﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2024v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-11-13T13:51:15+00:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>346565596</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>ERNST &amp; YOUNG US LLP</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>1101 NEW YORK AVENUE NW</AddressLine1Txt>
        <CityNm>Washington</CityNm>
        <StateAbbreviationCd>DC</StateAbbreviationCd>
        <ZIPCd>20005</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>853776266</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Alzheimers Disease Data Initiative Inc</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>ALZH</BusinessNameControlTxt>
      <PhoneNum>4254974300</PhoneNum>
      <USAddress>
        <AddressLine1Txt>4110 Carillon Point</AddressLine1Txt>
        <CityNm>Kirkland</CityNm>
        <StateAbbreviationCd>WA</StateAbbreviationCd>
        <ZIPCd>98033</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>HILLARY BOUNDS</PersonNm>
      <PersonTitleTxt>SECRETARY</PersonTitleTxt>
      <PhoneNum>4254974300</PhoneNum>
      <SignatureDt>2025-11-13</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Amber N Doane</PreparerPersonNm>
      <PTIN>P01391011</PTIN>
      <PhoneNum>2023276000</PhoneNum>
      <PreparationDt>2025-11-13</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="7">
    <IRS990 documentId="IRS990" softwareId="24020961" softwareVersionNum="2024v5.1">
      <PrincipalOfcrBusinessName>
        <BusinessNameLine1Txt>DAVINA INSLEE</BusinessNameLine1Txt>
      </PrincipalOfcrBusinessName>
      <USAddress>
        <AddressLine1Txt>4110 Carillon Point</AddressLine1Txt>
        <CityNm>Kirkland</CityNm>
        <StateAbbreviationCd>WA</StateAbbreviationCd>
        <ZIPCd>98033</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>12475933</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>false</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>https://www.alzheimersdata.org/</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>2020</FormationYr>
      <LegalDomicileStateCd>DE</LegalDomicileStateCd>
      <ActivityOrMissionDesc>THE ORGANIZATION IS DEDICATED TO ADVANCING SCIENTIFIC BREAKTHROUGHS IN THE DIAGNOSIS, PREVENTION &amp; TREATMENT OF ALZHEIMERS DISEASE AND RELATED DEMENTIAS</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>2</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>2</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <TotalVolunteersCnt>0</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <PYContributionsGrantsAmt>12920879</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>12339343</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>0</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>0</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>42409</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>136590</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>0</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>12963288</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>12475933</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>3438180</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>3014488</CYGrantsAndSimilarPaidAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>0</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>0</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>0</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>7819594</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>14029107</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>11257774</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>17043595</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>1705514</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>-4567662</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>5319702</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>2040922</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>430464</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>1719346</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>4889238</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>321576</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>Alzheimer's Disease Data Initiative is a coalition of leading academic, advocacy, government, industry, and philanthropy organizations that recognizes the need for dementia researchers to find easier ways to share data, analytical tools, and scientific findings. These partners are working together to accelerate progress towards new diagnostics, treatments, and cures for Alzheimer's disease and related dementias. Learn more atwww.alzheimersdata.org.</MissionDesc>
      <SignificantNewProgramSrvcInd>false</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>false</SignificantChangeInd>
      <ExpenseAmt>5168435</ExpenseAmt>
      <Desc>AD Workbench - a free, secure, cloud-based data sharing and analytics environment - is the interoperability layer of the AD Data Initiative technical suite and its flagship product offering. AD Workbench empowers researchers around the world to share, access, and analyze data across platforms. It provides data hosting, offers collaborative workspaces, and supports federated and distributed data sharing via FDSA.There are currently 8,400+ registered AD Workbench users from across 120 countries with access to over 800K participant records. Through AD Workbench, researchers and institutions can accelerate progress towards new and better treatments and diagnostic tools for Alzheimer's disease and related dementias.</Desc>
      <ProgSrvcAccomActy2Grp>
        <ExpenseAmt>5091974</ExpenseAmt>
        <GrantAmt>50000</GrantAmt>
