<?xml version="1.0" encoding="utf-8"?>
<!--Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 24-September-2026 [04:03:22] {PM}-->
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    <appinfo>
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        <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#GovernmentsOnly" roleURI="http://xbrl.sec.gov/rxp/role/GovernmentsOnly"  />
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        <link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rxp/role/ByProject" >
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          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_rxp_AllCountriesDomain_142920632" xlink:to="loc_country_GB_142920642" order="103" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#rxp_AllGovernmentsMember" xlink:label="loc_rxp_AllGovernmentsMember_142920634" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_BlytheNorthSeaTransitionAuthorityMember" xlink:label="loc_BRKA_BlytheNorthSeaTransitionAuthorityMember_142920639" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_rxp_AllGovernmentsMember_142920634" xlink:to="loc_BRKA_BlytheNorthSeaTransitionAuthorityMember_142920639" order="104" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
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        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rxp/role/ProjectsOnly" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#rxp_AllProjectsMember" xlink:label="loc_rxp_AllProjectsMember_142920622" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_BlytheP1736Member" xlink:label="loc_BRKA_BlytheP1736Member_142920626" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllProjectsMember_142920622" xlink:to="loc_BRKA_BlytheP1736Member_142920626" order="100" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_SouthwarkP1915Member" xlink:label="loc_BRKA_SouthwarkP1915Member_142920627" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllProjectsMember_142920622" xlink:to="loc_BRKA_SouthwarkP1915Member_142920627" order="101" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_ElgoodP2260Member" xlink:label="loc_BRKA_ElgoodP2260Member_142920628" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllProjectsMember_142920622" xlink:to="loc_BRKA_ElgoodP2260Member_142920628" order="102" />
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rxp/role/GovernmentsOnly" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#rxp_AllGovernmentsMember" xlink:label="loc_rxp_AllGovernmentsMember_142920635" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_BlytheNorthSeaTransitionAuthorityMember" xlink:label="loc_BRKA_BlytheNorthSeaTransitionAuthorityMember_142920639" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllGovernmentsMember_142920635" xlink:to="loc_BRKA_BlytheNorthSeaTransitionAuthorityMember_142920639" order="103" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_SouthwarkNorthSeaTransitionAuthorityMember" xlink:label="loc_BRKA_SouthwarkNorthSeaTransitionAuthorityMember_142920640" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllGovernmentsMember_142920635" xlink:to="loc_BRKA_SouthwarkNorthSeaTransitionAuthorityMember_142920640" order="104" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_ElgoodNorthSeaTransitionAuthorityMember" xlink:label="loc_BRKA_ElgoodNorthSeaTransitionAuthorityMember_142920641" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllGovernmentsMember_142920635" xlink:to="loc_BRKA_ElgoodNorthSeaTransitionAuthorityMember_142920641" order="105" />
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rxp/role/SegmentsOnly" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#rxp_AllSegmentsMember" xlink:label="loc_rxp_AllSegmentsMember_142920672" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_NorthernPowergridMember" xlink:label="loc_BRKA_NorthernPowergridMember_142920673" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllSegmentsMember_142920672" xlink:to="loc_BRKA_NorthernPowergridMember_142920673" order="106" />
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rxp/role/ResourcesOnly" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd#rxp_AllResourcesMember" xlink:label="loc_rxp_AllResourcesMember_142920680" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_NaturalGasMember" xlink:label="loc_BRKA_NaturalGasMember_142920681" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllResourcesMember_142920680" xlink:to="loc_BRKA_NaturalGasMember_142920681" order="107" />
        </link:definitionLink>
        <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link" >
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_BlytheP1736Member" xlink:label="loc_brka_BlytheP1736Member" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_BlytheP1736Member" xml:lang="en-US">Blythe P1736 [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_BlytheP1736Member" xml:lang="en-US">Blythe (P1736)</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_BlytheP1736Member" xlink:to="lab_brka_BlytheP1736Member" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_ElgoodP2260Member" xlink:label="loc_brka_ElgoodP2260Member" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_ElgoodP2260Member" xml:lang="en-US">Elgood P2260 [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_ElgoodP2260Member" xml:lang="en-US">Elgood (P2260)</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_ElgoodP2260Member" xlink:to="lab_brka_ElgoodP2260Member" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_SouthwarkP1915Member" xlink:label="loc_brka_SouthwarkP1915Member" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_SouthwarkP1915Member" xml:lang="en-US">Southwark P1915 [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_SouthwarkP1915Member" xml:lang="en-US">Southwark (P1915)</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_SouthwarkP1915Member" xlink:to="lab_brka_SouthwarkP1915Member" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_GB" xlink:label="loc_country_GB" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_country_GB" xml:lang="en-US">UNITED