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      <Desc>IN 2023 THE CHAN ZUCKERBERG BIOHUB NETWORK (CZ BIOHUB NETWORK) CONTINUED TO EXPAND ITS WORK. IN MARCH 2023, CZI ANNOUNCED THE CHAN ZUCKERBERG BIOHUB CHICAGO (CZ BIOHUB CHICAGO) WHICH CATALYZES COLLABORATION BETWEEN THE UNIVERSITY OF CHICAGO, NORTHWESTERN UNIVERSITY, AND THE UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN TO DEVELOP NEW TECHNOLOGIES FOR STUDYING AND MEASURING HUMAN BIOLOGY THAT WILL USE EMBEDDED SENSORS AND PROBES TO COLLECT BIOLOGICAL SIGNALS FROM HUMAN TISSUES WITH UNPRECEDENTED RESOLUTION. CZI ANNOUNCED THE CHAN ZUCKERBERG BIOHUB NEW YORK IN OCTOBER 2023, WHICH BRINGS TOGETHER COLUMBIA UNIVERSITY, THE ROCKEFELLER UNIVERSITY, AND YALE UNIVERSITY TO CREATE NEW TECHNOLOGIES TO CHARACTERIZE AND BIOENGINEER IMMUNE CELLS WITH THE ULTIMATE GOAL OF CREATING DISEASE-SPECIFIC "CELLULAR ENDOSCOPES" THAT CAN DETECT EARLY STAGES OF DISEASE IN CELLS, MONITOR CELL CHANGES, AND RESOLVE DISEASES BEFORE THEY BECOME UNTREATABLE. ALSO IN 2023, CZ BIOHUB CHICAGO HELD A LAUNCH EVENT WITH REPRESENTATIVES FROM THE UNIVERSITY OF CHICAGO, NORTHWESTERN UNIVERSITY, AND THE UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN, AS WELL AS CIVIC LEADERS. TOWARDS CZ BIOHUB CHICAGO'S WORK TO CREATE NEW TECHNOLOGIES TO UNDERSTAND INFLAMMATION, IT LAUNCHED ITS FIRST INVESTIGATOR PROGRAM AND ALSO THE SPOKE AWARDS PROGRAM. THE INVESTIGATOR PROGRAM FUNDS SCIENTISTS TO PERFORM HIGH-RISK, HIGH-REWARD RESEARCH ON TOPICS RELATED TO INSTRUMENTED TISSUES AND RESEARCH LINKED TO INFLAMMATION AND THE FUNCTIONS OF THE IMMUNE SYSTEM. SINGLE AND TEAM PROPOSALS WERE SELECTED AFTER A COMPETITIVE PROCESS THAT LED TO 25 PROJECTS AND 48 INVESTIGATORS. INVESTIGATORS WILL ATTEND QUARTERLY INVESTIGATOR MEETINGS, WHICH PROVIDE OPPORTUNITIES TO BUILD COLLABORATIVE EFFORTS BETWEEN PARTNER UNIVERSITIES AND BIOHUB SCIENTISTS AND ENGINEERS, PRESENT PROGRESS FROM ONGOING WORK, AND INTERACT WITH EXTERNAL SPEAKERS.THE SPOKE AWARDS FACILITATE COLLABORATIONS BETWEEN BIOHUB SCIENTISTS &amp; ENGINEERS AND INVESTIGATORS FROM THE THREE PARTNER UNIVERSITIES. PROJECTS WILL DEVELOP INSTRUMENTED TISSUES AND THEIR APPLICATION TO INFLAMMATION AND THE RELATED FUNCTIONS OF THE IMMUNE SYSTEM. THESE FOCUSED ONE-YEAR PROJECTS WILL ESTABLISH PROOF-OF-CONCEPT FOR A VARIETY OF INSTRUMENTED TISSUES, PRODUCE INITIAL DATA SETS SHOWCASING THE INSTRUMENTED TISSUE APPROACH, AND PURSUE COMPUTATIONAL METHODS FOR FURTHER MINING AND DISSEMINATION OF DATA.THE CZ BIOHUB NETWORK ALSO EXPANDED TO INCLUDE THE CHAN ZUCKERBERG INSTITUTE FOR ADVANCED BIOLOGICAL IMAGING (CHAN ZUCKERBERG IMAGING INSTITUTE), WHICH DEVELOPS IMAGING HARDWARE AND SOFTWARE TECHNOLOGY TO UNDERSTAND COMPLEX BIOLOGICAL SYSTEMS. THE CHAN ZUCKERBERG IMAGING INSTITUTE, IN PARTNERSHIP WITH CZI'S SCIENCE TECHNOLOGY TEAM, DEVELOPED AND RELEASED THE OPEN SOURCE CRYOET DATA PORTAL TO GIVE BIOLOGISTS AND DEVELOPERS OPEN ACCESS TO HIGH-QUALITY, STANDARDIZED, ANNOTATED DATA THEY CAN READILY USE TO RETRAIN OR DEVELOP NEW ANNOTATION MODELS AND ALGORITHMS. THE CHAN ZUCKERBERG IMAGING INSTITUTE ALSO PURCHASED AND ASSEMBLED ITS FIRST KRIOS MICROSCOPE. ADDITIONALLY, THE CHAN ZUCKERBERG IMAGING INSTITUTE RELEASED SEVERAL OPEN ACCESS TOOLS ON ITS WEBSITE, INCLUDING ARETOMO2, GCTFFIND, AND MOTIONCOR3. THE CHAN ZUCKERBERG BIOHUB SAN FRANCISCO (CZ BIOHUB SF) CELEBRATED ITS 7TH ANNIVERSARY AS A MEDICAL RESEARCH ORGANIZATION. CONSISTENT WITH OUR MISSION, CZ BIOHUB SF CONTINUED