        <Desc>Global Research Platforms - GRIP is a secure, cloud-based, and open-access platform designed to help researchers integrate, analyze, and share complex biomedical data with ease. It is a multi-site, multi-modal collaboration platform with co-developed, modular tools, workflows, and workspaces that enable secure data sharing, analysis, and collaboration.</Desc>
      </ProgSrvcAccomActy2Grp>
      <ProgSrvcAccomActy3Grp>
        <ExpenseAmt>2932616</ExpenseAmt>
        <GrantAmt>2414488</GrantAmt>
        <Desc>The AD Data Initiative product suite consists of data sharing and analytic products along with enabling technical resources to empower researchers around the world to share, access and analyze data across multiple platforms. AD Workbench is the interoperability layer of the AD Data Initiative technical suite and its flagship product offering. There are currently more than 120 datasets accessible via AD Workbench - including clinical tabular data, imaging, omics and biosamples. The AD Data Initiative works closely with data contributors and data platform partners to ensure interoperability with AD data-sharing platforms and data accessibility across the global Alzheimer's data ecosystem.</Desc>
      </ProgSrvcAccomActy3Grp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>2270057</ExpenseAmt>
        <GrantAmt>550000</GrantAmt>
        <Desc>Core to the AD Data Initiative's mission is the belief that data sharing and global collaboration will accelerate progress, seed innovation and lead to breakthroughs faster. AD Data Initiative is advancing a scientific strategy and investing in strategic initiatives to foster global collaboration, empower researchers and advance scientific discovery. These initiatives include: the William H. Gates Sr. Fellowship Program, Global Data Challenges, Scientific Driver Projects and Global Research Collaborations and Consortia. This scientific strategy and the AD Data Initiative's programmatic efforts are guided by an evolving list of priority research questions that have been shaped by insights from Advisory Board members, input from the AD research community and engagement with thought leaders in Alzheimer's and related dementias research.</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <ProgSrvcAccomActyOtherGrp>
        <ExpenseAmt>661862</ExpenseAmt>
        <Desc>The AD Data Initiative amplifies its mission through communications and engagement: website, social media, conferences and events, partnership campaigns/communications and special projects. These efforts expand access to important datasets, broaden the use of data platforms and tools, and foster global collaboration to accelerate discovery.</Desc>
      </ProgSrvcAccomActyOtherGrp>
      <TotalOtherProgSrvcExpenseAmt>2931919</TotalOtherProgSrvcExpenseAmt>
      <TotalOtherProgSrvcGrantAmt>550000</TotalOtherProgSrvcGrantAmt>
      <TotalProgramServiceExpensesAmt>16124944</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="IRS990ScheduleA">true</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="IRS990ScheduleB">true</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd referenceDocumentId="IRS990ScheduleC">false</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
      <ConservationEasementsInd>false</ConservationEasementsInd>
      <CollectionsOfArtInd>false</CollectionsOfArtInd>
      <CreditCounselingInd>false</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>false</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd>false</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd>false</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd>false</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd>false</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd>false</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd>false</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd>false</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd>false</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <ForeignOfficeInd>false</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>false</ScheduleJRequiredInd>
      <TaxExemptBondsInd>false</TaxExemptBondsInd>
      <EscrowAccountInd>false</EscrowAccountInd>
      <OnBehalfOfIssuerInd>false</OnBehalfOfIssuerInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd>false</PYExcessBenefitTransInd>
      <LoanOutstandingInd>false</LoanOutstandingInd>
      <GrantToRelatedPersonInd>false</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>false</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd>false</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>false</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>false</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>false</DeductibleArtContributionInd>
      <TerminateOperationsInd>false</TerminateOperationsInd>
      <PartialLiquidationInd>false</PartialLiquidationInd>
      <DisregardedEntityInd referenceDocumentId="IRS990ScheduleR">true</DisregardedEntityInd>
      <RelatedEntityInd referenceDocumentId="IRS990ScheduleR">true</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>true</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd>false</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>true</ScheduleORequiredInd>
      <IRPDocumentCnt>5</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>true</BackupWthldComplianceInd>
      <EmployeeCnt>0</EmployeeCnt>
