﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2023v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-08-07T11:46:29+00:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>363990892</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Capin Crouse LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>55 Shuman Blvd Suite 300</AddressLine1Txt>
        <CityNm>Naperville</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60563</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>263486606</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Council on Tall Buildings and Urban Habitat</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>COUN</BusinessNameControlTxt>
      <PhoneNum>3122835644</PhoneNum>
      <USAddress>
        <AddressLine1Txt>104 S Michigan Avenue 620</AddressLine1Txt>
        <CityNm>Chicago</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60603</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Francisco Javier Quintana de Una</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <PhoneNum>3122835644</PhoneNum>
      <SignatureDt>2024-08-07</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>Daren Daiga</PreparerPersonNm>
      <PTIN>P01074795</PTIN>
      <PhoneNum>5055022746</PhoneNum>
      <PreparationDt>2024-08-07</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-08-08 14:25:15Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="10">
    <IRS990 documentId="IRS990" softwareId="23017437" softwareVersionNum="2023v5.1">
      <PrincipalOfcrBusinessName>
        <BusinessNameLine1Txt>Francisco Javier Quintana de Una</BusinessNameLine1Txt>
      </PrincipalOfcrBusinessName>
      <USAddress>
        <AddressLine1Txt>104 S Michigan Avenue 620</AddressLine1Txt>
        <CityNm>Chicago</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60603</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>6979726</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>false</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>www.ctbuh.org</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>2008</FormationYr>
      <LegalDomicileStateCd>IL</LegalDomicileStateCd>
      <ActivityOrMissionDesc>To disseminate multi-disciplinary information on all aspects of tall buildings.</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>10</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>9</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>35</TotalEmployeeCnt>
      <TotalVolunteersCnt>9</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>0</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>3240704</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>3875410</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>1712664</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>1642365</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>231252</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>275428</CYInvestmentIncomeAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>5184620</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>5793203</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>18750</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>55000</CYGrantsAndSimilarPaidAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>3299275</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>3906018</CYSalariesCompEmpBnftPaidAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>616029</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>1680141</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>2159442</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>4998166</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>6120460</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>186454</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>-327257</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>13991113</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>14674929</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>1710565</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>1559410</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>12280548</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>13115519</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>To disseminate multi-disciplinary information on all aspects of tall buildings and sustainable urban environments, to maximize the international interaction of professionals involved in creating the built environment, and to make the most recent knowledge available.</MissionDesc>
      <SignificantNewProgramSrvcInd>false</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>false</SignificantChangeInd>
      <ExpenseAmt>1763040</ExpenseAmt>
      <GrantAmt>0</GrantAmt>
      <RevenueAmt>1171167</RevenueAmt>
      <Desc>CTBUH events offer a wide variety of benefits to attendees, speakers, and sponsors. As the recognized international authority on tall buildings, CTBUH conferences are best known by industry leaders for both quality of knowledge-sharing and networking opportunities. By holding conferences and events throughout the world, CTBUH maximizes the international interaction of professionals involved in creating the built environment and makes the most recent knowledge available to these professionals.</Desc>
      <ProgSrvcAccomActy2Grp>
        <ExpenseAmt>838953</ExpenseAmt>
        <GrantAmt>0</GrantAmt>
        <RevenueAmt>315110</RevenueAmt>
        <Desc>CTBUH performs objective research and thought leadership at all scales and distributes findings in the form of technical guidelines, white papers, data studies, and reports that highlight critical issues facing tall buildings and future cities.</Desc>
      </ProgSrvcAccomActy2Grp>
      <ProgSrvcAccomActy3Grp>
        <ExpenseAmt>752724</ExpenseAmt>
        <GrantAmt>0</GrantAmt>
        <RevenueAmt>0</RevenueAmt>
        <Desc>CTBUH's membership is made up of the world's leading owners, developers, planners, engineers, designers, suppliers, and builders of the vertical urban realm. Through meaningful, multidisciplinary engagement, CTBUH offers its members the opportunity to share best practice information, promote their expertise globally and in their local region, and shape the future of cities. CTBUH Assemblies comprise dynamic, member-driven committees that can contribute their expertise to CTBUH in many ways: educational programming, research publications, journal articles and peer review participation.</Desc>
      </ProgSrvcAccomActy3Grp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>644044</ExpenseAmt>
