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      <Form990PartVIISectionAGrp>
        <PersonNm>Jack David</PersonNm>
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        <PersonNm>Thomas J Donohue</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Michael Kassen</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Shinya Katanozaka</PersonNm>
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      <Form990PartVIISectionAGrp>
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        <PersonNm>Laurence C Leeds Jr</PersonNm>
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        <FormAndLineReferenceDesc>Schedule A, Part II, Line 10, Explanation of Other Income:</FormAndLineReferenceDesc>
        <ExplanationTxt>Fundraising income - 2020 Amount: $ 5,680. 2021 Amount: $ 26,600. 2022 Amount: $ 25,200. 2023 Amount: $ 34,400. 2024 Amount: $ 52,200.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
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        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
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    </IRS990ScheduleB>
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      <InclEscrowCustodialAcctLiabInd>1</InclEscrowCustodialAcctLiabInd>
      <ExplanationProvidedInd>X</ExplanationProvidedInd>
      <CYEndwmtFundGrp>
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        <ContributionsAmt>13349</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>12675702</InvestmentEarningsOrLossesAmt>
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        <EndYearBalanceAmt>93499661</EndYearBalanceAmt>
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      <CYMinus1YrEndwmtFundGrp>
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        <ContributionsAmt>184161</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>13098538</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>3634027</OtherExpendituresAmt>
        <EndYearBalanceAmt>84776645</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>81147894</BeginningYearBalanceAmt>
        <ContributionsAmt>7147063</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>-9178984</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>3988000</OtherExpendituresAmt>
        <EndYearBalanceAmt>75127973</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>68738213</BeginningYearBalanceAmt>
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        <InvestmentEarningsOrLossesAmt>15744176</InvestmentEarningsOrLossesAmt>
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        <EndYearBalanceAmt>81147894</EndYearBalanceAmt>
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        <EndYearBalanceAmt>68738213</EndYearBalanceAmt>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
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      <OtherAssetsOrgGrp>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <ExpensesNotRptFinclStmtAmt>7140</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>The Institute holds funds for the Center for Religious Freedom (the "Center"), which transferred its programs and operations to the Institute effective January 1, 2007. The investment account is treated as agency funds by the Institute.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board-Designated Fund (Quasi-Endowment) supports Hudson's Stern Chair and other operating expenses. The Japan Chair Endowment supports the operating expenses of Hudson's Japan Chair.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Management has evaluated the Institute's tax positions and concluded that the Institute's financial statements do not include any uncertain tax positions.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Fundraising expenses 315,926.</ExplanationTxt>
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    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="RetDoc1041200001">
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      <EmailSolicitationsInd>X</EmailSolicitationsInd>
      <PhoneSolicitationsInd>X</PhoneSolicitationsInd>
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      <AgrmtProfFundraisingActyInd>1</AgrmtProfFundraisingActyInd>
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          <BusinessNameLine1Txt>Shapiro Associates LLC</BusinessNameLine1Txt>
        </OrganizationBusinessName>
        <USAddress>
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          <CityNm>Northfield</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
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        <NetToOrganizationAmt>-24350</NetToOrganizationAmt>
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      <LicensedStatesCd>AL</LicensedStatesCd>
      <LicensedStatesCd>AK</LicensedStatesCd>
      <LicensedStatesCd>AR</LicensedStatesCd>
      <LicensedStatesCd>CA</LicensedStatesCd>
      <LicensedStatesCd>CO</LicensedStatesCd>
      <LicensedStatesCd>CT</LicensedStatesCd>
      <LicensedStatesCd>DC</LicensedStatesCd>
      <LicensedStatesCd>FL</LicensedStatesCd>
      <LicensedStatesCd>GA</LicensedStatesCd>
      <LicensedStatesCd>HI</LicensedStatesCd>
      <LicensedStatesCd>IL</LicensedStatesCd>
      <LicensedStatesCd>KS</LicensedStatesCd>
      <LicensedStatesCd>KY</LicensedStatesCd>
      <LicensedStatesCd>ME</LicensedStatesCd>
      <LicensedStatesCd>MD</LicensedStatesCd>
      <LicensedStatesCd>MA</LicensedStatesCd>
      <LicensedStatesCd>MI</LicensedStatesCd>
      <LicensedStatesCd>MN</LicensedStatesCd>
      <LicensedStatesCd>MS</LicensedStatesCd>
      <LicensedStatesCd>NV</LicensedStatesCd>
      <LicensedStatesCd>NH</LicensedStatesCd>
      <LicensedStatesCd>NJ</LicensedStatesCd>
      <LicensedStatesCd>NM</LicensedStatesCd>
      <LicensedStatesCd>NY</LicensedStatesCd>
      <LicensedStatesCd>NC</LicensedStatesCd>
      <LicensedStatesCd>ND</LicensedStatesCd>
      <LicensedStatesCd>OH</LicensedStatesCd>
      <LicensedStatesCd>OK</LicensedStatesCd>
      <LicensedStatesCd>OR</LicensedStatesCd>
      <LicensedStatesCd>PA</LicensedStatesCd>
      <LicensedStatesCd>RI</LicensedStatesCd>
      <LicensedStatesCd>SC</LicensedStatesCd>
      <LicensedStatesCd>TN</LicensedStatesCd>
      <LicensedStatesCd>UT</LicensedStatesCd>
      <LicensedStatesCd>VA</LicensedStatesCd>
      <LicensedStatesCd>WA</LicensedStatesCd>
      <LicensedStatesCd>WV</LicensedStatesCd>
      <LicensedStatesCd>WI</LicensedStatesCd>
      <FundraisingEventInformationGrp>
        <Event1Nm>Herman Kahn Award Dinner</Event1Nm>
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        <GrossRevenueEvent1Amt>52200</GrossRevenueEvent1Amt>
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        <CharitableContributionsTotAmt>2097842</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>52200</GrossRevenueTotalEventsAmt>
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        <NetIncomeSummaryAmt>-263726</NetIncomeSummaryAmt>
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      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
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      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
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        <NontaxableBenefitsFilingOrgAmt>20425</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>287255</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Ann Marie Hauser</PersonNm>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Bryan Clark</PersonNm>
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        <ExplanationTxt>A draft version of Hudson Institute's Form 990 is reviewed by its senior management team, including the President and CEO and the Executive Vice President, and the Audit and Risk Committee of the Board of Trustees. A complete final draft of the Form 990 is provided to the Board of Trustees for final comments before filing with the Internal Revenue Service.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>Hudson Institute's audited financial statements and Form 990 are available to the public on its website. Hudson's governing documents and conflict of interest policy are available to the public upon request.</ExplanationTxt>
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