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          <GrantOrContributionPurposeTxt>UNRESTRICTED</GrantOrContributionPurposeTxt>
          <Amt>5000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientPersonNm>MD ANDERSON CANCER CENTER</RecipientPersonNm>
          <RecipientUSAddress>
            <AddressLine1Txt>1515 HOLCOMBE BLVD</AddressLine1Txt>
            <CityNm>HOUSTON</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>770304009</ZIPCd>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>NONE</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>RESEARCH</GrantOrContributionPurposeTxt>
          <Amt>20000</Amt>
        </GrantOrContributionPdDurYrGrp>
        <GrantOrContributionPdDurYrGrp>
          <RecipientPersonNm>UTAH TECH UNIVERSITY</RecipientPersonNm>
          <RecipientUSAddress>
            <AddressLine1Txt>225 SOUTH UNIVERSITY AVENUE</AddressLine1Txt>
            <CityNm>SAINT GEORGE</CityNm>
            <StateAbbreviationCd>UT</StateAbbreviationCd>
            <ZIPCd>84770</ZIPCd>
          </RecipientUSAddress>
          <RecipientRelationshipTxt>NONE</RecipientRelationshipTxt>
          <RecipientFoundationStatusTxt>GOV</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>SCHOLARSHIPS FOR UPPER DIVISION SCIENCE STUDENTS</GrantOrContributionPurposeTxt>
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        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>106000</TotalGrantOrContriPdDurYrAmt>
        <TotalGrantOrContriApprvFutAmt>0</TotalGrantOrContriApprvFutAmt>
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        </IntOnSavAndTempCashInvstGrp>
        <DividendsAndInterestFromSecDtl>
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          <ExclusionAmt>25480</ExclusionAmt>
        </DividendsAndInterestFromSecDtl>
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          <ExclusionAmt>111</ExclusionAmt>
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        <GainSalesAstOthThanInvntryGrp>
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        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>51182</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>51182</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>
    <InvestmentsCorpStockSchedule documentId="STM137">
      <InvestmentsCorporateStockGrp>
        <StockNm>BIO PATH HOLDINGS</StockNm>
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        <EOYFMVAmt>185</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>APPLE</StockNm>
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        <EOYFMVAmt>253050</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>BERKSHIRE HATHAWAY</StockNm>
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        <EOYFMVAmt>734873</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>CSX</StockNm>
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        <EOYFMVAmt>56910</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>AUTOZONE</StockNm>
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        <EOYFMVAmt>24048</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>CONAGRA BRANDS</StockNm>
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        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>CUMMINS</StockNm>
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        <EOYFMVAmt>55871</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>FNMA</StockNm>
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        <EOYFMVAmt>833</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>MID-AMERICA APARTMENTS REIT</StockNm>
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        <EOYFMVAmt>76162</EOYFMVAmt>
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      <InvestmentsCorporateStockGrp>
        <StockNm>QUALCOMM</StockNm>
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        <EOYFMVAmt>122129</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>IONIQ SCIENCES FKA PROLUNG</StockNm>
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        <EOYFMVAmt>35000</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>ADP</StockNm>
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        <EOYFMVAmt>39579</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>CATERPILLAR</StockNm>
        <EOYBookValueAmt>12011</EOYBookValueAmt>
        <EOYFMVAmt>49426</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>UNILEVER</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>HOME DEPOT</StockNm>
        <EOYBookValueAmt>30009</EOYBookValueAmt>
        <EOYFMVAmt>83734</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>BOEING COMPANY</StockNm>
        <EOYBookValueAmt>13880</EOYBookValueAmt>
        <EOYFMVAmt>20372</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>LOCKHEED MARTIN CORPORATION</StockNm>
        <EOYBookValueAmt>17210</EOYBookValueAmt>
