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      <SupplementalInformationDetail>
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        <ExplanationTxt>THE BIOHUB IS EXEMPT FROM INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AS A MEDICAL RESEARCH ORGANIZATION OPERATED IN CONJUNCTION WITH A HOSPITAL AND SECTION 23701D OF THE CALIFORNIA REVENUE AND TAXATION CODE. THE BIOHUB HAS NO UNRECOGNIZED TAX BENEFITS OR LIABILITIES AS OF DECEMBER 31, 2019.</ExplanationTxt>
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        <ExplanationTxt>LOSS ON DISPOSAL OF ASSETS</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>LOSS ON DISPOSAL OF ASSETS</ExplanationTxt>
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        <SpecificServicesProvidedTxt>ATTENDING AND SPEAKING AT CONFERENCES. ALSO SITE VISITS FOR TRAINING AND PROJECT SUPPORT.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>EUROPE</RegionTxt>
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        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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      <RecipientTable>
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          <AddressLine1Txt>PO BOX 0248</AddressLine1Txt>
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      <RecipientTable>
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          <BusinessNameLine1Txt>UC BERKELEY</BusinessNameLine1Txt>
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          <StateAbbreviationCd>CA</StateAbbreviationCd>
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        <RecipientEIN>946002123</RecipientEIN>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>WILLIAM BURKHOLDER</PersonNm>
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        <PersonNm>SONYA ZILKA</PersonNm>
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        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>EQUIPMENT</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>114055</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>FURNITURE &amp; FIXTURES</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>18590</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>COLUMN (B) REPRESENTS THE NUMBER OF CONTRIBUTIONS</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>DR. CHAN (DIRECTOR) AND MR. ZUCKERBERG (DIRECTOR) HAVE A FAMILY RELATIONSHIP. CORI BARGMANN, DR. CHAN AND MR. ZUCKERBERG HAVE A BUSINESS RELATIONSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BYLAWS WERE AMENDED TO STATE: THE PROPERTY OF THE CORPORATION IS IRREVOCABLY DEDICATED TO CHARITABLE OR SCIENTIFIC PURPOSES WITHIN THE MEANING OF SECTION 501(C)(3) OF THE CODE. UPON THE DISSOLUTION OR WINDING UP OF THE CORPORATION, THE ASSETS OF THE CORPORATION REMAINING AFTER PAYMENT, OR PROVISION FOR PAYMENT, OF ALL DEBTS AND LIABILITIES OF THE CORPORATION SHALL BE DISTRIBUTED TO A NONPROFIT FUND, FOUNDATION, OR CORPORATION WHICH IS ORGANIZED AND OPERATED EXCLUSIVELY FOR CHARITABLE OR SCIENTIFIC PURPOSES AND WHICH HAS ESTABLISHED ITS TAX-EXEMPT STATUS UNDER SECTION 501(C)(3) OF THE CODE, OR SHALL BE DISTRIBUTED TO THE FEDERAL GOVERNMENT, OR TO A STATE OR LOCAL GOVERNMENT, FOR A PUBLIC PURPOSE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CHAN ZUCKERBERG INITIATIVE, LLC DESIGNATES TWO BOARD OF DIRECTORS (DESIGNATED DIRECTORS). SUCH DESIGNATED DIRECTORS APPROVE THE APPOINTING, ELECTING, OR REMOVING OF ANY