﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2024v5.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-05-13T08:18:14-07:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>201983628</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Snyder Cahoon &amp; Co PLLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>80 S Main Street Ste 102</AddressLine1Txt>
        <CityNm>Hanover</CityNm>
        <StateAbbreviationCd>NH</StateAbbreviationCd>
        <ZIPCd>03755</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>030363118</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>THE JACK AND DOROTHY BYRNE FOUNDATION</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>INC</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>JACK</BusinessNameControlTxt>
      <PhoneNum>6036437799</PhoneNum>
      <USAddress>
        <AddressLine1Txt>80 SOUTH MAIN 102</AddressLine1Txt>
        <CityNm>HANOVER</CityNm>
        <StateAbbreviationCd>NH</StateAbbreviationCd>
        <ZIPCd>03755</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ROBERT E SNYDER</PersonNm>
      <PersonTitleTxt>Sec/TREAS/DIR</PersonTitleTxt>
      <SignatureDt>2025-05-13</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>MICHAEL L CAHOON</PreparerPersonNm>
      <PTIN>P01227183</PTIN>
      <PhoneNum>6036437799</PhoneNum>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="10">
    <IRS990PF documentId="IRS990PF" referenceDocumentId="GeneralExplanation BinaryAttachment.1" softwareId="24020490" softwareVersionNum="2024v5.1">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>1643751</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
        <ContriRcvdRevAndExpnssAmt>11395020</ContriRcvdRevAndExpnssAmt>
        <DividendsRevAndExpnssAmt>6982</DividendsRevAndExpnssAmt>
        <DividendsNetInvstIncmAmt>6982</DividendsNetInvstIncmAmt>
        <NetGainSaleAstRevAndExpnssAmt>12372363</NetGainSaleAstRevAndExpnssAmt>
        <GrossSalesPriceAmt>12678546</GrossSalesPriceAmt>
        <CapGainNetIncmNetInvstIncmAmt>12372363</CapGainNetIncmNetInvstIncmAmt>
        <TotalRevAndExpnssAmt>23774365</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>12379345</TotalNetInvstIncmAmt>
        <OthEmplSlrsWgsRevAndExpnssAmt>38017</OthEmplSlrsWgsRevAndExpnssAmt>
        <OthEmplSlrsWgsDsbrsChrtblAmt>38017</OthEmplSlrsWgsDsbrsChrtblAmt>
        <AccountingFeesRevAndExpnssAmt referenceDocumentId="AccountingFeesSchedule">31782</AccountingFeesRevAndExpnssAmt>
        <AccountingFeesChrtblPrpsAmt>31782</AccountingFeesChrtblPrpsAmt>
        <OtherProfFeesRevAndExpnssAmt referenceDocumentId="OtherProfessionalFeesSchedule">1530</OtherProfFeesRevAndExpnssAmt>
        <OtherProfFeesDsbrsChrtblAmt>1530</OtherProfFeesDsbrsChrtblAmt>
        <TaxesRevAndExpnssAmt referenceDocumentId="TaxesSchedule">203188</TaxesRevAndExpnssAmt>
        <OtherExpensesRevAndExpnssAmt referenceDocumentId="OtherExpensesSchedule AmortizationSchedule">38107</OtherExpensesRevAndExpnssAmt>
        <OtherExpensesNetInvstIncmAmt>934</OtherExpensesNetInvstIncmAmt>
        <OtherExpensesDsbrsChrtblAmt>37173</OtherExpensesDsbrsChrtblAmt>
        <TotOprExpensesRevAndExpnssAmt>312624</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>934</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>108502</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>12046100</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>12046100</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>12358724</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>934</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>12154602</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>11415641</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>12378411</NetInvestmentIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <SavAndTempCashInvstBOYAmt>593912</SavAndTempCashInvstBOYAmt>
        <SavAndTempCashInvstEOYAmt>962831</SavAndTempCashInvstEOYAmt>
        <SavAndTempCashInvstEOYFMVAmt>962831</SavAndTempCashInvstEOYFMVAmt>
        <CorporateStockBOYAmt>1085250</CorporateStockBOYAmt>
        <CorporateStockEOYAmt referenceDocumentId="InvestmentsCorpStockSchedule">680920</CorporateStockEOYAmt>
        <CorporateStockEOYFMVAmt>680920</CorporateStockEOYFMVAmt>
        <TotalAssetsBOYAmt>1679162</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>1643751</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>1643751</TotalAssetsEOYFMVAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
        <RetainedEarningBOYAmt>1679162</RetainedEarningBOYAmt>