        <GrantAmt>0</GrantAmt>
        <RevenueAmt>0</RevenueAmt>
        <Desc>CTBUH developed the international standards for measuring and defining tall buildings, as outlined on its website, and is recognized as the arbiter for bestowing designations such as the "World's Tallest Building." These standards also inform the basis of the CTBUH Tall Building Database, the world's premier online resource for accurate, reliable information on tall building data. The CTBUH website provides the public with detailed data, images, and technical information on more than 40,000 tall buildings, and their cities, the world over.</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>575944</ExpenseAmt>
        <GrantAmt>0</GrantAmt>
        <RevenueAmt>156088</RevenueAmt>
        <Desc>Through the publication of books, proceedings, technical guides, research reports, and a monthly newsletter, CTBUH disseminates multidisciplinary information on all aspects of tall buildings and sustainable urban environments.</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>250419</ExpenseAmt>
        <GrantAmt>55000</GrantAmt>
        <RevenueAmt>0</RevenueAmt>
        <Desc>CTBUH offers annual competitions for professionals and students to engage in design and research projects. The evaluation of competition proposals and designs are undertaken by an expert peer review committee, which reflects a multi-disciplinary group of tall building/urban experts from around the world with experience in varying fields. The Masters of Tall Buildings and Vertical Urbanism (M.TBVU) program is a collaboration between CTBUH and the Illinois Institute of Technology (IIT), and is the world's first multidisciplinary advanced degree focused specifically on the high-rise and the role of urban density in future cities.</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <TotalOtherProgSrvcExpenseAmt>1470407</TotalOtherProgSrvcExpenseAmt>
      <TotalOtherProgSrvcGrantAmt>55000</TotalOtherProgSrvcGrantAmt>
      <TotalOtherProgSrvcRevenueAmt>156088</TotalOtherProgSrvcRevenueAmt>
      <TotalProgramServiceExpensesAmt>4825124</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="IRS990ScheduleA">true</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="IRS990ScheduleB">true</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
      <ConservationEasementsInd>false</ConservationEasementsInd>
      <CollectionsOfArtInd>false</CollectionsOfArtInd>
      <CreditCounselingInd>false</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>false</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="IRS990ScheduleD">true</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="IRS990ScheduleD">true</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd>false</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd>false</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="IRS990ScheduleD">true</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd>false</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="IRS990ScheduleD">true</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd>false</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <ForeignOfficeInd>true</ForeignOfficeInd>
      <ForeignActivitiesInd referenceDocumentId="IRS990ScheduleF">true</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd referenceDocumentId="IRS990ScheduleF">true</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>false</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>false</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>false</FundraisingActivitiesInd>
      <GamingActivitiesInd>false</GamingActivitiesInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <GrantsToOrganizationsInd referenceDocumentId="IRS990ScheduleI">true</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
      <ScheduleJRequiredInd referenceDocumentId="IRS990ScheduleJ">true</ScheduleJRequiredInd>
      <TaxExemptBondsInd>false</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd>false</PYExcessBenefitTransInd>
      <LoanOutstandingInd>false</LoanOutstandingInd>
      <GrantToRelatedPersonInd>false</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>false</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd referenceDocumentId="IRS990ScheduleL">true</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>false</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>false</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>false</DeductibleArtContributionInd>
      <TerminateOperationsInd>false</TerminateOperationsInd>
      <PartialLiquidationInd>false</PartialLiquidationInd>
      <DisregardedEntityInd>false</DisregardedEntityInd>
      <RelatedEntityInd referenceDocumentId="IRS990ScheduleR">true</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>true</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd>false</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>true</ScheduleORequiredInd>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <IRPDocumentCnt>8</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>true</BackupWthldComplianceInd>
      <EmployeeCnt>35</EmployeeCnt>
      <EmploymentTaxReturnsFiledInd>true</EmploymentTaxReturnsFiledInd>
      <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>false</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>false</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>false</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>false</Form8282PropertyDisposedOfInd>
      <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
      <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
      <IndoorTanningServicesInd>false</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>false</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>10</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>9</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>false</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>false</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>false</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>false</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>false</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>false</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>false</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>true</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>true</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>false</OfficerMailingAddressInd>
      <LocalChaptersInd>true</LocalChaptersInd>
