﻿<?xml version="1.0" encoding="utf-8"?>
<Return xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2016v3.1" xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2017-11-14T12:32:15-06:00</ReturnTs>
    <TaxPeriodEndDt>2016-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1Txt>APERCEN PARTNERS LLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>304 LYTTON AVE SUITE 200</AddressLine1Txt>
        <CityNm>PALO ALTO</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>94301</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2016-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>412063101</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>The Lewis Foundation</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% APERCEN PARTNERS LLC</InCareOfNm>
      <BusinessNameControlTxt>LEWI</BusinessNameControlTxt>
      <PhoneNum>3056629649</PhoneNum>
      <USAddress>
        <AddressLine1Txt>314 Lytton Avenue Suite 200</AddressLine1Txt>
        <CityNm>Palo Alto</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>94301</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>MELONY LEWIS</PersonNm>
      <PersonTitleTxt>Vice President</PersonTitleTxt>
      <SignatureDt>2017-11-03</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>TOM M VAN LOBEN SELS</PreparerPersonNm>
      <PTIN>P00447955</PTIN>
      <PhoneNum>6508047100</PhoneNum>
    </PreparerPersonGrp>
    <FilingSecurityInformation>
      <IPAddress>
        <IPv4AddressTxt>199.66.197.42</IPv4AddressTxt>
      </IPAddress>
      <FederalOriginalSubmissionId>93537320173185000000</FederalOriginalSubmissionId>
      <FederalOriginalSubmissionIdDt>2017-11-14</FederalOriginalSubmissionIdDt>
      <FilingLicenseTypeCd>P</FilingLicenseTypeCd>
      <AtSubmissionCreationDeviceId>865C680ECEAFD462E36BDD0FBE19201521EFBE1F</AtSubmissionCreationDeviceId>
      <AtSubmissionFilingDeviceId>C85A0FC8C41ACB4182DF05932DACB2FF3FC4951C</AtSubmissionFilingDeviceId>
    </FilingSecurityInformation>
    <TaxYr>2016</TaxYr>
    <BuildTS>2021-01-29 14:40:06Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="12">
    <IRS990PF documentId="IRS990PF">
      <AddressChangeInd>X</AddressChangeInd>
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>49485062</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
        <ContriRcvdRevAndExpnssAmt>33126135</ContriRcvdRevAndExpnssAmt>
        <InterestOnSavRevAndExpnssAmt>279577</InterestOnSavRevAndExpnssAmt>
        <InterestOnSavNetInvstIncmAmt>279577</InterestOnSavNetInvstIncmAmt>
        <DividendsRevAndExpnssAmt>106371</DividendsRevAndExpnssAmt>
        <DividendsNetInvstIncmAmt>125875</DividendsNetInvstIncmAmt>
        <NetGainSaleAstRevAndExpnssAmt>-77122</NetGainSaleAstRevAndExpnssAmt>
        <GrossSalesPriceAmt>26587419</GrossSalesPriceAmt>
        <CapGainNetIncmNetInvstIncmAmt>26373036</CapGainNetIncmNetInvstIncmAmt>
        <OtherIncomeRevAndExpnssAmt referenceDocumentId="OtherIncomeSch2">-86788</OtherIncomeRevAndExpnssAmt>
        <OtherIncomeNetInvstIncmAmt>-86788</OtherIncomeNetInvstIncmAmt>
        <TotalRevAndExpnssAmt>33348173</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>26691700</TotalNetInvstIncmAmt>
        <CompOfcrDirTrstRevAndExpnssAmt>0</CompOfcrDirTrstRevAndExpnssAmt>
        <AccountingFeesRevAndExpnssAmt referenceDocumentId="AccountingFeesSch">8289</AccountingFeesRevAndExpnssAmt>
        <AccountingFeesNetInvstIncmAmt>4144</AccountingFeesNetInvstIncmAmt>
        <AccountingFeesAdjNetIncmAmt>0</AccountingFeesAdjNetIncmAmt>
        <AccountingFeesChrtblPrpsAmt>4145</AccountingFeesChrtblPrpsAmt>
        <OtherProfFeesRevAndExpnssAmt referenceDocumentId="OthProfFeesSch">63716</OtherProfFeesRevAndExpnssAmt>
        <OtherProfFeesNetInvstIncmAmt>63716</OtherProfFeesNetInvstIncmAmt>
        <TaxesRevAndExpnssAmt referenceDocumentId="TaxesSchedule">135811</TaxesRevAndExpnssAmt>
        <TaxesNetInvstIncmAmt>2940</TaxesNetInvstIncmAmt>
