<SEC-DOCUMENT>0000776867-17-000033-index.html : 20170928
<SEC-HEADER>0000776867-17-000033.hdr.sgml : 20170928
<ACCEPTANCE-DATETIME>20170928161116
ACCESSION NUMBER:		0000776867-17-000033
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		5
CONFORMED PERIOD OF REPORT:	20170928
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Completion of Acquisition or Disposition of Assets
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170928
DATE AS OF CHANGE:		20170928

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WHITE MOUNTAINS INSURANCE GROUP LTD
		CENTRAL INDEX KEY:			0000776867
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				942708455
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08993
		FILM NUMBER:		171107587

	BUSINESS ADDRESS:	
		STREET 1:		80 SOUTH MAIN ST
		CITY:			HANOVER
		STATE:			NH
		ZIP:			03755
		BUSINESS PHONE:		603 640 2200

	MAIL ADDRESS:	
		STREET 1:		80 SOUTH MAIN STREET
		CITY:			HANOVER
		STATE:			NH
		ZIP:			03755

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WHITE MOUNTAINS INSURANCE GROUP INC
		DATE OF NAME CHANGE:	19990603

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FUND AMERICAN ENTERPRISES HOLDINGS INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FUND AMERICAN COMPANIES INC
		DATE OF NAME CHANGE:	19920701
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>wtm8-ksaleofob.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: wtm8-ksaleofob.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>invmgmtagreement-ex101.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
Document 2 - file: invmgmtagreement-ex101.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>pressrelease-ex991.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 3 - file: pressrelease-ex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>4
<FILENAME>obproformafinancials-ex992.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 4 - file: obproformafinancials-ex992.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>wtmimagea10.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: wtmimagea10.jpg

</DOCUMENT>
</SEC-DOCUMENT>