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        <CurrentTaxYearMinus4YearsAmt>52008</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>105576</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>108744</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>112006</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>115366</CurrentTaxYearAmt>
        <TotalAmt>493700</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>1016450</TotalSupportAmt>
      <PublicSupportCY170Pct>0.51430</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.65630</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LandGrp>
        <InvestmentCostOrOtherBasisAmt>423765</InvestmentCostOrOtherBasisAmt>
        <BookValueAmt>423765</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <InvestmentCostOrOtherBasisAmt>1511235</InvestmentCostOrOtherBasisAmt>
        <DepreciationAmt>458750</DepreciationAmt>
        <BookValueAmt>1052485</BookValueAmt>
      </BuildingsGrp>
      <TotalBookValueLandBuildingsAmt>1476250</TotalBookValueLandBuildingsAmt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PART XIII</FormAndLineReferenceDesc>
        <ExplanationTxt>FIN 48 FOOTNOTE: ON JANUARY 1, 2009, THE FOUNDATION ADOPTED THE RECOGNITION REQUIREMENTS FOR UNCERTAIN INCOME TAX PROVISIONS AS REQUIRED BY GENERALLY ACCEPTED ACCOUNTING PRINCIPLES, WITH NO CUMULATIVE EFFECT ADJUSTMENT REQUIRED. INCOME TAX BENEFITS ARE RECOGNIZED FOR INCOME TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN, ONLY WHEN IT IS DETERMINED THAT THE INCOME TAX POSITION WILL MORE-LIKELY-THAN-NOT BE SUSTAINED UPON EXAMINATION BY TAXING AUTHORITIES. THE FOUNDATION HAS ANALYZED THE TAX POSITIONS TAKEN IN ITS FILINGS WITH THE IRS AND STATE JURISDICTIONS WHERE IT OPERATES. THE FOUNDATION BELIEVES THAT ITS INCOME TAX FILING POSITIONS WILL BE SUSTAINED UPON EXAMINATION AND DOES NOT ANTICIPATE ANY ADJUSTMENTS THAT WOULD RESULT IN A MATERIAL ADVERSE AFFECT ON THE FOUNDATION'S FINANCIAL CONDITION, RESULTS OF OPERATIONS OR CASH FLOWS. ACCORDINGLY, THE FOUNDATION HAS NOT RECORDED ANY RESERVES, OR RELATED ACCRUALS FOR INTEREST AND PENALTIES FOR UNCERTAIN INCOME TAX POSITIONS AT DECEMBER 31, 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>0</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>SOUTH KOREA</RegionTxt>
        <TypeOfActivitiesConductedTxt>THE FOUNDATION DONATED TO KAIST DEVELOPMENT FOUNDATION (KOREA) AS A PROGRAM SERVICE.</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>NUCLEAR NONPROLIFERATION NUCLEAR SECURITY LAB DEVELOPMENT FUND</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>20000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>20000</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>20000</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>SOUTH KOREA</RegionTxt>
        <PurposeOfGrantTxt>THE FOUNDATION DONATED TO KAIST DEVELOPMENT FOUNDATION (KOREA) AS A PROGRAM SERVICE FOR THE PURPOSE OF NUCLEAR NONPROLIFERATION NUCLEAR SECURITY LAB DEVELOPMENT FUND.</PurposeOfGrantTxt>
        <CashGrantAmt>20000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE THROUGH FINANCIAL INSTITUTION</MannerOfCashDisbursementTxt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </GrantsToOrgOutsideUSGrp>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CHAIRMAN AND A BOARD MEMBER REVIEW AND FOLLOW UP ON THE GRANTS DISBURSED TO THE BENEFICIARIES TO ENSURE THAT RESTRICTED FUNDS WERE PROPERLY USED BY KAIST DEVELOPMENT FOUNDATION (KOREA).</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TAX RETURN IS PRESENTED TO GOVERNING BODY OF THE ORGANIZATION BEFORE FILING FOR APPROVAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS/CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE UPON REQUEST. THE GOVERNING BOARD REQUIRES ALL BOARD MEMBERS TO FILE AN ANNUAL STATEMENT OF COMPLIANCE WITH THE ORGAIZATION'S POLICIES. ADDITIONALY, THE ORGANIZATION MONITORS THE STATUS OF BOARD OF DIRECTOR MEMBERS FOR ANY CONFLICT OF INTEREST EXISTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAINTAINS BOARD OF DIRECTORS MEETING MINUTES AS WELL THE SIGNATURE OF ALL BOARD MEMBERS. THE ORGANIZATION MAKES ITS FINANCIAL STATEMENTS AVAILABLE FOR PUBLIC INSPECTION UPON REQUEST. THE ORGANIZATION HAS A WRITTEN CONFLICT OF INTEREST POLICY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS A COMMITTEE THAT OVERSEES FINANCIAL STATEMENTS REVIEW. THERE WERE CHANGES IN THE COMMITTEE IN FISCAL YEAR 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>