        <TotOprExpensesRevAndExpnssAmt>207816</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>70800</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesAdjNetIncmAmt>0</TotOprExpensesAdjNetIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>4145</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>1798859</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>1798859</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>2006675</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>70800</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesAdjNetIncmAmt>0</TotalExpensesAdjNetIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>1803004</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>31341498</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>26620900</NetInvestmentIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <SavAndTempCashInvstBOYAmt>3789101</SavAndTempCashInvstBOYAmt>
        <SavAndTempCashInvstEOYAmt>23597254</SavAndTempCashInvstEOYAmt>
        <SavAndTempCashInvstEOYFMVAmt>23597254</SavAndTempCashInvstEOYFMVAmt>
        <CorporateStockBOYAmt>13912792</CorporateStockBOYAmt>
        <CorporateStockEOYAmt referenceDocumentId="InvestCorpStockSch">13759946</CorporateStockEOYAmt>
        <CorporateStockEOYFMVAmt>13759946</CorporateStockEOYFMVAmt>
        <OtherInvestmentsBOYAmt>200000</OtherInvestmentsBOYAmt>
        <OtherInvestmentsEOYAmt referenceDocumentId="InvOtherSch2">12124883</OtherInvestmentsEOYAmt>
        <OtherInvestmentsEOYFMVAmt>12124883</OtherInvestmentsEOYFMVAmt>
        <OtherAssetsBOYAmt referenceDocumentId="OtherAssetsSch">22483</OtherAssetsBOYAmt>
        <OtherAssetsEOYAmt referenceDocumentId="OtherAssetsSch">2979</OtherAssetsEOYAmt>
        <OtherAssetsEOYFMVAmt referenceDocumentId="OtherAssetsSch">2979</OtherAssetsEOYFMVAmt>
        <TotalAssetsBOYAmt>17924376</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>49485062</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>49485062</TotalAssetsEOYFMVAmt>
        <TotalLiabilitiesBOYAmt>0</TotalLiabilitiesBOYAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowSFAS117Ind>X</OrgDoesNotFollowSFAS117Ind>
        <CapitalStockBOYAmt>17924376</CapitalStockBOYAmt>
        <CapitalStockEOYAmt>49485062</CapitalStockEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>17924376</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>49485062</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>17924376</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>49485062</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>17924376</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>31341498</ExcessRevenueOverExpensesAmt>
        <OtherIncreasesAmt referenceDocumentId="OtherIncreasesSch">719120</OtherIncreasesAmt>
        <SubtotalAmt>49984994</SubtotalAmt>
        <OtherDecreasesAmt referenceDocumentId="OtherDecreasesSch">499932</OtherDecreasesAmt>
        <TotNetAstOrFundBalancesEOYAmt>49485062</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>PUBLICLY TRADED SECURITIES</PropertyDesc>
          <HowAcquiredCd>D</HowAcquiredCd>
          <GrossSalesPriceAmt>26587419</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>214383</CostOrOtherBasisAmt>
          <GainOrLossAmt>26373036</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>26373036</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapitalGainNetIncomeAmt>26373036</CapitalGainNetIncomeAmt>
      </CapGainsLossTxInvstIncmDetail>
      <QlfyUndSect4940eReducedTaxGrp>
        <LiableSection4942TaxInd>false</LiableSection4942TaxInd>
        <AdjustedQlfyDistriYr1Amt>1662433</AdjustedQlfyDistriYr1Amt>
        <NetVlNoncharitableAssetsYr1Amt>11936888</NetVlNoncharitableAssetsYr1Amt>
        <DistributionYr1Rt>0.139269</DistributionYr1Rt>
        <AdjustedQlfyDistriYr2Amt>3419660</AdjustedQlfyDistriYr2Amt>
        <NetVlNoncharitableAssetsYr2Amt>3509498</NetVlNoncharitableAssetsYr2Amt>
