﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2018v3.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2019-05-03T11:16:05-07:00</ReturnTs>
    <TaxPeriodEndDt>2018-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>760269860</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Blazek &amp; Vetterling</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>2900 Weslayan Suite 200</AddressLine1Txt>
        <CityNm>Houston</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>770275132</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2018-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>202028290</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Endowment for Regional Sustainability</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>Science</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>ENDO</BusinessNameControlTxt>
      <PhoneNum>7133775085</PhoneNum>
      <USAddress>
        <AddressLine1Txt>2700 Technology Forest Blvd</AddressLine1Txt>
        <CityNm>The Woodlands</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77381</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Keith Bickham</PersonNm>
      <PersonTitleTxt>Secretary</PersonTitleTxt>
      <SignatureDt>2019-05-03</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Jody Blazek</PreparerPersonNm>
      <PTIN>P00072674</PTIN>
      <PhoneNum>7134395739</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2018</TaxYr>
    <BuildTS>2020-01-14 16:20:31Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="6">
    <IRS990PF documentId="IRS990PF" referenceDocumentId="GeneralExplanation" softwareId="18007218" softwareVersionNum="2018v3.1">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>27756534</FMVAssetsEOYAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AnalysisOfRevenueAndExpenses>
        <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
        <InterestOnSavRevAndExpnssAmt>26489</InterestOnSavRevAndExpnssAmt>
        <InterestOnSavNetInvstIncmAmt>26489</InterestOnSavNetInvstIncmAmt>
        <DividendsRevAndExpnssAmt>405518</DividendsRevAndExpnssAmt>
        <DividendsNetInvstIncmAmt>405518</DividendsNetInvstIncmAmt>
        <NetGainSaleAstRevAndExpnssAmt>427114</NetGainSaleAstRevAndExpnssAmt>
        <GrossSalesPriceAmt>10293735</GrossSalesPriceAmt>
        <CapGainNetIncmNetInvstIncmAmt>427114</CapGainNetIncmNetInvstIncmAmt>
        <TotalRevAndExpnssAmt>859121</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>859121</TotalNetInvstIncmAmt>
        <AccountingFeesRevAndExpnssAmt referenceDocumentId="AccountingFeesSchedule">2809</AccountingFeesRevAndExpnssAmt>
        <AccountingFeesNetInvstIncmAmt>1405</AccountingFeesNetInvstIncmAmt>
        <AccountingFeesChrtblPrpsAmt>1404</AccountingFeesChrtblPrpsAmt>
        <OtherProfFeesRevAndExpnssAmt referenceDocumentId="OtherProfessionalFeesSchedule">12000</OtherProfFeesRevAndExpnssAmt>
        <OtherProfFeesNetInvstIncmAmt>7200</OtherProfFeesNetInvstIncmAmt>
        <OtherProfFeesDsbrsChrtblAmt>6000</OtherProfFeesDsbrsChrtblAmt>
        <TaxesRevAndExpnssAmt referenceDocumentId="TaxesSchedule">10220</TaxesRevAndExpnssAmt>
        <TaxesNetInvstIncmAmt>1740</TaxesNetInvstIncmAmt>
        <OtherExpensesRevAndExpnssAmt referenceDocumentId="OtherExpensesSchedule AmortizationSchedule">4425</OtherExpensesRevAndExpnssAmt>
        <OtherExpensesNetInvstIncmAmt>800</OtherExpensesNetInvstIncmAmt>
        <OtherExpensesDsbrsChrtblAmt>3625</OtherExpensesDsbrsChrtblAmt>
        <TotOprExpensesRevAndExpnssAmt>29454</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>11145</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>11029</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>2550000</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>2550000</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>2579454</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>11145</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>2561029</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>-1720333</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>847976</NetInvestmentIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <SavAndTempCashInvstBOYAmt>1591570</SavAndTempCashInvstBOYAmt>
        <SavAndTempCashInvstEOYAmt>1530135</SavAndTempCashInvstEOYAmt>
        <SavAndTempCashInvstEOYFMVAmt>1530135</SavAndTempCashInvstEOYFMVAmt>
