﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2024v5.2">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-11-12T09:13:06-06:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>042571780</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>AAFCPAS INC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>50 WASHINGTON STREET</AddressLine1Txt>
        <CityNm>WESTBOROUGH</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>01581</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>853810338</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CASTLE SQUARE TENANTS ORGANIZATION 2020</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>CHARITABLE TRUST</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>CAST</BusinessNameControlTxt>
      <PhoneNum>6173578548</PhoneNum>
      <USAddress>
        <AddressLine1Txt>476 TREMONT STREET</AddressLine1Txt>
        <CityNm>BOSTON</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02116</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JONATHAN KLEIN</PersonNm>
      <PersonTitleTxt>CHAIR</PersonTitleTxt>
      <PhoneNum>6173578548</PhoneNum>
      <SignatureDt>2025-11-11</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>1</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>JOYCE RIPIANZI CPA</PreparerPersonNm>
      <PTIN>P00548581</PTIN>
      <PhoneNum>5083669100</PhoneNum>
      <PreparationDt>2025-11-11</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="6">
    <IRS990 documentId="RetDoc1038000001" referenceDocumentId="RetDoc1044400001">
      <PrincipalOfficerNm>JONATHAN KLEIN</PrincipalOfficerNm>
      <USAddress>
        <AddressLine1Txt>476 TREMONT STREET</AddressLine1Txt>
        <CityNm>BOSTON</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02116</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>445750</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>0</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>WWW.CSTOBOSTON.ORG</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>2020</FormationYr>
      <LegalDomicileStateCd>MA</LegalDomicileStateCd>
      <ActivityOrMissionDesc>CASTLE SQUARE TENANTS ORGANIZATION 2020 CHARITABLE TRUST (THE 'TRUST') WAS FORMED TO SUPPORT THE ACTIVITIES OF CASTLE SQUARE TENANTS ORGANIZATION, INC. (CSTO) AS WELL AS OTHER ORGANIZATION'S WHICH ENHANCE THE EDUCATIONAL AND CULTURAL EXPERIENCES, AFFORDABLE HOUSING OR ECONOMIC OPPORTUNITIES FOR LOW INCOME RESIDENTS OF THE SOUTH END AND CHINATOWN NEIGHBORHOODS OF BOSTON AND THE GREATER BOSTON AREA.</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>7</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>7</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <TotalVolunteersCnt>7</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>0</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>0</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>0</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>73665</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>445750</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>0</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>0</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>0</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>73665</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>445750</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>0</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>354555</CYGrantsAndSimilarPaidAmt>
      <PYBenefitsPaidToMembersAmt>0</PYBenefitsPaidToMembersAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>0</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>0</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>0</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>73665</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>91195</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>73665</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>445750</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>0</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>0</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>19381203</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>20897102</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>19381103</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>20897002</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>100</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>100</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>CASTLE SQUARE TENANTS ORGANIZATION 2020 CHARITABLE TRUST (THE 'TRUST') WAS FORMED TO SUPPORT THE ACTIVITIES OF CASTLE SQUARE TENANTS ORGANIZATION, INC. (CSTO) AS WELL AS OTHER ORGANIZATION'S WHICH ENHANCE THE EDUCATIONAL AND CULTURAL EXPERIENCES, AFFORDABLE HOUSING OR ECONOMIC OPPORTUNITIES FOR LOW INCOME RESIDENTS OF THE SOUTH END AND CHINATOWN NEIGHBORHOODS OF BOSTON AND THE GREATER BOSTON AREA.</MissionDesc>
      <SignificantNewProgramSrvcInd>0</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>0</SignificantChangeInd>
      <ExpenseAmt>445750</ExpenseAmt>
      <GrantAmt>354555</GrantAmt>
      <RevenueAmt>445750</RevenueAmt>
