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        <CurrentTaxYearMinus3YearsAmt>248713</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>231066</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>193442</CurrentTaxYearMinus1YearAmt>
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        <FormAndLineReferenceDesc>SCHEDULE A, PART II, LINE 10, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER OPERATING REVENUE - 2015 AMOUNT: $ 22,461. 2016 AMOUNT: $ 10,779. 2017 AMOUNT: $ 21,415. 2018 AMOUNT: $ 35,410. 2019 AMOUNT: $ 7,165.</ExplanationTxt>
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          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
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      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <SolicitedAssetsSaleInd>0</SolicitedAssetsSaleInd>
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        <DepreciationAmt>566617</DepreciationAmt>
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      <EquipmentGrp>
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      <TotalBookValueLandBuildingsAmt>715283</TotalBookValueLandBuildingsAmt>
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        <Desc>DEPOSITS HELD IN ESCROW</Desc>
        <Amt>6250</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED RENT</Desc>
        <Amt>1028366</Amt>
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      <TotalLiabilityAmt>1034616</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>7633514</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>106654</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>235426</DonatedServicesAndUseFcltsAmt>
      <RevenueNotReportedAmt>342080</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>7291434</RevenueSubtotalAmt>
      <OtherRevenuesNotIncludedAmt>-536</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>-536</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>7290898</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>9647000</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>235426</DonatedServicesUseFcltsAmt>
      <ExpensesNotReportedAmt>235426</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>9411574</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>-536</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>-536</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>9411038</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CENTER HAS A COLLECTION OF ARTWORK PRINCIPALLY COMPRISED OF PAINTINGS. THE ARTWORK IS UTILIZED BY THE CENTER FOR OFFICE DECORATION, SERVING TO ENHANCE ITS FACILITIES FOR ITS PERSONNEL AND VISITORS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CENTER IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND HAS BEEN CLASSIFIED AS AN ORGANIZATION THAT IS NOT A PRIVATE FOUNDATION. HOWEVER, INCOME FROM CERTAIN ACTIVITIES NOT DIRECTLY RELATED TO THE CENTER'S TAX-EXEMPT PURPOSE IS SUBJECT TO TAXATION AS UNRELATED BUSINESS INCOME. THE CENTER HAS A POLICY IN PLACE THAT CLARIFIES THE ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES RECOGNIZED IN AN ENTITY'S FINANCIAL STATEMENTS. THE POLICY PRESCRIBES A RECOGNITION THRESHOLD AND MEASUREMENT PRINCIPLES FOR THE FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT OF TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN ON A TAX RETURN THAT ARE NOT CERTAIN TO BE REALIZED. THE IMPLEMENTATION OF THIS POLICY HAD NO IMPACT ON THE CENTER'S FINANCIAL STATEMENTS. THE CENTER'S TAX RETURNS ARE SUBJECT TO REVIEW AND EXAMINATION BY FEDERAL, STATE AND LOCAL AUTHORITIES. THE TAX RETURNS FOR THE YEARS 2018 - 2016 ARE OPEN TO EXAMINATION BY FEDERAL, LOCAL AND STATE AUTHORITIES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOREIGN CURRENCY LOSS -536.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOREIGN CURRENCY LOSS -536.</ExplanationTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>EUROPE</RegionTxt>
