<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2021v4.2">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2022-05-25T15:21:28-05:00</ReturnTs>
    <TaxPeriodEndDt>2021-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>410746749</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>CLIFTONLARSONALLEN LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>10401 W INNOVATION DR STE 300</AddressLine1Txt>
        <CityNm>WAUWATOSA</CityNm>
        <StateAbbreviationCd>WI</StateAbbreviationCd>
        <ZIPCd>53226</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2021-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>391775567</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>KELLOGG FAMILY FOUNDATION</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>C/O GODFREY &amp; KAHN SC</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>KELL</BusinessNameControlTxt>
      <PhoneNum>4142733500</PhoneNum>
      <USAddress>
        <AddressLine1Txt>833 E MICHIGAN ST 1800</AddressLine1Txt>
        <CityNm>MILWAUKEE</CityNm>
        <StateAbbreviationCd>WI</StateAbbreviationCd>
        <ZIPCd>532025615</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>PETER SOMMERHAUSER</PersonNm>
      <PersonTitleTxt>ASST SECRETARY</PersonTitleTxt>
      <PhoneNum>4142733500</PhoneNum>
      <SignatureDt>2022-05-25</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>PETER</PersonFirstNm>
        <PersonLastNm>SOMMERHAUSER</PersonLastNm>
      </PersonFullName>
      <SSN>XXX-XX-XXXX</SSN>
    </SigningOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>AUSTIN BENNETT</PreparerPersonNm>
      <PTIN>P01227463</PTIN>
      <PhoneNum>4144761880</PhoneNum>
      <PreparationDt>2022-05-25</PreparationDt>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>3</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2021</TaxYr>
    <BuildTS>2022-09-23 18:48:47Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="12">
    <IRS990PF documentId="RetDoc1235000001">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>58572942</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
        <ContriRcvdRevAndExpnssAmt>10906661</ContriRcvdRevAndExpnssAmt>
        <InterestOnSavRevAndExpnssAmt>460</InterestOnSavRevAndExpnssAmt>
        <InterestOnSavNetInvstIncmAmt>460</InterestOnSavNetInvstIncmAmt>
        <DividendsRevAndExpnssAmt>594619</DividendsRevAndExpnssAmt>
        <DividendsNetInvstIncmAmt>594619</DividendsNetInvstIncmAmt>
        <NetGainSaleAstRevAndExpnssAmt>1339229</NetGainSaleAstRevAndExpnssAmt>
        <GrossSalesPriceAmt>2498133</GrossSalesPriceAmt>
        <CapGainNetIncmNetInvstIncmAmt>1339229</CapGainNetIncmNetInvstIncmAmt>
        <OtherIncomeRevAndExpnssAmt referenceDocumentId="RetDoc2001500001">1085</OtherIncomeRevAndExpnssAmt>
        <OtherIncomeNetInvstIncmAmt>0</OtherIncomeNetInvstIncmAmt>
        <OtherIncomeAdjNetIncmAmt>0</OtherIncomeAdjNetIncmAmt>
        <TotalRevAndExpnssAmt>12842054</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>1934308</TotalNetInvstIncmAmt>
        <TotalAdjNetIncmAmt>0</TotalAdjNetIncmAmt>
        <CompOfcrDirTrstRevAndExpnssAmt>0</CompOfcrDirTrstRevAndExpnssAmt>
        <CompOfcrDirTrstNetInvstIncmAmt>0</CompOfcrDirTrstNetInvstIncmAmt>
        <CompOfcrDirTrstAdjNetIncmAmt>0</CompOfcrDirTrstAdjNetIncmAmt>
        <CompOfcrDirTrstDsbrsChrtblAmt>0</CompOfcrDirTrstDsbrsChrtblAmt>
        <LegalFeesRevAndExpnssAmt referenceDocumentId="RetDoc2002100001">14698</LegalFeesRevAndExpnssAmt>
        <LegalFeesNetInvstIncmAmt>7349</LegalFeesNetInvstIncmAmt>
        <LegalFeesAdjNetIncmAmt>0</LegalFeesAdjNetIncmAmt>