      <Desc>THE TRUST'S PRIMARY ACTIVITY WILL BE MAKING GRANTS IN FURTHERANCE OF ITS CHARITABLE PURPOSES. SPECIFICALLY, THE TRUST WILL MAKE GRANTS TO ORGANIZATIONS THAT ARE TAX-EXEMPT UNDER CODE SECTION 501(C)3 WHICH, AS REQUIRED BY THE DECLARATION OF TRUST, INCLUDES THE CASTLE SQUARE TENANTS ORGANIZATION, INC. THE TRUSTEES MAY SELECT ORGANIZATIONS TO RECEIVE GRANTS CONSISTENT WITH THE TRUST'S STATED PURPOSES. THE TRUST WILL MAINTAIN DOCUMENTATION REGARDING ITS APPROVAL OF ANY GRANTS IT MAKES. THE TRUST WILL KEEP STANDARD ACCOUNTING RECORDS RELATING TO THE GRANTS IT MAKES. ALL GRANTS MADE BY THE TRUST SHALL BE SUBJECT TO OVERSIGHT AND REPORTING REQUIREMENTS AS DESCRIBED IN GRANT LETTER AGREEMENT INCLUDED WITH THE APPLICATION.THIS ACTIVITY WILL CONSTITUTE 100% OF THE TRUST'S PLANNED ACTIVITIES.</Desc>
      <TotalProgramServiceExpensesAmt>445750</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="RetDoc1039100001">1</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd>0</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd referenceDocumentId="RetDoc1040000001">0</DonorAdvisedFundInd>
      <ConservationEasementsInd referenceDocumentId="RetDoc1040000001">0</ConservationEasementsInd>
      <CollectionsOfArtInd referenceDocumentId="RetDoc1040000001">0</CollectionsOfArtInd>
      <CreditCounselingInd referenceDocumentId="RetDoc1040000001">0</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>0</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="RetDoc1040000001">0</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="RetDoc1040000001">1</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd referenceDocumentId="RetDoc1040000001">0</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd referenceDocumentId="RetDoc1040000001">0</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="RetDoc1040000001">1</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd referenceDocumentId="RetDoc1040000001">1</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="RetDoc1040000001">0</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd referenceDocumentId="RetDoc1040000001">1</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <ForeignActivitiesInd>0</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd>0</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>0</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>0</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>0</FundraisingActivitiesInd>
      <GamingActivitiesInd>0</GamingActivitiesInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <GrantsToOrganizationsInd referenceDocumentId="RetDoc1041900001">1</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd referenceDocumentId="RetDoc1041900001">0</GrantsToIndividualsInd>
      <ScheduleJRequiredInd>0</ScheduleJRequiredInd>
      <TaxExemptBondsInd>0</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd>0</PYExcessBenefitTransInd>
      <LoanOutstandingInd>0</LoanOutstandingInd>
      <GrantToRelatedPersonInd>0</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>0</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd>0</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>0</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>0</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>0</DeductibleArtContributionInd>
      <TerminateOperationsInd>0</TerminateOperationsInd>
      <PartialLiquidationInd>0</PartialLiquidationInd>
      <DisregardedEntityInd referenceDocumentId="RetDoc1043400001">0</DisregardedEntityInd>
      <RelatedEntityInd referenceDocumentId="RetDoc1043400001">1</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd referenceDocumentId="RetDoc1043400001">0</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd referenceDocumentId="RetDoc1043400001">0</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>1</ScheduleORequiredInd>
      <IRPDocumentCnt>2</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>1</BackupWthldComplianceInd>
      <EmployeeCnt>0</EmployeeCnt>
      <UnrelatedBusIncmOverLimitInd>0</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>0</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>0</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>0</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>0</Form8282PropertyDisposedOfInd>
      <RcvFndsToPayPrsnlBnftCntrctInd>0</RcvFndsToPayPrsnlBnftCntrctInd>
      <PayPremiumsPrsnlBnftCntrctInd>0</PayPremiumsPrsnlBnftCntrctInd>
      <IndoorTanningServicesInd>0</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>0</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>0</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>7</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>7</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>0</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>0</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>0</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>0</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>0</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>0</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>0</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>1</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>1</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>0</OfficerMailingAddressInd>
      <LocalChaptersInd>0</LocalChaptersInd>
