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        <ProgramServicesAmt>346</ProgramServicesAmt>
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        </OrganizationBusinessName>
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          <AddressLine1Txt>10 MITCHELL PL STE 3H</AddressLine1Txt>
          <CityNm>NY</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10017</ZIPCd>
        </USAddress>
        <ActivityTxt>EVENT PLANNER 2021 GALA</ActivityTxt>
        <FundraiserControlOfFundsInd>0</FundraiserControlOfFundsInd>
        <GrossReceiptsAmt>314001</GrossReceiptsAmt>
        <RetainedByContractorAmt>103500</RetainedByContractorAmt>
        <NetToOrganizationAmt>210501</NetToOrganizationAmt>
      </FundraiserActivityInfoGrp>
      <TotalGrossReceiptsAmt>314001</TotalGrossReceiptsAmt>
      <TotalRetainedByContractorsAmt>103500</TotalRetainedByContractorsAmt>
      <TotalNetToOrganizationAmt>210501</TotalNetToOrganizationAmt>
      <FundraisingEventInformationGrp>
        <Event1Nm>FR EVENTS</Event1Nm>
        <GrossReceiptsEvent1Amt>314001</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>314001</CharitableContriEvent1Amt>
        <GrossReceiptsTotalAmt>314001</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>314001</CharitableContributionsTotAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BRIGHAM AND WOMENS HOSPITAL</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>399 REVOLUTION DRIVE SUITE 730</AddressLine1Txt>
          <CityNm>SOMERVILLE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02145</ZIPCd>
        </USAddress>
        <RecipientEIN>042312909</RecipientEIN>
        <IRCSectionDesc>501 C (3)</IRCSectionDesc>
        <CashGrantAmt>75000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CHILDREN'S HOSPITAL OF PHILADELPHIA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3401 CIVIC CENTER BLVD</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19146</ZIPCd>
        </USAddress>
        <RecipientEIN>231352166</RecipientEIN>
        <IRCSectionDesc>502 C (3)</IRCSectionDesc>
        <CashGrantAmt>214388</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MASSACHUSETTS GENERAL HOSPITAL</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>55 FRUIT STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02145</ZIPCd>
        </USAddress>
        <RecipientEIN>042697983</RecipientEIN>
        <IRCSectionDesc>503 C (3)</IRCSectionDesc>
        <CashGrantAmt>203684</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MASSACHUSETTS INSTITUTE OF TECHNOLOGY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>77 MASSACHUSETTS AVENUE</AddressLine1Txt>
          <CityNm>CAMBRIDGE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>021394307</ZIPCd>
        </USAddress>
        <RecipientEIN>042103594</RecipientEIN>
        <IRCSectionDesc>504 C (3)</IRCSectionDesc>
        <CashGrantAmt>223328</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>STANFORD UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>450 SERRA MALL STANFORD</AddressLine1Txt>
          <CityNm>PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94305</ZIPCd>
        </USAddress>
        <RecipientEIN>941156365</RecipientEIN>
        <IRCSectionDesc>505 C (3)</IRCSectionDesc>
        <CashGrantAmt>205656</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THOMAS JEFFERSON UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>833 CHESTNUT STREET</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19107</ZIPCd>
        </USAddress>
        <RecipientEIN>231352651</RecipientEIN>
        <IRCSectionDesc>506 C (3)</IRCSectionDesc>
        <CashGrantAmt>135320</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>TRUSTEES OF COLUMBIA UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>615 WET 131ST STREET 4TH FLOOR</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10027</ZIPCd>