        <DistributionYr2Rt>0.974401</DistributionYr2Rt>
        <AdjustedQlfyDistriYr3Amt>1399817</AdjustedQlfyDistriYr3Amt>
        <NetVlNoncharitableAssetsYr3Amt>4868557</NetVlNoncharitableAssetsYr3Amt>
        <DistributionYr3Rt>0.287522</DistributionYr3Rt>
        <AdjustedQlfyDistriYr4Amt>56164</AdjustedQlfyDistriYr4Amt>
        <NetVlNoncharitableAssetsYr4Amt>4350713</NetVlNoncharitableAssetsYr4Amt>
        <DistributionYr4Rt>0.012909</DistributionYr4Rt>
        <AdjustedQlfyDistriYr5Amt>78520</AdjustedQlfyDistriYr5Amt>
        <NetVlNoncharitableAssetsYr5Amt>4141687</NetVlNoncharitableAssetsYr5Amt>
        <DistributionYr5Rt>0.018958</DistributionYr5Rt>
        <TotalDistributionRt>1.433059</TotalDistributionRt>
        <AverageDistributionRt>0.286612</AverageDistributionRt>
        <NetVlNoncharitableAssetsAmt>34782012</NetVlNoncharitableAssetsAmt>
        <AdjNetVlNoncharitableAssetsAmt>9968942</AdjNetVlNoncharitableAssetsAmt>
        <NetInvestmentIncomePctAmt>266209</NetInvestmentIncomePctAmt>
        <AdjNonchrtblNetInvstIncmPctAmt>10235151</AdjNonchrtblNetInvstIncmPctAmt>
        <QualifyingDistributionsAmt>1803004</QualifyingDistributionsAmt>
      </QlfyUndSect4940eReducedTaxGrp>
      <ExciseTaxBasedOnInvstIncmGrp>
        <InvestmentIncomeExciseTaxAmt>532418</InvestmentIncomeExciseTaxAmt>
        <SubtotalAmt>532418</SubtotalAmt>
        <TaxBasedOnInvestmentIncomeAmt>532418</TaxBasedOnInvestmentIncomeAmt>
        <EstimatedPlusOvpmtIncmTxAmt>131000</EstimatedPlusOvpmtIncmTxAmt>
        <AppliedToEsTaxAmt>410000</AppliedToEsTaxAmt>
        <TotalPaymentsAndCreditsAmt>541000</TotalPaymentsAndCreditsAmt>
        <Form2220AttachedInd referenceDocumentId="IRS2220">X</Form2220AttachedInd>
        <EsPenaltyAmt>116</EsPenaltyAmt>
        <OverpaymentAmt>8466</OverpaymentAmt>
        <AppliedToESTaxAmt>8466</AppliedToESTaxAmt>
      </ExciseTaxBasedOnInvstIncmGrp>
      <StatementsRegardingActyGrp>
        <LegislativePoliticalActyInd referenceDocumentId="BinaryAttach">false</LegislativePoliticalActyInd>
        <MoreThan100SpentInd>false</MoreThan100SpentInd>
        <Form1120POLFiledInd>false</Form1120POLFiledInd>
        <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
        <ChangesToArticlesOrBylawsInd referenceDocumentId="BinaryAttach">false</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
        <OrganizationDissolvedEtcInd referenceDocumentId="BinaryAttach">false</OrganizationDissolvedEtcInd>
        <Section508eRqrSatisfiedInd>true</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>true</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>CO</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>false</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>false</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>true</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <PersonsWithBooksName>
          <BusinessNameLine1Txt>APERCEN PARTNERS LLC</BusinessNameLine1Txt>
        </PersonsWithBooksName>
        <PhoneNum>6508047100</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1Txt>314 LYTTON AVENUE SUITE 200</AddressLine1Txt>
          <CityNm>Palo Alto</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>false</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>false</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>false</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
        <InfluenceElectionInd>false</InfluenceElectionInd>
        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>false</NoncharitablePurposeInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
        <ProceedsOrNetIncomeInd>false</ProceedsOrNetIncomeInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Adam J Lewis</PersonNm>
          <USAddress>
            <AddressLine1Txt>314 Lytton Avenue Suite 200</AddressLine1Txt>
            <CityNm>Palo Alto</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94301</ZIPCd>