        <LegalFeesDsbrsChrtblAmt>7349</LegalFeesDsbrsChrtblAmt>
        <AccountingFeesRevAndExpnssAmt referenceDocumentId="RetDoc2002200001">6615</AccountingFeesRevAndExpnssAmt>
        <AccountingFeesNetInvstIncmAmt>3308</AccountingFeesNetInvstIncmAmt>
        <AccountingFeesAdjNetIncmAmt>0</AccountingFeesAdjNetIncmAmt>
        <AccountingFeesChrtblPrpsAmt>3307</AccountingFeesChrtblPrpsAmt>
        <OtherProfFeesRevAndExpnssAmt referenceDocumentId="RetDoc2002300001">142088</OtherProfFeesRevAndExpnssAmt>
        <OtherProfFeesNetInvstIncmAmt>142088</OtherProfFeesNetInvstIncmAmt>
        <OtherProfFeesAdjNetIncmAmt>0</OtherProfFeesAdjNetIncmAmt>
        <OtherProfFeesDsbrsChrtblAmt>0</OtherProfFeesDsbrsChrtblAmt>
        <TaxesRevAndExpnssAmt referenceDocumentId="RetDoc2002500001">40846</TaxesRevAndExpnssAmt>
        <TaxesNetInvstIncmAmt>0</TaxesNetInvstIncmAmt>
        <TaxesAdjNetIncmAmt>0</TaxesAdjNetIncmAmt>
        <TaxesDsbrsChrtblAmt>0</TaxesDsbrsChrtblAmt>
        <DeprecAndDpltnRevAndExpnssAmt referenceDocumentId="RetDoc2203000001">254333</DeprecAndDpltnRevAndExpnssAmt>
        <DeprecAndDpltnNetInvstIncmAmt>0</DeprecAndDpltnNetInvstIncmAmt>
        <DeprecAndDpltnAdjNetIncmAmt>0</DeprecAndDpltnAdjNetIncmAmt>
        <TotOprExpensesRevAndExpnssAmt>458580</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>152745</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesAdjNetIncmAmt>0</TotOprExpensesAdjNetIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>10656</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>5000</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>5000</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>463580</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>152745</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesAdjNetIncmAmt>0</TotalExpensesAdjNetIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>15656</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>12378474</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>1781563</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <CashBOYAmt>2302</CashBOYAmt>
        <CashEOYAmt>9703</CashEOYAmt>
        <CashEOYFMVAmt>9703</CashEOYFMVAmt>
        <SavAndTempCashInvstBOYAmt>2540468</SavAndTempCashInvstBOYAmt>
        <SavAndTempCashInvstEOYAmt>7409476</SavAndTempCashInvstEOYAmt>
        <SavAndTempCashInvstEOYFMVAmt>7409476</SavAndTempCashInvstEOYFMVAmt>
        <CorporateStockBOYAmt>22602379</CorporateStockBOYAmt>
        <CorporateStockEOYAmt referenceDocumentId="RetDoc2018900001">27052011</CorporateStockEOYAmt>
        <CorporateStockEOYFMVAmt>40855917</CorporateStockEOYFMVAmt>
        <CorporateBondsBOYAmt>5061079</CorporateBondsBOYAmt>
        <CorporateBondsEOYAmt referenceDocumentId="RetDoc2044400001">5670932</CorporateBondsEOYAmt>
        <CorporateBondsEOYFMVAmt>5499845</CorporateBondsEOYFMVAmt>
        <LandBldgEquipCostOrOtherBssAmt>8115269</LandBldgEquipCostOrOtherBssAmt>
        <LandBldgEquipAccumDeprecAmt>3317268</LandBldgEquipAccumDeprecAmt>
        <LandBOYAmt>5052334</LandBOYAmt>
        <LandEOYAmt referenceDocumentId="RetDoc2059000001">4798001</LandEOYAmt>
        <LandEOYFMVAmt>4798001</LandEOYFMVAmt>
        <TotalAssetsBOYAmt>35258562</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>44940123</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>58572942</TotalAssetsEOYFMVAmt>
        <TotalLiabilitiesBOYAmt>0</TotalLiabilitiesBOYAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
        <CapitalStockBOYAmt>0</CapitalStockBOYAmt>
        <CapitalStockEOYAmt>0</CapitalStockEOYAmt>
        <AdditionalPaidInCapitalBOYAmt>0</AdditionalPaidInCapitalBOYAmt>