        <EOYFMVAmt>33831</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>MICROSOFT CORPORATION</StockNm>
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        <EOYFMVAmt>326776</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>NASDAQ</StockNm>
        <EOYBookValueAmt>21421</EOYBookValueAmt>
        <EOYFMVAmt>70643</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>NORTHERN TR CORPORATION</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>J &amp; J</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>LAMB WESTON HLDGS</StockNm>
        <EOYBookValueAmt>15364</EOYBookValueAmt>
        <EOYFMVAmt>43235</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>MONOLITHIC POWER</StockNm>
        <EOYBookValueAmt>20034</EOYBookValueAmt>
        <EOYFMVAmt>172810</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>PACKAGING CORPORATION OF AMERI</StockNm>
        <EOYBookValueAmt>9993</EOYBookValueAmt>
        <EOYFMVAmt>21018</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>PHILLIPS 66</StockNm>
        <EOYBookValueAmt>19972</EOYBookValueAmt>
        <EOYFMVAmt>32350</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>UNITED HEALTH GROUP</StockNm>
        <EOYBookValueAmt>19882</EOYBookValueAmt>
        <EOYFMVAmt>61700</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>VIRTU FINANCIAL</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>BROOKFIELD INFRASTRUCTURE</StockNm>
        <EOYBookValueAmt>18117</EOYBookValueAmt>
        <EOYFMVAmt>26316</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>EATON</StockNm>
        <EOYBookValueAmt>9737</EOYBookValueAmt>
        <EOYFMVAmt>48263</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>FIDELITY SELECT ENERGY FUND</StockNm>
        <EOYBookValueAmt>0</EOYBookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
      <InvestmentsCorporateStockGrp>
        <StockNm>BROOKFIED INFRASTRUCTURE</StockNm>
        <EOYBookValueAmt>1911</EOYBookValueAmt>
        <EOYFMVAmt>3383</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <InvestmentsGovtObligationsSch documentId="STM136">
      <USGovtObligationsBookVlEOYAmt>10</USGovtObligationsBookVlEOYAmt>
      <USGovtObligationsEOYFMVAmt>8</USGovtObligationsEOYFMVAmt>
    </InvestmentsGovtObligationsSch>
    <InvestmentsOtherSchedule2 documentId="STM118">
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>GS PROPERTY INVESTMENTS LLC</CategoryOrItemTxt>
        <BookValueAmt>0</BookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>FS HOUSTON PROJECTS LLC</CategoryOrItemTxt>
        <BookValueAmt>0</BookValueAmt>
        <EOYFMVAmt>0</EOYFMVAmt>
      </InvestmentsOtherGrp>
    </InvestmentsOtherSchedule2>
    <LegalFeesSchedule documentId="STM107">
      <LegalFeesGrp>
        <CategoryTxt>FEES RELATED TO TAX COMPLIANCE</CategoryTxt>
        <LegalFeesAmt>3772</LegalFeesAmt>
        <NetInvestmentIncomeAmt>3772</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </LegalFeesGrp>
      <LegalFeesGrp>
        <CategoryTxt>FEES RELATED TO REAL ESTATE</CategoryTxt>
        <LegalFeesAmt>6969</LegalFeesAmt>
        <NetInvestmentIncomeAmt>6969</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </LegalFeesGrp>
    </LegalFeesSchedule>
    <OtherDecreasesSchedule documentId="STM116">
      <OtherDecreasesDetail>
        <Desc>BOOKCAP ACCT DIFF FR PARTNERSHIPS</Desc>
        <Amt>4316</Amt>
      </OtherDecreasesDetail>
    </OtherDecreasesSchedule>
    <OtherExpensesSchedule documentId="STM103">
      <OtherExpensesScheduleGrp>
        <Desc>DIRECTOR EXPENSE REIMBURSEMENT</Desc>
        <RevenueAndExpensesPerBooksAmt>0</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>STATE REGISTRATION FEES</Desc>
        <RevenueAndExpensesPerBooksAmt>80</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>80</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherIncomeSchedule2 documentId="STM106">
      <OtherIncomeDetail>
        <Desc>DISTRIBUTION FROM PARTNERSHIPS</Desc>
        <RevenueAndExpensesPerBooksAmt>1414</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>1414</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
    <OtherProfessionalFeesSchedule documentId="STM109">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>BROKERAGE AND CONSULTING FEES</CategoryTxt>
        <Amt>10034</Amt>
        <NetInvestmentIncomeAmt>10034</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="STM110">
      <TaxesDetail>
        <CategoryTxt>INTERNAL REVENUE SERVICE</CategoryTxt>
        <Amt>245</Amt>
        <NetInvestmentIncomeAmt>245</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </TaxesDetail>
      <TaxesDetail>
        <CategoryTxt>FOREIGN DIVIDEND TAX</CategoryTxt>
        <Amt>38</Amt>
        <NetInvestmentIncomeAmt>38</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>0</DisbursementsCharitablePrpsAmt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>