        <PrepaidExpensesBOYAmt>28865</PrepaidExpensesBOYAmt>
        <PrepaidExpensesEOYAmt>20385</PrepaidExpensesEOYAmt>
        <PrepaidExpensesEOYFMVAmt>20385</PrepaidExpensesEOYFMVAmt>
        <CorporateStockBOYAmt>23292170</CorporateStockBOYAmt>
        <CorporateStockEOYAmt referenceDocumentId="InvestmentsCorpStockSchedule">21638752</CorporateStockEOYAmt>
        <CorporateStockEOYFMVAmt>26206014</CorporateStockEOYFMVAmt>
        <TotalAssetsBOYAmt>24912605</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>23189272</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>27756534</TotalAssetsEOYFMVAmt>
        <AccountsPayableBOYAmt>3000</AccountsPayableBOYAmt>
        <TotalLiabilitiesBOYAmt>3000</TotalLiabilitiesBOYAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowSFAS117Ind>X</OrgDoesNotFollowSFAS117Ind>
        <CapitalStockBOYAmt>24909605</CapitalStockBOYAmt>
        <CapitalStockEOYAmt>23189272</CapitalStockEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>24909605</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>23189272</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>24912605</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>23189272</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>24909605</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>-1720333</ExcessRevenueOverExpensesAmt>
        <SubtotalAmt>23189272</SubtotalAmt>
        <TotNetAstOrFundBalancesEOYAmt>23189272</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>Publicly traded securities</PropertyDesc>
          <GrossSalesPriceAmt>10293735</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>9866621</CostOrOtherBasisAmt>
          <GainOrLossAmt>427114</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>427114</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapitalGainNetIncomeAmt>427114</CapitalGainNetIncomeAmt>
      </CapGainsLossTxInvstIncmDetail>
      <QlfyUndSect4940eReducedTaxGrp>
        <LiableSection4942TaxInd>false</LiableSection4942TaxInd>
        <AdjustedQlfyDistriYr1Amt>3235453</AdjustedQlfyDistriYr1Amt>
        <NetVlNoncharitableAssetsYr1Amt>31744712</NetVlNoncharitableAssetsYr1Amt>
        <DistributionYr1Rt>0.10192</DistributionYr1Rt>
        <AdjustedQlfyDistriYr2Amt>3362927</AdjustedQlfyDistriYr2Amt>
        <NetVlNoncharitableAssetsYr2Amt>35383251</NetVlNoncharitableAssetsYr2Amt>
        <DistributionYr2Rt>0.09504</DistributionYr2Rt>
        <AdjustedQlfyDistriYr3Amt>1980350</AdjustedQlfyDistriYr3Amt>
        <NetVlNoncharitableAssetsYr3Amt>31393435</NetVlNoncharitableAssetsYr3Amt>
        <DistributionYr3Rt>0.06308</DistributionYr3Rt>
        <AdjustedQlfyDistriYr4Amt>2114847</AdjustedQlfyDistriYr4Amt>
        <NetVlNoncharitableAssetsYr4Amt>33549842</NetVlNoncharitableAssetsYr4Amt>
        <DistributionYr4Rt>0.06304</DistributionYr4Rt>
        <AdjustedQlfyDistriYr5Amt>1505747</AdjustedQlfyDistriYr5Amt>
        <NetVlNoncharitableAssetsYr5Amt>36295413</NetVlNoncharitableAssetsYr5Amt>
        <DistributionYr5Rt>0.04149</DistributionYr5Rt>
        <TotalDistributionRt>0.364568</TotalDistributionRt>
        <AverageDistributionRt>0.072914</AverageDistributionRt>
        <NetVlNoncharitableAssetsAmt>32046449</NetVlNoncharitableAssetsAmt>
        <AdjNetVlNoncharitableAssetsAmt>2336635</AdjNetVlNoncharitableAssetsAmt>
        <NetInvestmentIncomePctAmt>8480</NetInvestmentIncomePctAmt>
        <AdjNonchrtblNetInvstIncmPctAmt>2345115</AdjNonchrtblNetInvstIncmPctAmt>
        <QualifyingDistributionsAmt>2561029</QualifyingDistributionsAmt>
      </QlfyUndSect4940eReducedTaxGrp>
      <ExciseTaxBasedOnInvstIncmGrp>
        <DomesticOrgMeetingSect4940eInd>X</DomesticOrgMeetingSect4940eInd>
        <InvestmentIncomeExciseTaxAmt>8480</InvestmentIncomeExciseTaxAmt>
        <SubtotalAmt>8480</SubtotalAmt>
        <TaxBasedOnInvestmentIncomeAmt>8480</TaxBasedOnInvestmentIncomeAmt>
        <EstimatedPlusOvpmtIncmTxAmt>28901</EstimatedPlusOvpmtIncmTxAmt>
        <TotalPaymentsAndCreditsAmt>28901</TotalPaymentsAndCreditsAmt>
        <OverpaymentAmt>20421</OverpaymentAmt>
        <AppliedToESTaxAmt>20421</AppliedToESTaxAmt>
      </ExciseTaxBasedOnInvstIncmGrp>
      <StatementsRegardingActyGrp>
        <LegislativePoliticalActyInd>false</LegislativePoliticalActyInd>
        <MoreThan100SpentInd>false</MoreThan100SpentInd>
        <Form1120POLFiledInd>false</Form1120POLFiledInd>