        <RetainedEarningEOYAmt>1643751</RetainedEarningEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>1679162</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>1643751</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>1679162</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>1643751</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>1679162</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>11415641</ExcessRevenueOverExpensesAmt>
        <OtherIncreasesAmt referenceDocumentId="OtherIncreasesSchedule">9700</OtherIncreasesAmt>
        <SubtotalAmt>13104503</SubtotalAmt>
        <OtherDecreasesAmt referenceDocumentId="OtherDecreasesSchedule">11460752</OtherDecreasesAmt>
        <TotNetAstOrFundBalancesEOYAmt>1643751</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>2012-08-22</AcquiredDt>
          <SoldDt>2024-01-11</SoldDt>
          <GrossSalesPriceAmt>1107586</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>256143</CostOrOtherBasisAmt>
          <GainOrLossAmt>851443</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>851443</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-02-01</SoldDt>
          <GrossSalesPriceAmt>1166293</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1160733</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1160733</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-02-13</SoldDt>
          <GrossSalesPriceAmt>1195078</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1189518</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1189518</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-03-26</SoldDt>
          <GrossSalesPriceAmt>1247487</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1241927</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1241927</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-05-16</SoldDt>
          <GrossSalesPriceAmt>1234245</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1228685</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1228685</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-06-28</SoldDt>
          <GrossSalesPriceAmt>1223056</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1217496</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1217496</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-08-21</SoldDt>
          <GrossSalesPriceAmt>1346863</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1341303</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1341303</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-10-01</SoldDt>
          <GrossSalesPriceAmt>1364979</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1359419</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1359419</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-10-30</SoldDt>
          <GrossSalesPriceAmt>1367326</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1361766</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1361766</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>2 BERKSHIRE HATHAWAY - A</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <AcquiredDt>1987-01-05</AcquiredDt>
          <SoldDt>2024-11-25</SoldDt>
          <GrossSalesPriceAmt>1425633</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>5560</CostOrOtherBasisAmt>
          <GainOrLossAmt>1420073</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1420073</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapitalGainNetIncomeAmt>12372363</CapitalGainNetIncomeAmt>
      </CapGainsLossTxInvstIncmDetail>
      <ExciseTaxBasedOnInvstIncmGrp>
        <InvestmentIncomeExciseTaxAmt>172060</InvestmentIncomeExciseTaxAmt>
        <SubtotalAmt>172060</SubtotalAmt>
        <TaxBasedOnInvestmentIncomeAmt>172060</TaxBasedOnInvestmentIncomeAmt>
        <EstimatedPlusOvpmtIncmTxAmt>214630</EstimatedPlusOvpmtIncmTxAmt>
        <TotalPaymentsAndCreditsAmt>214630</TotalPaymentsAndCreditsAmt>
        <Form2220AttachedInd referenceDocumentId="IRS2220">X</Form2220AttachedInd>
        <OverpaymentAmt>42570</OverpaymentAmt>
        <AppliedToESTaxAmt>42570</AppliedToESTaxAmt>
      </ExciseTaxBasedOnInvstIncmGrp>
      <StatementsRegardingActyGrp>
        <LegislativePoliticalActyInd>false</LegislativePoliticalActyInd>
        <MoreThan100SpentInd>false</MoreThan100SpentInd>
        <Form1120POLFiledInd>false</Form1120POLFiledInd>
        <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
        <ChangesToArticlesOrBylawsInd>false</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
        <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
        <Section508eRqrSatisfiedInd>true</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>true</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>DE</OrgReportOrRegisterStateCd>
