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      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL NACHBAR</PersonNm>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>GURDEEP PALL</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>EDUARDO PENALVER</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KEITH TRAVERSE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BRANDON VAUGHAN</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DAVID VICTOR</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ANNA WHITE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BIRAGE TANDON</PersonNm>
        <TitleTxt>ASST. HEAD OF SCHOOL/CFO</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>419091</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>36085</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SUE BELCHER</PersonNm>
        <TitleTxt>HEAD OF DOWNTOWN SCHOOL</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>264835</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>44798</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>RYAN BOCCUZZI</PersonNm>
        <TitleTxt>UPPER SCHOOL DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromOrgAmt>266508</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>42889</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DAIGA GALINS</PersonNm>
        <TitleTxt>DIRECTOR OF DEVELOPMENT</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <OtherCompensationAmt>55288</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>REEM ABU RAHMEH</PersonNm>
        <TitleTxt>MIDDLE SCHOOL DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <OtherCompensationAmt>22603</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JAMIE ASAKA</PersonNm>
        <TitleTxt>DIRECTOR OF STUDENT SUPPORT</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WELLESLEY WILSON</PersonNm>
        <TitleTxt>DIRECTOR OF ADMISSIONS</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <OtherCompensationAmt>24482</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JAMIE BRITTO</PersonNm>
        <TitleTxt>DIRECTOR OF TECHNOLOGY</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CHRISTOPHER HARTLEY</PersonNm>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ARI WORTHMAN</PersonNm>
        <TitleTxt>DIRECTOR OF COLLEGE COUNSELING</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>25495</OtherCompensationAmt>
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      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
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      <IndivRcvdGreaterThan100KCnt>95</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>LMN ARCHITECTS LLP</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>801 2ND AVE STE 501</AddressLine1Txt>
            <CityNm>SEATTLE</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98104</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>ARCHITECTURAL SERVICES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>KNOWING TECHNOLOGIES LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>660 PRICE AVE STE C</AddressLine1Txt>
            <CityNm>REDWOOD CITY</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94063</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>TECHNOLOGY SERVICES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SENECA GROUP INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1191 2ND AVE UNIT 1500</AddressLine1Txt>
            <CityNm>SEATTLE</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98101</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>BUILDING PROJECT MANAGEMENT SERVICES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>DURABLE CAPITAL ONSHORE FUND LP</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>4747 BETHESDA AVENUE 1002</AddressLine1Txt>
            <CityNm>BETHESDA</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20814</ZIPCd>
          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CAMBRIDGE ASSOCIATES</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>115 FEDERAL STREET SUITE 2600</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02110</ZIPCd>
          </USAddress>
        </ContractorAddress>
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      <TotalContributionsAmt>19587206</TotalContributionsAmt>
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        <BusinessCd>611600</BusinessCd>
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      <ProgramServiceRevenueGrp>
        <Desc>AUXILIARY SERVICES</Desc>
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        <ExclusionAmt>5966989</ExclusionAmt>
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      <GrossRentsGrp>
        <RealAmt>449033</RealAmt>
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      <LessRentalExpensesGrp>
        <RealAmt>0</RealAmt>
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      <RentalIncomeOrLossGrp>
        <RealAmt>449033</RealAmt>
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        <TotalRevenueColumnAmt>449033</TotalRevenueColumnAmt>
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        <OtherAmt>1446710</OtherAmt>
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        <SecuritiesAmt>40697257</SecuritiesAmt>
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        <TotalRevenueColumnAmt>8343522</TotalRevenueColumnAmt>