        <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
        <ChangesToArticlesOrBylawsInd>false</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
        <Form990TFiledInd>false</Form990TFiledInd>
        <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
        <Section508eRqrSatisfiedInd>true</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>true</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>TX</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>false</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>false</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
        <PersonsWithBooksName>
          <BusinessNameLine1Txt>Keith Bickham</BusinessNameLine1Txt>
        </PersonsWithBooksName>
        <PhoneNum>7133775017</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1Txt>2700 Tech Forest Blvd 260</AddressLine1Txt>
          <CityNm>The Woodlands</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77381</ZIPCd>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>false</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>true</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>false</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
        <ActsFailToQlfyAsExceptionsInd>false</ActsFailToQlfyAsExceptionsInd>
        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <UndistrIncmSect4942a2NotAppInd>false</UndistrIncmSect4942a2NotAppInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <ExcessBusinessHoldingsInd>false</ExcessBusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
        <InfluenceElectionInd>false</InfluenceElectionInd>
        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>false</NoncharitablePurposeInd>
        <TransactionsFailToQlfyAsExcInd>false</TransactionsFailToQlfyAsExcInd>
        <MaintainedExpenditureRspnsInd>false</MaintainedExpenditureRspnsInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
        <ProceedsOrNetIncomeInd>false</ProceedsOrNetIncomeInd>
        <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>J Todd Mitchell</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>President</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Keith Bickham</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>Secretary</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Marilu Hastings</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>Director</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Katherine Lorenz</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>Director</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Dietrich Scheder-Bieschin</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>Director</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Jonathan Zonis</PersonNm>
          <USAddress>
            <AddressLine1Txt>2700 Technology Forest 260</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </USAddress>
          <TitleTxt>Director</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompOfHghstPdEmplOrNONETxt>NONE</CompOfHghstPdEmplOrNONETxt>
        <CompOfHghstPdCntrctOrNONETxt>NONE</CompOfHghstPdCntrctOrNONETxt>
      </OfficerDirTrstKeyEmplInfoGrp>
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>31071407</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>1463059</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>32534466</TotalFMVOfUnusedAssetsAmt>
        <ReductionClaimedAmt>0</ReductionClaimedAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>32534466</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>488017</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>32046449</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>1602322</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <MinimumInvestmentReturnAmt>1602322</MinimumInvestmentReturnAmt>
        <TaxBasedOnInvestmentIncomeAmt>8480</TaxBasedOnInvestmentIncomeAmt>
        <TotalTaxAmt>8480</TotalTaxAmt>
        <DistributableBeforeAdjAmt>1593842</DistributableBeforeAdjAmt>
        <DistributableBeforeDedAmt>1593842</DistributableBeforeDedAmt>
        <DistributableAsAdjustedAmt>1593842</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <QualifyingDistriPartXIIGrp>
        <ExpensesAndContributionsAmt>2561029</ExpensesAndContributionsAmt>
        <QualifyingDistributionsAmt>2561029</QualifyingDistributionsAmt>
        <PctSect4940eOrgNetInvstIncmAmt>8480</PctSect4940eOrgNetInvstIncmAmt>