        <OrgReportOrRegisterStateCd>NH</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>false</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>false</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
        <PersonsWithBooksName>
          <BusinessNameLine1Txt>ROBERT E SNYDER</BusinessNameLine1Txt>
        </PersonsWithBooksName>
        <PhoneNum>6036437799</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1Txt>80 S MAIN STREET</AddressLine1Txt>
          <CityNm>HANOVER</CityNm>
          <StateAbbreviationCd>NH</StateAbbreviationCd>
          <ZIPCd>03755</ZIPCd>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>false</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>false</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>false</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
        <ActsFailToQlfyAsExceptionsInd>false</ActsFailToQlfyAsExceptionsInd>
        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
        <InfluenceElectionInd>false</InfluenceElectionInd>
        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>true</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>false</NoncharitablePurposeInd>
        <TransactionsFailToQlfyAsExcInd>false</TransactionsFailToQlfyAsExcInd>
        <MaintainedExpenditureRspnsInd referenceDocumentId="ExpenditureResponsibilityState">true</MaintainedExpenditureRspnsInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
        <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>DOROTHY M BYRNE</PersonNm>
          <USAddress>
            <AddressLine1Txt>3 LARAMIE ROAD BOX 599</AddressLine1Txt>
            <CityNm>ETNA</CityNm>
            <StateAbbreviationCd>NH</StateAbbreviationCd>
            <ZIPCd>03750</ZIPCd>
          </USAddress>
          <TitleTxt>Pres/DIR/MEMBER</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>20.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>ROBERT E SNYDER</PersonNm>
          <USAddress>
            <AddressLine1Txt>80 S MAIN STREET 102</AddressLine1Txt>
            <CityNm>HANOVER</CityNm>
            <StateAbbreviationCd>NH</StateAbbreviationCd>
            <ZIPCd>03755</ZIPCd>
          </USAddress>
          <TitleTxt>Sec/TREAS/DIR</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>KATIE COLLINS</PersonNm>
          <USAddress>
            <AddressLine1Txt>713 DAIRY HILL ROAD</AddressLine1Txt>
            <CityNm>SOUTH ROYALTON</CityNm>
            <StateAbbreviationCd>VT</StateAbbreviationCd>
            <ZIPCd>05068</ZIPCd>
          </USAddress>
          <TitleTxt>ASST TO PRES.</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>32.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>38017</CompensationAmt>
        </CompensationHighestPaidEmplGrp>
        <CompOfHghstPdCntrctOrNONETxt>NONE</CompOfHghstPdCntrctOrNONETxt>
      </OfficerDirTrstKeyEmplInfoGrp>
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>2907018</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>1270324</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>4177342</TotalFMVOfUnusedAssetsAmt>
        <ReductionClaimedAmt>0</ReductionClaimedAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>4177342</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>62660</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>4114682</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>205734</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <MinimumInvestmentReturnAmt>205734</MinimumInvestmentReturnAmt>
        <TaxBasedOnInvestmentIncomeAmt>172060</TaxBasedOnInvestmentIncomeAmt>
        <TotalTaxAmt>172060</TotalTaxAmt>
        <DistributableBeforeAdjAmt>33674</DistributableBeforeAdjAmt>
        <DistributableBeforeDedAmt>33674</DistributableBeforeDedAmt>
        <DistributableAsAdjustedAmt>33674</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <PFQualifyingDistributionsGrp>
        <ExpensesAndContributionsAmt>12154602</ExpensesAndContributionsAmt>
        <QualifyingDistributionsAmt>12154602</QualifyingDistributionsAmt>
      </PFQualifyingDistributionsGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>33674</DistributableAsAdjustedAmt>
        <ExcessDistributionCyovYr5Amt>12428122</ExcessDistributionCyovYr5Amt>
        <ExcessDistributionCyovYr4Amt>14582380</ExcessDistributionCyovYr4Amt>
        <ExcessDistributionCyovYr3Amt>10166022</ExcessDistributionCyovYr3Amt>
        <ExcessDistributionCyovYr2Amt>10916918</ExcessDistributionCyovYr2Amt>
        <ExcessDistributionCyovYr1Amt>10999968</ExcessDistributionCyovYr1Amt>
        <TotalExcessDistributionCyovAmt>59093410</TotalExcessDistributionCyovAmt>
        <QualifyingDistributionsAmt>12154602</QualifyingDistributionsAmt>
        <TreatedAsDistriFromCorpusAmt>0</TreatedAsDistriFromCorpusAmt>
