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      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
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      <BuildingsGrp />
      <LeaseholdImprovementsGrp />
      <EquipmentGrp />
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      <ForeignIndividualsGrantsGrp>
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      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE F, PART I, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION AWARDS TRAVEL STIPENDS TO MEETING ATTENDEES FROM LOW AND MIDDLE INCOME COUNTRIES. THE AMOUNT OF THESE STIPENDS ARE BASED ON EXPECTED TRAVEL COSTS. THE ORGANIZATION MONITORS THE USE OF THESE FUNDS BY TRACKING ATTENDANCE AT EVENTS FOR WHICH TRAVEL STIPENDS HAVE BEEN AWARDED. THE ORGANIZATION MONITORS THE USE OF SUBAWARD FUNDS BY PERIODICALLY REVIEWING BUDGET TO ACTUAL REPORTS TO ENSURE FUNDS ARE USED ACCORDING TO THE SUBAWARD AGREEMENT, AS WELL AS REVIEWING PROJECT PROGRESS AGAINST PROJECT GOALS. EXPENSES ARE ACCOUNTED FOR ON AN ACCRUAL BASIS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART I, LINE 1 AND PART III, LINE 1 TO SUPPORT THE DEVELOPMENT OF A GLOBAL COLLABORATION AMONG RESEARCHERS TO DEVELOP A COMPREHENSIVE REFERENCE MAP OF ALL HUMAN CELLS AS A BASIS FOR UNDERSTANDING HUMAN HEALTH AND DIAGNOSING, MONITORING AND TREATING DISEASE; RECOMMEND BEST PRACTICES CONCERNING THE STORAGE, PROCESSING, AND ACCESS OF DATA COLLECTED THROUGH SUCH EFFORTS; AND ADVANCE THE PURSUIT OF RESEARCH AND EDUCATION IN SINGLE CELL AND SPATIAL GENOMICS AND RELATED SUBJECTS, INCLUDING PROTEOMICS AND OTHER "OMICS" FIELDS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>STATEMENT OF PROGRAM SERVICE ACCOMPLISHMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART III, LINE 4A HUMAN CELL ATLAS, INC. OPERATES FOR EDUCATIONAL AND SCIENTIFIC PURPOSES TO SUPPORT THE DEVELOPMENT OF THE HUMAN CELL ATLAS - A COMPREHENSIVE REFERENCE MAP OF ALL HUMAN CELLS. THE HUMAN CELL ATLAS IS AN OPEN GLOBAL CONSORTIUM THAT CONSISTS OF OVER 3,200 MEMBERS FROM OVER 1,700 INSTITUTES AND 99 COUNTRIES. HUMAN CELL ATLAS, INC. PROVIDES SUSTAINABLE FINANCIAL MANAGEMENT FOR THE CENTRAL ACTIVITIES OF THIS CONSORTIUM AND ENSURES GLOBAL COMPLIANCE WITH REGIONAL AND NATIONAL DATA PROTECTION REGULATIONS. IN FISCAL YEAR 2023, HUMAN CELL ATLAS, INC. HELD VIRTUAL AND IN-PERSON MEETINGS, WORKSHOPS, AND SEMINARS, REACHING OVER 800 ATTENDEES IN OVER 55 COUNTRIES. OVER 190 SCIENTIFIC PUBLICATIONS TO DATE ARE PART OF THE HUMAN CELL ATLAS. THE ORGANIZATION IS COMMITTED TO CREATING AN OPEN, ETHICAL, EQUITABLE AND REPRESENTATIVE ATLAS FOR HUMANITY, WHICH WILL BENEFIT COMMUNITIES WORLDWIDE. HUMAN CELL ATLAS DATA IS BEING MADE AVAILABLE AT THE DATA COORDINATION PLATFORM FOR RESEARCHERS AROUND THE GLOBE. THROUGH FISCAL YEAR 2023, DATA SPANNING 364 PROJECTS, COMPRISING AN ESTIMATED 44.5 MILLION CELLS, HAS BEEN MADE AVAILABLE TO RESEARCHERS THROUGH THE PLATFORM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>DELEGATION OF CONTROL OVER MANAGEMENT DUTIES</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VI, LINE 3 HUMAN CELL ATLAS, INC. PAID $470,171 TO BROAD INSTITUTE, INC., AN UNRELATED ORGANIZATION, IN CALENDAR YEAR 2022 FOR PROGRAM AND MANAGEMENT/GENERAL STAFFING. THESE PERSONNEL, ALONG WITH PERSONNEL FROM THE WELLCOME SANGER INSTITUTE, RIKEN, AND THE GENOME INSTITUTE OF SINGAPORE, PERFORMED THE DAILY OPERATIONS OF HUMAN CELL ATLAS, INC. UNDER THE MANAGEMENT OF THE ORGANIZATION'S BOARD CO-CHAIRS. INCLUDED IN THESE PAYMENTS WAS $155,827 FOR SERVICES PERFORMED BY JOHN