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      <TermEndowmentBalanceEOYPct>0.09320</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>false</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>false</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>253345</OtherCostOrOtherBasisAmt>
        <BookValueAmt>253345</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>90575514</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>32733900</DepreciationAmt>
        <BookValueAmt>57841614</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp />
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>11742398</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>11541142</DepreciationAmt>
        <BookValueAmt>299439</BookValueAmt>
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      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>6560983</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>6092886</DepreciationAmt>
        <BookValueAmt>369914</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>58764312</TotalBookValueLandBuildingsAmt>
      <FinancialDerivativesGrp />
      <CloselyHeldEquityInterestsGrp />
      <OtherSecuritiesGrp>
        <Desc>PIMCO SHORT TERM INSTL.</Desc>
        <BookValueAmt>21434496</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>SCHWAB S&amp;P 500 INDEX FD.</Desc>
        <BookValueAmt>10191519</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>ALTERNATIVE INVESTMENTS</Desc>
        <BookValueAmt>1806694</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>33432709</TotalBookValueSecuritiesAmt>
      <FederalIncomeTaxLiabilityAmt>0</FederalIncomeTaxLiabilityAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>NONQUALIFIED DEFERRED COMP</Desc>
        <Amt>513151</Amt>
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      <TotalLiabilityAmt>513151</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>40576202</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-158785</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>1542</DonatedServicesAndUseFcltsAmt>
      <OtherRevenueAmt>-38270</OtherRevenueAmt>
      <RevenueNotReportedAmt>-195513</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>40771715</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>195291</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>4921811</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>5117102</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>45888817</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>38967298</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesSubtotalAmt>38967298</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>195291</InvestmentExpensesNotIncld2Amt>
      <OtherExpensesNotIncludedAmt>4921811</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>5117102</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>44084400</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>COLLECTIONS OF ART</FormAndLineReferenceDesc>
        <ExplanationTxt>PART III, LINE 4 OVER A PERIOD OF TIME THE SCHOOL HAS RECEIVED CONTRIBUTIONS OF WORKS OF ART AND FURNISHINGS TO BE EXHIBITED IN VARIOUS LOCATIONS ON THE CAMPUS. THESE ITEMS HAVE BEEN CAPITALIZED AS COLLECTIONS. THE COLLECTION NOT ONLY ENHANCES THE AESTHETIC ENVIRONMENT OF THE SCHOOL, IT SUPPORTS THE CURRICULUM OF THE SCHOOL BY MAKING ART AVAILABLE TO STUDENTS. THE COLLECTIONS ARE RECORDED AT APPRAISED VALUE WHEN DONATED. THE SCHOOL UNDERTAKES TO CARE FOR, PROTECT, AND PRESERVE SUCH CONTRIBUTED WORKS OF ART AND FURNISHINGS. COLLECTION ITEMS ARE INSPECTED PERIODICALLY AND REPAIRED AS REQUIRED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>INTENDED USES OF ENDOWMENT FUNDS</FormAndLineReferenceDesc>
        <ExplanationTxt>PART V, LINE 4 SOME ENDOWMENT FUNDS ARE DESIGNATED BY THE DONOR OR THE BOARD TO SUPPORT FINANCIAL AID, FACULTY, TECHNOLOGY, AND OTHER SPECIFIC PROGRAMS. GENERAL ENDOWMENT FUNDS ARE USED TO SUPPORT GENERAL OPERATIONS OF THE SCHOOL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FIN 48 (ASC 740) FOOTNOTE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART X, LINE 2 THE SCHOOL IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(A) OF THE INTERNAL REVENUE CODE (IRC) OF 1986, AS AMENDED, AS AN ORGANIZATION DESCRIBED IN SECTION 501(C)(3) OF THE IRC AS EVIDENCED BY ITS DETERMINATION LETTER DATED MARCH 1953. THE SCHOOL HAS BEEN CLASSIFIED AS AN ORGANIZATION THAT IS NOT A PRIVATE FOUNDATION UNDER IRC SECTION 509(A)(1) AND, AS SUCH, CONTRIBUTIONS TO THE SCHOOL QUALIFY FOR DEDUCTION AS CHARITABLE CONTRIBUTIONS PURSUANT TO IRC SECTION 170(A)(1). HOWEVER, INCOME GENERATED FROM ACTIVITIES UNRELATED TO THE SCHOOLS EXEMPT PURPOSE IS SUBJECT TO TAX UNDER IRC SECTION 511. THE SCHOOL DID NOT HAVE ANY MATERIAL UNRELATED BUSINESS INCOME OR RELATED TAX LIABILITY FOR THE YEARS ENDED JUNE 30, 2017 AND 2016. THE SCHOOL HAS CONCLUDED THAT IT DOES NOT HAVE ANY UNRECOGNIZED TAX BENEFITS RESULTING FROM CURRENT OR PRIOR PERIOD TAX POSITIONS. ACCORDINGLY, NO ADDITIONAL DISCLOSURES HAVE BEEN MADE ON THE FINANCIAL STATEMENTS REGARDING UNCERTAIN TAX POSITIONS. THE SCHOOL DOES NOT HAVE ANY OUTSTANDING INTEREST OR PENALTIES, AND NONE HAVE BEEN RECORDED IN THE STATEMENT OF ACTIVITIES FOR THE YEARS ENDED JUNE 30, 2017 AND 2016.