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    <ReturnTs>2020-11-13T14:35:36-06:00</ReturnTs>
    <TaxPeriodEndDt>2019-12-31</TaxPeriodEndDt>
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        <BusinessNameLine1Txt>Foundation Source</BusinessNameLine1Txt>
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      <PreparerUSAddress>
        <AddressLine1Txt>One Hollow Ln Ste 212</AddressLine1Txt>
        <CityNm>Lake Success</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>11042</ZIPCd>
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    <TaxPeriodBeginDt>2019-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>453077311</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>The McSweeney Family Charitable Foundation</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% Foundation Source</InCareOfNm>
      <BusinessNameControlTxt>MCSW</BusinessNameControlTxt>
      <PhoneNum>8008391754</PhoneNum>
      <USAddress>
        <AddressLine1Txt>Foundation Source 501 Silverside Rd</AddressLine1Txt>
        <CityNm>Wilmington</CityNm>
        <StateAbbreviationCd>DE</StateAbbreviationCd>
        <ZIPCd>198091377</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>DANIEL MCSWEENEY</PersonNm>
      <PersonTitleTxt>president</PersonTitleTxt>
      <PhoneNum>8008391754</PhoneNum>
      <SignatureDt>2020-11-10</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
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    <PreparerPersonGrp>
      <PreparerPersonNm>Jeffrey D Haskell</PreparerPersonNm>
      <PTIN>P01345770</PTIN>
      <PhoneNum>8008391754</PhoneNum>
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      <IPAddress>
        <IPv4AddressTxt>67.82.234.252</IPv4AddressTxt>
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    <BuildTS>2021-04-22 16:20:28Z</BuildTS>
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        <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
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        <InterestOnSavNetInvstIncmAmt>114</InterestOnSavNetInvstIncmAmt>
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        <TotalNetInvstIncmAmt>210503</TotalNetInvstIncmAmt>
        <CompOfcrDirTrstRevAndExpnssAmt>0</CompOfcrDirTrstRevAndExpnssAmt>
        <TaxesRevAndExpnssAmt referenceDocumentId="TaxesSchedule">3300</TaxesRevAndExpnssAmt>
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        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
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        <CapitalGainNetIncomeAmt>209231</CapitalGainNetIncomeAmt>
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        <LiableSection4942TaxInd>false</LiableSection4942TaxInd>
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        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <PersonsWithBooksName>
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          <CityNm>Wilmington</CityNm>
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        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
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        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
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        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
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            <CityNm>Wilmington</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
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        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Stephen Alexander</PersonNm>
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            <CityNm>Wilmington</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
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            <ZIPCd>198091377</ZIPCd>
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        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Mary McSweeney</PersonNm>
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            <AddressLine1Txt>Foundation Source 501 Silverside Rd</AddressLine1Txt>
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          <TitleTxt>VP, Dir, Sec</TitleTxt>
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        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Matthew McSweeney</PersonNm>
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            <ZIPCd>198091377</ZIPCd>
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      </UndistributedIncomeGrp>
      <PrivateOperatingFoundationsGrp></PrivateOperatingFoundationsGrp>
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        <ContributingManagerNm>Daniel McSweeney</ContributingManagerNm>
        <ContributingManagerNm>Mary McSweeney</ContributingManagerNm>
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          <RecipientBusinessName>
            <BusinessNameLine1Txt>PASTOR OF ALL HALLOWS CATHOLIC PARISH IN LA JOLLA</BusinessNameLine1Txt>
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          <RecipientUSAddress>
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            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>92037</ZIPCd>
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          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
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        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>Promise2Kids Foundation</BusinessNameLine1Txt>
          </RecipientBusinessName>
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            <AddressLine1Txt>9440 Ruffin Court Ste 2</AddressLine1Txt>
            <CityNm>San Diego</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>92123</ZIPCd>
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          <GrantOrContributionPurposeTxt>general &amp; unrestricted</GrantOrContributionPurposeTxt>
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        <MembershipDuesAndAssmntGrp />
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          <ExclusionAmt>1016</ExclusionAmt>
        </DivAndIntFromSecPartVIIGrp>
        <NetRntlIncmReDebtFincdPropGrp />
        <NetRntlIncmReNotDebtFincdProp />
        <NetRentalIncomePersonalPropGrp />
        <OtherInvestmentIncmPartVIIGrp />
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>85846</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <NetIncomeLossFromSpecialEvtGrp />
        <GrossProfitLossSlsOfInvntryGrp />
        <OtherRevenueDescribedGrp>
          <Desc>K-1 Inc/Loss</Desc>
          <BusinessCd>525990</BusinessCd>
          <UnrelatedBusinessTaxblIncmAmt>5134</UnrelatedBusinessTaxblIncmAmt>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>142</ExclusionAmt>
        </OtherRevenueDescribedGrp>
        <SubtotalsIncmProducingActyGrp>
          <UnrelatedBusinessTaxblIncmAmt>5134</UnrelatedBusinessTaxblIncmAmt>
          <ExclusionAmt>87118</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>92252</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>
    <DepreciationSchedule documentId="DepreciationSch" />
    <InvestmentsCorpStockSchedule documentId="InvestCorpStockSch">
      <InvestmentsCorporateStockGrp>
        <StockNm>BERKSHIRE HATHAWAY INC. CLASS</StockNm>
        <EOYBookValueAmt>296372</EOYBookValueAmt>
        <EOYFMVAmt>341788</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>MASTERCARD INC</StockNm>
        <EOYBookValueAmt>32802</EOYBookValueAmt>
        <EOYFMVAmt>230483</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <InvestmentsOtherSchedule2 documentId="InvOtherSch2">
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>ATEL FUND 14, LLC</CategoryOrItemTxt>
        <BookValueAmt>35967</BookValueAmt>
        <EOYFMVAmt>56700</EOYFMVAmt>
      </InvestmentsOtherGrp>
    </InvestmentsOtherSchedule2>
    <OtherExpensesSchedule documentId="OtherExpensesSch">
      <OtherExpensesScheduleGrp>
        <Desc>Administrative Fees</Desc>
        <RevenueAndExpensesPerBooksAmt>6000</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>6000</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>Bank Charges</Desc>
        <RevenueAndExpensesPerBooksAmt>50</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>50</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>State or Local Filing Fees</Desc>
        <RevenueAndExpensesPerBooksAmt>25</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>25</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherIncomeSchedule2 documentId="OtherIncomeSch2">
      <OtherIncomeDetail>
        <Desc>K-1 Inc/Loss ATEL FUND 14, LLC</Desc>
        <RevenueAndExpensesPerBooksAmt>5276</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>142</NetInvestmentIncomeAmt>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
    <TaxesSchedule documentId="TaxesSchedule">
      <TaxesDetail>
        <CategoryTxt>990-PF Estimated Tax for 2019</CategoryTxt>
        <Amt>3300</Amt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>