﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2013v3.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2014-11-17T11:27:21-08:00</ReturnTs>
    <TaxPeriodEndDt>2013-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1>Smith &amp; DeKay PS CPAs</BusinessNameLine1>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1>600-108th Ave NE Suite 1030</AddressLine1>
        <City>Bellevue</City>
        <State>WA</State>
        <ZIPCode>980045129</ZIPCode>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2013-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>461580680</EIN>
      <BusinessName>
        <BusinessNameLine1>MACK FOUNDATION</BusinessNameLine1>
      </BusinessName>
      <BusinessNameControlTxt>MACK</BusinessNameControlTxt>
      <USAddress>
        <AddressLine1>PMBX 271 HIGH SCHOOL RD</AddressLine1>
        <City>BAINBRIDGE ISLAND</City>
        <State>WA</State>
        <ZIPCode>98110</ZIPCode>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ROBERT BMACK</PersonNm>
      <PersonTitleTxt>Trustee</PersonTitleTxt>
      <SignatureDt>2014-11-17</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>TERRY SMITH</PreparerPersonNm>
      <PTIN>P00011620</PTIN>
      <PhoneNum>4254556600</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2013</TaxYr>
    <BuildTS>2016-02-25 16:41:14Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCount="5">
    <IRS990PF documentId="IRS990PF" referenceDocumentId="GeneralExplanation 990PFBinaryAttachments.1" softwareId="13000170" softwareVersion="2013v3.1">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>1939744</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
        <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
        <DividendsRevAndExpnssAmt>33196</DividendsRevAndExpnssAmt>
        <DividendsNetInvstIncmAmt>33196</DividendsNetInvstIncmAmt>
        <DividendsAdjNetIncmAmt>33196</DividendsAdjNetIncmAmt>
        <NetGainSaleAstRevAndExpnssAmt>254079</NetGainSaleAstRevAndExpnssAmt>
        <GrossSalesPriceAmt>596481</GrossSalesPriceAmt>
        <CapGainNetIncmNetInvstIncmAmt>254079</CapGainNetIncmNetInvstIncmAmt>
        <TotalRevAndExpnssAmt>287275</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>287275</TotalNetInvstIncmAmt>
        <TotalAdjNetIncmAmt>33196</TotalAdjNetIncmAmt>
        <OtherExpensesRevAndExpnssAmt referenceDocumentId="OtherExpensesSchedule AmortizationSchedule">4460</OtherExpensesRevAndExpnssAmt>
        <OtherExpensesNetInvstIncmAmt>4460</OtherExpensesNetInvstIncmAmt>
        <OtherExpensesAdjNetIncmAmt>4460</OtherExpensesAdjNetIncmAmt>
        <TotOprExpensesRevAndExpnssAmt>4460</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>4460</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesAdjNetIncmAmt>4460</TotOprExpensesAdjNetIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>0</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>10000</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>10000</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>14460</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>4460</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesAdjNetIncmAmt>4460</TotalExpensesAdjNetIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>10000</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>272815</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>282815</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>28736</AdjustedNetIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <CorporateStockBOYAmt>1161160</CorporateStockBOYAmt>
        <CorporateStockEOYAmt referenceDocumentId="InvestmentsCorpStockSchedule">1434644</CorporateStockEOYAmt>
        <CorporateStockEOYFMVAmt>1939744</CorporateStockEOYFMVAmt>
        <TotalAssetsBOYAmt>1161160</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>1434644</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>1939744</TotalAssetsEOYFMVAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowSFAS117Ind>X</OrgDoesNotFollowSFAS117Ind>
        <CapitalStockBOYAmt>1161160</CapitalStockBOYAmt>
        <CapitalStockEOYAmt>1161160</CapitalStockEOYAmt>
        <RetainedEarningEOYAmt>273484</RetainedEarningEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>1161160</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>1434644</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>1161160</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>1434644</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>1161160</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>272815</ExcessRevenueOverExpensesAmt>
        <OtherIncreasesAmt referenceDocumentId="OtherIncreasesSchedule">669</OtherIncreasesAmt>
        <SubtotalAmt>1434644</SubtotalAmt>
        <TotNetAstOrFundBalancesEOYAmt>1434644</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail>
        <CapitalGainNetIncomeAmt>254079</CapitalGainNetIncomeAmt>
        <NetShortTermCapitalGainLossAmt>-5631</NetShortTermCapitalGainLossAmt>
      </CapGainsLossTxInvstIncmDetail>
      <QlfyUndSect4940eReducedTaxGrp>
        <LiableSection4942TaxInd>false</LiableSection4942TaxInd>
        <NetVlNoncharitableAssetsYr1Amt>1535469</NetVlNoncharitableAssetsYr1Amt>
        <NetVlNoncharitableAssetsAmt>1535469</NetVlNoncharitableAssetsAmt>
        <NetInvestmentIncomePctAmt>2828</NetInvestmentIncomePctAmt>
        <AdjNonchrtblNetInvstIncmPctAmt>2828</AdjNonchrtblNetInvstIncmPctAmt>
        <QualifyingDistributionsAmt>10000</QualifyingDistributionsAmt>
      </QlfyUndSect4940eReducedTaxGrp>
      <ExciseTaxBasedOnInvstIncmGrp>
        <DomesticOrgMeetingSect4940eInd>X</DomesticOrgMeetingSect4940eInd>
        <InvestmentIncomeExciseTaxAmt>2828</InvestmentIncomeExciseTaxAmt>
        <SubtotalAmt>2828</SubtotalAmt>
        <TaxBasedOnInvestmentIncomeAmt>2828</TaxBasedOnInvestmentIncomeAmt>
        <Form2220AttachedInd referenceDocumentId="IRS2220">X</Form2220AttachedInd>
        <EsPenaltyAmt>63</EsPenaltyAmt>
        <TaxDueAmt>2891</TaxDueAmt>