          </USAddress>
          <TitleTxt>President</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>2.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
      </OfficerDirTrstKeyEmplInfoGrp>
      <SummaryOfDirectChrtblActyGrp />
      <SumOfProgramRelatedInvstGrp />
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>14485057</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>8701747</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>12124883</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>35311687</TotalFMVOfUnusedAssetsAmt>
        <AcquisitionIndebtednessAmt>0</AcquisitionIndebtednessAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>35311687</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>529675</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>34782012</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>1739101</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <MinimumInvestmentReturnAmt>1739101</MinimumInvestmentReturnAmt>
        <TaxBasedOnInvestmentIncomeAmt>532418</TaxBasedOnInvestmentIncomeAmt>
        <TotalTaxAmt>532418</TotalTaxAmt>
        <DistributableBeforeAdjAmt>1206683</DistributableBeforeAdjAmt>
        <DistributableBeforeDedAmt>1206683</DistributableBeforeDedAmt>
        <DistributableAsAdjustedAmt>1206683</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <QualifyingDistriPartXIIGrp>
        <ExpensesAndContributionsAmt>1803004</ExpensesAndContributionsAmt>
        <ProgramRelatedInvstTotalAmt>0</ProgramRelatedInvstTotalAmt>
        <CharitableAssetsAcquisPaidAmt>0</CharitableAssetsAcquisPaidAmt>
        <SetAsideSuitabilityTestAmt>0</SetAsideSuitabilityTestAmt>
        <SetAsideCashDistriTestAmt>0</SetAsideCashDistriTestAmt>
        <QualifyingDistributionsAmt>1803004</QualifyingDistributionsAmt>
        <AdjustedQualifyingDistriAmt>1803004</AdjustedQualifyingDistriAmt>
      </QualifyingDistriPartXIIGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>1206683</DistributableAsAdjustedAmt>
        <PriorYear1Yr>2014</PriorYear1Yr>
        <PriorYear2Yr>2013</PriorYear2Yr>
        <PriorYear3Yr>2012</PriorYear3Yr>
        <ExcessDistributionCyovYr3Amt>1157531</ExcessDistributionCyovYr3Amt>
        <ExcessDistributionCyovYr2Amt>3268111</ExcessDistributionCyovYr2Amt>
        <ExcessDistributionCyovYr1Amt>1272460</ExcessDistributionCyovYr1Amt>
        <TotalExcessDistributionCyovAmt>5698102</TotalExcessDistributionCyovAmt>
        <QualifyingDistributionsAmt>1803004</QualifyingDistributionsAmt>
        <AppliedToCurrentYearAmt>1206683</AppliedToCurrentYearAmt>
        <RemainingDistriFromCorpusAmt>596321</RemainingDistriFromCorpusAmt>
        <TotalCorpusAmt>6294423</TotalCorpusAmt>
        <UndistributedIncomeCYAmt>0</UndistributedIncomeCYAmt>
        <ExcessDistriCyovToNextYrAmt>6294423</ExcessDistriCyovToNextYrAmt>
        <ExcessFromYear3Amt>1157531</ExcessFromYear3Amt>
        <ExcessFromYear2Amt>3268111</ExcessFromYear2Amt>
        <ExcessFromYear1Amt>1272460</ExcessFromYear1Amt>
        <ExcessFromCurrentYearAmt>596321</ExcessFromCurrentYearAmt>
      </UndistributedIncomeGrp>
      <PrivateOperatingFoundationsGrp />
      <SupplementaryInformationGrp>
        <ContributingManagerNm>ADAM J LEWIS</ContributingManagerNm>
        <ShareholderManagerNm>NONE</ShareholderManagerNm>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>Aspen Community Foundation</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>Red Brick Center Suite 102A</AddressLine1Txt>
            <CityNm>Aspen</CityNm>
            <StateAbbreviationCd>CO</StateAbbreviationCd>
            <ZIPCd>81611</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>General Support</GrantOrContributionPurposeTxt>
          <Amt>1296697</Amt>
        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>Creative Visions Foundation</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>18820 Pacific Coast Hwy Ste 201</AddressLine1Txt>