      <PoliciesReferenceChaptersInd>true</PoliciesReferenceChaptersInd>
      <Form990ProvidedToGvrnBodyInd>true</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>true</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>false</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>true</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>true</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>true</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>true</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>true</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>false</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>IL</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>Patti Thurmond</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>3122835644</PhoneNum>
        <USAddress>
          <AddressLine1Txt>104 S Michigan Avenue Suite 620</AddressLine1Txt>
          <CityNm>Chicago</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60603</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Charu Thapar</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Francisco Javier Quintana de Una</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Chief Executive Officer</TitleTxt>
        <AverageHoursPerWeekRt>50.0</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>361784</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>58506</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Shonn Mills</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee (part year), Chairman</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Steve Watts</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Chairman &amp; Secretary (part year), Vice-Chairman</TitleTxt>
        <AverageHoursPerWeekRt>2.0</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>David Seel</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Kam Chuen Tse</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Katrin Forster</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Mounib Hammoud</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Scott Duncan</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Shaofeng Wang</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Trustee</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Antony D Wood</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>President</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>10.0</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>509274</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>74162</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Patricia Thurmond</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>VP Finance and Administration</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>119440</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>22679</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Brian McLaren</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Sr Director Technology</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>157934</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>26952</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Charles Mutscheller</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Director Marketing &amp; Communications</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>133717</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>21127</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Steven Henry</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Sr Director Events &amp; Strategic Initiatives</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>133588</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>34232</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Tracie Moxley</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Director Member Engagement</TitleTxt>
        <AverageHoursPerWeekRt>40.0</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>107017</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>36416</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>1522754</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>274074</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>7</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>false</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>true</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>false</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Marina Bay Sands Singapore</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>10 Bayfront Ave</AddressLine1Txt>
            <CityNm>Singapore</CityNm>
            <CountryCd>SN</CountryCd>
            <ForeignPostalCd>018956</ForeignPostalCd>
          </ForeignAddress>
        </ContractorAddress>
        <ServicesDesc>2023 Conf. Venue, Rooms &amp; Functions, AV, Exhibit</ServicesDesc>
        <CompensationAmt>525945</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>1</CntrctRcvdGreaterThan100KCnt>
      <MembershipDuesAmt>1437393</MembershipDuesAmt>
      <AllOtherContributionsAmt>2438017</AllOtherContributionsAmt>
      <TotalContributionsAmt>3875410</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>Congress &amp; conferences</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1171167</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1171167</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Research</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>315110</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>315110</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Publications</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>156088</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>156088</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </TotalOthProgramServiceRevGrp>
      <TotalProgramServiceRevenueAmt>1642365</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>275428</TotalRevenueColumnAmt>
        <ExclusionAmt>275428</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>0</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </RentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>1186523</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>1186523</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>0</SecuritiesAmt>
        <OtherAmt>0</OtherAmt>
      </GainOrLossGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>0</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>5793203</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1642365</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>275428</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>40000</TotalAmt>