      <Form990ProvidedToGvrnBodyInd>1</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>1</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>1</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>1</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>0</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>0</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>0</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>0</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>0</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>MA</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>JONATHAN KLEIN</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>6173578548</PhoneNum>
        <USAddress>
          <AddressLine1Txt>476 TREMONT STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02116</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <NoListedPersonsCompensatedInd>X</NoListedPersonsCompensatedInd>
      <Form990PartVIISectionAGrp>
        <PersonNm>JONATHAN KLEIN</PersonNm>
        <TitleTxt>CHAIR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ANN MOY</PersonNm>
        <TitleTxt>VICE CHAIR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KATHRYN MCHUGH</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>VINCENT O'DONNELL</PersonNm>
        <TitleTxt>CLERK</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TERRANCE WOOLFORK</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>YVONNE HOLMES</PersonNm>
        <TitleTxt>DIRECTOR (UNTIL 10/2024)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>CHU HUANG</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>VERNON MILLS</PersonNm>
        <TitleTxt>DIRECTOR (AS OF 10/2024)</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>0</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>0</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>MANAGEMENT FEE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>445750</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>445750</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>445750</TotalProgramServiceRevenueAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>445750</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>445750</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>354555</TotalAmt>
        <ProgramServicesAmt>354555</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>40477</TotalAmt>
        <ProgramServicesAmt>40477</ProgramServicesAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>48534</TotalAmt>
        <ProgramServicesAmt>48534</ProgramServicesAmt>
      </FeesForServicesOtherGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>2139</TotalAmt>
        <ProgramServicesAmt>2139</ProgramServicesAmt>
      </ConferencesMeetingsGrp>
      <OtherExpensesGrp>
        <Desc>BANK SERVICE CHARGES</Desc>
        <TotalAmt>45</TotalAmt>
        <ProgramServicesAmt>45</ProgramServicesAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>445750</TotalAmt>
        <ProgramServicesAmt>445750</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>10735</BOYAmt>
        <EOYAmt>134235</EOYAmt>
      </CashNonInterestBearingGrp>
      <AccountsReceivableGrp>
        <BOYAmt>8554</BOYAmt>
        <EOYAmt>27780</EOYAmt>
      </AccountsReceivableGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>17649220</BOYAmt>
        <EOYAmt>18465953</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>1712694</BOYAmt>
        <EOYAmt>2269134</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <TotalAssetsGrp>
        <BOYAmt>19381203</BOYAmt>
        <EOYAmt>20897102</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>7672</BOYAmt>
        <EOYAmt>7780</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <GrantsPayableGrp>
        <EOYAmt>20000</EOYAmt>
      </GrantsPayableGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>19373431</BOYAmt>
        <EOYAmt>20869222</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>19381103</BOYAmt>
        <EOYAmt>20897002</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>100</BOYAmt>
        <EOYAmt>100</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>100</BOYAmt>
        <EOYAmt>100</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>19381203</BOYAmt>
        <EOYAmt>20897102</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>0</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <SupportingOrganization509a3Ind>X</SupportingOrganization509a3Ind>
      <SupportingOrgType1Ind>X</SupportingOrgType1Ind>
      <SupportedOrganizationsCnt>1</SupportedOrganizationsCnt>
      <SupportedOrgInformationGrp>
        <SupportedOrganizationName>
          <BusinessNameLine1Txt>CASTLE SQUARE TENANTS ORGANIZATION INC</BusinessNameLine1Txt>
        </SupportedOrganizationName>
        <EIN>043016145</EIN>
        <OrganizationTypeCd>10</OrganizationTypeCd>
        <GoverningDocumentListedInd>1</GoverningDocumentListedInd>
        <SupportAmt>0</SupportAmt>
        <OtherSupportAmt>0</OtherSupportAmt>
      </SupportedOrgInformationGrp>
      <SupportedOrganizationsTotalCnt>1</SupportedOrganizationsTotalCnt>
      <SupportSumAmt>0</SupportSumAmt>
      <OtherSupportSumAmt>0</OtherSupportSumAmt>
      <Form990SchASupportingOrgGrp>
        <ListedByNameGoverningDocInd>1</ListedByNameGoverningDocInd>
        <SuprtOrgNoIRSDeterminationInd>0</SuprtOrgNoIRSDeterminationInd>
        <SupportedOrgSectionC456Ind>0</SupportedOrgSectionC456Ind>
        <SupportedOrgNotOrganizedUSInd>0</SupportedOrgNotOrganizedUSInd>
        <OrganizationChangeSuprtOrgInd>0</OrganizationChangeSuprtOrgInd>