            <CityNm>Malibu</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>90265</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>In support of, "Fantastic Fungi"</GrantOrContributionPurposeTxt>
          <Amt>50000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>Pitkin County Library</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>120 North Mill Street</AddressLine1Txt>
            <CityNm>Aspen</CityNm>
            <StateAbbreviationCd>CO</StateAbbreviationCd>
            <ZIPCd>81611</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>General Support</GrantOrContributionPurposeTxt>
          <Amt>252562</Amt>
        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>ACLU Foundation of Colorado</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>303 East 17th Avenue Suite 350</AddressLine1Txt>
            <CityNm>Denver</CityNm>
            <StateAbbreviationCd>CO</StateAbbreviationCd>
            <ZIPCd>80203</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>General Support</GrantOrContributionPurposeTxt>
          <Amt>199600</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>1798859</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <FeesContractsFromGovtAgGrp />
        <MembershipDuesAndAssmntGrp />
        <IntOnSavAndTempCashInvstGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>279577</ExclusionAmt>
        </IntOnSavAndTempCashInvstGrp>
        <DivAndIntFromSecPartVIIGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>19583</ExclusionAmt>
        </DivAndIntFromSecPartVIIGrp>
        <NetRntlIncmReDebtFincdPropGrp />
        <NetRntlIncmReNotDebtFincdProp />
        <NetRentalIncomePersonalPropGrp />
        <OtherInvestmentIncmPartVIIGrp />
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>-77122</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <NetIncomeLossFromSpecialEvtGrp />
        <GrossProfitLossSlsOfInvntryGrp />
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>222038</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>222038</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>
    <IRS990ScheduleB documentId="IRS990ScheduleB">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
        <ContributorNum>1</ContributorNum>
        <ContributorPersonNm>Adam J Lewis</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>201 West Hallam Street</AddressLine1Txt>
          <CityNm>Aspen</CityNm>
          <StateAbbreviationCd>CO</StateAbbreviationCd>
          <ZIPCd>81611</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>29932863</TotalContributionsAmt>
        <NoncashContributionInd>X</NoncashContributionInd>
      </ContributorInformationGrp>
      <ContributorInformationGrp>
        <ContributorNum>2</ContributorNum>
        <ContributorPersonNm>Adam J Lewis Charitable Lead Trust</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>c/o Apercen Partners 314 Lytton Ave</AddressLine1Txt>
          <CityNm>Palo Alto</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>3193272</TotalContributionsAmt>
        <PersonContributionInd>X</PersonContributionInd>
      </ContributorInformationGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>Publicly Traded Securities</NoncashPropertyDesc>
        <FairMarketValueAmt>29932863</FairMarketValueAmt>
        <ReceivedDt>2016-01-01</ReceivedDt>
      </NonCashPropertyContributionGrp>
    </IRS990ScheduleB>
    <AccountingFeesSchedule documentId="AccountingFeesSch">
      <AccountingFeesDetail>
        <CategoryTxt>ACCOUNTING FEES</CategoryTxt>
        <Amt>8289</Amt>
        <NetInvestmentIncomeAmt>4144</NetInvestmentIncomeAmt>
        <DisbursementsCharitablePrpsAmt>4145</DisbursementsCharitablePrpsAmt>
      </AccountingFeesDetail>
    </AccountingFeesSchedule>
    <DepreciationSchedule documentId="DepreciationSch" />