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        <Desc>REFUNDS/REBATES</Desc>
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        <ExclusionAmt>19555</ExclusionAmt>
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      <OtherRevenueMiscGrp>
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        <ManagementAndGeneralAmt>66392</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>2064605</ManagementAndGeneralAmt>
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        <FundraisingAmt>8315</FundraisingAmt>
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        <ProgramServicesAmt>25986</ProgramServicesAmt>
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        <ProgramServicesAmt>2345118</ProgramServicesAmt>
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        <ProgramServicesAmt>645257</ProgramServicesAmt>
        <ManagementAndGeneralAmt>172231</ManagementAndGeneralAmt>
        <FundraisingAmt>7216</FundraisingAmt>
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        <ProgramServicesAmt>2459491</ProgramServicesAmt>
        <ManagementAndGeneralAmt>94158</ManagementAndGeneralAmt>
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        <TotalAmt>1355608</TotalAmt>
        <ProgramServicesAmt>1301910</ProgramServicesAmt>
        <ManagementAndGeneralAmt>53072</ManagementAndGeneralAmt>
        <FundraisingAmt>626</FundraisingAmt>
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        <ProgramServicesAmt>124168</ProgramServicesAmt>
        <ManagementAndGeneralAmt>19556</ManagementAndGeneralAmt>
        <FundraisingAmt>2165</FundraisingAmt>
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        <ProgramServicesAmt>2510116</ProgramServicesAmt>
        <ManagementAndGeneralAmt>78441</ManagementAndGeneralAmt>
        <FundraisingAmt>26147</FundraisingAmt>
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        <ProgramServicesAmt>306685</ProgramServicesAmt>
        <ManagementAndGeneralAmt>94792</ManagementAndGeneralAmt>
        <FundraisingAmt>2473</FundraisingAmt>
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        <TotalAmt>451511</TotalAmt>
        <ProgramServicesAmt>262676</ProgramServicesAmt>
        <ManagementAndGeneralAmt>178514</ManagementAndGeneralAmt>
        <FundraisingAmt>10321</FundraisingAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>54564</ProgramServicesAmt>
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        <Desc>TAXES</Desc>
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        <ManagementAndGeneralAmt>2198</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
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        <ManagementAndGeneralAmt>17211</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>48405843</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8885417</ManagementAndGeneralAmt>
        <FundraisingAmt>1418634</FundraisingAmt>
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        <EOYAmt>2891297</EOYAmt>
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        <EOYAmt>75630124</EOYAmt>
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        <ExplanationTxt>LAKESIDE'S AGENCY FUNDS REPRESENT A VARIETY OF ACCOUNTS THAT THE SCHOOL MAINTAINS FOR STUDENT GROUPS AND PROGRAMS. THE FUNDS ARE GENERALLY MAINTAINED BY THE SCHOOL AND THE TREASURER/ADMINISTRATOR OF THE ORGANIZATION/CLUB DEPOSITS AND WITHDRAWS FUNDS FROM LAKESIDE AS NEEDED.</ExplanationTxt>
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        <ExplanationTxt>THE SCHOOL'S NONDISCRIMINATORY POLICY IS ON THE WEBSITE AND PART OF THE STATEMENT OF COMMUNITY EXPECTATIONS THAT ALL COMMUNITY MEMBERS MUST ASSERT THAT THEY HAVE READ AND ACKNOWLEDGED EACH YEAR AS PART OF THE ENROLLMENT/RE-ENROLLMENT PROCESS (FOR STUDENTS AND FAMILIES) AND EMPLOYMENT CONTRACT RENEWALS (FOR EMPLOYEES).</ExplanationTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>RYAN BOCCUZZI</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>DAIGA GALINS</PersonNm>
        <TitleTxt>DIRECTOR OF DEVELOPMENT</TitleTxt>
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        <OtherCompensationFilingOrgAmt>5866</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>17562</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>37726</NontaxableBenefitsFilingOrgAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMIE ASAKA</PersonNm>
        <TitleTxt>DIRECTOR OF STUDENT SUPPORT</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>11012</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12785</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>42280</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>232624</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>WELLESLEY WILSON</PersonNm>
        <TitleTxt>DIRECTOR OF ADMISSIONS</TitleTxt>
        <BaseCompensationFilingOrgAmt>199369</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>3281</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13972</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10510</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>227329</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>REEM ABU RAHMEH</PersonNm>
        <TitleTxt>MIDDLE SCHOOL DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>199594</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>8631</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>224173</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMIE BRITTO</PersonNm>