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>RECONCILIATION OF REVENUE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART XI, LINE 2D UNCOLLECTIBLE WRITE-OFFS $ (38,270)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>TUITION REPORTED NET ON FINANCIALS $5,328,524 COST OF GOODS SOLD $ (279,480) RENTAL EXPENSE $ (127,233) ------------ $4,921,811 ============</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>RECONCILIATION OF EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>PART XII, LINE 4B TUITION REPORTED NET ON FINANCIALS $5,328,524 COST OF GOODS SOLD $ (279,480) RENTAL EXPENSE $ (127,233) ------------ $4,921,811 ============</ExplanationTxt>
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      <PlcyPblczdViaBroadcastMediaInd>true</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>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE E, PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MEDIA ADVERTISEMENTS INCLUDE A STATEMENT REGARDING THE SCHOOL'S NONDISCRIMINATORY POLICY. AT A MINIMUM, A YEARLY ADVERTISEMENT IS MADE IN THE DALLAS MORNING NEWS.</ExplanationTxt>
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        <RegionTxt>Central America and the Caribbean</RegionTxt>
        <TypeOfActivitiesConductedTxt>Investments</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>60749</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalSpentAmt>60749</SubtotalSpentAmt>
      <TotalSpentAmt>60749</TotalSpentAmt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
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        <CharitableContriEvent1Amt>81767</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>255879</GrossRevenueEvent1Amt>
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        <FoodAndBeverageEvent1Amt>49174</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>68847</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>49175</OtherDirectExpensesEvent1Amt>
        <OtherEventsTotalCnt>0</OtherEventsTotalCnt>
        <GrossReceiptsTotalAmt>337646</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>81767</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>255879</GrossRevenueTotalEventsAmt>
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        <FoodAndBeverageTotalEventsAmt>49174</FoodAndBeverageTotalEventsAmt>
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        <OthDirectExpnssTotalEventsAmt>49175</OthDirectExpnssTotalEventsAmt>
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        <NetIncomeSummaryAmt>61433</NetIncomeSummaryAmt>
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        <OthDirectExpnssOtherGamingAmt>630</OthDirectExpnssOtherGamingAmt>
        <VolunteerLaborOtherGamingInd>true</VolunteerLaborOtherGamingInd>
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        <OthDirectExpnssTotalGamingAmt>630</OthDirectExpnssTotalGamingAmt>
        <DirectExpenseSummaryGamingAmt>11270</DirectExpenseSummaryGamingAmt>
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      <StatesWhereGamingConductedCd>TX</StatesWhereGamingConductedCd>
      <LicensedInd>false</LicensedInd>
      <ExplanationIfNoTxt>THE ONLY GAMING ACTIVITIES OF GREENHILL SCHOOL ARE RAFFLES GOVERNED BY THE TEXAS CHARITABLE ENABLING ACT. THE SCHOOL ADHERES TO THIS ACT.</ExplanationIfNoTxt>
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      <MemberOfOtherEntityInd>false</MemberOfOtherEntityInd>
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      <IndividualWithBooksNm>Laura Forson</IndividualWithBooksNm>
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        <AddressLine1Txt>4141 Spring Valley Road</AddressLine1Txt>
        <CityNm>Addison</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>75001</ZIPCd>
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      <CntrctWith3rdPrtyForGameRevInd>false</CntrctWith3rdPrtyForGameRevInd>
      <GamingManagerPersonNm>THERESA JONES</GamingManagerPersonNm>
      <GamingManagerServicesProvTxt>SUPERVISION OF RAFFLE TICKET SALES/PRIZE AWARDING</GamingManagerServicesProvTxt>
      <GamingManagerIsEmployeeInd>X</GamingManagerIsEmployeeInd>
      <CharitableDistributionRqrInd>false</CharitableDistributionRqrInd>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Financial aid</GrantTypeTxt>
        <RecipientCnt>206</RecipientCnt>
