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        <EOYAmt>1592017</EOYAmt>
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        <EOYAmt>22726574</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>22768409</EOYAmt>
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      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContriRcvd170Grp>
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        <CurrentTaxYearMinus3YearsAmt>880385</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3814829</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>13243636</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3208854</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>13243636</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3208854</CurrentTaxYearAmt>
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      <GrossInvestmentIncome170Grp>
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        <CurrentTaxYearMinus3YearsAmt>132</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5898</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>145624</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>257216</CurrentTaxYearAmt>
        <TotalAmt>410077</TotalAmt>
      </GrossInvestmentIncome170Grp>
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      <GrossReceiptsRltdActivitiesAmt>260344</GrossReceiptsRltdActivitiesAmt>
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      <PublicSupportPY170Pct>0.23560</PublicSupportPY170Pct>
      <TenPctFactsCrcmstncsTestCYInd>X</TenPctFactsCrcmstncsTestCYInd>
      <FactsAndCircumstancesTestTxt>Friends of IHES (FIHES) works to promote an appreciation for and understanding of French science and culture in the United States of America. In particular, it aims to further the advancement of research and to nurture exchanges in mathematics, physics, and theoretical sciences at the Institut des Hautes Etudes Scientifiques (IHES), located in Bures-sur-Yvette, France.FIHES is organized and operated to attract new and additional public support on a continuous basis. While certain large corporate and foundation donations may continue in the near term, this support is crucial to the support of the program service activities that accomplish the overall exempt purpose of the organization. FIHES will continue to solicit qualifying public support to assist in carrying out the program activities.As illustrated in in the program activities in Part III of the Form 990, the program services directly benefit the general public on a continuing basis. Finally, the governing body represents the broad interest of the public, with no one individual or group of individuals having undue control or influence over the organization's funding or affairs. Each board member brings important skill sets, specialized knowledge, qualifications and expertise that help the organization plan and achieve its strategic objectives. FIHES qualifies as a publicly supported organization under the facts and circumstances test set forth in Treas. Reg. 1.170A-9(f)(3). The public support exceeded the 10 percent threshold for public charities. Furthermore, the ongoing fundraising efforts, sources of support, governing body and charitable programs it conducts all demonstrate sufficient public support to meet the facts and circumstances test. Based upon all of the above, the "facts and circumstances" substantiate that FIHES continues to operate as a public charity.</FactsAndCircumstancesTestTxt>
    </IRS990ScheduleA>
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      <ContributorInformationGrp>
        <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>
    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <BeginningYearBalanceAmt>11877496</BeginningYearBalanceAmt>
        <ContributionsAmt>4358397</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>927445</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>17163338</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>712068</BeginningYearBalanceAmt>
        <ContributionsAmt>10674298</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>491130</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>11877496</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>605625</BeginningYearBalanceAmt>
        <ContributionsAmt>100600</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>5843</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>712068</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>402717</BeginningYearBalanceAmt>
        <ContributionsAmt>255057</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>-15749</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>36400</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>605625</EndYearBalanceAmt>
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        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>402717</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
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      <PrmnntEndowmentBalanceEOYPct>0.00000</PrmnntEndowmentBalanceEOYPct>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>Alternative Investments- NAV</Desc>
        <BookValueAmt>8276908</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>8276908</TotalBookValueSecuritiesAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>2147740</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>2147740</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>2827832</RevenueSubtotalAmt>
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      <RevenueNotReportedFinclStmtAmt>649665</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>3477497</TotalRevenuePerForm990Amt>
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      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>358655</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>649665</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>649665</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1008320</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The proceeds generated by the endowment funds will be used to fund an associated professorship and a lecture series at IHES, and for women researchers at IHES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Management evaluated the Organization's tax positions and has concluded that the Organization has taken no uncertain tax positions that require either recognition or disclosure in the accompanying financial statements.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe - France</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grants to recipients located in the region</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>205000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Central America and the Caribbean - Cayman Islands</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Investments</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>8276908</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>8481908</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>8481908</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe</RegionTxt>
        <PurposeOfGrantTxt>General and program support</PurposeOfGrantTxt>
        <CashGrantAmt>205000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>Wire</MannerOfCashDisbursementTxt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>1</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization is a Friends of organization. Grant recipients send the Chair of FIHES a yearly narrative report detailing the use of funds.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>Foreign expenses are directly tracked and accounted for on the accrual method of accounting.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I, Line 1, Description of Organization Mission:</FormAndLineReferenceDesc>
        <ExplanationTxt>Friends of IHES, Inc. is a tax-exempt charity organized in the United States. It was created in 1999 with the primary goals to increase the visibility of IHES (Institut des Hautes Etudes Scientifiques) in the United States, to coordinate the network of current and former American visiting scholars to the Institute, and to raise funds for IHES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of the Form 990 is made available to the Board for review prior to filing with the IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Directors are required to complete conflict of interest disclosure statements annually.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization makes its governing documents and financial statements available to the public upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Audit Committee assumes responsibility for oversight of the audit of the financial statements and selection of an independent accountant. The process is consistent with previous years.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>