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      <Form990PartVIISectionAGrp>
        <PersonNm>MS BRIT D'ARBELOFF</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MR JONATHAN GOLDSTEIN</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MR PETER WHITEHEAD</PersonNm>
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        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR ROBERT SATCHER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR PAUL JOSKOW</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MS SARAH WILLIAMSON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR DENNIS LANGER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MR SETH ALEXANDER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR KEVIN CHURCHWELL</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MR MICHAEL CHAMBERS</PersonNm>
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        <PersonNm>MR TERRANCE MCGUIRE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MR RAJA BOBBILI</PersonNm>
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        <PersonNm>DR SALLY KORNBLUTH</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DR DEBORAH DUNSIRE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MS MICHO SPRING</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MS MAREN WINNICK</PersonNm>
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          <USAddress>
            <AddressLine1Txt>170 N RADNOR CHESTER RD 300</AddressLine1Txt>
            <CityNm>RADNOR</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
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          <USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>HINCKLEY ALLEN SNYDER LLP</PersonNm>
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          <USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>NX2 SERVICES LLC</PersonNm>
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          <USAddress>
            <AddressLine1Txt>PO BOX 541053</AddressLine1Txt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <PersonNm>MORSE BARNES-BROWN PENDLETON PC</PersonNm>
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          <USAddress>
            <AddressLine1Txt>230 3RD AVE4TH FLOOR</AddressLine1Txt>
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            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02451</ZIPCd>
          </USAddress>
        </ContractorAddress>
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        <BusinessCd>541900</BusinessCd>
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      <ProgramServiceRevenueGrp>
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        <BusinessCd>541700</BusinessCd>
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        <PersonalAmt>0</PersonalAmt>
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      <GrossAmountSalesAssetsGrp>
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      <NetGainOrLossInvestmentsGrp>
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        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>279792</TotalRevenueColumnAmt>
        <ExclusionAmt>279792</ExclusionAmt>
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      <OtherRevenueMiscGrp>
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        <BusinessCd>900099</BusinessCd>
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        <ProgramServicesAmt>479997</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>129852</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>1189805</ProgramServicesAmt>
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        <FundraisingAmt>13025</FundraisingAmt>
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        <ManagementAndGeneralAmt>456160</ManagementAndGeneralAmt>
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      <FeesForServicesProfFundraising>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ProgramServicesAmt>1508</ProgramServicesAmt>
        <FundraisingAmt>1480</FundraisingAmt>
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        <FundraisingAmt>19798</FundraisingAmt>
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        <ProgramServicesAmt>67161</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1759593</ManagementAndGeneralAmt>
        <FundraisingAmt>27563</FundraisingAmt>
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        <ProgramServicesAmt>65865940</ProgramServicesAmt>
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        <ProgramServicesAmt>2233046</ProgramServicesAmt>
        <ManagementAndGeneralAmt>327194</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>370870</ProgramServicesAmt>
        <ManagementAndGeneralAmt>77735</ManagementAndGeneralAmt>
        <FundraisingAmt>22132</FundraisingAmt>
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      <PymtTravelEntrtnmntPubOfclGrp>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>595034</ProgramServicesAmt>
        <ManagementAndGeneralAmt>239988</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>3214575</ProgramServicesAmt>
        <ManagementAndGeneralAmt>447924</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>5010839</ProgramServicesAmt>
        <ManagementAndGeneralAmt>682936</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>377284</ProgramServicesAmt>