        <ProgramServicesAmt>40000</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>15000</TotalAmt>
        <ProgramServicesAmt>15000</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>1282516</TotalAmt>
        <ProgramServicesAmt>977771</ProgramServicesAmt>
        <ManagementAndGeneralAmt>146831</ManagementAndGeneralAmt>
        <FundraisingAmt>157914</FundraisingAmt>
      </CompCurrentOfcrDirectorsGrp>
      <CompDisqualPersonsGrp>
        <TotalAmt>111807</TotalAmt>
        <ProgramServicesAmt>111807</ProgramServicesAmt>
      </CompDisqualPersonsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>2083868</TotalAmt>
        <ProgramServicesAmt>1562142</ProgramServicesAmt>
        <ManagementAndGeneralAmt>251377</ManagementAndGeneralAmt>
        <FundraisingAmt>270349</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>98418</TotalAmt>
        <ProgramServicesAmt>75032</ProgramServicesAmt>
        <ManagementAndGeneralAmt>11268</ManagementAndGeneralAmt>
        <FundraisingAmt>12118</FundraisingAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>107415</TotalAmt>
        <ProgramServicesAmt>81892</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12298</ManagementAndGeneralAmt>
        <FundraisingAmt>13225</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>221994</TotalAmt>
        <ProgramServicesAmt>169245</ProgramServicesAmt>
        <ManagementAndGeneralAmt>25415</ManagementAndGeneralAmt>
        <FundraisingAmt>27334</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>19729</TotalAmt>
        <ProgramServicesAmt>7512</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12217</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>46528</TotalAmt>
        <ProgramServicesAmt>17715</ProgramServicesAmt>
        <ManagementAndGeneralAmt>28813</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>52401</TotalAmt>
        <ManagementAndGeneralAmt>52401</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <OfficeExpensesGrp>
        <TotalAmt>154456</TotalAmt>
        <ProgramServicesAmt>132080</ProgramServicesAmt>
        <ManagementAndGeneralAmt>20498</ManagementAndGeneralAmt>
        <FundraisingAmt>1878</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>204417</TotalAmt>
        <ProgramServicesAmt>153313</ProgramServicesAmt>
        <ManagementAndGeneralAmt>25552</ManagementAndGeneralAmt>
        <FundraisingAmt>25552</FundraisingAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>227561</TotalAmt>
        <ProgramServicesAmt>170671</ProgramServicesAmt>
        <ManagementAndGeneralAmt>28445</ManagementAndGeneralAmt>
        <FundraisingAmt>28445</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>154591</TotalAmt>
        <ProgramServicesAmt>141261</ProgramServicesAmt>
        <ManagementAndGeneralAmt>649</ManagementAndGeneralAmt>
        <FundraisingAmt>12681</FundraisingAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>934093</TotalAmt>
        <ProgramServicesAmt>859638</ProgramServicesAmt>
        <ManagementAndGeneralAmt>13199</ManagementAndGeneralAmt>
        <FundraisingAmt>61256</FundraisingAmt>
      </ConferencesMeetingsGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>16635</TotalAmt>
        <ManagementAndGeneralAmt>16635</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>13859</TotalAmt>
        <ManagementAndGeneralAmt>13859</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Publications</Desc>
        <TotalAmt>65346</TotalAmt>
        <ProgramServicesAmt>64580</ProgramServicesAmt>
        <ManagementAndGeneralAmt>766</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Staff development</Desc>
        <TotalAmt>34490</TotalAmt>
        <ProgramServicesAmt>14074</ProgramServicesAmt>
        <ManagementAndGeneralAmt>15139</ManagementAndGeneralAmt>
        <FundraisingAmt>5277</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Research &amp; resource library</Desc>
        <TotalAmt>166788</TotalAmt>
        <ProgramServicesAmt>165685</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1103</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Dues &amp; subscriptions</Desc>
        <TotalAmt>13078</TotalAmt>
        <ProgramServicesAmt>10665</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2413</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>55470</TotalAmt>
        <ProgramServicesAmt>55041</ProgramServicesAmt>
        <ManagementAndGeneralAmt>429</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>6120460</TotalAmt>
        <ProgramServicesAmt>4825124</ProgramServicesAmt>
        <ManagementAndGeneralAmt>679307</ManagementAndGeneralAmt>
        <FundraisingAmt>616029</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>75009</BOYAmt>
        <EOYAmt>152606</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>2939023</BOYAmt>
        <EOYAmt>2704803</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>2494</BOYAmt>
        <EOYAmt>354590</EOYAmt>
      </AccountsReceivableGrp>
      <ReceivablesFromOfficersEtcGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </ReceivablesFromOfficersEtcGrp>
      <RcvblFromDisqualifiedPrsnGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </RcvblFromDisqualifiedPrsnGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>153461</BOYAmt>
        <EOYAmt>183919</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>186076</BOYAmt>
        <EOYAmt>298232</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>153150</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>134026</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>35759</BOYAmt>
        <EOYAmt>19124</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>7751889</BOYAmt>
        <EOYAmt>8151260</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>2366907</BOYAmt>
        <EOYAmt>2501138</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>0</BOYAmt>
      </InvestmentsProgramRelatedGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>480495</BOYAmt>
        <EOYAmt>309257</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>13991113</BOYAmt>
        <EOYAmt>14674929</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>148198</BOYAmt>
        <EOYAmt>164354</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>998818</BOYAmt>
        <EOYAmt>1045593</EOYAmt>
      </DeferredRevenueGrp>
      <LoansFromOfficersDirectorsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LoansFromOfficersDirectorsGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>563549</BOYAmt>