KINGDOM</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_country_GB" xml:lang="en-US">United Kingdom</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_GB" xlink:to="lab_country_GB" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_BlytheNorthSeaTransitionAuthorityMember" xlink:label="loc_brka_BlytheNorthSeaTransitionAuthorityMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_BlytheNorthSeaTransitionAuthorityMember" xml:lang="en-US">Blythe North Sea Transition Authority [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_BlytheNorthSeaTransitionAuthorityMember" xml:lang="en-US">Blythe North Sea Transition Authority</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_BlytheNorthSeaTransitionAuthorityMember" xlink:to="lab_brka_BlytheNorthSeaTransitionAuthorityMember" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_ElgoodNorthSeaTransitionAuthorityMember" xlink:label="loc_brka_ElgoodNorthSeaTransitionAuthorityMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_ElgoodNorthSeaTransitionAuthorityMember" xml:lang="en-US">Elgood North Sea Transition Authority [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_ElgoodNorthSeaTransitionAuthorityMember" xml:lang="en-US">Elgood North Sea Transition Authority</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_ElgoodNorthSeaTransitionAuthorityMember" xlink:to="lab_brka_ElgoodNorthSeaTransitionAuthorityMember" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_SouthwarkNorthSeaTransitionAuthorityMember" xlink:label="loc_brka_SouthwarkNorthSeaTransitionAuthorityMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_SouthwarkNorthSeaTransitionAuthorityMember" xml:lang="en-US">Southwark North Sea Transition Authority [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_SouthwarkNorthSeaTransitionAuthorityMember" xml:lang="en-US">Southwark North Sea Transition Authority</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_SouthwarkNorthSeaTransitionAuthorityMember" xlink:to="lab_brka_SouthwarkNorthSeaTransitionAuthorityMember" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_NaturalGasMember" xlink:label="loc_brka_NaturalGasMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_NaturalGasMember" xml:lang="en-US">Natural Gas [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_NaturalGasMember" xml:lang="en-US">Natural Gas</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_NaturalGasMember" xlink:to="lab_brka_NaturalGasMember" />
          <link:loc xlink:type="locator" xlink:href="brka-20251231.xsd#brka_NorthernPowergridMember" xlink:label="loc_brka_NorthernPowergridMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_brka_NorthernPowergridMember" xml:lang="en-US">Northern Powergrid [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_brka_NorthernPowergridMember" xml:lang="en-US">Northern Powergrid</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_brka_NorthernPowergridMember" xlink:to="lab_brka_NorthernPowergridMember" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/snj/2026/snj-2026.xsd#snj_CF-UK" xlink:label="loc_snj_CF-UK" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_snj_CF-UK" xml:lang="en-US">CF-UK</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_snj_CF-UK" xlink:to="lab_snj_CF-UK" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/snj/2026/snj-2026.xsd#snj_GB-ENG" xlink:label="loc_snj_GB-ENG" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_snj_GB-ENG" xml:lang="en-US">GB-ENG</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_snj_GB-ENG" xlink:to="lab_snj_GB-ENG" />
        </link:labelLink>
      </link:linkbase>
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
  <import namespace="http://xbrl.org/2014/extensible-enumerations" schemaLocation="http://www.xbrl.org/2014/extensible-enumerations.xsd" />
  <import namespace="http://xbrl.sec.gov/country-def/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026_def.xsd" />
  <import namespace="http://xbrl.sec.gov/snj-def/2026" schemaLocation="https://xbrl.sec.gov/snj/2026/snj-2026_def.xsd" />
  <import namespace="http://xbrl.org/2020/extensible-enumerations-2.0" schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd" />
  <import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd" />
  <import namespace="http://xbrl.sec.gov/currency/2026" schemaLocation="https://xbrl.sec.gov/currency/2026/currency-2026.xsd" />
  <import namespace="http://xbrl.sec.gov/snj/2026" schemaLocation="https://xbrl.sec.gov/snj/2026/snj-2026.xsd" />
  <import namespace="http://xbrl.sec.gov/rxp/2026" schemaLocation="https://xbrl.sec.gov/rxp/2026/rxp-2026.xsd" />
  <import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd" />
  <element name="BlytheP1736Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_BlytheP1736Member" substitutionGroup="xbrli:item" />
  <element name="ElgoodP2260Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_ElgoodP2260Member" substitutionGroup="xbrli:item" />
  <element name="SouthwarkP1915Member" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_SouthwarkP1915Member" substitutionGroup="xbrli:item" />
  <element name="BlytheNorthSeaTransitionAuthorityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_BlytheNorthSeaTransitionAuthorityMember" substitutionGroup="xbrli:item" />
  <element name="ElgoodNorthSeaTransitionAuthorityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_ElgoodNorthSeaTransitionAuthorityMember" substitutionGroup="xbrli:item" />
  <element name="SouthwarkNorthSeaTransitionAuthorityMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_SouthwarkNorthSeaTransitionAuthorityMember" substitutionGroup="xbrli:item" />
  <element name="NaturalGasMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_NaturalGasMember" substitutionGroup="xbrli:item" />
  <element name="NorthernPowergridMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="brka_NorthernPowergridMember" substitutionGroup="xbrli:item" />
</schema>