        <AdditionalPaidInCapitalEOYAmt>0</AdditionalPaidInCapitalEOYAmt>
        <RetainedEarningBOYAmt>35258562</RetainedEarningBOYAmt>
        <RetainedEarningEOYAmt>44940123</RetainedEarningEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>35258562</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>44940123</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>35258562</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>44940123</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>35258562</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>12378474</ExcessRevenueOverExpensesAmt>
        <OtherIncreasesAmt>0</OtherIncreasesAmt>
        <SubtotalAmt>47637036</SubtotalAmt>
        <OtherDecreasesAmt referenceDocumentId="RetDoc2049800001">2696913</OtherDecreasesAmt>
        <TotNetAstOrFundBalancesEOYAmt>44940123</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>PUBLICLY TRADED SECURITIES</PropertyDesc>
          <GrossSalesPriceAmt>1295191</GrossSalesPriceAmt>
          <CostOrOtherBasisAmt>1158904</CostOrOtherBasisAmt>
          <GainOrLossAmt>136287</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>136287</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapGainsLossTxInvstIncmGrp>
          <PropertyDesc>RENTAL PROPERTY-RESIDUAL PROCEEDS</PropertyDesc>
          <HowAcquiredCd>P</HowAcquiredCd>
          <AcquiredDt>2003-12-12</AcquiredDt>
          <SoldDt>2020-09-01</SoldDt>
          <GrossSalesPriceAmt>1202942</GrossSalesPriceAmt>
          <DepreciationAmt>0</DepreciationAmt>
          <GainOrLossAmt>1202942</GainOrLossAmt>
          <GainsMinusExcessOrLossesAmt>1202942</GainsMinusExcessOrLossesAmt>
        </CapGainsLossTxInvstIncmGrp>
        <CapitalGainNetIncomeAmt>1339229</CapitalGainNetIncomeAmt>
      </CapGainsLossTxInvstIncmDetail>
      <ExciseTaxBasedOnInvstIncmGrp>
        <InvestmentIncomeExciseTaxAmt>24764</InvestmentIncomeExciseTaxAmt>
        <TaxUnderSection511Amt>0</TaxUnderSection511Amt>
        <SubtotalAmt>24764</SubtotalAmt>
        <SubtitleATaxAmt>0</SubtitleATaxAmt>
        <TaxBasedOnInvestmentIncomeAmt>24764</TaxBasedOnInvestmentIncomeAmt>
        <EstimatedPlusOvpmtIncmTxAmt>35556</EstimatedPlusOvpmtIncmTxAmt>
        <ExemptFrgnOrgTaxWthldAtSrceAmt>0</ExemptFrgnOrgTaxWthldAtSrceAmt>
        <ExtsnRequestIncomeTaxPaidAmt>0</ExtsnRequestIncomeTaxPaidAmt>
        <BackupWithholdingWithheldAmt>0</BackupWithholdingWithheldAmt>
        <TotalPaymentsAndCreditsAmt>35556</TotalPaymentsAndCreditsAmt>
        <EsPenaltyAmt>0</EsPenaltyAmt>
        <OverpaymentAmt>10792</OverpaymentAmt>
        <AppliedToESTaxAmt>10792</AppliedToESTaxAmt>
        <RefundAmt>0</RefundAmt>
      </ExciseTaxBasedOnInvstIncmGrp>
      <StatementsRegardingActyGrp>
        <LegislativePoliticalActyInd>0</LegislativePoliticalActyInd>
        <MoreThan100SpentInd>0</MoreThan100SpentInd>
        <Form1120POLFiledInd>0</Form1120POLFiledInd>
        <Section4955OrganizationTaxAmt>0</Section4955OrganizationTaxAmt>
        <Section4955ManagersTaxAmt>0</Section4955ManagersTaxAmt>
        <TaxReimbursedAmt>0</TaxReimbursedAmt>
        <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
        <ChangesToArticlesOrBylawsInd>0</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>0</UnrelatedBusIncmOverLimitInd>
        <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
        <Section508eRqrSatisfiedInd>1</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>1</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>WI</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>1</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>0</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>0</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>0</OwnControlledEntityInd>