        <AppliedToCurrentYearAmt>33674</AppliedToCurrentYearAmt>
        <RemainingDistriFromCorpusAmt>12120928</RemainingDistriFromCorpusAmt>
        <TotalCorpusAmt>71214338</TotalCorpusAmt>
        <UndistributedIncomeCYAmt>0</UndistributedIncomeCYAmt>
        <ExcessDistriCyovFromYr5Amt>12428122</ExcessDistriCyovFromYr5Amt>
        <ExcessDistriCyovToNextYrAmt>58786216</ExcessDistriCyovToNextYrAmt>
        <ExcessFromYear4Amt>14582380</ExcessFromYear4Amt>
        <ExcessFromYear3Amt>10166022</ExcessFromYear3Amt>
        <ExcessFromYear2Amt>10916918</ExcessFromYear2Amt>
        <ExcessFromYear1Amt>10999968</ExcessFromYear1Amt>
        <ExcessFromCurrentYearAmt>12120928</ExcessFromCurrentYearAmt>
      </UndistributedIncomeGrp>
      <SupplementaryInformationGrp>
        <ContributingManagerNm>DOROTHY M BYRNE</ContributingManagerNm>
        <ApplicationSubmissionInfoGrp>
          <RecipientPersonNm>THE JACK AND DOROTHY BYRNE FOUNDATI</RecipientPersonNm>
          <RecipientUSAddress>
            <AddressLine1Txt>BOX 599</AddressLine1Txt>
            <CityNm>ETNA</CityNm>
            <StateAbbreviationCd>NH</StateAbbreviationCd>
            <ZIPCd>03750</ZIPCd>
          </RecipientUSAddress>
          <RecipientPhoneNum>6036437799</RecipientPhoneNum>
          <FormAndInfoAndMaterialsTxt>SEND LETTER OUTLINING YOUR PARTICULAR NEEDS TO DOROTHY BYRNE AND IT WILL BE REVIEWED. NO TELEPHONE CALLS PLEASE.</FormAndInfoAndMaterialsTxt>
          <SubmissionDeadlinesTxt>NONE</SubmissionDeadlinesTxt>
          <RestrictionsOnAwardsTxt>THE FOUNDATION'S PRIMARY AREAS OF INTEREST FOR GIFTS/GRANTS ARE:1. GENERAL SUPPORT OF THE DARTMOUTH COLLEGE COMMUNITY2. CANCER RESEARCH3. GENERAL PHILANTHROPY - THE MAJORITY OF THIS WILL BE DIRECTED TO THE UPPER VALLEY OF NEW HAMPSHIRE AND VERMONT.</RestrictionsOnAwardsTxt>
        </ApplicationSubmissionInfoGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientPersonNm>SEE STATEMENT 11</RecipientPersonNm>
          <RecipientUSAddress>
            <AddressLine1Txt>VARIOUS</AddressLine1Txt>
            <CityNm>various</CityNm>
            <StateAbbreviationCd>NH</StateAbbreviationCd>
            <ZIPCd>03755</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>NON-PR</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>SUPPORT OF NON-PROFIT PURPOSE OF ORGANIZATION</GrantOrContributionPurposeTxt>
          <Amt>12046100</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>12046100</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <DividendsAndInterestFromSecDtl>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>6982</ExclusionAmt>
        </DividendsAndInterestFromSecDtl>
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>12372363</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>12379345</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>12379345</TotalIncomeProducingActyAmt>
      </AnalysisIncomeProducingActyGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>false</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>false</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>false</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>false</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>false</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="24020490" softwareVersionNum="2024v5.1">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
        <ContributorNum>1</ContributorNum>
        <ContributorPersonNm>DOROTHY BYRNE</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>3 LARAMIE RD</AddressLine1Txt>
          <CityNm>ETNA</CityNm>
          <StateAbbreviationCd>NH</StateAbbreviationCd>
          <ZIPCd>03750</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>5482395</TotalContributionsAmt>
        <PersonContributionInd>X</PersonContributionInd>
        <NoncashContributionInd>X</NoncashContributionInd>
      </ContributorInformationGrp>
      <ContributorInformationGrp>
        <ContributorNum>2</ContributorNum>
        <ContributorPersonNm>DOROTHY BYRNE</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>3 LARAMIE RD</AddressLine1Txt>
          <CityNm>ETNA</CityNm>
          <StateAbbreviationCd>NH</StateAbbreviationCd>
          <ZIPCd>03750</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>5912625</TotalContributionsAmt>
        <NoncashContributionInd>X</NoncashContributionInd>
      </ContributorInformationGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>10 shares of Berkshire Hathaway A (BRKA) CUSIP# G62185106</NoncashPropertyDesc>
        <FairMarketValueAmt>5449980</FairMarketValueAmt>
        <ReceivedDt>2024-01-02</ReceivedDt>
      </NonCashPropertyContributionGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>2</ContributorNum>
