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    <ReturnTs>2026-09-10T16:39:03-06:00</ReturnTs>
    <TaxPeriodEndDt>2026-06-30</TaxPeriodEndDt>
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      <PreparerFirmEIN>473476111</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Jacob R McKee CPA LLC</BusinessNameLine1Txt>
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      <PreparerUSAddress>
        <AddressLine1Txt>8901 Tehama Ridge Pkwy Ste 127-132</AddressLine1Txt>
        <CityNm>Fort Worth</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>76177</ZIPCd>
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    <TaxPeriodBeginDt>2025-07-01</TaxPeriodBeginDt>
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      <BusinessName>
        <BusinessNameLine1Txt>THE HARKNESS HOUSE INCORPORATED</BusinessNameLine1Txt>
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      <InCareOfNm>% JESSICA FELLMAN</InCareOfNm>
      <BusinessNameControlTxt>HARK</BusinessNameControlTxt>
      <PhoneNum>6037144864</PhoneNum>
      <USAddress>
        <AddressLine1Txt>410 AMHERST STREET STE 150</AddressLine1Txt>
        <CityNm>NASHUA</CityNm>
        <StateAbbreviationCd>NH</StateAbbreviationCd>
        <ZIPCd>03063</ZIPCd>
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      <PersonNm>JESSICA FELLMAN</PersonNm>
      <PersonTitleTxt>SECRETARY TREASURER</PersonTitleTxt>
      <PhoneNum>6037144864</PhoneNum>
      <SignatureDt>2026-09-04</SignatureDt>
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      <PreparerPersonNm>JACOB MCKEE</PreparerPersonNm>
      <PTIN>P01971759</PTIN>
      <PhoneNum>6823129088</PhoneNum>
      <PreparationDt>2026-09-10</PreparationDt>
      <SelfEmployedInd>X</SelfEmployedInd>
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    <TaxYr>2025</TaxYr>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>HTTPS://WWW.THEHARKNESSHOUSE.ORG/</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>78210</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>200</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>78010</ProgramServiceRevenueAmt>
      <CostOfGoodsSoldAmt>338</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>-338</GrossProfitLossSlsOfInvntryAmt>
      <TotalRevenueAmt>77872</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>38117</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>2233</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>186553</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>3</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>81030</OtherExpensesTotalAmt>
      <TotalExpensesAmt>307936</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-230064</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>-506587</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>-736651</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>18398</BOYAmt>
        <EOYAmt>1521</EOYAmt>
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      <LandAndBuildingsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>176253</BOYAmt>
        <EOYAmt>177510</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>194651</BOYAmt>
        <EOYAmt>179031</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>701238</BOYAmt>
        <EOYAmt>915682</EOYAmt>
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      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>-506587</BOYAmt>
        <EOYAmt>-736651</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>PRIVATE NONPROFIT MIDDLE SCHOOL</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE MISSION OF THE HARKNESS HOUSE IS TO GIVE EVERY STUDENT A SEAT AT THE TABLE WHERE WE INSPIRE INTRINSIC CURIOSITY, FOSTER INDIVIDUAL CREATIVITY, AND PROMOTE INTELLECTUAL RIGOR.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>307936</ProgramServiceExpensesAmt>
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      <TotalProgramServiceExpensesAmt>307936</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JESSICA FELLMAN</PersonNm>
        <TitleTxt>SECRETARY TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>LORI DUMAINE</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>UMESH RAO</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>NATHAN FELLMAN</PersonNm>
        <TitleTxt>CHAIR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.25</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN CASSIDY</PersonNm>
        <TitleTxt>VICE CHAIR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JEANO DEMERS</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>true</MadeLoansToFromOfficersInd>
      <LoansToFromOfficersAmt referenceDocumentId="IRS990ScheduleL-208-Copy1">712697</LoansToFromOfficersAmt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>JESSICA FELLMAN</PersonNm>
        <USAddress>
          <AddressLine1Txt>410 AMHERST STREET Ste 150</AddressLine1Txt>
          <CityNm>NASHUA</CityNm>