TO FOCUS ON LARGE-SCALE SCIENTIFIC INITIATIVES THAT WE ARE UNIQUELY POSITIONED TO SUPPORT AND EXECUTE, EACH ON A MULTI-YEAR TIMELINE:1. INTRAMURAL RESEARCH PROJECTS LED BY CZ BIOHUB SF RESEARCHERS AIMED AT UNDERSTANDING DYNAMIC CELL SYSTEMS ACROSS SCALES IN BOTH HEALTHY AND DISEASED STATES.2. PROGRAMS SUPPORTING SCIENTISTS, PHYSICIANS, AND ENGINEERS AT OUR PARTNER UNIVERSITIES (STANFORD UNIVERSITY; UC SAN FRANCISCO; UC BERKELEY) THROUGH THE CZ BIOHUB SF INVESTIGATOR PROGRAM, PHYSICIANSCIENTIST FELLOWSHIP PROGRAM, AND COLLABORATIVE POSTDOCTORAL FELLOWSHIP PROGRAM.HIGHLIGHTS:-OUR COMPUTATIONAL MICROSCOPY TEAM ANNOUNCED THEIR "MANTIS" MICROSCOPY PLATFORM. WHEN COMBINED WITH CZ BIOHUB SF-CREATED SOFTWARE PACKAGES SHRIMPY AND VISCY, THE SYSTEM ENABLES RAPID HIGH-DIMENSIONAL IMAGING OF MOLECULAR DYNAMICS IN THE CONTEXT OF CELL MORPHOLOGY.-LEVERAGING CELL BIOLOGY, DATA SCIENCE, MASS SPECTROMETRY, GENOMICS, AND VIROLOGY, THE INTRACELLULAR ARCHITECTURE GROUP MAPPED THE SUBCELLULAR LOCALIZATION OF VIRTUALLY ALL CELLULAR PROTEINS. WITH THIS APPROACH THEY WERE ABLE TO SHOW HOW A SARS-RELATED CORONAVIRUS CONSCRIPTS CELLULAR MACHINERY, RELOCATING OVER 600 PROTEINS FROM ONE CELLULAR ORGANELLE TO ANOTHER TO SUPPORT VIRAL REPLICATION.-MEMBERS OF THE ORGANISMAL ARCHITECTURE GROUP TRAVELED TO KRAKOW, POLAND, TO PRESENT CZ BIOHUB SF'S ZEBRAHUB PROJECTAN ATLAS OF EARLY ZEBRAFISH DEVELOPMENT THAT COMBINES STATE-OF-THE-ART LIGHT-SHEET IMAGING AND SINGLE-CELL TRANSCRIPTOMICSAT THE 12TH EUROPEAN ZEBRAFISH MEETING. ZEBRAHUB WAS CITED IN A "METHOD OF THE YEAR" ROUNDUP IN THE JOURNAL NATURE METHODS.-CZ BIOHUB SF INVESTIGATOR CHRIS LOWE, ALONG WITH GRADUATE STUDENT LAURENT FORMERY, PUBLISHED A STUDY IN NATURE THAT UPENDED THE GENERALLY ACCEPTED THEORY OF SEA STAR EVOLUTION AND DEVELOPMENT, PROVIDING A NEW SOLUTION TO A LONG-STANDING PUZZLE IN EVOLUTIONARY/DEVELOPMENTAL BIOLOGY. THE WORK WAS COVERED IN THE WASHINGTON POST, SCIENTIFIC AMERICAN, AND MANY OTHER OUTLETS.-OUR RAPID RESPONSE TEAM HOSTED RESEARCHERS FROM THE MAHIDOL-OXFORD TROPICAL MEDICINE RESEARCH UNIT IN BANGKOK FOR SCHOLARLY EXCHANGE AND TRAINING IN NEXT-GENERATION METAGENOMIC SEQUENCING TECHNIQUES FOR INFECTIOUS DISEASE DIAGNOSIS AND SURVEILLANCE.-CZ BIOHUB SF SENIOR INVESTIGATOR PETER KIM OF STANFORD UNIVERSITY DESIGNED A NOVEL, SHELF-STABLE, LOW-COST COVID-19 NANOPARTICLE VACCINE THAT SUCCESSFULLY NEUTRALIZED ALL SARS-COV-2 VARIANTS OF CONCERN, AND ELICITED AN ANTIBODY RESPONSE 100-FOLD GREATER THAN THAT SEEN WITH MRNA-BASED VACCINES.-OUR PRESIDENT, JOSEPH DERISI, AND COLLEAGUES PUBLISHED A PAPER REPORTING THAT NITROXOLINE, A WELL-TOLERATED DRUG APPROVED IN EUROPE FOR URINARY TRACT INFECTIONS, SUCCESSFULLY TREATED A PATIENT INFECTED WITH BALAMUTHIA MANDRILLARIS, A "BRAIN-EATING AMOEBA." B. MANDRILLARIS INFECTIONS ARE ALMOST ALWAYS FATAL, BUT DERISI SHOWED IN A 2018 SCREENING STUDY THAT NITROXOLINE WAS EFFECTIVE AGAINST THE PARASITE IN THE LAB.</Desc>
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        <PersonNm>MIKE SCHROEPFER</PersonNm>
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        <PersonNm>PAUL ALIVISATOS</PersonNm>
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        <PersonNm>PRISCILLA CHAN</PersonNm>
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        <PersonNm>REID HOFFMAN</PersonNm>
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        <PersonNm>SAM ALTMAN</PersonNm>
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        <PersonNm>SAM HAWGOOD</PersonNm>