        <DonorAdvisedFundInd>0</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>1</ComplyWithPublicInspRqrInd>
        <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
        <IndividualWithBooksNm>GODFREY KAHN SC</IndividualWithBooksNm>
        <PhoneNum>4142733500</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1Txt>833 E MICHIGAN ST 1800</AddressLine1Txt>
          <CityNm>MILWAUKEE</CityNm>
          <StateAbbreviationCd>WI</StateAbbreviationCd>
          <ZIPCd>53202</ZIPCd>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>0</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>0</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>0</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>0</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>0</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>0</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>0</PaymentToGovernmentOfficialInd>
        <UncorrectedPriorActsInd>0</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>0</UndistributedIncomePYInd>
        <BusinessHoldingsInd>0</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>0</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>0</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>0</InfluenceLegislationInd>
        <InfluenceElectionInd>0</InfluenceElectionInd>
        <GrantsToIndividualsInd>0</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>0</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>0</NoncharitablePurposeInd>
        <TransactionsFailToQlfyAsExcInd>0</TransactionsFailToQlfyAsExcInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>0</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>0</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
        <SubjToTaxRmnrtnExPrchtPymtInd>0</SubjToTaxRmnrtnExPrchtPymtInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>WILLIAM S KELLOGG</PersonNm>
          <USAddress>
            <AddressLine1Txt>C/O GODFREY KAHN 833 E MICHIGAN ST</AddressLine1Txt>
            <AddressLine2Txt>STE 1800</AddressLine2Txt>
            <CityNm>MILWAUKEE</CityNm>
            <StateAbbreviationCd>WI</StateAbbreviationCd>
            <ZIPCd>53202</ZIPCd>
          </USAddress>
          <TitleTxt>PRES/TREAS</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>MADELAINE KELLOGG</PersonNm>
          <USAddress>
            <AddressLine1Txt>C/O GODFREY KAHN 833 E MICHIGAN ST</AddressLine1Txt>
            <AddressLine2Txt>STE 1800</AddressLine2Txt>
            <CityNm>MILWAUKEE</CityNm>
            <StateAbbreviationCd>WI</StateAbbreviationCd>
            <ZIPCd>53202</ZIPCd>
          </USAddress>
          <TitleTxt>VP/SEC</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>PETER M SOMMERHAUSER</PersonNm>
          <USAddress>
            <AddressLine1Txt>C/O GODFREY KAHN 833 E MICHIGAN ST</AddressLine1Txt>
            <AddressLine2Txt>STE 1800</AddressLine2Txt>
            <CityNm>MILWAUKEE</CityNm>
            <StateAbbreviationCd>WI</StateAbbreviationCd>
            <ZIPCd>53202</ZIPCd>
          </USAddress>
          <TitleTxt>ASSIST. SEC</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.25</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompOfHghstPdEmplOrNONETxt>NONE</CompOfHghstPdEmplOrNONETxt>
        <OtherEmployeePaidOver50kCnt>0</OtherEmployeePaidOver50kCnt>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>ROBERT W BAIRD &amp; CO (NISWONGER GROUP)</BusinessNameLine1Txt>