DIRECTOR OF THE ORGANIZATION INCLUDING THE FILLING OF ANY VACANCY OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNANCE DECISIONS ARE SUBJECT TO APPROVAL BY THE TWO DESIGNATED DIRECTORS INCLUDING: -CHANGING THE NATURE OR SCOPE OF THE MISSION. -CHANGING, SELLING OR LICENSING THE NAME OF THE CORPORATION. -APPROVING OR PERMITTING THE USE OF OTHER EXPLOITATION OF THE NAME OF THE CORPORATION BY ANY PARTY, OTHER THAN THE DESIGNATOR, ANY AFFILIATE OR AFFILIATED ENTITY OF THE DESIGNATOR AND, SOLELY IN CONNECTION WITH THE CORPORATION'S ACTIVITIES IN FURTHERANCE OF THE MISSION. -APPOINTING, ELECTING OR REMOVING ANY DIRECTOR OF THE CORPORATION AND FILLING OF ANY VACANCY OF THE BOARD. -INCREASING OR DECREASING THE NUMBER OF DIRECTOR SEATS ON THE BOARD. -APPOINTING, ELECTING OR REMOVING THE CHAIRPERSON -ACCEPTING CONTRIBUTIONS FROM ANY PARTY OTHER THAN FROM THE DESIGNATOR, ANY AFFILIATE OR AFFILIATED ENTITY OF THE DESIGNATOR, OR ANY DONOR ADVISED FUND IN WHICH THE DESIGNATION OR AFFILIATE HAVE ADVISORY PRIVILEGES. OTHER PARTY FUNDING CAN BE ACCEPTED IF THE DESIGNATOR FUNDING SOURCE HAS A MATERIAL BREACH AND ADDITIONAL FUNDING IS NEEDED. -APPROVAL OR EFFECTING OF A MATERIAL SALE OF ASSETS OR MERGER OF THE ORGANIZATION OR CONVERSION INTO ANOTHER FORM OF ENTITY. -APPROVAL OF ACTION CAUSING CHANGE FROM EXEMPT STATUS UNDER 501(A) OF THE CODE. -APPROVAL FOR COMMENCING BANKRUPTCY, INSOLVENCY OR RELIEF OF DEBTORS. -APPROVAL, PERMITTING OR EFFECTING ANY TRANSACTION TO LIQUIDATE, WIND UP OR DISSOLVE THE CORPORATION. -APPROVAL FOR CHANGE TO ORGANIZATION DOCUMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY OUR TAX CONSULTANTS. THE DRAFT IS REVIEWED BY THE CFO OF THE ORGANIZATION. THE FORM 990 IS THEN MADE AVAILABLE TO THE BOARD PRIOR TO THE 990 BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH COVERED PERSON MUST DISCLOSE IN WRITING TO THE CHIEF CONFLICTS OFFICER EACH OF HIS OR HER CONFLICTS OF INTEREST, INCLUDING FINANCIAL INTERESTS, WHEN THEY JOIN THE COMPANY. TO ENSURE THAT POTENTIAL CONFLICTS OF INTEREST AND CONFLICTS OF COMMITMENT ARE DISCLOSED, EACH COVERED PERSON IS REQUIRED TO UPDATE THEIR DISCLOSURE PERIODICALLY THROUGHOUT THE YEAR AT ANY TIME WHEN HIS OR HER PREVIOUSLY DISCLOSED FINANCIAL INTERESTS CHANGE OR A NEW POTENTIAL CONFLICT OF COMMITMENT OR CONFLICT OF INTEREST ARISES. IN ADDITION, CERTAIN EMPLOYEES AT THE LEVEL OF GROUP OR PLATFORM LEADER OR ABOVE ARE REQUIRED TO FILE UPDATED DISCLOSURE STATEMENTS EACH YEAR. THE BOARD OF DIRECTORS APPROVED THE CONFLICT OF COMMITMENT AND CONFLICT OF INTEREST POLICY FOR THE COMPANY, WHICH OUTLINES THE MECHANISMS FOR IMPLEMENTING THE POLICY. THE CHIEF CONFLICTS OFFICER OR IN SOME INSTANCES, THE BOARD OF DIRECTORS OR A COMMITTEE DESIGNATED BY THE BOARD IS RESPONSIBLE FOR INTERPRETING BOTH CONFLICTS OF COMMITMENT AND CONFLICTS OF INTEREST UNDER THE POLICY. THE CHIEF CONFLICTS OFFICER'S PRIMARY RESPONSIBILITY IS DETERMINING WHETHER A CONFLICT OF COMMITMENT OR CONFLICT OF INTEREST EXISTS AND, IF SO, WHETHER THE PROPOSED ACTIVITY OR THE TRANSACTION OR ARRANGEMENT GIVING RISE TO THE CONFLICT IS IN THE BEST INTERESTS OF THE BIOHUB AND CAN PROCEED IN A MANNER THAT PROTECTS THE BIOHUB'S FINANCIAL, SCIENTIFIC, AND REPUTATIONAL INTERESTS. WHEN A COVERED PERSON DISCLOSES AN ACTUAL OR POTENTIAL CONFLICT OF COMMITMENT OR CONFLICT OF INTEREST UNDER THIS POLICY, THE CHIEF CONFLICTS OFFICER WILL FOLLOW THE REVIEW PROCEDURES OUTLINED IN THE POLICY. A