        <NonCashAssistanceAmt>4146536</NonCashAssistanceAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>TUITION</NonCashAssistanceDesc>
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        <FormAndLineReferenceDesc>GRANT MONITORING</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 2 ALL GRANTS ARE PROVIDED AS A DISCOUNT TO THE TUITION THAT IS BILLED TO EACH FAMILY. CASH IS NOT PROVIDED TO THE GRANTEE.</ExplanationTxt>
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      <SubstantiationRequiredInd>true</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
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      <CompensationSurveyInd>X</CompensationSurveyInd>
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      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>true</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
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        <PersonNm>Scott Griggs</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>232543</BonusFilingOrganizationAmount>
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        <PersonNm>Melissa Orth</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Julie Diaz</PersonNm>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>287216</TotalCompensationFilingOrgAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Michael Simpson</PersonNm>
        <TitleTxt>Head of Lower School</TitleTxt>
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        <DeferredCompensationFlngOrgAmt>7525</DeferredCompensationFlngOrgAmt>
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        <TotalCompensationFilingOrgAmt>294464</TotalCompensationFilingOrgAmt>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Laura Ross</PersonNm>
        <TitleTxt>Head of Upper School</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>238</BonusFilingOrganizationAmount>
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        <DeferredCompensationFlngOrgAmt>7788</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>49052</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>222287</TotalCompensationFilingOrgAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Susan Palmer</PersonNm>
        <TitleTxt>Head of Middle School</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>10343</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>9181</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>169980</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Chad Wabrek</PersonNm>
        <TitleTxt>Head of Athletics</TitleTxt>
        <BaseCompensationFilingOrgAmt>136188</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>238</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>7013</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>6925</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>30154</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>180518</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>HOUSING ALLOWANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 1A THE HEAD OF SCHOOL RECEIVES A HOUSING ALLOWANCE; AMOUNTS ARE REPORTED AS TAXABLE COMPENSATION. THE HOUSING ALLOWANCE FOR CALENDAR 2016 WAS $53,502.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>NONQUALIFIED RETIREMENT PLAN</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I, LINE 4B CONTRIBUTIONS OF $100,000 WERE MADE TO A 457(F) PLAN FOR THE HEAD OF SCHOOL. INDIVIDUALS BECAME VESTED IN THE BALANCE OF PLAN AS OF 6/30/14 AND THE BALANCE IS PAID OUT OVER THE FOLLOWING THREE FISCAL YEARS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="IRS990ScheduleL">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>Nathaniel Reid-Griggs</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Family member of officer</RelationshipDescriptionTxt>
        <TransactionAmt>47919</TransactionAmt>
        <TransactionDesc>Compensation to employee</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>4372</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>19098</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </ClothingAndHouseholdGoodsGrp>
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>13</ContributionCnt>
        <NoncashContributionsRptF990Amt>66977</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>200</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </CollectiblesGrp>
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Meals and entertainment</Desc>
        <ContributionCnt>79</ContributionCnt>
        <NoncashContributionsRptF990Amt>53302</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Travel</Desc>
        <ContributionCnt>4</ContributionCnt>
        <NoncashContributionsRptF990Amt>11400</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Trips</Desc>
        <ContributionCnt>3</ContributionCnt>