          </BusinessName>
          <USAddress>
            <AddressLine1Txt>PO BOX 672</AddressLine1Txt>
            <CityNm>MILWAUKEE</CityNm>
            <StateAbbreviationCd>WI</StateAbbreviationCd>
            <ZIPCd>53201</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>INVESTMENT MGMT</ServiceTypeTxt>
          <CompensationAmt>125918</CompensationAmt>
        </CompensationOfHghstPdCntrctGrp>
        <ContractorPaidOver50kCnt>0</ContractorPaidOver50kCnt>
      </OfficerDirTrstKeyEmplInfoGrp>
      <SummaryOfDirectChrtblActyGrp>
        <Expenses1Amt>0</Expenses1Amt>
      </SummaryOfDirectChrtblActyGrp>
      <SumOfProgramRelatedInvstGrp>
        <TotalAmt>0</TotalAmt>
      </SumOfProgramRelatedInvstGrp>
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>36848594</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>2674992</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>39523586</TotalFMVOfUnusedAssetsAmt>
        <ReductionClaimedAmt>0</ReductionClaimedAmt>
        <AcquisitionIndebtednessAmt>0</AcquisitionIndebtednessAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>39523586</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>592854</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>38930732</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>1946537</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <MinimumInvestmentReturnAmt>1946537</MinimumInvestmentReturnAmt>
        <TaxBasedOnInvestmentIncomeAmt>24764</TaxBasedOnInvestmentIncomeAmt>
        <TotalTaxAmt>24764</TotalTaxAmt>
        <DistributableBeforeAdjAmt>1921773</DistributableBeforeAdjAmt>
        <RecoveriesQualfiedDistriAmt>0</RecoveriesQualfiedDistriAmt>
        <DistributableBeforeDedAmt>1921773</DistributableBeforeDedAmt>
        <DeductionFromDistributableAmt>0</DeductionFromDistributableAmt>
        <DistributableAsAdjustedAmt>1921773</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <PFQualifyingDistributionsGrp>
        <ExpensesAndContributionsAmt>15656</ExpensesAndContributionsAmt>
        <ProgramRelatedInvstTotalAmt>0</ProgramRelatedInvstTotalAmt>
        <QualifyingDistributionsAmt>15656</QualifyingDistributionsAmt>
      </PFQualifyingDistributionsGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>1921773</DistributableAsAdjustedAmt>
        <UndistributedIncomePYAmt>0</UndistributedIncomePYAmt>
        <TotalForPriorYearsAmt>0</TotalForPriorYearsAmt>
        <ExcessDistributionCyovYr5Amt>2087239</ExcessDistributionCyovYr5Amt>
        <ExcessDistributionCyovYr4Amt>2914405</ExcessDistributionCyovYr4Amt>
        <ExcessDistributionCyovYr3Amt>1795567</ExcessDistributionCyovYr3Amt>
        <TotalExcessDistributionCyovAmt>6797211</TotalExcessDistributionCyovAmt>
        <QualifyingDistributionsAmt>15656</QualifyingDistributionsAmt>
        <AppliedToYear1Amt>0</AppliedToYear1Amt>
        <AppliedToPriorYearsAmt>0</AppliedToPriorYearsAmt>
        <TreatedAsDistriFromCorpusAmt>0</TreatedAsDistriFromCorpusAmt>
        <AppliedToCurrentYearAmt>15656</AppliedToCurrentYearAmt>
        <RemainingDistriFromCorpusAmt>0</RemainingDistriFromCorpusAmt>
        <ExcessDistriCyovAppCYCorpusAmt>1906117</ExcessDistriCyovAppCYCorpusAmt>
        <ExcessDistributionCyovAppCYAmt>1906117</ExcessDistributionCyovAppCYAmt>
        <TotalCorpusAmt>4891094</TotalCorpusAmt>
        <PriorYearUndistributedIncmAmt>0</PriorYearUndistributedIncmAmt>
        <PriorYearDeficiencyOrTaxAmt>0</PriorYearDeficiencyOrTaxAmt>
        <Taxable1Amt>0</Taxable1Amt>
        <Taxable2Amt>0</Taxable2Amt>
        <UndistributedIncomeCYAmt>0</UndistributedIncomeCYAmt>