        <ManagementAndGeneralAmt>29321</ManagementAndGeneralAmt>
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        <TotalAmt>10289829</TotalAmt>
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        <MannerOfCashDisbursementTxt>WIRE</MannerOfCashDisbursementTxt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <DescriptionOfNonCashAsstTxt>N/A</DescriptionOfNonCashAsstTxt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>true</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE F, PART I, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANT FUNDS ARE MANAGED IN ACCORDANCE WITH THE INSTITUTE'S RULES AND REGULATIONS. EXPENDITURES ARE REVIEWED TO ENSURE THAT THE COSTS INCURRED AND CHARGED TO A PARTICULAR GRANT ARE IN COMPLIANCE WITH THE INSTITUTE'S POLICIES AND GRANTOR REQUIREMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
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          <BusinessNameLine1Txt>UNIVERSITY OF PENNSLYVANIA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3451 WALNUT STREET</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19104</ZIPCd>
        </USAddress>
        <RecipientEIN>231352685</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
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        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARDS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MEMORIAL SLOAN KETTERING</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 26338</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10087</ZIPCd>
        </USAddress>
        <RecipientEIN>131924236</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>185312</CashGrantAmt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARDS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BRIGHAM AND WOMENS HOSPITAL</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 3887</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>022413887</ZIPCd>
        </USAddress>
        <RecipientEIN>042312909</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>215931</CashGrantAmt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARDS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>COLUMBIA UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 2978</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>100879789</ZIPCd>
        </USAddress>
        <RecipientEIN>135598093</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>312383</CashGrantAmt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARDS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>PRINCETON UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>701 Carnegie Ctr</AddressLine1Txt>
          <CityNm>Princeton</CityNm>
          <StateAbbreviationCd>NJ</StateAbbreviationCd>
          <ZIPCd>08540</ZIPCd>
        </USAddress>
        <RecipientEIN>210634501</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>333938</CashGrantAmt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARD</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>HARVARD UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 415649</AddressLine1Txt>
          <CityNm>CAMBRIDGE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>022415649</ZIPCd>
        </USAddress>
        <RecipientEIN>042103580</RecipientEIN>
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        <CashGrantAmt>592946</CashGrantAmt>
        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARD</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE BROAD INSTITUTE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>415 MAIN ST</AddressLine1Txt>
          <CityNm>CAMBRIDGE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02142</ZIPCd>
        </USAddress>
        <RecipientEIN>263428781</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
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        <ValuationMethodUsedDesc>N/A</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARD</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DANA FARBER CANCER INSTITUTE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
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          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02215</ZIPCd>
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        <NonCashAssistanceDesc>N/A</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>RESEARCH SUBAWARD</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
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        </RecipientBusinessName>
        <USAddress>
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          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <RecipientEIN>042774441</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
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        <PurposeOfGrantTxt>RESEARCH SUBAWARD</PurposeOfGrantTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>GRANT FUNDS ARE MANAGED IN ACCORDANCE WITH THE INSTITUTE'S RULES AND REGULATIONS. EXPENDITURES ARE REVIEWED TO ENSURE THAT THE COSTS INCURRED AND CHARGED TO A PARTICULAR GRANT ARE IN COMPLIANCE WITH THE INSTITUTE'S POLICIES AND GRANTOR REQUIREMENTS.</ExplanationTxt>
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    </IRS990ScheduleI>