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        <PersonNm>VICTOR COLUNGA</PersonNm>
        <TitleTxt>CFO &amp; TREASURER</TitleTxt>
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        <PersonNm>MELINDA GRIFFITH</PersonNm>
        <TitleTxt>SECRETARY, CZB NETWORK/CLO, CZB SF</TitleTxt>
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        <PersonNm>SANDRA L SCHMID</PersonNm>
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        <PersonNm>SONYA ZILKA</PersonNm>
        <TitleTxt>CHIEF PEOPLE OFFICER</TitleTxt>
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        <PersonNm>AMY E HERR</PersonNm>
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        <PersonNm>ROSIO ALVAREZ</PersonNm>
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        <PersonNm>SHANA KELLEY</PersonNm>
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        <PersonNm>MATTHIAS HAURY</PersonNm>
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        <PersonNm>DAVID ANDREW AGARD</PersonNm>
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        <PersonNm>CLINTON POTTER</PersonNm>
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        <PersonNm>BRIDGET CARRAGHER</PersonNm>
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        <PersonNm>WILLIAM BURKHOLDER</PersonNm>
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        <PersonNm>ANDREA CALIFANO</PersonNm>
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        <PersonNm>RAFAEL GOMEZ-SJOBERG</PersonNm>
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        <PersonNm>CRAIG KAPFER</PersonNm>
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        <PersonNm>ANNETTE PARENT</PersonNm>
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        <PersonNm>ASTRID HO</PersonNm>
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        <PersonNm>CHRISTOPHER CHIN</PersonNm>
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        <PersonNm>JIM KARKANIAS</PersonNm>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>302166</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANDREA CALIFANO</PersonNm>
        <TitleTxt>PRESIDENT, CZ BIOHUB NY</TitleTxt>
        <BaseCompensationFilingOrgAmt>197981</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>80619</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>3048</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>4609</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>4924</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>291181</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JIM KARKANIAS</PersonNm>
        <TitleTxt>CHIEF TECHNOLOGY OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>192500</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>192500</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>DURING 2023, THE ORGANIZATION PAID SEVERANCE TO THE FOLLOWING INDIVIDUALS: JIM KARKANIAS - $192,500</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>INCENTIVE COMPENSATION WAS PROVIDED TO CERTAIN PERSONS LISTED ON PART VII OF THE FORM 990. INCENTIVE COMPENSATION WAS PAID BASED ON A FIXED PERCENTAGE OF BASE COMPENSATION, PLUS AN ADDITIONAL DISCRETIONARY PERCENTAGE SUBJECT TO BOARD APPROVAL.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>CHAN ZUCKERBERG INITIATIVE LLC</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>ENTITY MANAGED BY DIRECTORS MARK ZUCKERBERG AND PRISCILLA CHAN</RelationshipDescriptionTxt>
