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        <PersonNm>MOHANJIT JOLLY</PersonNm>
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        <PersonNm>REEMA KHAN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>AMARESH KOLLIPARA</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARCO LARSEN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MANNAN LATIF</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DAVA NEWMAN</PersonNm>
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        <PersonNm>PIERRE SCHWOB</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JILL TARTER</PersonNm>
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        <PersonNm>STEPHEN TRIMBERGER</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ELIZEBETH VARGHESE</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>AVERY WANG</PersonNm>
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        <PersonNm>BRUCE CAMPBELL</PersonNm>
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        <PersonNm>STEPHEN BOURDOW</PersonNm>
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        <PersonNm>JANICE BISHOP</PersonNm>
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        <PersonNm>JOSEPH TWICKEN</PersonNm>
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        <PersonNm>PETER TENENBAUM</PersonNm>
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        <PersonNm>JAMES ANDY SPRY</PersonNm>
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        <PersonNm>MARGARET TURNBULL</PersonNm>
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        <FundraisingAmt>212627</FundraisingAmt>
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        <EOYAmt>168785</EOYAmt>
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        <EOYAmt>2870710</EOYAmt>
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        <EOYAmt>5479375</EOYAmt>
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        <EOYAmt>8398008</EOYAmt>
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      <FederalGrantAuditPerformedInd>1</FederalGrantAuditPerformedInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
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        <CurrentTaxYearMinus3YearsAmt>26120112</CurrentTaxYearMinus3YearsAmt>
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        <CurrentTaxYearMinus1YearAmt>22478917</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>23207857</CurrentTaxYearAmt>
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          <AddressLine1Txt>11100 JOHNS HOPKINS ROAD</AddressLine1Txt>
          <CityNm>LAUREL</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>207236099</ZIPCd>
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        <RecipientEIN>520595111</RecipientEIN>
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      <RecipientTable>
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          <CityNm>GAINESVILLE</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
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      <RecipientTable>
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          <CityNm>VISTA</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92083</ZIPCd>
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          <CityNm>SAN DIEGO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>941121722</ZIPCd>
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        <RecipientEIN>956042721</RecipientEIN>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
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        </RecipientBusinessName>
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          <AddressLine1Txt>SPONSORED PROJECTS SERVICES 1303 E</AddressLine1Txt>
          <AddressLine2Txt>UNIVERSITY BLVD BOX 3</AddressLine2Txt>
          <CityNm>TUCSON</CityNm>
          <StateAbbreviationCd>AZ</StateAbbreviationCd>
          <ZIPCd>852876011</ZIPCd>
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        <RecipientEIN>742652689</RecipientEIN>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE REGENTS OF THE UNIVERSITY OF CALIFORNIA AT RIVERSIDE</BusinessNameLine1Txt>
        </RecipientBusinessName>
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          <CityNm>RIVERSIDE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>941121722</ZIPCd>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITIES SPACE RESEARCH ASSOCIATION (WASHINGTON DC)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>425 3RD ST SW 950</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20024</ZIPCd>
        </USAddress>
        <RecipientEIN>520892064</RecipientEIN>
        <IRCSectionDesc>UNIVERSITY</IRCSectionDesc>
        <CashGrantAmt>43687</CashGrantAmt>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MILLION CONCEPTS LLC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1355 BARDSTOWN ROAD 132</AddressLine1Txt>
          <CityNm>LOUISVILLE</CityNm>
          <StateAbbreviationCd>KY</StateAbbreviationCd>
          <ZIPCd>40204</ZIPCd>
        </USAddress>
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        <CashGrantAmt>43138</CashGrantAmt>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CAL POLY POMONA FOUNDATION INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3801 W TEMPLE AVE BUILDING 55</AddressLine1Txt>
          <CityNm>POMONA</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>91768</ZIPCd>
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        <RecipientEIN>952417645</RecipientEIN>
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        <CashGrantAmt>40828</CashGrantAmt>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>PHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4170 CITY AVE</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19131</ZIPCd>
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        <RecipientEIN>231355135</RecipientEIN>
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        <CashGrantAmt>40510</CashGrantAmt>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF MICHIGAN</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1000 VICTORS WAY SUITE 1A</AddressLine1Txt>
          <CityNm>ANN ARBOR</CityNm>
          <StateAbbreviationCd>MI</StateAbbreviationCd>
          <ZIPCd>48108</ZIPCd>
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        <RecipientEIN>386006309</RecipientEIN>