      <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>2</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>2</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>false</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>false</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>false</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>false</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>true</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>true</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>true</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>true</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>true</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>false</OfficerMailingAddressInd>
      <LocalChaptersInd>false</LocalChaptersInd>
      <PoliciesReferenceChaptersInd>false</PoliciesReferenceChaptersInd>
      <Form990ProvidedToGvrnBodyInd>true</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>true</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>true</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>true</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>false</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>false</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>false</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>false</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>false</InvestmentInJointVentureInd>
      <WrittenPolicyOrProcedureInd>false</WrittenPolicyOrProcedureInd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>HILLARY BOUNDS</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>4254974300</PhoneNum>
        <USAddress>
          <AddressLine1Txt>4110 CARILLON POINT</AddressLine1Txt>
          <CityNm>KIRKLAND</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98033</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <NoListedPersonsCompensatedInd>X</NoListedPersonsCompensatedInd>
      <Form990PartVIISectionAGrp>
        <PersonNm>Niranjan Bose</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>5.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PAUL RAMSEY</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>HILLARY BOUNDS</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHoursPerWeekRt>10.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TONY POUND</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHoursPerWeekRt>1.0</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>0</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>0</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>false</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>false</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>false</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Zhlke Engineering GmbH</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>Dsseldorfer Str 38</AddressLine1Txt>
            <AddressLine2Txt>65760 Eschborn</AddressLine2Txt>
            <CountryCd>GM</CountryCd>
          </ForeignAddress>
        </ContractorAddress>
        <ServicesDesc>Product Management and Maintenance</ServicesDesc>
        <CompensationAmt>4497228</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Aridhia Informatics Limited</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>163 Bath Street</AddressLine1Txt>
            <CityNm>Glasgow</CityNm>
            <CountryCd>UK</CountryCd>
          </ForeignAddress>
        </ContractorAddress>
        <ServicesDesc>Product Management and Maintenance</ServicesDesc>
        <CompensationAmt>3074628</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>IHME</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>2301 5th Ave Ste 600</AddressLine1Txt>
            <CityNm>Seattle</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98121</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Data collection, analysis, and reporting of results</ServicesDesc>
        <CompensationAmt>1350000</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Evalueserve Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>One City Plaza</AddressLine1Txt>
            <AddressLine2Txt>421 Fayetteville St Suite 200</AddressLine2Txt>
            <CityNm>Raleigh</CityNm>
            <StateAbbreviationCd>NC</StateAbbreviationCd>
            <ZIPCd>27601</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Product Management and Maintenance</ServicesDesc>
        <CompensationAmt>1342110</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Hansell Tierney Inc (HT Talent)</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>2955 80th Ave SE Ste 103</AddressLine1Txt>
            <CityNm>Mercer Island</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98040</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Staffing services</ServicesDesc>
        <CompensationAmt>1001469</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>24</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>12339343</AllOtherContributionsAmt>
      <TotalContributionsAmt>12339343</TotalContributionsAmt>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </TotalOthProgramServiceRevGrp>
      <TotalProgramServiceRevenueAmt>0</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>136590</TotalRevenueColumnAmt>
        <ExclusionAmt>136590</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>0</RealAmt>
        <PersonalAmt>0</PersonalAmt>
      </RentalIncomeOrLossGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>0</SecuritiesAmt>
        <OtherAmt>0</OtherAmt>
      </GainOrLossGrp>
      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
      </NetIncmFromFundraisingEvtGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>0</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>0</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>12475933</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>136590</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>1095289</TotalAmt>