        <TransactionAmt>412446</TransactionAmt>
        <TransactionDesc>COLLABORATION REVENUE PAID FROM CZI TO BIOHUB</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>EQUIPMENT</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>6322517</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST OR SELLING PRIC</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>COMMON AREA MAINTENANCE</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>840211</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>COST OR SELLING PRIC</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMOUNT IN COLUMN (B) REPRESENTS THE NUMBER OF CONTRIBUTIONS RECEIVED.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CHAN ZUCKERBERG INSTITUTE FOR ADVANCED BIOLOGICAL IMAGING AIMS TO PUSH FORWARD THE DEVELOPMENT AND APPLICATION OF NEW IMAGING TECHNOLOGIES OVER THE NEXT 10 TO 15 YEARS TO OBTAIN DEEP INSIGHTS INTO THE ARCHITECTURE OF COMPLEX BIOLOGICAL SYSTEMS AT THE MOLECULAR LEVEL. THE CZ IMAGING INSTITUTE WILL CREATE BREAKTHROUGH TECHNOLOGIES HARDWARE, SOFTWARE, BIOLOGICAL PROBES, DATA, AND PLATFORMS THAT WILL BE MADE AVAILABLE TO THE SCIENTIFIC COMMUNITY AND ADOPTED WORLDWIDE THROUGH A COMBINATION OF DIRECT ACCESS TO THE INSTITUTE, OPEN SHARING OF ADVANCES, AND COMMERCIAL PARTNERSHIPS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <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, STEPHEN QUAKE, DR. CHAN, MR. ZUCKERBERG, SHANA KELLEY, MATTHIAS HAURY, JOE DERISI AND ANDREA CALIFANO HAVE A BUSINESS RELATIONSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BYLAWS WERE AMENDED TO CHANGE THE NUMBER OF DIRECTORS OF THE BOARD FROM "TWO" TO NOT LESS THAN ONE." THE BYLAWS WERE ALSO AMENDED TO STATE THAT "ALL DIRECTORS OF THE BOARD SHALL BE DESIGNATED BY CHAN ZUCKERBERG INITIATIVE, LLC."</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>CHAN ZUCKERBERG INITIATIVE, LLC DESIGNATES ALL DIRECTORS OF THE BOARD.</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>THE CONFLICT OF INTEREST POLICY APPLIES TO THE BIOHUB AND ALL DISREGARDED ENTITIES. 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 QUARTERLY 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 OFFICER AND, 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-PRESIDENTS AND OFFICERS. THE PROCESS INCLUDES A REVIEW OF THE COMPENSATION AGAINST COMPARABILITY DATA SURVEY PROVIDED PERIODICALLY BY AN INDEPENDENT COMPENSATION SERVICE. THE APPROVAL PROCESS IS DOCUMENTED CONTEMPORANEOUSLY. THE MOST RECENT COMPARABILITY DATA STUDY WAS COMPLETED IN 2022.</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 13 &amp; LINE 14</FormAndLineReferenceDesc>
        <ExplanationTxt>THE WHISTLEBLOWER POLICY AND WRITTEN RETENTION AND DESTRUCTION POLICY APPLY TO THE CHAN ZUCKERBERG BIOHUB, INC. AND ALL THE DISREGARDED ENTITIES.</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">
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>CZ BIOHUB SF LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>499 ILLINOIS ST 4TH FLOOR</AddressLine1Txt>
          <CityNm>SAN FRANCISCO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94158</ZIPCd>
        </USAddress>
        <EIN>882010111</EIN>
        <PrimaryActivitiesTxt>MEDICAL RESEARCH</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
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        <EndOfYearAssetsAmt>548858530</EndOfYearAssetsAmt>
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      </IdDisregardedEntitiesGrp>