        <CorpusDistri170b1EOr4942g3Amt>0</CorpusDistri170b1EOr4942g3Amt>
        <ExcessDistriCyovFromYr5Amt>181122</ExcessDistriCyovFromYr5Amt>
        <ExcessDistriCyovToNextYrAmt>4709972</ExcessDistriCyovToNextYrAmt>
        <ExcessFromYear4Amt>2914405</ExcessFromYear4Amt>
        <ExcessFromYear3Amt>1795567</ExcessFromYear3Amt>
      </UndistributedIncomeGrp>
      <SupplementaryInformationGrp>
        <ContributingManagerNm>WILLIAM S KELLOGG</ContributingManagerNm>
        <ContributingManagerNm>MADELAINE KELLOGG</ContributingManagerNm>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>MEMORIAL SLOAN KETTERING CANCER CENTER</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>1275 YORK AVENUE</AddressLine1Txt>
            <CityNm>NEW YORK</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>10065</ZIPCd>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>NONE</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>GENERAL OPERATING</GrantOrContributionPurposeTxt>
          <Amt>5000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>5000</TotalGrantOrContriPdDurYrAmt>
        <TotalGrantOrContriApprvFutAmt>0</TotalGrantOrContriApprvFutAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <IntOnSavAndTempCashInvstGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>460</ExclusionAmt>
        </IntOnSavAndTempCashInvstGrp>
        <DividendsAndInterestFromSecDtl>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>594619</ExclusionAmt>
        </DividendsAndInterestFromSecDtl>
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>1339229</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <OtherRevenueDescribedGrp>
          <Desc>STATE TAX REFUND</Desc>
          <ExclusionCd>01</ExclusionCd>
          <ExclusionAmt>1085</ExclusionAmt>
        </OtherRevenueDescribedGrp>
        <SubtotalsIncmProducingActyGrp>
          <UnrelatedBusinessTaxblIncmAmt>0</UnrelatedBusinessTaxblIncmAmt>
          <ExclusionAmt>1935393</ExclusionAmt>
          <RelatedOrExemptFunctionIncmAmt>0</RelatedOrExemptFunctionIncmAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>1935393</TotalIncomeProducingActyAmt>
      </AnalysisIncomeProducingActyGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>0</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>0</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>0</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>0</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>0</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>0</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>0</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>0</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>0</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>0</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
        <ContributorNum>1</ContributorNum>
        <ContributorPersonNm>WILLIAM KELLOGG</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>C/O GODFREY KAHN 833 E MICHIGAN ST</AddressLine1Txt>
          <CityNm>MILWAUKEE</CityNm>
          <StateAbbreviationCd>WI</StateAbbreviationCd>
          <ZIPCd>532025615</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>10906661</TotalContributionsAmt>
        <PersonContributionInd>X</PersonContributionInd>
        <NoncashContributionInd>X</NoncashContributionInd>
      </ContributorInformationGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>33,907 SH ISHARES CORE S&amp;P TOTAL US STOCK MARKET</NoncashPropertyDesc>
        <FairMarketValueAmt>3579901</FairMarketValueAmt>
        <ReceivedDt>2021-12-23</ReceivedDt>