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      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
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      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>357655</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>357655</TotalSpentAmt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
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      <AnyNonFixedPaymentsInd>1</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
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        <PersonNm>BRIAN FINLAY</PersonNm>
        <TitleTxt>PRESIDENT &amp; CEO</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>6600</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11899</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>947</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>212428</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL STAFF ARE ELIGIBLE FOR REIMBURSEMENT OF UP TO 70% OF THE FIRST $80 OF MONTHLY WELLNESS RELATED ACTIVITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 7</FormAndLineReferenceDesc>
        <ExplanationTxt>BRIAN FINLAY WAS AWARDED A BONUS IN 2019 FOR EXCELLENCE IN HIS ROLE AS PRESIDENT OF THE ORGANIZATION, AND FOR FURTHER EXPANDING THE ORGANIZATION'S PROGRAM ACTIVITIES AND MISSION. THE BONUS WAS CALCULATED TO BE REASONABLE AND COMMENSURATE WITH HIS BASE COMPENSATION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART I, LINE 1, DESCRIPTION OF ORGANIZATION MISSION:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE STIMSON CENTER PROMOTES INTERNATIONAL SECURITY, SHARED PROSPERITY &amp; JUSTICE THROUGH APPLIED RESEARCH AND INDEPENDENT ANALYSIS, DEEP ENGAGEMENT, AND POLICY INNOVATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 1, DESCRIPTION OF ORGANIZATION MISSION:</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR THREE DECADES, STIMSON HAS BEEN A LEADING VOICE ON URGENT GLOBAL ISSUES. FOUNDED IN THE TWILIGHT YEARS OF THE COLD WAR, THE STIMSON CENTER PIONEERED PRACTICAL NEW STEPS TOWARD STABILITY AND SECURITY IN AN UNCERTAIN WORLD. TODAY, AS CHANGES IN POWER AND TECHNOLOGY USHER IN A CHALLENGING NEW ERA, STIMSON IS AT THE FOREFRONT: ENGAGING NEW VOICES, GENERATING INNOVATIVE IDEAS AND ANALYSIS, AND BUILDING SOLUTIONS TO PROMOTE INTERNATIONAL SECURITY, PROSPERITY, AND JUSTICE. CONNECT WITH THE PROBLEM. STIMSON MATCHES ACADEMIC RIGOR WITH PRACTICAL EXPERIENCE, ON-THE-GROUND FIELD RESEARCH, AND ENGAGEMENT WITH NEW PERSPECTIVES AND UNCOMMON CONSTITUENCIES. TECHNOLOGY HAS EMPOWERED COUNTLESS NEW ACTORS WHO ARE ESSENTIAL TO TACKLING TODAY'S TRANSNATIONAL THREATS. FROM MOZAMBIQUE TO MYANMAR, SAIGON TO STOCKHOLM, AND COUNTLESS PLACES IN BETWEEN, STIMSON RESEARCHERS ARE DEEPLY ENGAGED WITH PEOPLE AND PROBLEMS AROUND THE WORLD. GENERATE NEW IDEAS. STIMSON RESEARCH PROGRAMS ARE AT THE FOREFRONT OF POLICY INNOVATION AND ARE STRONGLY COMMITTED TO EXCELLENCE AND INDEPENDENCE. OUR POLICY PROPOSALS AND ANALYSES ARE GROUNDED IN THE REAL WORLD, INFORMED BY EXPERIENCE, USED BY POLICYMAKERS, AND REFLECT OUR VALUES. STIMSON'S GLOBAL REACH AND LOCAL NETWORKS KEEP US IN TOUCH WITH THE RAPIDLY CHANGING INTERNATIONAL ENVIRONMENT. BUILD SOLUTIONS. OFTEN, UNDERSTANDING A PROBLEM AND MAKING RECOMMENDATIONS IS NOT ENOUGH. THAT IS WHY STIMSON TURNS GOOD IDEAS INTO REALITY BY FIELD-TESTING PROPOSALS AND SUPPORTING IMPLEMENTATIONS IN THE REAL WORLD. WE APPLY OUR RESEARCH IN NUMEROUS