        <EOYAmt>349463</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>1710565</BOYAmt>
        <EOYAmt>1559410</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>12199298</BOYAmt>
        <EOYAmt>13070519</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>81250</BOYAmt>
        <EOYAmt>45000</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>12280548</BOYAmt>
        <EOYAmt>13115519</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>13991113</BOYAmt>
        <EOYAmt>14674929</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>-327257</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>1151118</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>11110</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="23017437" softwareVersionNum="2023v5.1">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>3873709</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2154009</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>2813230</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3240704</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3875410</CurrentTaxYearAmt>
        <TotalAmt>15957062</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>3873709</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2154009</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>2813230</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3240704</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3875410</CurrentTaxYearAmt>
        <TotalAmt>15957062</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>581240</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>15375822</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>157756</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>138392</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>153750</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>231252</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>275428</CurrentTaxYearAmt>
        <TotalAmt>956578</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>0</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>0</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>0</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>0</CurrentTaxYearAmt>
        <TotalAmt>0</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>16913640</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>6720570</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.9091</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.9099</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="23017437" softwareVersionNum="2023v5.1">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="IRS990ScheduleD" softwareId="23017437" softwareVersionNum="2023v5.1">
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>153150</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>134026</DepreciationAmt>
        <BookValueAmt>19124</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>19124</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>Corporate bonds</Desc>
        <BookValueAmt>2501138</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>2501138</TotalBookValueSecuritiesAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Operating lease obligation</Desc>
        <Amt>349463</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>349463</TotalLiabilityAmt>
      <TotalRevEtcAuditedFinclStmtAmt>7175801</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>1151118</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>272771</DonatedServicesAndUseFcltsAmt>
      <OtherRevenueAmt>11110</OtherRevenueAmt>
      <RevenueNotReportedAmt>1434999</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>5740802</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>52401</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>0</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>52401</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>5793203</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>6340830</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>272771</DonatedServicesUseFcltsAmt>
      <OtherExpensesIncludedAmt>0</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>272771</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>6068059</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>52401</InvestmentExpensesNotIncld2Amt>
      <OtherExpensesNotIncludedAmt>0</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>52401</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>6120460</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XI, Line 2(d) Other revenues in audited financial statements not in form 990</FormAndLineReferenceDesc>
        <ExplanationTxt>Foreign exchange gain - 11110</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="IRS990ScheduleF" softwareId="23017437" softwareVersionNum="2023v5.1">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <OfficesCnt>1</OfficesCnt>
        <EmployeeCnt>1</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Research</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>78423</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>10000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>North America (Canada &amp; Mexico only)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>5000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>1</OfficesCnt>
        <EmployeeCnt>2</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Office, staffing, travel, and other program expenses</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>175370</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>2</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>3</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>2</TotalOfficeCnt>
      <TotalEmployeeCnt>3</TotalEmployeeCnt>
      <SubtotalSpentAmt>268793</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>268793</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <PurposeOfGrantTxt>Seed Funding Research</PurposeOfGrantTxt>
        <CashGrantAmt>5000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>EFT</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <PurposeOfGrantTxt>Seed Funding Research</PurposeOfGrantTxt>
        <CashGrantAmt>5000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>EFT</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>North America (Canada &amp; Mexico only)</RegionTxt>
        <PurposeOfGrantTxt>Seed Funding Research</PurposeOfGrantTxt>
        <CashGrantAmt>5000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>EFT</MannerOfCashDisbursementTxt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>0</Total501c3OrgCnt>