        <AdjustedQualifyingDistriAmt>2552549</AdjustedQualifyingDistriAmt>
      </QualifyingDistriPartXIIGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>1593842</DistributableAsAdjustedAmt>
        <ExcessDistributionCyovYr4Amt>534877</ExcessDistributionCyovYr4Amt>
        <ExcessDistributionCyovYr3Amt>423906</ExcessDistributionCyovYr3Amt>
        <ExcessDistributionCyovYr2Amt>1603464</ExcessDistributionCyovYr2Amt>
        <ExcessDistributionCyovYr1Amt>1656789</ExcessDistributionCyovYr1Amt>
        <TotalExcessDistributionCyovAmt>4219036</TotalExcessDistributionCyovAmt>
        <QualifyingDistributionsAmt>2561029</QualifyingDistributionsAmt>
        <TreatedAsDistriFromCorpusAmt>0</TreatedAsDistriFromCorpusAmt>
        <AppliedToCurrentYearAmt>1593842</AppliedToCurrentYearAmt>
        <RemainingDistriFromCorpusAmt>967187</RemainingDistriFromCorpusAmt>
        <TotalCorpusAmt>5186223</TotalCorpusAmt>
        <UndistributedIncomeCYAmt>0</UndistributedIncomeCYAmt>
        <ExcessDistriCyovToNextYrAmt>5186223</ExcessDistriCyovToNextYrAmt>
        <ExcessFromYear4Amt>534877</ExcessFromYear4Amt>
        <ExcessFromYear3Amt>423906</ExcessFromYear3Amt>
        <ExcessFromYear2Amt>1603464</ExcessFromYear2Amt>
        <ExcessFromYear1Amt>1656789</ExcessFromYear1Amt>
        <ExcessFromCurrentYearAmt>967187</ExcessFromCurrentYearAmt>
      </UndistributedIncomeGrp>
      <SupplementaryInformationGrp>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientPersonNm>Houston Advanced Research Center</RecipientPersonNm>
          <RecipientUSAddress>
            <AddressLine1Txt>4800 Research Forest Dr</AddressLine1Txt>
            <CityNm>The Woodlands</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>77381</ZIPCd>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>N/A</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>General support</GrantOrContributionPurposeTxt>
          <Amt>2550000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>2550000</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <IntOnSavAndTempCashInvstGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>26489</ExclusionAmt>
        </IntOnSavAndTempCashInvstGrp>
        <DivAndIntFromSecPartVIIGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>405518</ExclusionAmt>
        </DivAndIntFromSecPartVIIGrp>
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>427114</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>859121</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>859121</TotalIncomeProducingActyAmt>
      </AnalysisIncomeProducingActyGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>false</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>false</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>false</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>false</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>false</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <AccountingFeesSchedule documentId="AccountingFeesSchedule" softwareId="18007218" softwareVersionNum="2018v3.1">
      <AccountingFeesDetail>
        <CategoryTxt>Tax compliance</CategoryTxt>
        <Amt>2809</Amt>
        <NetInvestmentIncomeAmt>1405</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>1404</DisbursementsCharitablePrpsAmt>
      </AccountingFeesDetail>
    </AccountingFeesSchedule>
    <InvestmentsCorpStockSchedule documentId="InvestmentsCorpStockSchedule" softwareId="18007218" softwareVersionNum="2018v3.1">
      <InvestmentsCorporateStockGrp>
        <StockNm>14,000 shs Activision Blizzard Inc</StockNm>
        <EOYBookValueAmt>642024</EOYBookValueAmt>
        <EOYFMVAmt>651980</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>7,126 shs Adobe Inc</StockNm>
        <EOYBookValueAmt>629191</EOYBookValueAmt>
        <EOYFMVAmt>1612186</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>10,250 shs Alibaba Group Holding Ltd</StockNm>
        <EOYBookValueAmt>1085373</EOYBookValueAmt>
        <EOYFMVAmt>1404968</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,000 shs Ametek Inc</StockNm>
        <EOYBookValueAmt>241360</EOYBookValueAmt>
        <EOYFMVAmt>270800</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>845 shs Anthem Inc</StockNm>
        <EOYBookValueAmt>183206</EOYBookValueAmt>
        <EOYFMVAmt>221922</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,974 shs Aon PLC Cl A</StockNm>