        <TitleTxt>DIRECTOR OF TECHNOLOGY</TitleTxt>
        <BaseCompensationFilingOrgAmt>182986</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>10602</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CHRISTOPHER HARTLEY</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>1836</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12844</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ARI WORTHMAN</PersonNm>
        <TitleTxt>DIRECTOR OF COLLEGE COUNSELING</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>217</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>840</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>12635</NontaxableBenefitsFilingOrgAmt>
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        <TotalCompensationFilingOrgAmt>207921</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE HEAD OF SCHOOL ELECTS FIRST CLASS TRAVEL WHILE TRAVELING ON BEHALF OF THE SCHOOL FOR HEALTH-RELATED REASONS AND BETTER PERFORMANCE. HEAD OF SCHOOL, UPPER SCHOOL DIRECTOR AND DIRECTOR OF TECHNOLOGY ALL LIVE IN RENTAL HOMES OWNED BY LAKESIDE SCHOOL. FOR THE HEAD OF SCHOOL AND UPPER SCHOOL DIRECTOR, THE FULL MARKET VALUE OF THE HOUSING IS TREATED AS IMPUTED INCOME. FOR THE OTHER EMPLOYEES IDENTIFIED, THEY PAY A BELOW-MARKET RATE RENT MONTHLY AND THE DIFFERENCE BETWEEN RENT PAID AND THE MARKET VALUE IS TREATED AS IMPUTED INCOME.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>KAI BYNUM, HEAD OF SCHOOL, BIRAGE TANDON, ASST HEAD OF SCHOOL/CFO, DAIGA GALINS, DIRECTOR OF DEVELOPMENT, SUE BELCHER, HEAD OF DOWNTOWN SCHOOL, RYAN BOCCUZZI, UPPER SCHOOL DIRECTOR, REEM ABU RAHMEH, MIDDLE SCHOOL DIRECTOR, WELLESLEY WILSON, DIRECTOR OF ADMISSIONS, JAMIE BRITTO, DIRECTOR OF TECHNOLOGY, ARI WORTHMAN, DIRECTOR OF COLLEGE COUNSELING, CHRISTOPHER HARTLEY, DIRECTOR OF ATHLETICS, AND JAMIE ASAKA, DIRECTOR OF STUDENT SUPPORT, ALL RECEIVED A BONUS DURING THE YEAR THAT WAS SUBJECT TO THE DISCRETION OF THE BOARD BUT CAPPED AT A FIXED AMOUNT.</ExplanationTxt>
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        <RelationshipWithOrgTxt>N/A</RelationshipWithOrgTxt>
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        <AssistancePurposeTxt>FINANCIAL AID</AssistancePurposeTxt>
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        <ContributionCnt>50</ContributionCnt>
        <NoncashContributionsRptF990Amt>755543</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
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      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMOUNT IN COLUMN (B) REPRESENTS THE NUMBER OF ITEMS RECEIVED FROM DONORS DURING THE YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART I, LINE 6:</FormAndLineReferenceDesc>
        <ExplanationTxt>VOLUNTEERS PROVIDE SUPPORT ACROSS MANY AREAS OF THE SCHOOL, SUCH AS THE VOLUNTEER BOARD OF TRUSTEES, FUNDRAISING COMMITTEES, EXTRACURRICULAR STUDENT ACTIVITIES, PARENTS AND GUARDIANS ASSOCIATION (PGA) ACTIVITIES, AND MORE. FOR THE 2023-2024 FISCAL YEAR WE HAD APPROXIMATELY 220 VOLUNTEERS, WHO INCLUDED SCHOOL BOARD MEMBERS, PGA BOARD MEMBERS, COMMITTEE CHAIRS, LEADERSHIP ROLES, ROAR AUCTION VOLUNTEERS, ETC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART V, LINE 3B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990-T WILL BE FILED AFTER FORM 990. LAKESIDE SCHOOL IS INVESTED IN MANY PASS-THROUGH INVESTMENTS THAT GENERATE SCHEDULE K-1S. THE FORM 990-T WILL BE PREPARED ONCE ALL THE K-1S ARE RECEIVED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSETS MANAGEMENT COMMITTEE OF THE BOARD IS RESPONSIBLE FOR OVERSEEING THE SCHOOL'S FINANCES. THIS COMMITTEE REVIEWS A PUBLIC DISCLOSURE COPY OF THE FORM 990 WITH THE EXTERNAL TAX PREPARER AND THEN VOTES TO ACCEPT IT EACH YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL TRUSTEES, OFFICERS AND KEY EMPLOYEES COMPLETE AND SIGN A DOCUMENT ASSERTING THEY HAVE READ AND UNDERSTOOD THE POLICY, DISCLOSING CONFLICTS, IF ANY, AND CONFIRMING THEIR COMPLIANCE WITH THE POLICY. A COMMITTEE OF THE BOARD REVIEWS THE ANNUAL WRITTEN STATEMENTS. THE SAME COMMITTEE RESPONDS TO ANY INDICATION OF NON-COMPLIANCE. IF THERE IS CONFLICT OF INTEREST, THE INDIVIDUAL IS EXCUSED FROM VOTING ON THE ISSUE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CURRENT HEAD OF SCHOOL WAS APPOINTED ON A 5-YEAR CONTRACT BEGINNING JULY 5, 2022. COMPENSATION INCLUDES ANNUAL BASE PAY, ANNUAL BONUS, SIGNING BONUS THAT VESTS OVER THE TERM OF THE CONTRACT, AND OTHER BENEFITS BASED ON NATIONAL AND GLOBAL COMPENSATION BENCHMARKING DONE BY THE EXECUTIVE SEARCH FIRM, SPENCER STUART. COMPENSATION FOR OFFICERS AND KEY EMPLOYEES IS BENCHMARKED AGAINST NATIONAL PEER SCHOOLS USING THE ANNUALLY AVAILABLE NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS (NAIS) DATA ANALYSIS FOR SCHOOL LEADERSHIP (DASL) SURVEY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AND REQUIRE PRIOR APPROVAL TO BE SHARED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN VALUE OF TRUSTS 90,104.</ExplanationTxt>
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      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
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      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>1</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>