      <TotalOtherOrgCnt>3</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>true</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule F, Part I, Line 2 Procedures for monitoring use of grant funds</FormAndLineReferenceDesc>
        <ExplanationTxt>The internal control procedures for each of the offices abroad include monthly monitoring , review, and input to the overall HQ financial accounts by the staff accountant at HQ and overseen by the VP of Finance &amp; Administration. Every request for funds to be sent to the Venice or China Office is substantiated and approved by the Chief Executive Officer's personal review and sign off.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule F, Part I, Line 3 Method used to account for expenditures on org's financial statements</FormAndLineReferenceDesc>
        <ExplanationTxt>EAST ASIA AND THE PACIFIC-Accrual; EUROPE (INCLUDING ICELAND AND GREENLAND)-Accrual; NORTH AMERICA (CANADA &amp; MEXICO ONLY)-Accrual</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule F, Part II, Line 1 Method used to account for expenditures on org's financial statements</FormAndLineReferenceDesc>
        <ExplanationTxt>EAST ASIA AND THE PACIFIC-Accrual; NORTH AMERICA (CANADA &amp; MEXICO ONLY)-Accrual</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI" softwareId="23017437" softwareVersionNum="2023v5.1">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Illinois Institute of Technology College of Architecture</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3360 S State St</AddressLine1Txt>
          <CityNm>Chicago</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60616</ZIPCd>
        </USAddress>
        <RecipientEIN>362170136</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>15000</CashGrantAmt>
        <PurposeOfGrantTxt>Student Research Award</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Thomas Jefferson University</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4201 Henry Avenue</AddressLine1Txt>
          <CityNm>Philadelphia</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19144</ZIPCd>
        </USAddress>
        <RecipientEIN>231352651</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>15000</CashGrantAmt>
        <PurposeOfGrantTxt>Student Design Research Travel Grant</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Pennsylvania State University College of Arts and Architecture</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>101 Borland Building</AddressLine1Txt>
          <CityNm>University Park</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>16802</ZIPCd>
        </USAddress>
        <RecipientEIN>246000376</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>Seed Funding Awards</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>3</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule I, Part I, Line 2 Procedures for monitoring use of grant funds.</FormAndLineReferenceDesc>
        <ExplanationTxt>The internal control procedures for each domestic grant include monthly monitoring , review, and input to the overall HQ financial accounts by the staff accountant at HQ and overseen by the VP of Finance &amp; Administration. Every request for funds is substantiated and approved by the Chief Executive Officer's personal review and sign off.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ" softwareId="23017437" softwareVersionNum="2023v5.1">
      <HousingAllowanceOrResidenceInd>X</HousingAllowanceOrResidenceInd>
      <WrittenPolicyRefTAndEExpnssInd>false</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>true</SubstantiationRequiredInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>true</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>true</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Francisco Javier Quintana de Una</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Chief Executive Officer</TitleTxt>
        <BaseCompensationFilingOrgAmt>266599</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>30867</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>64318</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>27582</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>30924</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>420290</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Antony D Wood</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>President</TitleTxt>
        <BaseCompensationFilingOrgAmt>248767</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>211049</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>49458</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>44260</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>29902</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>583436</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Brian McLaren</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Sr Director Technology</TitleTxt>
        <BaseCompensationFilingOrgAmt>146962</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>10282</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>690</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13548</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>13404</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>184886</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Steven Henry</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Sr Director Events &amp; Strategic Initiatives</TitleTxt>
        <BaseCompensationFilingOrgAmt>122744</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>10653</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>191</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12690</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>21542</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>167820</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Charles Mutscheller</BusinessNameLine1Txt>
        </BusinessName>
        <TitleTxt>Director Marketing &amp; Communications</TitleTxt>
        <BaseCompensationFilingOrgAmt>125267</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>7387</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1063</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11218</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>9909</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>154844</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1a Housing allowance or residence for personal use</FormAndLineReferenceDesc>
