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      <TotalContributionsAmt>4203859</TotalContributionsAmt>
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      <NetGainOrLossInvestmentsGrp>
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      <CompCurrentOfcrDirectorsGrp>
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      <PensionPlanContributionsGrp>
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        <ManagementAndGeneralAmt>46130</ManagementAndGeneralAmt>
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      <FeesForServicesAccountingGrp>
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        <ManagementAndGeneralAmt>85529</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>69813</ManagementAndGeneralAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>77239</ProgramServicesAmt>
        <ManagementAndGeneralAmt>18605</ManagementAndGeneralAmt>
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      <InformationTechnologyGrp>
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        <ProgramServicesAmt>88364</ProgramServicesAmt>
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      <OccupancyGrp>
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        <ManagementAndGeneralAmt>204315</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>133159</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7898</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>14505</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>12960</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>12754</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>3820388</ProgramServicesAmt>
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      <TotalFunctionalExpensesGrp>
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        <EOYAmt>31064</EOYAmt>
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        <EOYAmt>6511182</EOYAmt>
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        <EOYAmt>78952804</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-3952015</ReconcilationRevenueExpnssAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
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        <ContributorBusinessName>
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        </ContributorBusinessName>
        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION ADOPTED THE ACCOUNTING STANDARD ON ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES, WHICH ADDRESSES THE DETERMINATION OF WHETHER TAX BENEFITS CLAIMED OR EXPECTED TO BE CLAIMED ON A TAX RETURN SHOULD BE RECORDED IN THE FINANCIAL STATEMENTS. UNDER THIS POLICY, THE ORGANIZATION MAY RECOGNIZE THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE LIKELY THAN NOT THAT THE TAX POSITION WOULD BE SUSTAINED ON EXAMINATION BY TAXING AUTHORITIES, BASED ON THE TECHNICAL MERITS OF THE POSITION. MANAGEMENT HAS EVALUATED THE ORGANIZATIONS TAX POSITIONS, AND HAS CONCLUDED THAT THE ORGANIZATION HAS TAKEN NO UNCERTAIN TAX POSITIONS THAT REQUIRE ADJUSTMENT TO THE FINANCIAL STATEMENTS TO COMPLY WITH PROVISIONS OF THIS GUIDANCE.</ExplanationTxt>
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        <DeferredCompensationFlngOrgAmt>8757</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>22557</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>197124</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>YIXUAN QIU</PersonNm>
        <TitleTxt>ASSOCIATE DIRECTOR, RESEARCH PROGRAM</TitleTxt>
        <BaseCompensationFilingOrgAmt>123640</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>24720</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>5572</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>7697</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>7606</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>169235</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>DISCRETIONARY BONUSES WERE PAID IN 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>ANTHONY ACCORSI</PersonNm>
        <RelationshipWithOrgTxt>VENTURE PARTNER, HIGHLY COMPENSATED EMPLOYEE</RelationshipWithOrgTxt>
        <LoanPurposeTxt>PURCHASE OF A PRINCIPAL RESIDENCE TO RELOCATE TO MARYLAND</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>130500</OriginalPrincipalAmt>
        <BalanceDueAmt>130500</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>MATT TREMBLAY</PersonNm>
        <RelationshipWithOrgTxt>CEO AND BOARD MEMBER</RelationshipWithOrgTxt>
        <LoanPurposeTxt>PURCHASE OF A PRINCIPAL RESIDENCE TO RELOCATE TO MARYLAND</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>500000</OriginalPrincipalAmt>
        <BalanceDueAmt>500000</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>630500</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE NO COMMITTEES OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A DRAFT COPY OF THE 990 WILL BE PROVIDED TO BLACKBIRD LEADERSHIP AS WELL AS THE BOARD OF DIRECTORS FOR COMMENT AND REVIEW PRIOR TO FILING. BLACKBIRD LEADERSHIP IS AN INTEGRAL PART OF PREPARING THE 990 FORM ALONGSIDE THE 990 PREPARERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE HAS A CONFLICT OF INTEREST POLICY THAT REQUIRES DIRECTORS, OFFICERS, KEY EMPLOYEES AND OTHER DESIGNATED INDIVIDUALS TO DISCLOSE IF THEY HAVE A PERSONAL INTEREST OR RELATIONSHIP IN A TRANSACTION INVOLVING THE INSTITUTE, WHETHER DIRECTLY OR INDIRECTLY THROUGH A FAMILY MEMBER, CONTROLLED ENTITY OR BUSINESS OR INVESTMENT RELATIONSHIP. ANY INDIVIDUAL WITH A PERSONAL INTEREST OR RELATIONSHIP IN A TRANSACTION INVOLVING THE INSTITUTE MUST BE RECUSED FROM THE DISCUSSIONS AND APPROVAL FOR THAT TRANSACTION. THE TRANSACTION MUST BE REVIEWED BY DISINTERESTED PERSONS WHO DO NOT HAVE A PERSONAL INTEREST IN THE TRANSACTION UNDER REVIEW, AND SUCH DISINTERESTED PERSONS MAY APPROVE THE TRANSACTION AFTER DETERMINING THAT THE TERMS ARE FAIR AND REASONABLE TO THE INSTITUTE. THE INSTITUTE MAY ALSO CONSIDER WHETHER THERE ARE ALTERNATIVE TRANSACTIONS OR ARRANGEMENTS THAT ARE REASONABLY AVAILABLE UNDER THE CIRCUMSTANCES THAT DO NOT PRESENT A POTENTIAL CONFLICT OF INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>INDUSTRY DATA WAS UTILIZED TO DETERMINE COMPENSATION BENCHMARKS FOR THE CEO AND OTHER KEY EMPLOYEES. EXTERNAL CONSULTANTS, SUCH AS A FRACTIONAL CFO AND HUMAN RESOURCES PROFESSIONALS, WERE INCLUDED IN THE PROCESS TO DETERMINE APPROPRIATE AND REASONABLE COMPENSATION PACKAGES AND PRACTICES. THE CEO'S COMPENSATION WAS REVIEWED AND APPROVED BY THE BOARD. THIS PROCESS WAS INITIALLY COMPLETED DURING THE ONBOARDING OF THE CEO AND OTHER KEY PERSONNEL. SINCE THEN, EACH OF THESE INDIVIDUALS HAS RECEIVED ONLY MODEST ANNUAL COST-OF-LIVING ADJUSTMENTS, AND AS A RESULT, THE REVIEW PROCESS HAS NOT BEEN REVISITED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST FOR THE SAME PERIOD OF DISCLOSURE AS SET FORTH IN SECTION 6104(D).</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>