      </NonCashPropertyContributionGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>8,039 SH SPDR S&amp;P 500 ETF</NoncashPropertyDesc>
        <FairMarketValueAmt>3759760</FairMarketValueAmt>
        <ReceivedDt>2021-12-23</ReceivedDt>
      </NonCashPropertyContributionGrp>
    </IRS990ScheduleB>
    <AccountingFeesSchedule documentId="RetDoc2002200001">
      <AccountingFeesDetail>
        <CategoryTxt>ACCOUNTING FEES</CategoryTxt>
        <Amt>6615</Amt>
        <NetInvestmentIncomeAmt>3308</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>3307</DisbursementsCharitablePrpsAmt>
      </AccountingFeesDetail>
    </AccountingFeesSchedule>
    <DepreciationSchedule documentId="RetDoc2203000001">
      <DepreciationPropertyGrp>
        <PropertyDesc>LAND</PropertyDesc>
        <AcquiredDt>2009-01-01</AcquiredDt>
        <CostOrOtherBasisAmt>1181707</CostOrOtherBasisAmt>
        <ComputationMethodTxt>L</ComputationMethodTxt>
        <CurrentYearExpenseAmt>0</CurrentYearExpenseAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
      </DepreciationPropertyGrp>
      <DepreciationPropertyGrp>
        <PropertyDesc>CAMP BUILDING</PropertyDesc>
        <AcquiredDt>2009-01-01</AcquiredDt>
        <CostOrOtherBasisAmt>6746939</CostOrOtherBasisAmt>
        <PriorYearDepreciationAmt>2942130</PriorYearDepreciationAmt>
        <ComputationMethodTxt>SL</ComputationMethodTxt>
        <LifeRt>27.500000000000</LifeRt>
        <CurrentYearExpenseAmt>244845</CurrentYearExpenseAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>244845</AdjustedNetIncomeAmt>
      </DepreciationPropertyGrp>
      <DepreciationPropertyGrp>
        <PropertyDesc>LAND IMPROVEMENT</PropertyDesc>
        <AcquiredDt>2008-12-01</AcquiredDt>
        <CostOrOtherBasisAmt>177223</CostOrOtherBasisAmt>
        <PriorYearDepreciationAmt>113442</PriorYearDepreciationAmt>
        <ComputationMethodTxt>SL</ComputationMethodTxt>
        <LifeRt>20.000000000000</LifeRt>
        <CurrentYearExpenseAmt>8861</CurrentYearExpenseAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>8861</AdjustedNetIncomeAmt>
      </DepreciationPropertyGrp>
      <DepreciationPropertyGrp>
        <PropertyDesc>BUILDING IMPROVEMENT</PropertyDesc>
        <AcquiredDt>2009-04-07</AcquiredDt>
        <CostOrOtherBasisAmt>9400</CostOrOtherBasisAmt>
        <PriorYearDepreciationAmt>7363</PriorYearDepreciationAmt>
        <ComputationMethodTxt>SL</ComputationMethodTxt>
        <LifeRt>15.000000000000</LifeRt>
        <CurrentYearExpenseAmt>627</CurrentYearExpenseAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>627</AdjustedNetIncomeAmt>
      </DepreciationPropertyGrp>
    </DepreciationSchedule>
    <InvestmentsCorpBondsSchedule documentId="RetDoc2044400001">
      <InvestmentsCorporateBondsGrp>
        <BondNm>41,502 SH ISHARES BOXX INVESTMENT GRADE CORPORATE BOND FUND</BondNm>
        <EOYBookValueAmt>5670932</EOYBookValueAmt>
        <EOYFMVAmt>5499845</EOYFMVAmt>
      </InvestmentsCorporateBondsGrp>
    </InvestmentsCorpBondsSchedule>
    <InvestmentsCorpStockSchedule documentId="RetDoc2018900001">
      <InvestmentsCorporateStockGrp>
        <StockNm>22,439 SH SPDR GOLD SHARES</StockNm>
        <EOYBookValueAmt>3441767</EOYBookValueAmt>
        <EOYFMVAmt>3836171</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>36,366 SH VANGUARD INDEX S&amp;P 500 ETF</StockNm>
        <EOYBookValueAmt>8965958</EOYBookValueAmt>
        <EOYFMVAmt>15876305</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>17,140 SH VANGUARD MID-CAP ETF</StockNm>
        <EOYBookValueAmt>2550509</EOYBookValueAmt>
        <EOYFMVAmt>4366758</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>19,832 SH ISHARES S&amp;P SMALLCAP 600 GROWTH INDEX</StockNm>