        <EOYBookValueAmt>769978</EOYBookValueAmt>
        <EOYFMVAmt>868381</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>10,500 shs Apple Inc</StockNm>
        <EOYBookValueAmt>1323865</EOYBookValueAmt>
        <EOYFMVAmt>1656270</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,500 shs Autohome Inc Cl A</StockNm>
        <EOYBookValueAmt>280312</EOYBookValueAmt>
        <EOYFMVAmt>352035</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>2,250 shs Automatic Data Processing Inc</StockNm>
        <EOYBookValueAmt>309600</EOYBookValueAmt>
        <EOYFMVAmt>295020</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,482 shs Baidu Inc Cl A</StockNm>
        <EOYBookValueAmt>1161348</EOYBookValueAmt>
        <EOYFMVAmt>869445</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,000 shs Baozun Inc Spon ADR</StockNm>
        <EOYBookValueAmt>303350</EOYBookValueAmt>
        <EOYFMVAmt>146050</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,000 shs Copart Inc</StockNm>
        <EOYBookValueAmt>355019</EOYBookValueAmt>
        <EOYFMVAmt>286680</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>10,000 shs Corning Inc</StockNm>
        <EOYBookValueAmt>282100</EOYBookValueAmt>
        <EOYFMVAmt>302100</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>3,513 shs Electronic Arts Inc</StockNm>
        <EOYBookValueAmt>511843</EOYBookValueAmt>
        <EOYFMVAmt>277211</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,000 shs Eli Lilly &amp; Co</StockNm>
        <EOYBookValueAmt>357360</EOYBookValueAmt>
        <EOYFMVAmt>462880</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>12,700 shs Facebook Inc Cl A</StockNm>
        <EOYBookValueAmt>1222198</EOYBookValueAmt>
        <EOYFMVAmt>1664843</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>10,000 shs Fiserv Inc</StockNm>
        <EOYBookValueAmt>446600</EOYBookValueAmt>
        <EOYFMVAmt>734900</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,356 shs FMC Corp</StockNm>
        <EOYBookValueAmt>476148</EOYBookValueAmt>
        <EOYFMVAmt>396130</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,500 shs Hasbro Inc</StockNm>
        <EOYBookValueAmt>399443</EOYBookValueAmt>
        <EOYFMVAmt>528125</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,430 shs HollyFrontier Corp</StockNm>
        <EOYBookValueAmt>184955</EOYBookValueAmt>
        <EOYFMVAmt>226462</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>2,800 shs Humana Inc</StockNm>
        <EOYBookValueAmt>420000</EOYBookValueAmt>
        <EOYFMVAmt>802144</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,000 shs Illumina Inc</StockNm>
        <EOYBookValueAmt>304812</EOYBookValueAmt>
        <EOYFMVAmt>299930</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,500 shs Intuit Inc</StockNm>
        <EOYBookValueAmt>319282</EOYBookValueAmt>
        <EOYFMVAmt>295275</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>600 shs Intuitive Surgical Inc</StockNm>
        <EOYBookValueAmt>317632</EOYBookValueAmt>
        <EOYFMVAmt>287352</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,500 shs JPMorgan Chase &amp; Co</StockNm>
        <EOYBookValueAmt>442130</EOYBookValueAmt>
        <EOYFMVAmt>634530</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,000 shs KEMET Corp</StockNm>
        <EOYBookValueAmt>115440</EOYBookValueAmt>
        <EOYFMVAmt>70160</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>3,500 shs Lowes Companies Inc</StockNm>
        <EOYBookValueAmt>351995</EOYBookValueAmt>
        <EOYFMVAmt>323260</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>3,300 shs Marsh &amp; McLennan Cos Inc</StockNm>
        <EOYBookValueAmt>204986</EOYBookValueAmt>
        <EOYFMVAmt>263175</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>3,414 shs Maxim Integrated Products Inc</StockNm>
        <EOYBookValueAmt>186680</EOYBookValueAmt>
        <EOYFMVAmt>173602</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,793 shs McCormick &amp; Company Inc</StockNm>
        <EOYBookValueAmt>173511</EOYBookValueAmt>
        <EOYFMVAmt>249657</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,000 shs Micron Technology Inc</StockNm>
        <EOYBookValueAmt>339052</EOYBookValueAmt>
        <EOYFMVAmt>190380</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>10,000 shs Microsoft Corp</StockNm>
        <EOYBookValueAmt>466499</EOYBookValueAmt>