        <ProgramServicesAmt>1095289</ProgramServicesAmt>
      </GrantsToDomesticOrgsGrp>
      <ForeignGrantsGrp>
        <TotalAmt>1919199</TotalAmt>
        <ProgramServicesAmt>1919199</ProgramServicesAmt>
      </ForeignGrantsGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>642039</TotalAmt>
        <ProgramServicesAmt>187552</ProgramServicesAmt>
        <ManagementAndGeneralAmt>454487</ManagementAndGeneralAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>180522</TotalAmt>
        <ProgramServicesAmt>51457</ProgramServicesAmt>
        <ManagementAndGeneralAmt>129065</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>253027</TotalAmt>
        <ManagementAndGeneralAmt>253027</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>1847285</TotalAmt>
        <ProgramServicesAmt>1847285</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>555399</TotalAmt>
        <ProgramServicesAmt>555399</ProgramServicesAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>1048</TotalAmt>
        <ManagementAndGeneralAmt>1048</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>10052424</TotalAmt>
        <ProgramServicesAmt>9971400</ProgramServicesAmt>
        <ManagementAndGeneralAmt>81024</ManagementAndGeneralAmt>
      </InformationTechnologyGrp>
      <TravelGrp>
        <TotalAmt>28680</TotalAmt>
        <ProgramServicesAmt>28680</ProgramServicesAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>100555</TotalAmt>
        <ProgramServicesAmt>100555</ProgramServicesAmt>
      </ConferencesMeetingsGrp>
      <OtherExpensesGrp>
        <Desc>GNPC</Desc>
        <TotalAmt>305221</TotalAmt>
        <ProgramServicesAmt>305221</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>EPND</Desc>
        <TotalAmt>62907</TotalAmt>
        <ProgramServicesAmt>62907</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>0</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>17043595</TotalAmt>
        <ProgramServicesAmt>16124944</ProgramServicesAmt>
        <ManagementAndGeneralAmt>918651</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>1749999</BOYAmt>
        <EOYAmt>1087043</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>3518066</BOYAmt>
        <EOYAmt>837723</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <ReceivablesFromOfficersEtcGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </ReceivablesFromOfficersEtcGrp>
      <RcvblFromDisqualifiedPrsnGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </RcvblFromDisqualifiedPrsnGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>51637</BOYAmt>
        <EOYAmt>116156</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>0</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>0</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>0</BOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>0</BOYAmt>
      </InvestmentsProgramRelatedGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>5319702</BOYAmt>
        <EOYAmt>2040922</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>430464</BOYAmt>
        <EOYAmt>1719346</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <LoansFromOfficersDirectorsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LoansFromOfficersDirectorsGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>430464</BOYAmt>
        <EOYAmt>1719346</EOYAmt>
      </TotalLiabilitiesGrp>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>4889238</BOYAmt>
        <EOYAmt>321576</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>4889238</BOYAmt>
        <EOYAmt>321576</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>5319702</BOYAmt>
        <EOYAmt>2040922</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-4567662</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="24020961" softwareVersionNum="2024v5.1">
      <MedicalResearchOrganizationInd>X</MedicalResearchOrganizationInd>
      <HospitalNameAndAddressGrp>
        <SupportedOrganizationName>
          <BusinessNameLine1Txt>university of washington medical center</BusinessNameLine1Txt>
        </SupportedOrganizationName>
        <CityNm>Seattle</CityNm>
        <StateAbbreviationCd>WA</StateAbbreviationCd>
      </HospitalNameAndAddressGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="24020961" softwareVersionNum="2024v5.1">
      <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>
    <IRS990ScheduleF documentId="IRS990ScheduleF" softwareId="24020961" softwareVersionNum="2024v5.1">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>6</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>1819199</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>12</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Data Support, Research &amp; Development, Conference Sponsorship</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>8127262</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>2</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Grantmaking</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>100000</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>1</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Conference attendance fees and expenses</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>7823</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>21</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>21</TotalEmployeeCnt>
      <SubtotalSpentAmt>10054284</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>10054284</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Platform interoperability, data sharing, data harmonization</PurposeOfGrantTxt>
        <CashGrantAmt>696082</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Data sharing, coordination with sites making data sharable</PurposeOfGrantTxt>