RANDELL, SECRETARY. THESE PAYMENTS TO BROAD INSTITUTE, INC. WERE UNRELATED TO HIS OFFICER ROLE. ADDITIONALLY, HUMAN CELL ATLAS, INC. PAID $74,327 TO BROAD INSTITUTE, INC. IN CALENDAR YEAR 2022 FOR ADMINISTRATIVE SERVICES (FINANCE, SPONSORED RESEARCH, IT, GENERAL ADMINISTRATION, ETC.). THESE FEES INCLUDED THE HOURS THAT MARY DAVIS, TREASURER, SPENT DEVOTED TO HUMAN CELL ATLAS, INC., BUT THE AMOUNTS BILLED WERE NOT ITEMIZED BY FUNCTION OR INDIVIDUAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>DOCUMENTATION OF COMMITTEE MEETINGS OR WRITTEN ACTIONS UNDERTAKEN</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VI, LINE 8B THE ORGANIZATION DOES NOT HAVE ANY COMMITTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>REVIEW OF 990</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VI, LINE 11B HUMAN CELL ATLAS, INC'S FORM 990 WAS PREPARED WITH THE ASSISTANCE OF THE ORGANIZATION'S AUDITORS, PRICEWATERHOUSECOOPERS LLP. THE FULL BOARD OF DIRECTORS RECEIVED A COMPLETED COPY OF THE FORM 990 PRIOR TO THE FORM BEING FILED WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CONFLICT OF INTEREST</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART VI, LINE 12C EACH DIRECTOR AND OFFICER HAS A DUTY TO PLACE THE INTEREST OF HUMAN CELL ATLAS, INC. FOREMOST IN ANY DEALING WITH THE ORGANIZATION AND HAS A CONTINUING RESPONSIBILITY TO COMPLY WITH THE REQUIREMENTS OF THIS POLICY AND TO DISCLOSE ANY ACTUAL OR POSSIBLE CONFLICT OF INTEREST. ANNUALLY, EACH DIRECTOR AND OFFICER SHALL ACKNOWLEDGE THEIR FAMILIARITY WITH THIS POLICY AND SHALL DISCLOSE IN WRITING TO THE SECRETARY ANY EXISTING FINANCIAL OR OTHER MATERIAL INTERESTS SUBJECT TO THIS POLICY BY COMPLETING A CONFLICT OF INTEREST DISCLOSURE STATEMENT. THE CONFLICT OF INTEREST DISCLOSURE STATEMENTS SHALL BE REVIEWED BY THE SECRETARY. ANY ISSUES NOT PREVIOUSLY DISCLOSED SHALL BE REFERRED BY THE SECRETARY TO THE BOARD. THE CONFLICT OF INTEREST DISCLOSURE STATEMENTS SHALL BE RETAINED IN THE CONFIDENTIAL FILES OF THE SECRETARY. IN THE EVENT OF POTENTIAL CONFLICT, AN INTERESTED PERSON MAY MAKE A PRESENTATION AT THE BOARD OR COMMITTEE MEETING, BUT AFTER SUCH PRESENTATION, HE OR SHE WILL LEAVE THE MEETING DURING THE DISCUSSION OF, AND THE VOTE ON, THE TRANSACTION OR ARRANGEMENT THAT RESULTS IN THE CONFLICT OF INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PUBLIC DISCLOSURE OF DOCUMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VI, LINE 18 THE FORM 990 IS MADE AVAILABLE UPON REQUEST AND ON GUIDESTAR.ORG. THE FORM 1023 IS MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>AVAILABILITY OF DOCUMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VI, LINE 19 HUMAN CELL ATLAS INC'S AUDITED FINANCIAL STATEMENTS ARE ATTACHED TO THE ANNUALLY FILED MASSACHUSETTS FORM PC, WHICH IS AVAILABLE TO THE PUBLIC. THE ORGANIZATION'S GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>INDEPENDENT CONTRACTORS</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 PART VII, SECTION B, LINE 1B SERVICES PROVIDED BY THE BROAD INSTITUTE, INC. INCLUDE PROGRAM AND MANAGEMENT/GENERAL STAFFING AND ADMINISTRATIVE SUPPORT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:PROGRAM &amp; MGMT STAFFING TOTAL FEES:746449</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:ADMINISTRATIVE SERVICES TOTAL FEES:107550</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:EVENT SERVICES TOTAL FEES:60297</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 PART IX LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION:OTHER TOTAL FEES:125</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