        </USAddress>
        <RecipientEIN>135598093</RecipientEIN>
        <IRCSectionDesc>507 C (3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ALABAMA AT BIRMINGHAM</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1720 2ND AVENUE SOUTH AB 1170</AddressLine1Txt>
          <CityNm>BIRMINGHAM</CityNm>
          <StateAbbreviationCd>AL</StateAbbreviationCd>
          <ZIPCd>352940111</ZIPCd>
        </USAddress>
        <RecipientEIN>636005396</RecipientEIN>
        <IRCSectionDesc>508 C (3)</IRCSectionDesc>
        <CashGrantAmt>75000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF CALIFORNIA IRVINE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>160 ALDRICH HALL</AddressLine1Txt>
          <CityNm>IRVINE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>926977600</ZIPCd>
        </USAddress>
        <RecipientEIN>952226406</RecipientEIN>
        <IRCSectionDesc>509 C (3)</IRCSectionDesc>
        <CashGrantAmt>200584</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF TEXAS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>301 UNIVERSITY BOULEVARD 3508</AddressLine1Txt>
          <AddressLine2Txt>REBECCA SEALY HOSPITAL</AddressLine2Txt>
          <CityNm>GALVESTON</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>775550156</ZIPCd>
        </USAddress>
        <RecipientEIN>746000949</RecipientEIN>
        <IRCSectionDesc>510 C (3)</IRCSectionDesc>
        <CashGrantAmt>75000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WASHINGTON UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>660 S EUCLID AVENUE CAMPUS BOX 8233</AddressLine1Txt>
          <CityNm>SAINT LOUIS</CityNm>
          <StateAbbreviationCd>MO</StateAbbreviationCd>
          <ZIPCd>63110</ZIPCd>
        </USAddress>
        <RecipientEIN>430653611</RecipientEIN>
        <IRCSectionDesc>511 C (3)</IRCSectionDesc>
        <CashGrantAmt>78270</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>SCIENTIFIC RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>11</Total501c3OrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>HDF MONITORS ITS GRANTS BY REQUIRING SCIENCE RESEARCH PROGRESS REPORTS FROM GRANTEES AS A CONDITION TO FURTHER PAYMENTS OF ANY GRANT PAYABLE IN INSTALLMENTS, AND A FINAL REPORT ON COMPLETION OF THE RESEARCH.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <GrntAsstBnftInterestedPrsnGrp>
        <PersonNm>DAVID HOUSEMAN</PersonNm>
        <RelationshipWithOrgTxt>BOARD MEMBER</RelationshipWithOrgTxt>
        <CashGrantAmt>75000</CashGrantAmt>
        <TypeOfAssistanceTxt>RESEARCH GRANT</TypeOfAssistanceTxt>
      </GrntAsstBnftInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>NANCY WEXLER, PRESIDENT, AND ALICE WEXLER, SECRETARY, ARE SISTERS AND BOTH ARE MEMBERS OF THE BOARD OF DIRECTORS. MEGHAN DONALDSON, CEO, AND BRUCE DONALDSON, BOARD MEMBER, ARE MARRIED AND ARE BOTH MEMBERS OF THE BOARD OF DIRECTORS. FRANK GEHRY AND BERTA GEHRY ARE MARRIED AND BOTH ARE MEMBERS OF THE BOARD OF DIRECTORS. SANDY FOX IS THE AUNT OF DAVID ZWALLY AND BOTH ARE MEMBERS OF THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION PROVIDES THE 990 TO THE BOARD OF DIRECTORS FOR APPROVAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUAL CONFLICT OF INTEREST STATEMENTS ARE CIRCULATED TO ALL OFFICERS, DIRECTORS, AND KEY EMPLOYEES AT THE BOARD OF DIRECTORS MEETING. MANAGEMENT MAINTAINS SIGNED COPIES OF THESE STATEMENTS FOR ALL SUCH INDIVIDUALS TO ENSURE COMPLIANCE WITH THIS POLICY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>A WRITTEN EMPLOYEE CONTRACT IS ESTABLISHED AND APPROVED BY THE BOARD OR COMPENSATION COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION MAKES ITS FINANCIAL STATEMENTS AND 990 AVAILABLE TO THE PUBLIC ON ITS WEBSITE, WWW.HDFOUNDATION.ORG. THE FOUNDATION MAKES ITS GOVERING DOCUMENTS AND CONFLICTS OF INTEREST POLICY AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>