        <CashGrantAmt>500000</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>International data sharing and analysis pilot projects</PurposeOfGrantTxt>
        <CashGrantAmt>449943</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Imaging data sharing and hosting</PurposeOfGrantTxt>
        <CashGrantAmt>73174</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
        <CashGrantAmt>50000</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
        <CashGrantAmt>50000</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
        <CashGrantAmt>50000</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (Including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
        <CashGrantAmt>50000</CashGrantAmt>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>0</Total501c3OrgCnt>
      <TotalOtherOrgCnt>8</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</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>AD DATA INITIATIVE MAINTAINS RECORDS INCLUDING GRANT PROPOSALS AND OTHER INFORMATION USED TO EVALUATE GRANTEES, GRANT AGREEMENTS, REPORTS FROM GRANTEES ON THEIR USE OF FUNDS AND PROJECT STATUS, AND FOLLOW-UP INFORMATION OBTAINED WHILE INVESTIGATING ANY AT-RISK GRANTS. ADDI'S SELECTION PROCESS MAY VARY, BUT IN ANY EVENT THE ORGANIZATION WILL ONLY MAKE A GRANT UPON A WRITTEN DETERMINATION THAT THE RECIPIENT IS A SUITABLE GRANTEE AND THE GRANT WILL FURTHER THE ORGANIZATION'S CHARITABLE PURPOSES. IF ADDI RECEIVES INFORMATION INDICATING THAT A DIVERSION OF GRANT FUNDS HAS TAKEN PLACE, ADDI WILL WITHHOLD ANY FURTHER FUNDS AND WILL INVESTIGATE. IF ADDI DETERMINES THAT A DIVERSION OCCURRED, IT WILL TAKE APPROPRIATE STEPS TO SECURE REPAYMENT AND WITHHOLD FUTURE PAYMENTS UNTIL IT IS SATISFIED FUTURE DIVERSIONS WON'T OCCUR AND THE GRANTEE IS TAKING APPROPRIATE PRECAUTIONS.</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</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; EUROPE (INCLUDING ICELAND AND GREENLAND)-Accrual; SOUTH ASIA-Accrual</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI" softwareId="24020961" softwareVersionNum="2024v5.1">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Davos Alzheimer's Collaborative (DAC)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>225000</CashGrantAmt>
        <PurposeOfGrantTxt>Connecting with and supporting the sharing of data from multiple sites in low-middle income countries to more accurately represent the global population</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Georgia State University Research Foundation (GSU)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>200000</CashGrantAmt>
        <PurposeOfGrantTxt>Understanding the specific and unique challenges that investigators in other countries face when trying to make their data shareable with the larger community of researchers</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Sage Bionetworks</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>195000</CashGrantAmt>
        <PurposeOfGrantTxt>Data platform interoperability</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Answer ALS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>150000</CashGrantAmt>
        <PurposeOfGrantTxt>Data platform interoperability</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>American Heart Association (AHA)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>125289</CashGrantAmt>
        <PurposeOfGrantTxt>Data platform interoperability</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Alleo Labs Corporation</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>145 MISSION STREET</AddressLine1Txt>
          <CityNm>SAN FRANCISCO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94105</ZIPCd>
        </USAddress>
        <IRCSectionDesc>C CORP</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>State of Maryland University of Maryland Baltimore</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>GOV</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>University of California San Francisco (UCSF)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <PurposeOfGrantTxt>Project start for GRIP Vision-Language Machine Learning (ML) Models for Brain Image Analysis</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Washington University in St Louis</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <PurposeOfGrantTxt>Gates Sr. AD Fellowship recipient award</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>8</Total501c3OrgCnt>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule I, Part I, Line 2 Procedures for monitoring use of grant funds</FormAndLineReferenceDesc>
        <ExplanationTxt>ADDI MAINTAINS RECORDS INCLUDING GRANT PROPOSALS AND OTHER INFORMATION USED TO EVALUATE GRANTEES, GRANT AGREEMENTS, REPORTS FROM GRANTEES ON THEIR USE OF FUNDS AND PROJECT STATUS, AND FOLLOW-UP INFORMATION OBTAINED WHILE INVESTIGATING ANY AT-RISK GRANTS. ADDI'S SELECTION PROCESS MAY VARY, BUT IN ANY EVENT THE ORGANIZATION WILL ONLY MAKE A GRANT UPON A WRITTEN DETERMINATION THAT THE RECIPIENT IS A SUITABLE GRANTEE AND THE GRANT WILL FURTHER THE ORGANIZATION'S CHARITABLE PURPOSES. IF ADDI RECEIVES INFORMATION INDICATING THAT A DIVERSION OF GRANT FUNDS HAS TAKEN PLACE, ADDI WILL WITHHOLD ANY FURTHER FUNDS AND WILL INVESTIGATE. IF ADDI DETERMINES THAT A DIVERSION OCCURRED, IT WILL TAKE APPROPRIATE STEPS TO SECURE REPAYMENT AND WITHHOLD FUTURE PAYMENTS UNTIL IT IS SATISFIED FUTURE DIVERSIONS WON'T OCCUR AND THE GRANTEE IS TAKING APPROPRIATE PRECAUTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="24020961" softwareVersionNum="2024v5.1">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4a-4c Description