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      <IdemnificationGrossUpPmtsInd>X</IdemnificationGrossUpPmtsInd>
      <WrittenPolicyRefTAndEExpnssInd>true</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>true</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>true</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>true</InitialContractExceptionInd>
      <RebuttablePresumptionProcInd>true</RebuttablePresumptionProcInd>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINES 1A &amp; 1B:</FormAndLineReferenceDesc>
        <ExplanationTxt>TRAVEL FOR COMPANIONS INCLUDED TRAVEL EXPENSES PAID FOR FAMILY MEMBERS TO ATTEND AN ANNUAL BUSINESS RETREAT. THESE PAYMENTS WERE GROSSED UP FOR INDIVIDUAL TAX REPORTING PURPOSES. THE PAYMENTS AND THE GROSS UP AMOUNT WERE TREATED AS TAXABLE INCOME.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>WHITEHEAD INSTITUTE HAS A BOARD LEADERSHIP ADVISORY COMMITTEE, WHICH HAS A CHARTER. IN ADDITION, WHITEHEAD HAS AN EXECUTIVE COMPENSATION POLICY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 7 &amp; PART II, COLUMN (B)(II):</FormAndLineReferenceDesc>
        <ExplanationTxt>BONUS PAYMENTS REPORTED IN COLUMN B(II) REPRESENT NON-FIXED PAYMENTS MADE IN RECOGNITION OF MEETING CERTAIN PERFORMANCE GOALS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 8:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PRESIDENT RECEIVED PAYMENTS UNDER AN INITIAL CONTRACT WITH THE INSTITUTE.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="IRS990ScheduleL">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>RUTH LEHMANN</PersonNm>
        <RelationshipWithOrgTxt>DIRECTOR/PRESIDENT</RelationshipWithOrgTxt>
        <LoanPurposeTxt>MORTGAGE</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>1500000</OriginalPrincipalAmt>
        <BalanceDueAmt>900000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>900000</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp />
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp />
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>2</ContributionCnt>
        <NoncashContributionsRptF990Amt>975871</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>SALE PROCEEDS AT FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp />
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE M, COLUMN B:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE IS REPORTING THE NUMBER OF CONTRIBUTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART I, LINE 6:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE DOES NOT FORMALLY TRACK VOLUNTEERS, BUT HAS INCLUDED THE NUMBER OF BOARD MEMBERS THAT ARE UNCOMPENSATED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>PETER AND SUSAN WHITEHEAD (DIRECTORS) HAVE A FAMILY RELATIONSHIP AND A BUSINESS RELATIONSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 11B:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS FOR THE FORM 990 INCLUDES REVIEW BY SENIOR MANAGEMENT AND THE INDEPENDENT EXTERNAL TAX CONSULTANTS. THE FULL BOARD, INCLUDING THE AUDIT &amp; RISK COMMITTEE RECEIVES A FINAL COPY OF THE FORM 990 BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 12C:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROMPTLY AFTER THE END OF EACH FISCAL YEAR OF THE INSTITUTE (JUNE 30), AND IMMEDIATELY FOLLOWING ELECTION TO THE BOARD, OR AS AN OFFICER, FOR THE FIRST TIME, DIRECTORS AND OFFICERS SHALL SUBMIT TO THE SECRETARY, OR SUCH PERSON AS THE DIRECTOR MAY DESIGNATE, A COMPLETED DISCLOSURE STATEMENT REPORTING INFORMATION SPECIFICALLY REQUESTED IN THE STATEMENT AND ALSO REPORTING ON BEHALF OF THEMSELVES, THEIR FAMILY MEMBERS, AND ORGANIZATIONS WITH WHICH THEY HAVE A BUSINESS RELATIONSHIP, ANY ACTUAL OR PLANNED BUSINESS OR OTHER TRANSACTION OR RELATIONSHIP THAT DIRECTLY OR INDIRECTLY INVOLVES THE INSTITUTE OR THAT FOR SOME OTHER REASON COULD BE CONSTRUED AS A CONFLICT OF INTEREST BECAUSE IT MIGHT AFFECT THEIR INDEPENDENT, UNBIASED JUDGMENT WHEN CARRYING OUT THEIR DUTIES FOR THE INSTITUTE. IF A MATTER COMES BEFORE THE BOARD OR ANY COMMITTEE OF THE BOARD IN WHICH A DIRECTOR HAS AN INTEREST (EITHER DIRECTLY OR INDIRECTLY), SUCH DIRECTOR SHOULD WITHDRAW FROM DISCUSSION AND VOTING WHEN THE BOARD OR COMMITTEE ACTS ON SUCH MATTER. CONFLICTS OF INTEREST ARE MONITORED BY THE VICE PRESIDENT AND DIRECTOR WHO ADVISE THE CHAIRMAN OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 15:</FormAndLineReferenceDesc>
        <ExplanationTxt>A LEADERSHIP ADVISORY COMMITTEE OF THE BOARD OF DIRECTORS ANNUALLY REVIEWS AND RECOMMENDS CHANGES TO THE COMPENSATION FOR THE PRESIDENT, CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER, AND VICE PRESIDENT OF INSTITUTIONAL ADVANCEMENT BASED UPON PERFORMANCE AND ACHIEVING ANNUAL GOALS. THE PRESIDENT REVIEWS THE SENIOR MANAGEMENT SALARIES AND REPORTS TO THE COMMITTEE. FACULTY SALARIES ARE SET BY MASSACHUSETTS INSTITUTE OF TECHNOLOGY ON AN ANNUAL BASIS. BENCHMARK AND INDUSTRY SURVEYS ARE REVIEWED FOR ALL WHITEHEAD POSITIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 19:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST ON AN INDIVIDUAL CASE BASIS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER CHANGES IN NET ASSETS OR FUND BALANCES: POSTRETIREMENT RELATED CHANGES: $497,825 TOTAL OTHER CHANGES IN NET ASSETS OR FUND BALANCES: $497,825</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>