<SEC-DOCUMENT>0001465109-26-000020.txt : 20260507
<SEC-HEADER>0001465109-26-000020.hdr.sgml : 20260507
<ACCEPTANCE-DATETIME>20260507115630
ACCESSION NUMBER:		0001465109-26-000020
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20260507
DATE AS OF CHANGE:		20260507

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WHITE MOUNTAINS INSURANCE GROUP LTD
		CENTRAL INDEX KEY:			0000776867
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		ORGANIZATION NAME:           	02 Finance
		EIN:				942708455
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-36786
		FILM NUMBER:		26951848

	BUSINESS ADDRESS:	
		STREET 1:		23 SOUTH MAIN STREET
		STREET 2:		SUITE 3B
		CITY:			HANOVER
		STATE:			NH
		ZIP:			03755
		BUSINESS PHONE:		603 640 2200

	MAIL ADDRESS:	
		STREET 1:		23 SOUTH MAIN STREET
		STREET 2:		SUITE 3B
		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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Neuberger Berman Group LLC
		CENTRAL INDEX KEY:			0001465109
		ORGANIZATION NAME:           	
		EIN:				611591182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1290 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10104
		BUSINESS PHONE:		212-476-9000

	MAIL ADDRESS:	
		STREET 1:		1290 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10104
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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    <submissionType>SCHEDULE 13G/A</submissionType>
		<previousAccessionNumber>0001465109-26-000005</previousAccessionNumber>
	    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001465109</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>




    </filerInfo>
  </headerData>

  <formData>
    <coverPageHeader>
		<amendmentNo>1</amendmentNo>
	      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>04/30/2026</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0000776867</issuerCik>        <issuerName>WHITE MOUNTAINS INSURANCE GROUP LT </issuerName>

    <issuerCusips>
					<issuerCusipNumber>G9618E107</issuerCusipNumber>
				</issuerCusips>

        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>23 SOUTH MAIN STREET</com:street1>
          <com:street2>SUITE 3B</com:street2>          <com:city>hanover</com:city>
          <com:stateOrCountry>NH</com:stateOrCountry>
          <com:zipCode>03755</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>

	        <designateRulesPursuantThisScheduleFiled>
	   		        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
				      </designateRulesPursuantThisScheduleFiled>

    </coverPageHeader>

	    <coverPageHeaderReportingPersonDetails>




    <reportingPersonName>Neuberger Berman Group LLC</reportingPersonName>

	  		<memberGroup>b</memberGroup>


		 <citizenshipOrOrganization>DE</citizenshipOrOrganization>

      <reportingPersonBeneficiallyOwnedNumberOfShares>
                <soleVotingPower>0.00</soleVotingPower>
                          <sharedVotingPower>110283.00</sharedVotingPower>
                          <soleDispositivePower>0.00</soleDispositivePower>
                         <sharedDispositivePower>121583.00</sharedDispositivePower>
             </reportingPersonBeneficiallyOwnedNumberOfShares>

              <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>121583.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>


	    <aggregateAmountExcludesCertainSharesFlag>Y</aggregateAmountExcludesCertainSharesFlag>

     	    <classPercent>4.9</classPercent>







	        <typeOfReportingPerson>HC</typeOfReportingPerson>







    </coverPageHeaderReportingPersonDetails>
	    <coverPageHeaderReportingPersonDetails>




    <reportingPersonName>Neuberger Berman Investment Advisers LLC</reportingPersonName>

	  		<memberGroup>b</memberGroup>


		 <citizenshipOrOrganization>DE</citizenshipOrOrganization>

      <reportingPersonBeneficiallyOwnedNumberOfShares>
                <soleVotingPower>0.00</soleVotingPower>
                          <sharedVotingPower>106687.00</sharedVotingPower>
                          <soleDispositivePower>0.00</soleDispositivePower>
                         <sharedDispositivePower>117789.00</sharedDispositivePower>
             </reportingPersonBeneficiallyOwnedNumberOfShares>

              <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>117789.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>


     	    <classPercent>4.8</classPercent>




	  	  	  	  <typeOfReportingPerson>IA</typeOfReportingPerson>










    </coverPageHeaderReportingPersonDetails>

    <items>
      <item1>
        <issuerName>WHITE MOUNTAINS INSURANCE GROUP LT </issuerName>
        <issuerPrincipalExecutiveOfficeAddress>23 SOUTH MAIN STREET, SUITE 3B, hanover, NH, 03755.</issuerPrincipalExecutiveOfficeAddress>
      </item1>