        <EOYBookValueAmt>1768637</EOYBookValueAmt>
        <EOYFMVAmt>2752682</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>54,651 SH ISHARES CORE MSCI EAFE ETF</StockNm>
        <EOYBookValueAmt>3429916</EOYBookValueAmt>
        <EOYFMVAmt>4079151</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>41,752 SH ISHARES CORE MSCI EMERGING MARKETS ETF</StockNm>
        <EOYBookValueAmt>2252476</EOYBookValueAmt>
        <EOYFMVAmt>2499275</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>33,907 SH ISHARES CORE S&amp;P TOTAL US STOCK MARKET ETF</StockNm>
        <EOYBookValueAmt>2642703</EOYBookValueAmt>
        <EOYFMVAmt>3627371</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>8,039 SH SPDR S&amp;P 500 ETF TRUST UNIT-SERIES 1</StockNm>
        <EOYBookValueAmt>2000045</EOYBookValueAmt>
        <EOYFMVAmt>3818204</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <LandEtcSchedule2 documentId="RetDoc2059000001">
      <LandEtcGrp>
        <CategoryOrItemTxt>LAND</CategoryOrItemTxt>
        <CostOrOtherBasisAmt>1181707</CostOrOtherBasisAmt>
        <AccumulatedDepreciationAmt>0</AccumulatedDepreciationAmt>
        <BookValueAmt>1181707</BookValueAmt>
        <EOYFMVAmt>1181707</EOYFMVAmt>
      </LandEtcGrp>
      <LandEtcGrp>
        <CategoryOrItemTxt>CAMP BUILDING</CategoryOrItemTxt>
        <CostOrOtherBasisAmt>6746939</CostOrOtherBasisAmt>
        <AccumulatedDepreciationAmt>3186975</AccumulatedDepreciationAmt>
        <BookValueAmt>3559964</BookValueAmt>
        <EOYFMVAmt>3559964</EOYFMVAmt>
      </LandEtcGrp>
      <LandEtcGrp>
        <CategoryOrItemTxt>LAND IMPROVEMENT</CategoryOrItemTxt>
        <CostOrOtherBasisAmt>177223</CostOrOtherBasisAmt>
        <AccumulatedDepreciationAmt>122303</AccumulatedDepreciationAmt>
        <BookValueAmt>54920</BookValueAmt>
        <EOYFMVAmt>54920</EOYFMVAmt>
      </LandEtcGrp>
      <LandEtcGrp>
        <CategoryOrItemTxt>BUILDING IMPROVEMENT</CategoryOrItemTxt>
        <CostOrOtherBasisAmt>9400</CostOrOtherBasisAmt>
        <AccumulatedDepreciationAmt>7990</AccumulatedDepreciationAmt>
        <BookValueAmt>1410</BookValueAmt>
        <EOYFMVAmt>1410</EOYFMVAmt>
      </LandEtcGrp>
    </LandEtcSchedule2>
    <LegalFeesSchedule documentId="RetDoc2002100001">
      <LegalFeesGrp>
        <CategoryTxt>LEGAL FEES</CategoryTxt>
        <LegalFeesAmt>14698</LegalFeesAmt>
        <NetInvestmentIncomeAmt>7349</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>7349</DisbursementsCharitablePrpsAmt>
      </LegalFeesGrp>
    </LegalFeesSchedule>
    <OtherDecreasesSchedule documentId="RetDoc2049800001">
      <OtherDecreasesDetail>
        <Desc>BOOK/990 DIFFERENCE - DONATED STOCK VALUE</Desc>
        <Amt>2696913</Amt>
      </OtherDecreasesDetail>
    </OtherDecreasesSchedule>
    <OtherIncomeSchedule2 documentId="RetDoc2001500001">
      <OtherIncomeDetail>
        <Desc>STATE TAX REFUND</Desc>
        <RevenueAndExpensesPerBooksAmt>1085</RevenueAndExpensesPerBooksAmt>
        <AdjustedNetIncomeAmt>1085</AdjustedNetIncomeAmt>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
    <OtherProfessionalFeesSchedule documentId="RetDoc2002300001">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>INVESTMENT MANAGEMENT FEES</CategoryTxt>
        <Amt>142088</Amt>
        <NetInvestmentIncomeAmt>142088</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="RetDoc2002500001">
      <TaxesDetail>
        <CategoryTxt>EXCISE TAX - EXTENSION PYMT</CategoryTxt>
        <Amt>40846</Amt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>
