from time to time, such as financial strength or credit ratings downgrades or placing ratings on negative watch; and

• other factors, most of which are beyond White Mountains' control.

Consequently, all of the forward-looking statements made in this press release are qualified by these cautionary statements, and there can be no assurance that the actual results or developments anticipated by White Mountains will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, White Mountains or its business or operations.  White Mountains assumes no obligation to publicly update any such forward-looking statements, whether as a result of new information, future events or otherwise.