of program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 2,270,057 including grants of $ 550,000) Core to the AD Data Initiative's mission is the belief that data sharing and global collaboration will accelerate progress, seed innovation and lead to breakthroughs faster. AD Data Initiative is advancing a scientific strategy and investing in strategic initiatives to foster global collaboration, empower researchers and advance scientific discovery. These initiatives include: the William H. Gates Sr. Fellowship Program, Global Data Challenges, Scientific Driver Projects and Global Research Collaborations and Consortia. This scientific strategy and the AD Data Initiative's programmatic efforts are guided by an evolving list of priority research questions that have been shaped by insights from Advisory Board members, input from the AD research community and engagement with thought leaders in Alzheimer's and related dementias research.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4a-4c Description of program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 661,862 including grants of $) The AD Data Initiative amplifies its mission through communications and engagement: website, social media, conferences and events, partnership campaigns/communications and special projects. These efforts expand access to important datasets, broaden the use of data platforms and tools, and foster global collaboration to accelerate discovery.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 6 Classes of members or stockholders</FormAndLineReferenceDesc>
        <ExplanationTxt>ALZHEIMERS DISEASE DATA INITIATIVE INC HAS TWO MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 7a Members or stockholders electing members of governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERS OF THE ORGANIZATION HAVE THE RIGHT TO APPOINT AND REMOVE THE DIRECTORS OF THE ORGANIZATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 7b Decisions requiring approval by members or stockholders</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS HAVE THE POWER TO APPOINT SUCCESSOR MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DRAFT RETURN IS REVIEWED BY THE FINANCE AND LEGAL FUNCTIONS AND APPROVED BY THE SECRETARY AND TREASURER. A FINAL VERSION OF THE FORM IS MADE AVAILABLE TO THE BOARD BEFORE FILING WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c Conflict of interest policy</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONFLICT OF INTEREST POLICY APPLIES TO DIRECTORS, OFFICERS AND KEY EMPLOYEES. THEY ARE REQUIRED TO DISCLOSE POTENTIAL CONFLICTS WITH RESPECT TO ANY TRANSACTION TO THE BOARD OF DIRECTORS, OR A COMMITTEE THEREOF, WHICH DETERMINES IF THERE IS A CONFLICT. IF THERE IS A CONFLICT, THE PERSON WITH THE CONFLICT MUST REFRAIN FROM ATTEMPTING TO INFLUENCE DECISIONS REGARDING THE TRANSACTION AND IS NOT PERMITTED TO PARTICIPATE IN DISCUSSIONS OF THE TRANSACTION EXCEPT TO RESPOND TO REQUESTS FOR INFORMATION ABOUT THE TRANSACTION. DIRECTORS, OFFICERS AND KEY EMPLOYEES ARE REQUIRED TO ANNUALLY COMPLETE STATEMENTS DISCLOSING FAMILY MEMBERS AND RELATED ENTITIES WHO MAY DO BUSINESS WITH THE ORGANIZATION. THESE STATEMENTS ARE REVIEWED BY THE ORGANIZATION'S LEGAL COUNSEL AND ARE AVAILABLE FOR INSPECTION BY MEMBERS OF THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>These documents are not available for public inspection</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g Other Fees</FormAndLineReferenceDesc>
        <ExplanationTxt>Other - Total Expense: 1847285, Program Service Expense: 1847285, Management and General Expenses: , Fundraising Expenses: ;</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR" softwareId="24020961" softwareVersionNum="2024v5.1">
      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>GLOBAL RESEARCH PLATFORMS LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>4110 CARILLON POINT</AddressLine1Txt>
          <CityNm>KIRKLAND</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98033</ZIPCd>
        </USAddress>
        <EIN>853776266</EIN>
        <PrimaryActivitiesTxt>PLATFORM MANAGEMENT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <TotalIncomeAmt>5850000</TotalIncomeAmt>
        <EndOfYearAssetsAmt>1250141</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>AD DATA INITIATIVE</BusinessNameLine1Txt>
        </DirectControllingEntityName>
      </IdDisregardedEntitiesGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>BREAKTHROUGH ENERGY CATALYST FOUNDATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 563</AddressLine1Txt>
          <CityNm>KIRKLAND</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98083</ZIPCd>
        </USAddress>
        <EIN>853677542</EIN>
        <PrimaryActivitiesTxt>SCIENTIFIC</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>BREAKTHROUGH ENERGY ACTION INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 563</AddressLine1Txt>
          <CityNm>KIRKLAND</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98083</ZIPCd>
        </USAddress>
        <EIN>853694865</EIN>
        <PrimaryActivitiesTxt>ADVOCACY</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(4)</ExemptCodeSectionTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>BREAKTHROUGH ENERGY FOUNDATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 563</AddressLine1Txt>
          <CityNm>KIRKLAND</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98083</ZIPCd>
        </USAddress>
        <EIN>853672460</EIN>
        <PrimaryActivitiesTxt>SCIENTIFIC</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <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>
    </IRS990ScheduleR>
  </ReturnData>
</Return>