    <InvestmentsCorpStockSchedule documentId="InvestCorpStockSch">
      <InvestmentsCorporateStockGrp>
        <StockNm>BERNSTEIN SHORT DURATION PLUS</StockNm>
        <EOYBookValueAmt>1577280</EOYBookValueAmt>
        <EOYFMVAmt>1577280</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>BERNSTEIN INTER DURATION INST</StockNm>
        <EOYBookValueAmt>3083893</EOYBookValueAmt>
        <EOYFMVAmt>3083893</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>PROGRESSIVE CORP-OHIO</StockNm>
        <EOYBookValueAmt>2683481</EOYBookValueAmt>
        <EOYFMVAmt>2683481</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>SEE ATTACHMENT</StockNm>
        <EOYBookValueAmt>6415292</EOYBookValueAmt>
        <EOYFMVAmt>6415292</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <InvestmentsOtherSchedule2 documentId="InvOtherSch2">
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>CANSURROUND, PBC</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>200000</BookValueAmt>
        <EOYFMVAmt>200000</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>SUMMIT ROCK DIVERSIFIED</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>2015104</BookValueAmt>
        <EOYFMVAmt>2015104</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>SUMMIT ROCK HEDGED EQUITY</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>1999147</BookValueAmt>
        <EOYFMVAmt>1999147</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>SUMMIT ROCK SELECT</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>5810632</BookValueAmt>
        <EOYFMVAmt>5810632</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>SUMMIT ROCK STRATEGIC</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>2000000</BookValueAmt>
        <EOYFMVAmt>2000000</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>SAFER KIDS INC</CategoryOrItemTxt>
        <ListedAtCostOrFMVCd>FMV</ListedAtCostOrFMVCd>
        <BookValueAmt>100000</BookValueAmt>
        <EOYFMVAmt>100000</EOYFMVAmt>
      </InvestmentsOtherGrp>
    </InvestmentsOtherSchedule2>
    <OtherAssetsSchedule documentId="OtherAssetsSch">
      <OtherAssetsScheduleGrp>
        <Desc>INTEREST RECEIVABLE</Desc>
        <EOYBookValueAmt>2979</EOYBookValueAmt>
        <EOYFMVAmt>2979</EOYFMVAmt>
      </OtherAssetsScheduleGrp>
    </OtherAssetsSchedule>
    <OtherDecreasesSchedule documentId="OtherDecreasesSch">
      <OtherDecreasesDetail>
        <Desc>PRIOR PERIOD ADJUSTMENT</Desc>
        <Amt>499932</Amt>
      </OtherDecreasesDetail>
    </OtherDecreasesSchedule>
    <OtherIncomeSchedule2 documentId="OtherIncomeSch2">
      <OtherIncomeDetail>
        <Desc>Accrued Interest Income</Desc>
        <RevenueAndExpensesPerBooksAmt>-19505</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>-19505</NetInvestmentIncomeAmt>
      </OtherIncomeDetail>
      <OtherIncomeDetail>
        <Desc>Amortization of Premiums/Discounts</Desc>
        <RevenueAndExpensesPerBooksAmt>-67283</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>-67283</NetInvestmentIncomeAmt>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
    <OtherIncreasesSchedule documentId="OtherIncreasesSch">
      <OtherIncreasesDetail>
        <Desc>UNREALIZED GAIN/LOSS</Desc>
        <Amt>719120</Amt>
      </OtherIncreasesDetail>
    </OtherIncreasesSchedule>
    <OtherProfessionalFeesSchedule documentId="OthProfFeesSch">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>INVESTMENT MANAGEMENT FEES</CategoryTxt>
        <Amt>63716</Amt>
        <NetInvestmentIncomeAmt>63716</NetInvestmentIncomeAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="TaxesSchedule">
      <TaxesDetail>
        <CategoryTxt>EXCISE TAX EXPENSE</CategoryTxt>
        <Amt>132871</Amt>
      </TaxesDetail>
      <TaxesDetail>
        <CategoryTxt>FOREIGN TAX EXPENSE</CategoryTxt>
        <Amt>2940</Amt>
        <NetInvestmentIncomeAmt>2940</NetInvestmentIncomeAmt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>