        <ExplanationTxt>A housing allowance of $64,318 was provided to Francisco Javier Quintana de Una, CEO. This was included in his taxable income.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1b Written policy regarding payment or reimbursement of expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board reviewed and approved the housing allowance provision.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 5a Compensation contingent on revenues of the organization</FormAndLineReferenceDesc>
        <ExplanationTxt>Consistent with the President's employment contract, the organization paid to the President additional compensation at a rate of 7.5% contingent upon new revenue brought to the organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 7 Non-fixed payments</FormAndLineReferenceDesc>
        <ExplanationTxt>The board approved nonfixed payments made in the form discretionary bonuses.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part II Part VII, Line 5</FormAndLineReferenceDesc>
        <ExplanationTxt>Antony D. Wood, President, received compensation and benefits from Illinois Institute of Technology (IIT) for services provided to IIT as part of a joint academic appointment in his role as President of CTBUH, the filing organization. Total reportable compensation for Antony was $298,225 and non-taxable benefits was $29,902 as reported on his 2023 IIT Form W-2. Of this amount, CTBUH is responsible for $279,911 and the amount paid directly by IIT is $48,216 under the joint agreement.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="IRS990ScheduleL" softwareId="23017437" softwareVersionNum="2023v5.1">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>Tansri Muliani Wood</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Family member of Antony D. Wood, President</RelationshipDescriptionTxt>
        <TransactionAmt>111808</TransactionAmt>
        <TransactionDesc>Compensation and benefits</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="23017437" softwareVersionNum="2023v5.1">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d Description of other program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 644,044 including grants of $ 0)(Revenue $ 0) CTBUH developed the international standards for measuring and defining tall buildings, as outlined on its website, and is recognized as the arbiter for bestowing designations such as the "World's Tallest Building." These standards also inform the basis of the CTBUH Tall Building Database, the world's premier online resource for accurate, reliable information on tall building data. The CTBUH website provides the public with detailed data, images, and technical information on more than 40,000 tall buildings, and their cities, the world over.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d Description of other program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 575,944 including grants of $ 0)(Revenue $ 156,088) Through the publication of books, proceedings, technical guides, research reports, and a monthly newsletter, CTBUH disseminates multidisciplinary information on all aspects of tall buildings and sustainable urban environments.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d Description of other program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 250,419 including grants of $ 55,000)(Revenue $ 0) CTBUH offers annual competitions for professionals and students to engage in design and research projects. The evaluation of competition proposals and designs are undertaken by an expert peer review committee, which reflects a multi-disciplinary group of tall building/urban experts from around the world with experience in varying fields. The Masters of Tall Buildings and Vertical Urbanism (M.TBVU) program is a collaboration between CTBUH and the Illinois Institute of Technology (IIT), and is the world's first multidisciplinary advanced degree focused specifically on the high-rise and the role of urban density in future cities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part V, Line 2a</FormAndLineReferenceDesc>
        <ExplanationTxt>Council on Tall Buildings and Urban Habitat (CTBUH) does not file any W-2s as all payroll, benefits, and payroll tax returns administered through a contracted professional employment organization (PEO). The number of CTBUH employees reported on this line represents the number for which CTBUH reimburses the PEO for all salaries, benefits, payroll taxes, employer costs and added fees. All reimbursed staff expenses are reported on 990 Part VII, Section A and 990 Part IX, Lines 5 - 10.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 1a Delegate broad authority to a committee</FormAndLineReferenceDesc>
        <ExplanationTxt>Section 1. The Executive Committee shall consist of members, all of whom shall be voting Trustees, except for the Executive Director, who shall be ex-officio with the power to vote and who shall be counted as part of a quorum for the purpose of transacting business. The Chair, Vice Chair, Executive Director, Secretary and Treasurer of the Board of Trustees shall be members of the Executive Committee. The purpose of the Executive Committee shall be to act on behalf of the Board of Trustees between regularly scheduled meetings of the Board of Trustees where in the business judgment of the Executive Committee an emergency exists, or there is insufficient time to call a special meeting of the Board of Trustees as provided for in these Bylaws, or the Board of Trustees has delegated to the Executive Committee the authority to act on its behalf; assist the Chair and the Executive Director with their responsibilities to enable the Board of Trustees to function effectively and efficiently, i.e. oversee the work of Board Committees and the Council's planning process and progress on achieving planning goals; and to develop a process to evaluate the performance of the Executive Director. Unless the Board of Trustees delegates to the Executive Committee the authority to act on its behalf, the following items are reserved for action by the Board of Trustees: selection, termination, compensation and evaluation (provided the evaluation of the Executive Director's performance will be subject to the provisions of the Executive Director's employment contract) of the Executive Director; selection of corporate legal counsel for the Council; Trustee and Board Officer election and removal; changes in institutional mission, goals and philosophy; amendments to the articles of