      <IdDisregardedEntitiesGrp>
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          <AddressLine1Txt>3400 BRIDGE PARKWAY</AddressLine1Txt>
          <CityNm>REDWOOD CITY</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94065</ZIPCd>
        </USAddress>
        <EIN>882242512</EIN>
        <PrimaryActivitiesTxt>MEDICAL RESEARCH</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <TotalIncomeAmt>488757898</TotalIncomeAmt>
        <EndOfYearAssetsAmt>506052464</EndOfYearAssetsAmt>
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      </IdDisregardedEntitiesGrp>
      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>CZ BIOHUB CHICAGO LLC</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>400 NORTH ABERDEEN ST SUITE 800</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60642</ZIPCd>
        </USAddress>
        <EIN>922259616</EIN>
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        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <TotalIncomeAmt>207815025</TotalIncomeAmt>
        <EndOfYearAssetsAmt>203923572</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>CHAN ZUCKERBERG BIOHUB INC</BusinessNameLine1Txt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>CZ BIOHUB NEW YORK LLC</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>650 W 168TH STREET WILLIAM BLACK BU</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10032</ZIPCd>
        </USAddress>
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        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
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        <EndOfYearAssetsAmt>202166575</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>CHAN ZUCKERBERG BIOHUB INC</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>CHAN ZUCKERBERG INITIATIVE ADVOCACY</BusinessNameLine1Txt>
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          <AddressLine1Txt>314 LYTTON AVE</AddressLine1Txt>
          <CityNm>PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
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        <EIN>813742328</EIN>
        <PrimaryActivitiesTxt>SOCIAL WELFARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
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        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>CHAN ZUCKERBERG INITIATIVE FOUNDATION</BusinessNameLine1Txt>
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          <AddressLine1Txt>314 LYTTON AVE</AddressLine1Txt>
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        <EIN>455002209</EIN>
        <PrimaryActivitiesTxt>GRANTMAKING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>PF</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>FWDUS EDUCATION FUND INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
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          <AddressLine1Txt>PO BOX 34506</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20043</ZIPCd>
        </USAddress>
        <EIN>820962378</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>FWDUS INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>PO BOX 34506</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20043</ZIPCd>
        </USAddress>
        <EIN>462223015</EIN>
        <PrimaryActivitiesTxt>SOCIAL WELFARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(4)</ExemptCodeSectionTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>GRADIENT LEARNING</BusinessNameLine1Txt>