        <SupportNonSupportedOrgInd>0</SupportNonSupportedOrgInd>
        <PaymentSubstantialContribtrInd>0</PaymentSubstantialContribtrInd>
        <LoanDisqualifiedPersonInd>0</LoanDisqualifiedPersonInd>
        <ControlledDisqualifiedPrsnInd>0</ControlledDisqualifiedPrsnInd>
        <DisqualifiedPrsnControllIntInd>0</DisqualifiedPrsnControllIntInd>
        <DisqualifiedPrsnOwnrIntInd>0</DisqualifiedPrsnOwnrIntInd>
        <ExcessBusinessHoldingsRulesInd>0</ExcessBusinessHoldingsRulesInd>
        <ContributionControllerInd>0</ContributionControllerInd>
        <ContributionFamilyInd>0</ContributionFamilyInd>
        <Contribution35ControlledInd>0</Contribution35ControlledInd>
      </Form990SchASupportingOrgGrp>
      <Form990SchAType1SuprtOrgGrp>
        <PowerAppointMajorityDirTrstInd>1</PowerAppointMajorityDirTrstInd>
        <OperateBenefitNonSuprtOrgInd>0</OperateBenefitNonSuprtOrgInd>
      </Form990SchAType1SuprtOrgGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>HEDGE FUND</Desc>
        <BookValueAmt>2269134</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>2269134</TotalBookValueSecuritiesAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>DUE TO RELATED PARTY</Desc>
        <Amt>20869222</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>20869222</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 2020 TRUST IS A NONPROFIT ORGANIZATION AS DESCRIBED IN SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND IS EXEMPT FROM FEDERAL AND STATE INCOME TAXES ON TRADE OR BUSINESS PROFITS GENERATED BY ACTIVITIES RELATED TO THE 2020 TRUST'S EXEMPT FUNCTION. THE 2020 TRUST MAY BE SUBJECT TO FEDERAL AND STATE INCOME TAXES FOR PROFITS GENERATED FROM TRADE OR BUSINESS ACTIVITIES UNRELATED TO THE TRUST'S EXEMPT FUNCTION. AS OF DECEMBER 31, 2024, MANAGEMENT BELIEVES THAT THE 2020 TRUST HAS NOT GENERATED ANY UNRELATED BUSINESS TAXABLE INCOME.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>TENANTS' DEVELOPMENT CORPORATION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1 APPLETON STREET SUITE 301</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02116</ZIPCd>
        </USAddress>
        <RecipientEIN>237044492</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT YOUTH PEER LEADERSHIP AFTER SCHOOL PROGRAM (YPLASP)</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>URBANITY DANCE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>725 HARRISON AVE 100</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02118</ZIPCd>
        </USAddress>
        <RecipientEIN>452295295</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT URBANITY DANCE ACCESS FOR ALL (A4A) PROGRAM</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BUSINESS UNITED IN INVESTING LENDING AND DEVELOPMENT</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 3316</AddressLine1Txt>
          <CityNm>REDWOOD CITY</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94064</ZIPCd>
        </USAddress>
        <RecipientEIN>943386695</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT CREATING EDUCATIONAL EQUITY IN GREATER BOSTON THROUGH ENTREPRENEURIAL EDUCATION.</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNITED SOUTH END SETTLEMENTS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>48 RUTLAND STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02118</ZIPCd>
        </USAddress>
        <RecipientEIN>042104280</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>40000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT USES CLUB 48 (CHILDCARE AND AFTER-SCHOOL)</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE BOSTON HIGHER EDUCATION RESOURCE CENTER INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>62 NORTHAMPTION STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02118</ZIPCd>
        </USAddress>
        <RecipientEIN>823215739</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>40000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT PASSPORT TO COLLEGE AND ALUMNI SUCCESS PROGRAMS-LOWER ROXBURY, SOUTH END, AND CHINATOWN SITES.</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BOSTON CHINATOWN NEIGHBORHOOD CENTER</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>38 ASH STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02111</ZIPCd>
        </USAddress>
        <RecipientEIN>237209691</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>40000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT BCNC YOUTH CENTER</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CHICA INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1266 FURNACE BROOK PARKWAYSTE 410</AddressLine1Txt>
          <CityNm>QUINCY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02169</ZIPCd>
        </USAddress>
        <RecipientEIN>453866647</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>40000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT CHICA PROJECT AT BLACKSTONE COMMUNITY CENTER</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MORE THAN WORDS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>56 FELTON STREET</AddressLine1Txt>
          <CityNm>WALTHAM</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02453</ZIPCd>
        </USAddress>