        <EOYFMVAmt>1015700</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,750 shs Moodys Corp</StockNm>
        <EOYBookValueAmt>317524</EOYBookValueAmt>
        <EOYFMVAmt>245070</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,700 shs Netflix Inc</StockNm>
        <EOYBookValueAmt>681275</EOYBookValueAmt>
        <EOYFMVAmt>455022</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,595 shs Nvidia Corp</StockNm>
        <EOYBookValueAmt>204315</EOYBookValueAmt>
        <EOYFMVAmt>746933</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>2,000 shs Orbotech Ltd</StockNm>
        <EOYBookValueAmt>105202</EOYBookValueAmt>
        <EOYFMVAmt>113080</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,000 shs PayPal Holdings Inc</StockNm>
        <EOYBookValueAmt>445731</EOYBookValueAmt>
        <EOYFMVAmt>420450</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,800 shs Progressive Corp</StockNm>
        <EOYBookValueAmt>201722</EOYBookValueAmt>
        <EOYFMVAmt>349914</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>2,850 shs Salesforce.com Inc</StockNm>
        <EOYBookValueAmt>419406</EOYBookValueAmt>
        <EOYFMVAmt>390364</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>5,000 shs Solaredge Technologies Inc</StockNm>
        <EOYBookValueAmt>140700</EOYBookValueAmt>
        <EOYFMVAmt>175500</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,840 shs Stryker Corp</StockNm>
        <EOYBookValueAmt>201637</EOYBookValueAmt>
        <EOYFMVAmt>288420</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>2,500 shs Take-Two Interactive Inc</StockNm>
        <EOYBookValueAmt>314000</EOYBookValueAmt>
        <EOYFMVAmt>257350</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>24,000 shs TJX Companies Inc</StockNm>
        <EOYBookValueAmt>793800</EOYBookValueAmt>
        <EOYFMVAmt>1073760</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,000 shs UnitedHealth Group Inc</StockNm>
        <EOYBookValueAmt>688400</EOYBookValueAmt>
        <EOYFMVAmt>996480</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,000 shs US Foods Holding Corp</StockNm>
        <EOYBookValueAmt>238074</EOYBookValueAmt>
        <EOYFMVAmt>189840</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>4,500 shs Visa Inc Cl A</StockNm>
        <EOYBookValueAmt>368494</EOYBookValueAmt>
        <EOYFMVAmt>593730</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>3,586 shs VMware Inc Cl A</StockNm>
        <EOYBookValueAmt>427991</EOYBookValueAmt>
        <EOYFMVAmt>491748</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>1,850 shs Vulcan Materials Company</StockNm>
        <EOYBookValueAmt>197609</EOYBookValueAmt>
        <EOYFMVAmt>182780</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>12,000 shs Waste Connections Inc</StockNm>
        <EOYBookValueAmt>685920</EOYBookValueAmt>
        <EOYFMVAmt>891000</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>6,000 shs Xilinx Inc</StockNm>
        <EOYBookValueAmt>399660</EOYBookValueAmt>
        <EOYFMVAmt>511020</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <OtherExpensesSchedule documentId="OtherExpensesSchedule" softwareId="18007218" softwareVersionNum="2018v3.1">
      <OtherExpensesScheduleGrp>
        <Desc>Bank service charges</Desc>
        <RevenueAndExpensesPerBooksAmt>800</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>800</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>Insurance</Desc>
        <RevenueAndExpensesPerBooksAmt>3625</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>3625</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherProfessionalFeesSchedule documentId="OtherProfessionalFeesSchedule" softwareId="18007218" softwareVersionNum="2018v3.1">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>Management services</CategoryTxt>
        <Amt>12000</Amt>
        <NetInvestmentIncomeAmt>7200</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>6000</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="TaxesSchedule" softwareId="18007218" softwareVersionNum="2018v3.1">
      <TaxesDetail>
        <CategoryTxt>Excise tax</CategoryTxt>
        <Amt>8480</Amt>
      </TaxesDetail>
      <TaxesDetail>
        <CategoryTxt>Foreign tax</CategoryTxt>
        <Amt>1740</Amt>
        <NetInvestmentIncomeAmt>1740</NetInvestmentIncomeAmt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>