          <StateAbbreviationCd>NH</StateAbbreviationCd>
          <ZIPCd>03063</ZIPCd>
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        <PhoneNum>6037144864</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd referenceDocumentId="IRS990ScheduleE-135-Copy1">true</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
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      <SchoolInd>X</SchoolInd>
    </IRS990ScheduleA>
    <IRS990ScheduleE documentId="IRS990ScheduleE">
      <NondiscriminatoryPolicyStmtInd>true</NondiscriminatoryPolicyStmtInd>
      <PolicyStmtInBrochuresEtcInd>true</PolicyStmtInBrochuresEtcInd>
      <PlcyPblczdViaBroadcastMediaInd>false</PlcyPblczdViaBroadcastMediaInd>
      <MaintainRacialCompRecsInd>true</MaintainRacialCompRecsInd>
      <MaintainScholarshipsRecsInd>true</MaintainScholarshipsRecsInd>
      <MaintainCpyOfBrochuresEtcInd>true</MaintainCpyOfBrochuresEtcInd>
      <MaintainCpyOfAllSolInd>true</MaintainCpyOfAllSolInd>
      <DiscriminateRaceStdntsRghtsInd>false</DiscriminateRaceStdntsRghtsInd>
      <DiscriminateRaceAdmissPlcyInd>false</DiscriminateRaceAdmissPlcyInd>
      <DiscriminateRaceEmplmFcultyInd>false</DiscriminateRaceEmplmFcultyInd>
      <DiscriminateRaceSchsInd>false</DiscriminateRaceSchsInd>
      <DiscriminateRaceEducPlcyInd>false</DiscriminateRaceEducPlcyInd>
      <DiscriminateRaceUseOfFcltsInd>false</DiscriminateRaceUseOfFcltsInd>
      <DiscriminateRaceAthltProgInd>false</DiscriminateRaceAthltProgInd>
      <DiscriminateRaceOtherActyInd>false</DiscriminateRaceOtherActyInd>
      <GovernmentFinancialAidRcvdInd>false</GovernmentFinancialAidRcvdInd>
      <GovernmentFinancialAidRvkdInd>false</GovernmentFinancialAidRvkdInd>
      <ComplianceWithRevProc7550Ind>true</ComplianceWithRevProc7550Ind>
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    <IRS990ScheduleL documentId="IRS990ScheduleL">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>NATHAN FELLMAN</PersonNm>
        <RelationshipWithOrgTxt>MARRIED TO BOARD MEM</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>125000</OriginalPrincipalAmt>
        <BalanceDueAmt>125000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>ERIC FELLMAN</PersonNm>
        <RelationshipWithOrgTxt>BOARD MEMBER</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>100000</OriginalPrincipalAmt>
        <BalanceDueAmt>100000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>NATHAN FELLMAN</PersonNm>
        <RelationshipWithOrgTxt>MARRIED TO BOARD MEM</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>50000</OriginalPrincipalAmt>
        <BalanceDueAmt>50000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>DONNA MICHOLAIDES</PersonNm>
        <RelationshipWithOrgTxt>MOTHER OF BOARD MEMB</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>100000</OriginalPrincipalAmt>
        <BalanceDueAmt>100000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>DONNA MICHOLAIDES</PersonNm>
        <RelationshipWithOrgTxt>MOTHER OF BOARD MEMB</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>50000</OriginalPrincipalAmt>
        <BalanceDueAmt>50000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>BHG</PersonNm>
        <RelationshipWithOrgTxt>BOARD MEMBER</RelationshipWithOrgTxt>
        <LoanPurposeTxt>INITIAL FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>130922</OriginalPrincipalAmt>
        <BalanceDueAmt>111333</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
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      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>JESSICAL FELLMAN</PersonNm>
        <RelationshipWithOrgTxt>BOARD MEMBER</RelationshipWithOrgTxt>
        <LoanPurposeTxt>ONGOING FUNDING</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <BalanceDueAmt>176364</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>712697</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of other expenses Part I line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Description AmountDepreciation from 4562 8,300MERCHANT FEES 248INTEREST EXPENSE 32,225BOOKS AND EDUCATION MATERIALS 4,698INSURANCE 11,396SCHOOL EVENTS AND TRIPS 1,856OFFICE AND OTHER ADMIN 10,633TRAVEL 2,025AWARDS 1,600BAD DEBT 8,049</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of other assets Part II line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>Category Beginning of Year End of YearRECEIVABLES 31,299 31,899INVENTORY 1,009 1,666FIXED ASSETS 131,403 131,403SECURITY DEPOSIT 12,542 12,542</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of total liabilities Part II line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>Category Beginning of Year End of YearCREDIT CARDS 87,536 123,916ACCOUNTS PAYABLE 0 38,952CURRENT LOANS 290,537 412,697DEFERRED TUITION 23,165 23,765LONG TERM LOANS 300,000 300,000FUND BALANCE ADJUSTMENT 0 16,352</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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