        <NoncashPropertyDesc>9 shares of Berkshire Hathaway A (BRKA)CUSIP# G62185106</NoncashPropertyDesc>
        <FairMarketValueAmt>5912625</FairMarketValueAmt>
        <ReceivedDt>2024-07-16</ReceivedDt>
      </NonCashPropertyContributionGrp>
    </IRS990ScheduleB>
    <AccountingFeesSchedule documentId="AccountingFeesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <AccountingFeesDetail>
        <CategoryTxt>ACCOUNTING FEES</CategoryTxt>
        <Amt>31782</Amt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>31782</DisbursementsCharitablePrpsAmt>
      </AccountingFeesDetail>
    </AccountingFeesSchedule>
    <ExpenditureResponsibilityStmt documentId="ExpenditureResponsibilityState" softwareId="24020490" softwareVersionNum="2024v5.1">
      <ExpenditureResponsibilityGrp>
        <PersonNm>SPORTS VENUE FOUNDATION DBA UVAC</PersonNm>
        <USAddress>
          <AddressLine1Txt>100 ARBORETUM LANE</AddressLine1Txt>
          <CityNm>WHITE RIVER JCT</CityNm>
          <StateAbbreviationCd>VT</StateAbbreviationCd>
          <ZIPCd>05001</ZIPCd>
        </USAddress>
        <GrantDt>2024-02-09</GrantDt>
        <GrantAmt>30000</GrantAmt>
        <PurposeOfGrantTxt>SUPPORT OF PALS PROGRAM</PurposeOfGrantTxt>
        <ExpendedByGranteeAmt>16523</ExpendedByGranteeAmt>
        <AnyDiversionByGranteeTxt>No</AnyDiversionByGranteeTxt>
        <DatesOfReportsByGranteeTxt>VARIOUS</DatesOfReportsByGranteeTxt>
        <VerificationDt>2024-12-31</VerificationDt>
        <ResultsOfVerificationTxt>THE SPORTS VENUE FOUNDATION IS A PRIVATE OPERATING FOUNDATION THAT OPERATES AN AQUATIC CENTER. THE SPORTS VENUE FOUNDATION HAS PROVIDED THE JACK AND DOROTHY BYRNE FOUNDATION WITH A DETAILED REPORT OF ITS USE OF THE CURRENT YEAR GRANT FOR THE PALS PROGRAM. THE PALS PROGRAM IS A EXERCISE RECOVERY PROGRAM FOR BREAST CANCER PATIENTS.$16,523 WAS SPENT FROM THE CURRENT YEAR GRANT, AND $13,477 FROM THE CURRENT YEARS GRANTS WILL BE CARRIED FORWARD TO 2025, AND WE WILL UPDATED THROUGHOUT THE YEAR ON THE USE OF THE REMAINING FUNDS.</ResultsOfVerificationTxt>
      </ExpenditureResponsibilityGrp>
    </ExpenditureResponsibilityStmt>
    <InvestmentsCorpStockSchedule documentId="InvestmentsCorpStockSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <InvestmentsCorporateStockGrp>
        <StockNm>BERKSHIRE HATHAWAY - A</StockNm>
        <EOYBookValueAmt>680920</EOYBookValueAmt>
        <EOYFMVAmt>680920</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <OtherDecreasesSchedule documentId="OtherDecreasesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <OtherDecreasesDetail>
        <Desc>TAX GAIN OVER BOOK GAIN ON DONATED SECURITES</Desc>
        <Amt>11436805</Amt>
      </OtherDecreasesDetail>
      <OtherDecreasesDetail>
        <Desc>UNREALIZED DEPRECIATION</Desc>
        <Amt>23947</Amt>
      </OtherDecreasesDetail>
    </OtherDecreasesSchedule>
    <OtherExpensesSchedule documentId="OtherExpensesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <OtherExpensesScheduleGrp>
        <Desc>EMPLOYEE BENEFITS</Desc>
        <RevenueAndExpensesPerBooksAmt>37173</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>37173</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>INSURANCE</Desc>
        <RevenueAndExpensesPerBooksAmt>301</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>301</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>STATE FILING FEES</Desc>
        <RevenueAndExpensesPerBooksAmt>75</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>75</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>STATUTORY REPRESENTATION FEE</Desc>
        <RevenueAndExpensesPerBooksAmt>558</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>558</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherIncreasesSchedule documentId="OtherIncreasesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <OtherIncreasesDetail>
        <Desc>VOIDED CHECKS FROM PRIOR YEARS</Desc>
        <Amt>9700</Amt>
      </OtherIncreasesDetail>
    </OtherIncreasesSchedule>
    <OtherProfessionalFeesSchedule documentId="OtherProfessionalFeesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>PAYROLL SERVICE</CategoryTxt>
        <Amt>1530</Amt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>1530</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="TaxesSchedule" softwareId="24020490" softwareVersionNum="2024v5.1">
      <TaxesDetail>
        <CategoryTxt>FEDERAL TAX ON CAPITAL GAINS</CategoryTxt>
        <Amt>200000</Amt>
      </TaxesDetail>
      <TaxesDetail>
        <CategoryTxt>PAYROLL TAXES</CategoryTxt>
        <Amt>3188</Amt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>