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          <AddressLine1Txt>340 S LEMON AVE 6119</AddressLine1Txt>
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          <StateAbbreviationCd>CA</StateAbbreviationCd>
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        </USAddress>
        <EIN>352645251</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL - EAST PALO ALTO</BusinessNameLine1Txt>
        </DisregardedEntityName>
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          <AddressLine1Txt>2086 CLARKE AVE</AddressLine1Txt>
          <CityNm>EAST 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>2</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL LAB</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>2086 CLARKE AVE</AddressLine1Txt>
          <CityNm>EAST PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94303</ZIPCd>
        </USAddress>
        <EIN>364858582</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(4)</ExemptCodeSectionTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>2086 CLARKE AVE</AddressLine1Txt>
          <CityNm>EAST PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94303</ZIPCd>
        </USAddress>
        <EIN>371975407</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>2</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE PRIMARY SCHOOL BAY AREA</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>2086 CLARKE AVE</AddressLine1Txt>
          <CityNm>EAST PALO ALTO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94303</ZIPCd>
        </USAddress>
        <EIN>844481558</EIN>
        <PrimaryActivitiesTxt>EDUCATION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>2</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>META PLATFORMS INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1601 WILLOW RD</AddressLine1Txt>
          <CityNm>MENLO PARK</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94025</ZIPCd>
        </USAddress>
        <EIN>201665019</EIN>
        <PrimaryActivitiesTxt>SOCIAL MEDIA</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>1</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>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>CHAN ZUCKERBERG INITIATIVE FOUNDATION</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>C</TransactionTypeTxt>
        <InvolvedAmt>32822517</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH OR FAIR VALUE</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE R, PART II</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TAX-EXEMPT ENTITIES REPORTED ON SCHEDULE R, SECTION II ARE "RELATED ORGANIZATIONS" FOR IRS FORM 990 REPORTING PURPOSES THROUGH THEIR COMMON RELATIONSHIP WITH A MANAGER OF CHAN ZUCKERBERG INITIATIVE LLC'S ("CZI LLC") MEMBER. OPERATIONALLY THESE ENTITIES DO NOT CONTROL EACH OTHER AND ARE SEPARATELY GOVERNED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE R, PART IV</FormAndLineReferenceDesc>
        <ExplanationTxt>META PLATFORMS INC IS REPORTED AS A "RELATED ORGANIZATION" FOR IRS FORM 990 REPORTING PURPOSES THROUGH ITS COMMON RELATIONSHIP WITH A MANAGER OF CZI LLC'S MEMBER. META AND THE FILING ORGANIZATION ARE OPERATIONALLY UNRELATED AND SEPARATELY GOVERNED. ONE OF THE MANAGERS OF CZI LLC'S MEMBER ALSO HAS A CONTROLLING INTEREST IN SEVERAL PERSONAL PASSIVE INVESTMENT VEHICLES THAT HAVE NO RELATIONSHIP WITH THE ENTITIES REPORTED ON SCHEDULE R.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>