      <item2>
        <filingPersonName>Neuberger Berman Group LLC
Neuberger Berman Investment Advisers LLC</filingPersonName>        <principalBusinessOfficeOrResidenceAddress>1290 Avenue of the Americas
New York, NY 10104</principalBusinessOfficeOrResidenceAddress>        <citizenship>Delaware</citizenship>      </item2>

        <item3>
				<notApplicableFlag>N</notApplicableFlag>










		<typeOfPersonFiling>OO</typeOfPersonFiling>




      </item3>



    <item4>
    <amountBeneficiallyOwned>121,583

Neuberger Berman Trust Co N.A., Neuberger Berman Trust Co of Delaware N.A., Neuberger Berman Asia Ltd.,
Neuberger Berman Canada ULC, and Neuberger Berman Investment Advisers LLC and certain affiliated persons
may be deemed to beneficially own the securities covered by this report in their various fiduciary capacities by
virtue of the provisions of Exchange Act Rule 13d-3. Neuberger Berman Group LLC, through its subsidiaries
Neuberger Berman Investment Advisers Holdings LLC and Neuberger Trust Holdings LLC controls Neuberger
Berman Trust Co N.A., Neuberger Berman Asia Ltd., Neuberger Berman Canada ULC, Neuberger Berman Trust
Co of Delaware N.A. and Neuberger Berman Investment Advisers LLC and certain affiliated persons.
This report is not an admission that any of these entities are the beneficial owner of the securities covered by this
report and each of Neuberger Berman Group LLC, Neuberger Berman Investment Advisers Holdings LLC,
Neuberger Trust Holdings LLC, Neuberger Berman Trust Co N.A., Neuberger Berman Asia Ltd., Neuberger
Berman Canada ULC, Neuberger Berman Trust Co of Delaware N.A. and Neuberger Berman Investment Advisers
LLC and certain affiliated persons disclaim beneficial ownership of the securities covered by this statement
pursuant to Exchange Act Rule 13d-4.
The information in this filing reports securities of the issuer that may be deemed to be beneficially owned by
Neuberger Berman Group LLC, Neuberger Berman Investment Advisers Holdings LLC, Neuberger Trust Holdings
LLC, Neuberger Berman Trust Co N.A., Neuberger Berman Asia Ltd., Neuberger Berman Canada ULC, Neuberger
Berman Trust Co of Delaware N.A. and Neuberger Berman Investment Advisers LLC ("NBG Filers"). The securities
of the issuer, if any, that may be deemed to be beneficially owned by NB Alternatives Advisers LLC and other
subsidiaries of Neuberger Berman Group LLC that are separated from the NBG Filers by an information barrier in
accordance with SEC Release No. 34-39538 (January 12, 1998) are not reflected in this filing.</amountBeneficiallyOwned>    <classPercent>4.9</classPercent>
      <numberOfSharesPersonHas>
        <solePowerOrDirectToVote>0</solePowerOrDirectToVote>
        <sharedPowerOrDirectToVote>110,283</sharedPowerOrDirectToVote>
        <solePowerOrDirectToDispose>0</solePowerOrDirectToDispose>
        <sharedPowerOrDirectToDispose>121,583</sharedPowerOrDirectToDispose>
      </numberOfSharesPersonHas>
    </item4>


        <item5>

            <notApplicableFlag>N</notApplicableFlag>
        <classOwnership5PercentOrLess>Y</classOwnership5PercentOrLess>

    </item5>


        <item6>
	  	  <notApplicableFlag>Y</notApplicableFlag>
		        </item6>


        <item7>
	  	  <notApplicableFlag>Y</notApplicableFlag>


    </item7>


          <item8>
                <notApplicableFlag>Y</notApplicableFlag>

              </item8>


            <item9>
                <notApplicableFlag>Y</notApplicableFlag>
                      </item9>


      <item10>
                <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>

      </item10>
    </items>


	    <signatureInformation>
      <reportingPersonName>Neuberger Berman Group LLC</reportingPersonName>

      <signatureDetails>
        <signature>Brad Cetron</signature>
        <title>Brad Cetron / Managing Director</title>
        <date>05/07/2026</date>
      </signatureDetails>

    </signatureInformation>
	     <signatureInformation>
      <reportingPersonName>Neuberger Berman Investment Advisers LLC</reportingPersonName>

      <signatureDetails>
        <signature>Brad Cetron</signature>
        <title>Brad Cetron / Managing Director</title>
        <date>05/07/2026</date>
      </signatureDetails>

    </signatureInformation>



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</SEC-DOCUMENT>