      </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>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>false</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>false</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
        <PersonsWithBooksName>
          <BusinessNameLine1>SMITH &amp; DEKAY PS CPAs</BusinessNameLine1>
        </PersonsWithBooksName>
        <PhoneNum>4254556600</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1>600 108TH AVE NE 1030</AddressLine1>
          <City>BELLEVUE</City>
          <State>WA</State>
          <ZIPCode>98004</ZIPCode>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>false</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>false</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>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>ROBERT BMACK</PersonNm>
          <USAddress>
            <AddressLine1>PMBX 271 321 HIGH SCHOOL ROAD</AddressLine1>
            <City>BAINBRIDGE ISLAND</City>
            <State>WA</State>
            <ZIPCode>98110</ZIPCode>
          </USAddress>
          <TitleTxt>Trustee</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompOfHghstPdEmplOrNONETxt>NONE</CompOfHghstPdEmplOrNONETxt>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName referenceDocumentId="ContractorProfExpln">
            <BusinessNameLine1>US TRUST</BusinessNameLine1>
          </BusinessName>
          <USAddress>
            <AddressLine1>114 WEST 47TH ST</AddressLine1>
            <City>NEW YORK</City>
            <State>NY</State>
            <ZIPCode>10036</ZIPCode>
          </USAddress>
          <ServiceTypeTxt>INVESTMENT ADVISORY</ServiceTypeTxt>
          <CompensationAmt>4460</CompensationAmt>
        </CompensationOfHghstPdCntrctGrp>
      </OfficerDirTrstKeyEmplInfoGrp>
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>1558852</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>0</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>1558852</TotalFMVOfUnusedAssetsAmt>
        <ReductionClaimedAmt>0</ReductionClaimedAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>1558852</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>23383</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>1535469</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>76773</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <MinimumInvestmentReturnAmt>76773</MinimumInvestmentReturnAmt>
        <TaxBasedOnInvestmentIncomeAmt>2828</TaxBasedOnInvestmentIncomeAmt>
        <TotalTaxAmt>2828</TotalTaxAmt>
        <DistributableBeforeAdjAmt>73945</DistributableBeforeAdjAmt>
        <DistributableBeforeDedAmt>73945</DistributableBeforeDedAmt>
        <DistributableAsAdjustedAmt>73945</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <QualifyingDistriPartXIIGrp>
        <ExpensesAndContributionsAmt>10000</ExpensesAndContributionsAmt>
        <QualifyingDistributionsAmt>10000</QualifyingDistributionsAmt>
        <PctSect4940eOrgNetInvstIncmAmt>2828</PctSect4940eOrgNetInvstIncmAmt>
        <AdjustedQualifyingDistriAmt>7172</AdjustedQualifyingDistriAmt>
      </QualifyingDistriPartXIIGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>73945</DistributableAsAdjustedAmt>
        <UndistributedIncomePYAmt>795</UndistributedIncomePYAmt>
        <QualifyingDistributionsAmt>10000</QualifyingDistributionsAmt>
        <AppliedToYear1Amt>795</AppliedToYear1Amt>
        <TreatedAsDistriFromCorpusAmt>0</TreatedAsDistriFromCorpusAmt>
        <AppliedToCurrentYearAmt>9205</AppliedToCurrentYearAmt>
        <UndistributedIncomeCYAmt>64740</UndistributedIncomeCYAmt>
      </UndistributedIncomeGrp>
      <SupplementaryInformationGrp>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1>MUSIC CENTER OF THE NORTHWEST</BusinessNameLine1>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1>901 N 96TH ST</AddressLine1>
            <City>SEATTLE</City>
            <State>WA</State>
            <ZIPCode>98103</ZIPCode>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>NONE</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>PUBLIC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>GENERAL SUPPORT</GrantOrContributionPurposeTxt>
          <Amt>10000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>10000</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <DivAndIntFromSecPartVIIGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>33196</ExclusionAmt>
        </DivAndIntFromSecPartVIIGrp>
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>1</ExclusionCd>
          <ExclusionAmt>254079</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>287275</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>287275</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>
    <ContractorCompensationExpln documentId="ContractorProfExpln" softwareId="13000170" softwareVersion="2013v3.1">
      <ContractorCompExplnGrp>
        <ContractorBusinessName>
          <BusinessNameLine1>US TRUST</BusinessNameLine1>
        </ContractorBusinessName>
      </ContractorCompExplnGrp>
    </ContractorCompensationExpln>
    <InvestmentsCorpStockSchedule documentId="InvestmentsCorpStockSchedule" softwareId="13000170" softwareVersion="2013v3.1">
      <InvestmentsCorporateStockGrp>
        <StockNm>US TRUST</StockNm>
        <EOYBookValueAmt>1434644</EOYBookValueAmt>
        <EOYFMVAmt>1939744</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <OtherExpensesSchedule documentId="OtherExpensesSchedule" softwareId="13000170" softwareVersion="2013v3.1">
      <OtherExpensesScheduleGrp>
        <Desc>INVESTMENT MGMT FEE</Desc>
        <RevenueAndExpensesPerBooksAmt>4460</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>4460</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>4460</AdjustedNetIncomeAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherIncreasesSchedule documentId="OtherIncreasesSchedule" softwareId="13000170" softwareVersion="2013v3.1">
      <OtherIncreasesDetail>
        <Description>NONDIVIDEND DISTRIBUTIONS</Description>
        <Amount>669</Amount>
      </OtherIncreasesDetail>
    </OtherIncreasesSchedule>
  </ReturnData>
</Return>