        <IRCSectionDesc>UNIVERSITY</IRCSectionDesc>
        <CashGrantAmt>38298</CashGrantAmt>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>SOUTHWEST RESEARCH INSTITUTE (SWRI)</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>6220 CULEBRA ROAD BLDG 160</AddressLine1Txt>
          <CityNm>SAN ANTONIO</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
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      <RecipientTable>
        <RecipientBusinessName>
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          <AddressLine1Txt>12455 COLLECTIONS DRIVE</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
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        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BOSTON UNIVERSITY</BusinessNameLine1Txt>
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          <StateAbbreviationCd>MA</StateAbbreviationCd>
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          <AddressLine2Txt>SUITE A</AddressLine2Txt>
          <CityNm>SUNNYVALE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
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      <RecipientTable>
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          <CityNm>BALTIMORE</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>20910</ZIPCd>
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        <RecipientEIN>526002033</RecipientEIN>
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      <RecipientTable>
        <RecipientBusinessName>
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        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>535 WEST 116TH AND BROADWAY</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
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          <CityNm>NORMAN</CityNm>
          <StateAbbreviationCd>OK</StateAbbreviationCd>
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        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28787</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>230380</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JAMES ANDY SPRY</PersonNm>
        <TitleTxt>SENIOR SCIENTIST</TitleTxt>
        <BaseCompensationFilingOrgAmt>204013</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>16341</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>STEPHEN BOURDOW</PersonNm>
        <TitleTxt>DEPUTY DIRECTOR, OPERATIONS</TitleTxt>
        <BaseCompensationFilingOrgAmt>168166</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13619</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARGARET TURNBULL</PersonNm>
        <TitleTxt>RESEARCH SCIENTIST</TitleTxt>
        <BaseCompensationFilingOrgAmt>192000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>15360</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>489</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>207849</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>4</ContributionCnt>
        <NoncashContributionsRptF990Amt>39116</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <RealEstateOtherGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>240000</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>APPRAISAL</MethodOfDeterminingRevenuesTxt>
      </RealEstateOtherGrp>
      <Form8283ReceivedCnt>1</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>NUMBER OF CONTRIBUTIONS</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE IS COMPOSED OF THE BOARD CHAIR, VICE CHAIR, SECRETARY, PRESIDENT, CEO, AND THE CHAIRS OF THE OTHER BOARD'S COMMITTEES INCLUDING FINANCE, GOVERNANCE, AUDIT AND ENDOWMENT. THE BOARD HAS DELEGATED CERTAIN TASKS AS WELL AS THE AUTHORITY TO ACT ON OTHER MATTERS WHICH FALL BELOW THE DOLLAR THRESHOLDS INDICATED IN THE AUTHORIZATION TABLE. ENUMERATED TASKS INCLUDE EXECUTIVE PERFORMANCE EVALUATION AND COMPENSATION (CEO, CFO).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>UPDATES TO OUR BYLAWS WERE MADE TO REFLECT CURRENT CALIFORNIA REGULATIONS FOR NONPROFIT ORGANIZATIONS, INCLUDING LIMITATION OF INTERESTED PERSONS SERVING ON THE BOARD, CLARIFICATION OF THE EXECUTIVE COMMITTEE'S AUTHORITY LIMITATIONS, AND THE COMPOSITION AND DUTIES OF THE AUDIT COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>WHEN THE FORM IS COMPLETED, AND PRIOR TO SUBMISSION TO THE IRS, THE FORM 990 IS REVIEWED BY THE AUDIT COMMITTEE, SUBCOMMITTEE OF THE BOARD OF TRUSTEES WHICH INCLUDES NON-TRUSTEES AND TRUSTEES. UPON ACCEPTANCE BY THIS SUBCOMMITTEE, THE FORM 990 IS FINALIZED AND DISTRIBUTED TO THE FULL BOARD FOR INFORMATION AND COMMENT AND THEN FILED ELECTRONICALLY WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SETI INSTITUTE HAS A FORMAL CONFLICT OF INTEREST QUESTIONNAIRE THAT IS DESIGNED TO IDENTIFY AND REPORT POSSIBLE CONFLICTS OF INTEREST AMONG OUR DIRECTORS, OFFICERS, AND KEY EMPLOYEES. THIS QUESTIONNAIRE IS DISTRIBUTED ANNUALLY. EMPLOYEES RETURN THE FORM THE HR DIRECTOR EMPLOYEES AND ARE REQUIRED TO REPORT NEW POTENTIAL CONFLICTS AS THEY ARISE DURING THE YEAR. BOARD MEMBERS RETURN THE FORM TO CHAIR OF THE GOVERNANCE COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SETI INSTITUTE USES A PROFESSIONALLY PREPARED COMPENSATION STUDY TO DETERMINE APPROPRIATE COMPENSATION LEVELS FOR ALL EMPLOYEES. ANNUALLY AFTER A REVIEW OF COMPARABLE INDUSTRY COMPENSATION DATA AND PERFORMANCE, THE EXECUTIVE COMMITTEE (BY MAJORITY VOTE) DETERMINES THE APPROPRIATE COMPENSATION FOR THE PRESIDENT/CHIEF EXECUTIVE OFFICER OR THE CHIEF FINANCIAL OFFICER'S. UPON REVIEW OF THIS DATA, MANAGEMENT RECOMMENDS CHANGES TO EMPLOYEE COMPENSATION TO THE FINANCE COMMITTEE AS PART OF THE ANNUAL BUDGET PROCESS. SUBSEQUENTLY, THE BUDGET IS REVIEWED AND APPROVED BY THE FULL BOARD. THE PROCESS WAS LAST UNDERTAKEN IN 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SETI INSTITUTE DISTRIBUTES ITS FINANCIAL INFORMATION TO THE PUBLIC VIA ITS WEBSITE, VIA DUN AND BRADSTREET, AND OTHER OUTSIDE WEBSITES, SUCH AS GUIDESTAR. WE ALSO MAKE OUR FORM 990 AND FINANCIAL STATEMENTS AVAILABLE UPON REQUEST. GOVERNING DOCUMENTS MAY ALSO BE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN VALUE OF SPLIT INTEREST AGREEMENTS 26,822.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS FOR OVERSIGHT OF THE FINANCIAL STATEMENT AUDIT AND FOR SELECTION OF AN INDEPENDENT ACCOUNTANT HAS NOT CHANGED FROM PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>