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        <StateAbbreviationCd>WA</StateAbbreviationCd>
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        <UndistributedIncomeCYAmt>0</UndistributedIncomeCYAmt>
        <ExcessDistriCyovToNextYrAmt>1008278</ExcessDistriCyovToNextYrAmt>
        <ExcessFromCurrentYearAmt>1008278</ExcessFromCurrentYearAmt>
      </UndistributedIncomeGrp>
      <PrivateOperatingFoundationsGrp></PrivateOperatingFoundationsGrp>
      <SupplementaryInformationGrp>
        <ContributingManagerNm>MARK VADON</ContributingManagerNm>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>ATTACHMENT A</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>1201 WESTERN AVENUE 406</AddressLine1Txt>
            <CityNm>SEATTLE</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98101</ZIPCd>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>N/A</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>SEE ATTACHMENT A</GrantOrContributionPurposeTxt>
          <Amt>3009675</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>3009675</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <FeesContractsFromGovtAgGrp />
        <MembershipDuesAndAssmntGrp />
        <IntOnSavAndTempCashInvstGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>12207</ExclusionAmt>
        </IntOnSavAndTempCashInvstGrp>
        <DivAndIntFromSecPartVIIGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>1130518</ExclusionAmt>
        </DivAndIntFromSecPartVIIGrp>
        <NetRntlIncmReDebtFincdPropGrp />
        <NetRntlIncmReNotDebtFincdProp />
        <NetRentalIncomePersonalPropGrp />
        <OtherInvestmentIncmPartVIIGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>243</ExclusionAmt>
        </OtherInvestmentIncmPartVIIGrp>
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>9264172</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <NetIncomeLossFromSpecialEvtGrp />
        <GrossProfitLossSlsOfInvntryGrp />
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>10407140</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>10407140</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>MARK VADON</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>1201 WESTERN AVENUE 406</AddressLine1Txt>
          <CityNm>SEATTLE</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98101</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>2005561</TotalContributionsAmt>
        <PersonContributionInd>X</PersonContributionInd>
        <NoncashContributionInd>X</NoncashContributionInd>
      </ContributorInformationGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>15,650 SHARES GLIBA</NoncashPropertyDesc>
        <FairMarketValueAmt>1007547</FairMarketValueAmt>
        <ReceivedDt>2019-07-12</ReceivedDt>
      </NonCashPropertyContributionGrp>
      <NonCashPropertyContributionGrp>
        <ContributorNum>1</ContributorNum>
        <NoncashPropertyDesc>16,653 SHARES GLIBA</NoncashPropertyDesc>
        <FairMarketValueAmt>998014</FairMarketValueAmt>
        <ReceivedDt>2019-08-19</ReceivedDt>
      </NonCashPropertyContributionGrp>
    </IRS990ScheduleB>
    <DepreciationSchedule documentId="DepreciationSch" />
    <InvestmentsCorpBondsSchedule documentId="InvestCorpBondsSch">
      <InvestmentsCorporateBondsGrp>
        <BondNm>ST CORP BD-PORTFOLIO</BondNm>
        <EOYBookValueAmt>2729684</EOYBookValueAmt>
        <EOYFMVAmt>2729684</EOYFMVAmt>
      </InvestmentsCorporateBondsGrp>
      <InvestmentsCorporateBondsGrp>
        <BondNm>VANGUARD BD INDEX FD INC</BondNm>
        <EOYBookValueAmt>2175664</EOYBookValueAmt>
        <EOYFMVAmt>2175664</EOYFMVAmt>
      </InvestmentsCorporateBondsGrp>
      <InvestmentsCorporateBondsGrp>
        <BondNm>VANGURD INTER-TERM CORP BD ETF</BondNm>
        <EOYBookValueAmt>4451516</EOYBookValueAmt>
        <EOYFMVAmt>4451516</EOYFMVAmt>
      </InvestmentsCorporateBondsGrp>
    </InvestmentsCorpBondsSchedule>
    <InvestmentsCorpStockSchedule documentId="InvestCorpStockSch">
      <InvestmentsCorporateStockGrp>
        <StockNm>ALIBABA GROUP HLDG LTD</StockNm>
        <EOYBookValueAmt>409353</EOYBookValueAmt>
        <EOYFMVAmt>409353</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>GOOGLE INC</StockNm>
        <EOYBookValueAmt>155369</EOYBookValueAmt>
        <EOYFMVAmt>155369</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>GOOGLE INC</StockNm>
        <EOYBookValueAmt>68188</EOYBookValueAmt>
        <EOYFMVAmt>68188</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>APPLE INC SHARES</StockNm>
        <EOYBookValueAmt>869204</EOYBookValueAmt>
        <EOYFMVAmt>869204</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>BERKSHIRE HATHAWAY SHARES</StockNm>
        <EOYBookValueAmt>490826</EOYBookValueAmt>
        <EOYFMVAmt>490826</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>S&amp;P 500 PORTFOLIO</StockNm>
        <EOYBookValueAmt>15288874</EOYBookValueAmt>
        <EOYFMVAmt>15288874</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VANGUARD S&amp;P 500 ETF</StockNm>
        <EOYBookValueAmt>3097618</EOYBookValueAmt>
        <EOYFMVAmt>3097618</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VANGUARD SPECIALIZED DIV</StockNm>
        <EOYBookValueAmt>350544</EOYBookValueAmt>
        <EOYFMVAmt>350544</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VANGUARD SMALL-CAP</StockNm>
        <EOYBookValueAmt>27993</EOYBookValueAmt>
        <EOYFMVAmt>27993</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ISHARES MSCI EAFE INDEX FD</StockNm>
        <EOYBookValueAmt>543090</EOYBookValueAmt>
        <EOYFMVAmt>543090</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VANGUARD FTSE DEVELOPED MARKET</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>PARAMETRIC MSCI EAFE</StockNm>
        <EOYBookValueAmt>6980943</EOYBookValueAmt>
        <EOYFMVAmt>6980943</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ISHARES CORE MSCI EMERGING ETF</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VANGUARD FTSE EMERGING MARKETS</StockNm>
        <EOYBookValueAmt>2981269</EOYBookValueAmt>
        <EOYFMVAmt>2981269</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>GCI LIBERTY INC - CLASS A</StockNm>
        <EOYBookValueAmt>537468</EOYBookValueAmt>
        <EOYFMVAmt>537468</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ISHARES CORE S&amp;P SMALL-CAP ETF</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>SPDR S&amp;P 500ETF TRUST</StockNm>
        <EOYBookValueAmt>2304518</EOYBookValueAmt>
        <EOYFMVAmt>2304518</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ISHARES CORE MSCI EAFE ETF</StockNm>
        <EOYBookValueAmt>3653440</EOYBookValueAmt>
        <EOYFMVAmt>3653440</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>SCHWAB GOVT MONEY MARKET FUND</StockNm>
        <EOYBookValueAmt>67000</EOYBookValueAmt>
        <EOYFMVAmt>67000</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ALPHABET INC CLASS A</StockNm>
        <EOYBookValueAmt>6697</EOYBookValueAmt>
        <EOYFMVAmt>6697</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ALPHABET INC CLASS C</StockNm>
        <EOYBookValueAmt>85569</EOYBookValueAmt>
        <EOYFMVAmt>85569</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <OtherIncomeSchedule2 documentId="OtherIncomeSch2">
      <OtherIncomeDetail>
        <Desc>Other Income (Loss)</Desc>
        <RevenueAndExpensesPerBooksAmt>243</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>243</NetInvestmentIncomeAmt>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
  </ReturnData>
</Return>