COVERED PERSON MAY NOT ENGAGE IN ANY ACTIVITY THAT GIVES RISE TO A CONFLICT OF COMMITMENT OR A CONFLICT OF INTEREST WITHOUT RECEIVING THE APPROVAL(S) REQUIRED IN THIS POLICY. WITH RESPECT TO ANY CONFLICT OF INTEREST, THE COVERED PERSON WILL BE RECUSED FROM ALL DECISIONS INVOLVING THE ACTIVITY GIVING RISE TO THE CONFLICT, AND THE CHIEF CONFLICTS OFFICER, THE BOARD OF DIRECTORS, OR A COMMITTEE DESIGNED BY THE BOARD WILL DETERMINE WHETHER TO PROCEED WITH THE ACTIVITY NOTWITHSTANDING THE CONFLICT. IF THE COVERED PERSON INVOLVED IN THE POTENTIAL OR ACTUAL CONFLICT UNDER REVIEW IS AN OFFICER OF THE BIOHUB, THE CONFLICT REVIEW PROCEDURES WILL BE PERFORMED BY THE BOARD OF DIRECTORS OR A COMMITTEE DESIGNATED BY THE BOARD, ASSISTED BY THE CHIEF CONFLICTS OFFICERAND, IF REQUESTED BY THE BOARD OR COMMITTEE, OUTSIDE COUNSEL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS AND EXECUTIVE COMMITTEE OF THE BOARD REVIEW AND APPROVE THE COMPENSATION OF THE ORGANIZATION'S CO-CHIEF EXECUTIVES, OFFICERS AND KEY EMPLOYEES. THE PROCESS INCLUDES A REVIEW OF THE COMPENSATION AGAINST CURRENT COMPARABILITY DATA SURVEY PREPARED BY AN INDEPENDENT COMPENSATION CONSULTANT. THE APPROVAL PROCESS IS DOCUMENTED CONTEMPORANEOUSLY. THE MOST RECENT COMPARABILITY DATA STUDY WAS COMPLETED IN 2018 AND WAS USED TO SET 2019 COMPENSATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>UPON REQUEST, DOCUMENTS THAT ARE REQUIRED BY LAW TO BE AVAILABLE FOR PUBLIC INSPECTION WILL BE MADE AVAILABLE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 16B</FormAndLineReferenceDesc>
        <ExplanationTxt>BIOHUB HAS EXECUTED CERTAIN WRITTEN COLLABORATION AGREEMENTS IN FURTHERANCE OF ITS EXEMPT MISSION. SUCH CONTRACTS ARE EXECUTED ON TERMS THAT ARE AT ARM'S LENGTH OR MORE FAVORABLE TO BIOHUB.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART VII, SECTION A</FormAndLineReferenceDesc>
        <ExplanationTxt>WHERE 40 HOURS IS LISTED AS HOURS OF SERVICE IN RESPECT OF AN INDIVIDUAL, THIS IS BASED ON AN ESTIMATED FULL-TIME WORK WEEK. ACTUAL HOURS DEVOTED BY THE INDIVIDUAL MAY VARY SIGNIFICANTLY, AND MAY EXCEED THE 40 HOUR ESTIMATE.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>CHAN ZUCKERBERG ADVOCACY</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>314 LYTTON AVENUE SUITE 200</AddressLine1Txt>
          <CityNm>PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </USAddress>
        <EIN>813742328</EIN>
        <PrimaryActivitiesTxt>SOCIAL WELFARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(4)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>N/A</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>CHAN ZUCKERBERG FOUNDATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>314 LYTTON AVENUE SUITE 200</AddressLine1Txt>
          <CityNm>PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </USAddress>
        <EIN>455002209</EIN>
        <PrimaryActivitiesTxt>GRANTMAKING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>PF</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL LAB</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1765 E BAYSHORE RD SUITE A2</AddressLine1Txt>
          <CityNm>E PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94303</ZIPCd>
        </USAddress>
        <EIN>364858582</EIN>
        <PrimaryActivitiesTxt>SOCIAL WELFARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(4)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>N/A</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL - EAST PALO ALTO</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>951 OCONNER STREET</AddressLine1Txt>