incorporation; incurring of corporate indebtedness; sale of Council assets or tangible property; and adoption of the annual budget. Without limitation, the following powers are specifically not delegated to the Executive Committee and are reserved for the Board of Trustees: (a) amending or repealing these Bylaws or the Articles of Incorporation; (b) electing, appointing, or removing any Officer, Trustee, or member of any committee, or fixing the compensation of any member of a committee; (c) adopting a plan of merger or adopting a plan of consolidation with another corporation; (d) authorizing the sale, lease, exchange, or mortgage of all or substantially all of the property or assets of the Corporation; (e) filling vacancies on the Board of Trustees or any of its committees; (f) adopting a plan for the distribution of the assets of the Corporation or for dissolution; or (g) amending, altering, repealing, or taking any action inconsistent with any resolution or action of the Board of Trustees which by its terms provides that it shall not be amended, altered, or repealed by any such committee. Section 3. The Executive Committee shall meet as often as is necessary to conduct its business as the Chair determines. A majority of voting Trustee Executive Committee members shall constitute a quorum.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is prepared by an independent CPA firm and reviewed in detail by the organization's top management. The reviewed Form 990 is then provided to the board of directors prior to filing with the IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c Conflict of interest policy</FormAndLineReferenceDesc>
        <ExplanationTxt>A trustee shall be considered to have a conflict of interest if a trustee (1) has existing or potential financial or other interests that impair or appear to impair the trustee's independent, unbiased judgement in the discharge of his or her responsibilities to CTBUH or (2) is aware that a member of the trustee's family has a financial or other interests that impair or appear to impair the trustee's independent judgement in the discharge of his or her responsibilities to CTBUH. For purposes of this provision, a family member is defined as a spouse, parent, sibling, child, or any other relative residing in the same household as the trustee. Each trustee shall complete and sign a disclosure form provided annually and reviewed by the Board of Trustees. All trustees shall disclose to the board any possible conflict of interest at the earliest practical time. The trustee shall absent himself or herself from discussions of, and abstain from voting on, such matters under consideration by the Board of Trustees or its committees. The minutes of such meeting shall reflect that a disclosure was made and that the trustee with a conflict or possible conflict abstained from voting. Any trustee who is uncertain as to whether a conflict of interest may exist in any matter may request that the Board or committee resolve the question in his or her absence by majority vote.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a Process to establish compensation of top management official</FormAndLineReferenceDesc>
        <ExplanationTxt>The President's overall compensation is determined and approved by the board of directors; which includes the IIT portion of his salary, contracted with the IIT College of Architecture. The annual compensation review is completed based on individual and company performance variables and comparability data is regularly used in this process. This process is documented in the board minutes and as part of the budget approval process.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15b Process to establish compensation of other employees</FormAndLineReferenceDesc>
        <ExplanationTxt>The compensation for all other officers is determined and approved by the board of directors. The annual compensation review on all officers is completed based on individual and company performance variables and comparability data is regularly used in this process. This process is documented in the board minutes and as part of the budget approval process.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>The governing documents, conflict of interest policy and financial statements are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9 Other changes in net assets or fund balances</FormAndLineReferenceDesc>
        <ExplanationTxt>Foreign exchange gain - 11110;</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR" softwareId="23017437" softwareVersionNum="2023v5.1">
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>CTBUH Business Consulting (Shangai) Co Ltd</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <ForeignAddress>
          <AddressLine1Txt>1239 Si Ping Rd</AddressLine1Txt>
          <AddressLine2Txt>Yangpu District</AddressLine2Txt>
          <ProvinceOrStateNm>Shanghai</ProvinceOrStateNm>
          <CountryCd>CH</CountryCd>
        </ForeignAddress>
        <PrimaryActivitiesTxt>Tall Buildings</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>CH</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Council on Tall Buildings and Urban Habitat</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C Corporation</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>227913</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>188448</ShareOfEOYAssetsAmt>
        <OwnershipPct>1</OwnershipPct>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>false</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>false</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>false</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>false</TransferFromOtherOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule R, Part IV</FormAndLineReferenceDesc>
        <ExplanationTxt>In order to operate under the laws in China, Council on Tall Buildings and Urban Habitat established a foreign non-governmental organization (NGO). The NGO has the same board as the filing organization and the NGO operations represent Council on Tall Buildings and Urban Habitat's operations in China under Council on Tall Buildings and Urban Habitat 's Board's supervision. Per our interpretation of the Form 990 instructions and in order to file a complete and accurate return, the NGO's operations are included in the financial activity reported on this Form 990 and the NGO is reported in Schedule R, Part IV as a related organization.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>