        <RecipientEIN>042784985</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>40000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT MORE THAN WORDS YOUTH BOSTON CAREER AND READINESS SUPPORTS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>SOCCER UNITY PROJECT</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>128 UNION PARK STREET UNIT 1</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02118</ZIPCd>
        </USAddress>
        <RecipientEIN>900623475</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>30000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT SOUTH END SOCCER YOUTH PROGRAMS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>YOUTHBUILD BOSTON INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>27 CENTRE STREET</AddressLine1Txt>
          <CityNm>ROXBURY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02119</ZIPCd>
        </USAddress>
        <RecipientEIN>043080098</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>35000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT THE DESIGNER-ENGAGING HIGH SCHOOL YOUTH IN DESIGN PROFESSIONS (1884 WASHINGTON STREET, BOSTON MA 02118).</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WRITE BOSTON INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>555 ARMORY STREET SUITE 3R</AddressLine1Txt>
          <CityNm>JAMAICA PLAIN</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02130</ZIPCd>
        </USAddress>
        <RecipientEIN>461255108</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>39555</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT CATALYZING YOUTH AGENCY &amp; MEDIA LITERACY: A WRITE BOSTON &amp; ST. STEPHEN'S YOUTH PROGRAMS PARTNERSHIP (419 SHAWMUT AVE, BOSTON MA 02118).</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>PHILANTHROPY MA INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>133 FEDERAL STREET SUITE 802</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02110</ZIPCd>
        </USAddress>
        <RecipientEIN>042457605</RecipientEIN>
        <IRCSectionDesc>501(C)3</IRCSectionDesc>
        <CashGrantAmt>20000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>GRANT FOR SPONSORSHIP OF GMA FOUNDATIONS' FUNDER COMMUNITY'S 17/25 FUND FOR YOUNG ADULTS</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>12</Total501c3OrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUST HAS ESTABLISHED REPORTING REQUIREMENTS TO MONITOR THE USE OF GRANT FUNDS. GRANTEE PARTNERS MUST SUBMIT BOTH A SIX-MONTH REPORT AND A FINAL REPORT THAT DESCRIBES THE USE OF GRANT FUNDS, MAJOR PROGRAM ACCOMPLISHMENTS, LESSONS LEARNED, AND THE IMPACT OVER THE GRANT PERIOD. THE TRUST'S INDEPENDENT CONSULTANT PERFORMS AN INITIAL REVIEW OF THE REPORTS, AND A SECONDARY REVIEW IS PERFORMED BY THE CHAIRMAN OF THE BOARD AND THE TRUSTEES. SUMMARY INTERIM REPORTS ARE REVIEWED BY THE TRUSTEES AS PART OF THE EVALUATION FOR SECOND YEAR GRANT AWARDS FOR REPEAT GRANTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>REVIEWED AND APPROVED BY THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUST HAS ADOPTED THIS CONFLICT OF INTEREST POLICY TO IDENTIFY AND LIMIT THE EFFECT OF ANY POSSIBLE CONFLICT BETWEEN THE PERSONAL INTERESTS OF DIRECTORS AND OFFICERS AND THE INTEREST OF THE TRUST. THE PURPOSE OF THIS POLICY IS TO ENSURE THAT DECISIONS ABOUT CORPORATE OPERATIONS AND THE USE AND DISPOSITIONS OF CORPORATE ASSETS ARE MADE SOLELY IN TERMS OF BENEFITS TO THE TRUST AND ARE NOT INFLUENCED BY ANY PRIVATE PROFIT OR OTHER PERSONAL BENEFIT TO THE INDIVIDUALS AFFILIATED WITH THE TRUST WHO TAKE PART IN THE DECISION. ANNUAL DISCLOSURE STATEMENTS DUTY TO COMPLETE QUESTIONNAIRE. EACH TRUSTEE AND KEY PERSON SHALL COMPLETE A CONFLICT OF INTEREST QUESTIONNAIRE WHEN ASSUMING THE RELEVANT POSITION AND ANNUALLY THEREAFTER. THE QUESTIONNAIRE SHALL BE IN THE FORM APPROVED BY THE TRUSTEES. DUTY TO UPDATE INFORMATION. EACH DIRECTOR, OFFICER, OR KEY PERSON SHALL PROMPTLY ADVISE THE SECRETARY OR DESIGNATED COMPLIANCE OFFICER OF ANY CHANGES TO THE INFORMATION PROVIDED IN THAT INDIVIDUAL'S LAST COMPLETED CONFLICT OF INTEREST QUESTIONNAIRE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DOCUMENTS ARE AVAILABLE UPON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTING: PROGRAM SERVICE EXPENSES 48,534. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 48,534.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS IS RESPONSIBLE FOR THE SELECTION OF AN INDEPENDENT AUDITOR AND OVERSIGHT OF THE AUDIT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART VI, SECTION B, LINES 13 &amp; 14:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUST IS A NEWLY CREATED ORGANIZATION AND IS IN THE PROCESS OF DEVELOPING AND IMPLEMENTING A WHISTLEBLOWER POLICY. THE ORGANIZATION IS ALSO IN THE PROCESS OF DEVELOPING AND IMPLEMENTING A WRITTEN DOCUMENT RETENTION AND DESTRUCTION POLICY.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>CASTLE SQUARE TENANTS ORGANIZATION INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>476 TREMONT STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02116</ZIPCd>
        </USAddress>
        <EIN>043016145</EIN>
        <PrimaryActivitiesTxt>AFFORDABLE HOUSING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>LINE 10</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>1</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>1</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>1</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>