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        <BeginningYearBalanceAmt>9350009</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>-51115</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>9298894</EndYearBalanceAmt>
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      <BoardDesignatedBalanceEOYPct>0.35500</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.55200</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.09300</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>1</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>132063</OtherCostOrOtherBasisAmt>
        <BookValueAmt>132063</BookValueAmt>
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        <DepreciationAmt>17289428</DepreciationAmt>
        <BookValueAmt>14012219</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>15176287</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>9602150</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>1466286</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>1466286</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>8135864</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>25000</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>-97147</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>-72147</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>8063717</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>8840058</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>97147</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>97147</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>8742911</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>25000</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>25000</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>8767911</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUDEAU INSTITUTE ENDOWMENT CONSISTS OF THREE FUNDS ESTABLISHED FOR A VARIETY OF PURPOSES, WHICH CONTINUES TO SUPPORT THE MAIN OBJECTIVE AND MISSION OF CONDUCTING BIOMEDICAL RESEARCH. THE TERM ENDOWMENT ARE THOSE ASSETS NOT SUBJECT TO DONOR-IMPOSED STIPULATIONS, WHICH MAY BE DESIGNATED FOR SPECIFIC PURPOSE BY ELECTION OF THE BOARD OF TRUSTEES. THE BOARD DESIGNATED (QUASI) ENDOWMENT PROVIDES EARNED INCOME IN SUPPORT OF THE INSTITUTE DIRECTOR. INCOME EARNED IN EXCESS OF THE STATED PURPOSE IS AVAILABLE FOR GENERAL OPERATIONS. THE PERMANENTLY RESTRICTED ENDOWMENT IS TO BE MAINTAINED IN PERPETUITY TO GENERATE INCOME FOR THE INSTITUTES OPERATIONAL NEEDS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE FILES FORM 990 ANNUALLY WITH THE INTERNAL REVENUE SERVICE. WHEN ANNUAL RETURNS ARE FILED, SOME TAX POSITIONS TAKEN ARE HIGHLY CERTAIN TO BE SUSTAINED UPON EXAMINATION BY THE TAXING AUTHORITIES, WHILE OTHER TAX POSITIONS ARE SUBJECT TO UNCERTAINTY ABOUT THE TECHNICAL MERITS OF THE POSITION OR AMOUNT OF THE POSITION'S TAX BENEFIT THAT WOULD ULTIMATELY BE SUSTAINED. MANAGEMENT EVALUATED THE INSTITUTE'S TAX POSITIONS AND CONCLUDED THAT THE INSTITUTE HAD TAKEN NO TAX POSITIONS THAT REQUIRED ADJUSTMENT IN ITS FINANCIAL STATEMENTS AS OF DECEMBER 31, 2019 AND 2018.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>RENTAL EXPENSE -97,147.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>RENTAL EXPENSE 97,147.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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        <PersonNm>ATSUO KUKI PHD</PersonNm>
        <TitleTxt>PRESIDENT, DIRECTOR, AND TRUSTEE</TitleTxt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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        <PersonNm>WILLIAM CHAPIN</PersonNm>
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        <PersonNm>MARCY BLACKMAN</PersonNm>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9626</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>22586</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>192651</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PERRIN BABCOCK</PersonNm>
        <TitleTxt>PRINCIPAL INVESTIGATOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>138000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>8280</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20954</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>167234</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>UPON REVIEW OF THE IRS FORM 990 BY THE PRESIDENT AND DIRECTOR , THE CHIEF ADMINISTRATIVE OFFICER AND CONTROLLER, AND THE AUDIT COMMITTEE, THE FORM 990 IS THEN FORWARDED TO ALL MEMBERS OF THE BOARD OF TRUSTEES AND OFFICIALLY FILED WITH THE INTERNAL REVENUE SERVICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, THE OFFICERS, DIRECTORS, AND MEMBERS OF THE BOARD OF TRUSTEES RECEIVE A COPY OF THE TRUDEAU INSTITUTE CONFLICT OF INTEREST POLICY. EACH PERSON IS REQUIRED TO SUBMIT A SIGNED CERTIFICATION THAT THEY WILL READ, UNDERSTAND, AND AGREE TO COMPLY WITH THE POLICY. IF THERE IS A DISCLOSURE, THE BOARD OF TRUSTEES WILL ASCERTAIN THE VALIDITY OF THE POTENTIAL CONFLICT AND FOLLOW POLICY FOR COMPLIANCE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION FOR THE DIRECTOR AND CHIEF ADMINISTRATIVE OFFICER IS REVIEWED ANNUALLY AGAINST THE AIRI INSTITUTE ANNUAL SALARY SURVEY TO MAKE SURE SALARIES ARE IN LINE. THE PROCESS INCLUDES THE USE OF COMPARABLE COMPENSATION FOR THE SAME POSITION IN SIMILAR ORGANIZATIONS, WITH REVIEW AND APPROVAL BY THE EXECUTIVE COMMITTEE OF THE BOARD OF TRUSTEES. THE PROCESS FOR DETERMINING COMPENSATION FOR ALL OFFICERS IS COMPLETED ANNUALLY. DETERMINATION IS BASED UPON BENCHMARK DATA FROM SIMILAR ORGANIZATIONS AND REQUIRES REVIEW AND APPROVAL BY THE DIRECTOR AND THE BOARD OF TRUSTEES COMPENSATION COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>TRUDEAU INSTITUTE PROVIDES THE PUBLIC DIRECT ACCESS TO THE MOST RECENT AUDITED FINANCIAL STATEMENTS AND FORM 990 THROUGH THE ORGANIZATION'S WEBSITE. THE FINANCIAL STATEMENTS ARE ALSO PROVIDED TO ALL REGUALTORY AGENCIES, THE FEDERAL AND STATE GOVERNMENTS AND UPON REQUEST FROM VARIOUS INTERESTED PARTIES. FINANCIAL STATEMENTS, GOVERNING DOCUMENTS, AND INSTITUTE POLICIES ARE IN THE CARE OF THE TREASURER AND SECRETARY AND ARE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>TRUDEAU INSTITUTE PROVIDES THE PUBLIC DIRECT ACCESS TO THE MOST RECENT AUDITED FINANCIAL STATEMENTS THROUGH THE ORGANIZATION'S WEBSITE. THE FINANCIAL STATEMENTS ARE ALSO PROVIDED TO ALL REGULATORY AGENCIES, THE FEDERAL AND STATE GOVERNMENTS AND UPON REQUEST FROM VARIOUS INTERESTED PARTIES. FINANCIAL STATEMENTS, GOVERNING DOCUMENTS, AND INSTITUTE POLICIES ARE IN THE CARE OF THE TREASURER AND SECRETARY AND ARE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>