          <CityNm>E PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94303</ZIPCd>
        </USAddress>
        <EIN>473334579</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>170(B)(1)(A)(II) SCH</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>OPENNESS FOUNDATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>314 LYTTON AVENUE SUITE 200</AddressLine1Txt>
          <CityNm>PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </USAddress>
        <EIN>270889149</EIN>
        <PrimaryActivitiesTxt>GRANTMAKING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>PF</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>TLP</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>818 W 7TH ST SUITE 930</AddressLine1Txt>
          <CityNm>LOS ANGELES</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>90017</ZIPCd>
        </USAddress>
        <EIN>352645251</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>509(A)(1)</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>FWDUS EDUCATION FUND INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 34506</AddressLine1Txt>
          <CityNm>WASHINGTON DC</CityNm>
          <StateAbbreviationCd>DE</StateAbbreviationCd>
          <ZIPCd>20043</ZIPCd>
        </USAddress>
        <EIN>820962378</EIN>
        <PrimaryActivitiesTxt>EDUCATE THE PUBLIC ABOUT IMMIGRATION AND CRIMINAL JUSTICE POLICY AND REFORM</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>509(A)(1) 170(B)(1)(</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>FWDUS INC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>FWDUS INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 34506</AddressLine1Txt>
          <CityNm>WASHINGTON DC</CityNm>
          <StateAbbreviationCd>DE</StateAbbreviationCd>
          <ZIPCd>20043</ZIPCd>
        </USAddress>
        <EIN>462223015</EIN>
        <PrimaryActivitiesTxt>ADVOCATE FOR IMMIGRATION AND CRIMINAL JUSTICE REFORM</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(4)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>N/A</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>FACEBOOK INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1601 WILLOW ROAD</AddressLine1Txt>
          <CityNm>MENLO PARK</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94025</ZIPCd>
        </USAddress>
        <EIN>201665019</EIN>
        <PrimaryActivitiesTxt>SOCIAL MEDIA SERVICE COMPANY</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE R, PART II AND PART IV</FormAndLineReferenceDesc>
        <ExplanationTxt>ONE OF THE MANAGERS OF CHAN ZUCKERBERG INITIATIVE, LLC ("CZI") ALSO HAS A CONTROLLING INTEREST IN SEVERAL PASSIVE INVESTMENT VEHICLES. THESE INVESTMENT VEHICLES, THE TAX-EXEMPT ENTITIES DISCLOSED UNDER PART II ABOVE, AND FACEBOOK AS DISCLOSED UNDER PART IV ABOVE, MAY TECHNICALLY BE CONSIDERED "RELATED ORGANIZATIONS" OF THE BIOHUB FOR IRS FORM 990 REPORTING PURPOSES THROUGH THEIR RELATIONSHIP WITH ONE OF CZI'S MANAGERS, GIVEN CZI'S RELATIONSHIP WITH THE BIOHUB. EACH OF THESE DISCLOSED ENTITIES IS OTHERWISE UNAFFILIATED WITH AND DOES NOT CONTROL THE BIOHUB, AND THE BIOHUB'S DATA IS NOT SOLD OR SHARED WITH FACEBOOK, THE PASSIVE INVESTMENT VEHICLES, OR ANY OF THE DISCLOSED TAX-EXEMPT ENTITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>