        <NoncashContributionsRptF990Amt>15000</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>EXECUTIVE COMMITTEE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION A, LINE 1A PER ARTICLE V, SECTION 5.1 OF THE ORGANIZATION'S BYLAWS, THE EXECUTIVE COMMITTEE SHALL BE COMPRISED OF UP TO FOURTEEN TRUSTEES, INCLUDING THE CHAIR, THE CHAIR-ELECT, THE SECRETARY/ASSISTANT CHAIR, THE TREASURER, THE CHAIRPERSONS OF ALL COMMITTEES, AND AT-LARGE MEMBERS NOMINATED BY THE CHAIR AT HIS OR HER DISCRETION. THE EXECUTIVE COMMITTEE SHALL HAVE AND EXERCISE ALL POWER AND AUTHORITY VESTED IN THE BOARD IN THE MANAGEMENT OF THE BUSINESS, PROPERTY, AND AFFAIRS OF THE ORGANIZATION (INCLUDING, WITHOUT LIMITATION, THE ADOPTION OF ADVISORY POLICIES WITH RESPECT TO THE MANAGEMENT AND OPERATIONS OF THE ORGANIZATION), EXCEPT IN RESPECT OF REMOVAL OR ELECTION OF TRUSTEES AND OFFICERS OF THE CORPORATION AND AMENDMENT OF THE BYLAWS, AND SHALL HAVE SUCH OTHER POWER AND AUTHORITY AS SHALL BE EXPRESSLY DELEGATED TO IT BY THE BOARD BY THE AFFIRMATIVE VOTE OF A MAJORITY OF THE TRUSTEES THEN IN OFFICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>RELATIONSHIPS</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION A, LINE 2 THOMAS M. DUNNING AND HOLLAND P. GARY - BUSINESS RELATIONSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 REVIEW</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION B, LINE 11B THE DRAFT FORMS 990 AND 990-T ARE REVIEWED AND APPROVED BY THE AUDIT AND RISK MANAGEMENT COMMITTEE PRIOR TO FILING. THE FORMS 990 AND 990-T ARE ALSO MADE AVAILABLE TO THE ENTIRE BOARD VIA SECURE EMAIL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CONFLICT OF INTEREST POLICY</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION B, LINE 12C THE POLICY IS DISTRIBUTED AT THE BEGINNING OF EACH YEAR TO ALL BOARD MEMBERS, AS WELL AS ALL EMPLOYEES WITH PURCHASING RESPONSIBILITY. THE POLICY IS INCLUDED IN THE BOARD OF TRUSTEES MANUAL AND THE EMPLOYEE POLICIES AND PROCEDURES MANUAL. THE POLICY REQUIRES THE DISCLOSURE OF ANY COMPENSATION RECEIVED FROM THE ORGANIZATION AND ANY RELATIONSHIPS WITH RELATED PARTIES (REPORTED IN FORM 990, PART VI AND SCHEDULE O). AT EACH COMMITTEE AND BOARD MEETING, MEMBERS ARE EXPECTED TO COMPLY WITH THE POLICY. ANY BOARD MEMBERS WITH A POTENTIAL CONFLICT OF INTEREST ARE EXPECTED TO RECUSE THEMSELVES FROM ANY RELEVANT ISSUE AND THE RECUSAL IS REFLECTED IN THE MINUTES OF THAT MEETING. IF THAT MATTER INVOLVES AN ADMINISTRATOR, FACULTY MEMBER OR OTHER EMPLOYEE, HE OR SHE SHOULD ADVISE THE HEAD OF SCHOOL. IF THE MATTER INVOLVES THE CHAIR OF THE BOARD, HE OR SHE SHOULD ADVISE THE CHAIR OF THE AUDIT AND RISK MANAGEMENT COMMITTEE. THE CHAIR OF THE BOARD, THE HEAD OF SCHOOL, OR THE CHAIR OF THE AUDIT AND RISK MANAGEMENT COMMITTEE, AS THE CASE MAY BE, SHOULD THEN CONSULT WITH SUCH PERSONS, PROVIDE SUCH GUIDANCE AND TAKE SUCH ACTION AS HE, SHE, OR IT CONSIDERS APPROPRIATE TO ADDRESS THE MATTER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>COMPENSATION DETERMINATION</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION B, LINES 15A AND 15B THE HEAD OF SCHOOL'S COMPENSATION IS OUTLINED IN HIS 5-YEAR CONTRACT. WHEN THE CONTRACT IS UP FOR RENEWAL, THE COMPENSATION COMMITTEE BENCHMARKS THE COMPENSATION AGAINST OTHER SCHOOLS AND OUTLINES EACH YEAR'S COMPENSATION IN THE CONTRACT. THE CFO/COO'S COMPENSATION IS BASED UPON EXPERIENCE UPON HIRE AND RECEIVES THE MERIT INCREASE FOR ADMINISTRATORS AS ESTABLISHED ANNUALLY BY THE BOARD. BOTH THE HEAD OF SCHOOL AND CFO/COO'S COMPENSATIONS ARE ADDITIONALLY REVIEWED EACH YEAR BY THE AUDIT COMMITTEE IN COMPLIANCE WITH INTERMEDIATE SANCTION REGULATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>GOVERNING DOCUMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION C, LINE 19 THE ORGANIZATION'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE GREENHILL COMMUNITY (EMPLOYEES, VOLUNTEER LEADERSHIP, TRUSTEES) BUT NOT TO THE GENERAL PUBLIC OUTSIDE THE SCHOOL COMMUNITY. SUMMARIZED FINANCIAL INFORMATION IS INCLUDED IN THE ANNUAL REPORT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>OTHER CHANGES IN NET ASSETS AND FUND BALANCES</FormAndLineReferenceDesc>
        <ExplanationTxt>PART XI, LINE 9 UNCOLLECTIBLE WRITE-OFFS $(38,270)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>AUDIT AND RISK MANAGEMENT COMMITTEE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART XII, LINE 2C GREENHILL SCHOOL HAS AN AUDIT AND RISK MANAGEMENT COMMITTEE THAT ASSUMES RESPONSIBILITY FOR OVERSIGHT OF THE ANNUAL FINANCIAL STATEMENT AUDIT AND THE RESULTING FINANCIAL STATEMENTS. THE AUDIT AND RISK MANAGEMENT COMMITTEE IS ALSO RESPONSIBLE FOR ASSESSING AND SELECTING THE EXTERNAL AUDIT FIRM OF GREENHILL SCHOOL. GREENHILL SCHOOL DID NOT CHANGE ITS OVERSIGHT OR SELECTION PROCESS FOR THE APPOINTMENT OF THE EXTERNAL AUDIT FIRM DURING THE TAX YEAR CURRENTLY REPORTED ON.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>