WAYS, FROM BUILDING TOOLS, PROTOTYPING NEW TECHNOLOGIES, AND CREATING DATASETS, TO WORKING WITH LOCAL LEADERS AND TRAINING GOVERNMENT OFFICIALS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 4A, PROGRAM SERVICE ACCOMPLISHMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRAND STRATEGY IN PIVOTAL PLACES - THE CENTER'S GRAND STRATEGY IN PIVOTAL PLACES PROGRAMS FOCUS ON THE SECURITY CHALLENGES CONFRONTING ASIA. COMBINING THE EXPERTISE OF REGIONAL SPECIALISTS AND FUNCTIONAL EXPERTS, THE RESEARCH AGENDA SPANS THE COUNTRIES OF THE INDO-PACIFIC. EXAMINING SECURITY IN ALL ITS DIMENSIONS, FROM STRATEGIC ISSUES TO MANAGING SECURITY AT THE NATIONAL LEVEL, THE PROGRAMS ALSO CONSIDER HUMAN SECURITY ISSUES THAT HAVE IMPORTANT IMPLICATIONS FOR POLITICAL STABILITY. THE CENTER ANALYSIS ALSO EXAMINES U.S. POLICIES IN THE REGION, THE POLICIES OF THE STATES IN THE AREA, AS WELL AS NONGOVERNMENTAL ORGANIZATION ("NGO") PERSPECTIVES AND THE VIEWS OF OTHER OUTSIDE ACTORS. PROJECT ACTIVITIES INCLUDE WORKSHOPS, FIELD RESEARCH, ANALYSIS, CONFERENCES, AND PUBLICATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 4B, PROGRAM SERVICE ACCOMPLISHMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROMOTING SECURITY AND PROSPERITY - FROM THE PROLIFERATION OF WEAPONS OF MASS DESTRUCTION AND ILLICIT TRAFFICKING, TO TERRORISM, COUNTERFEIT INTELLECTUAL PROPERTY, AND ENVIRONMENTAL CRIME - PROMOTING SECURITY AND PROSPERITY AIMS TO MITIGATE THE ACTIONS THAT THREATEN GEOSTRATEGIC STABILITY, PEOPLE, AND SOCIO-ECONOMIC DEVELOPMENT WORLDWIDE. THE CENTER DEVELOPS INNOVATIVE GOVERNMENT RESPONSES AT THE NATIONAL, REGIONAL, AND INTERNATIONAL LEVELS, AND ACCELERATES PUBLIC-PRIVATE PARTNERSHIPS TO MITIGATE THESE THREATS. THE CENTER'S WORK IN THIS AREA EXPLORES THE SECURITY, SAFEGUARDS, LAWS, REGULATORY FRAMEWORKS, AND INTERNATIONAL LAWS AND PRACTICES DESIGNED TO REDUCE THE RISK OF WEAPONIZED USE OF CHEMICAL, BIOLOGICAL, RADIOLOGICAL, AND NUCLEAR ("CBRN") MATERIALS; AND THE RULES AND TOOLS THAT REGULATE THE USE, CONTROL, AND TRADE OF TECHNOLOGIES AS WELL AS THE USE OF TECHNOLOGY TO INCREASE SECURITY, PROSPERITY, AND JUSTICE. THROUGH ITS ENGAGEMENT WITH VARIOUS STAKEHOLDERS, THE CENTER WORKS TO IDENTIFY THE ROOTS OF THREATS TO PEACE AND SECURITY AND PUT FORWARD INNOVATIVE AND NETWORKED SOLUTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 4C, PROGRAM SERVICE ACCOMPLISHMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROTECTING PEOPLE - FOCUSED ON PRAGMATIC STEPS TOWARD PROTECTING PEOPLE, THE CENTER PLACES A HIGH PRIORITY ON UNDERSTANDING AND STRENGTHENING THE CAPACITY OF THE INSTITUTIONS AND NETWORKS RESPONSIBLE FOR CARRYING OUT SECURITY POLICIES. CURRENT PROGRAMS EVALUATE AND SEEK TO ENHANCE THE NORMS, LAWS, AND INSTITUTIONS THAT SHAPE HOW STATES TREAT EACH OTHER, NON-STATE ACTORS, AND HUMAN BEINGS IN PEACE AND CONFLICT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE OF THE BOARD IS AUTHORIZED TO EXERCISE POWERS OF THE BOARD OF DIRECTORS THAT ARISE BETWEEN REGULARLY SCHEDULED BOARD MEETINGS OR WHEN IT IS NOT PRACTICAL OR FEASIBLE FOR THE BOARD TO MEET. THE EXECUTIVE COMMITTEE PRESENTS ALL OF ITS ACTIVITIES TO THE BOARD OF DIRECTORS FOR RATIFICATION AT THE NEXT MEETING OF THE BOARD. THE EXECUTIVE COMMITTEE CONSISTS ENTIRELY OF VOTING MEMBERS OF THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DIRECTOR OF FINANCE &amp; ADMINISTRATION REVIEWS THE 990 IN DETAIL FOR ACCURACY AND COMPLETENESS. THE DRAFT RETURN IS REVIEWED WITH AND APPROVED BY THE FULL BOARD. THE FINAL RETURN IS DISTRIBUTED TO THE FULL BOARD PRIOR TO SUBMISSION TO THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S POLICY AND PRACTICES FOR MONITORING PROPOSED AND/OR PERCEIVED CONFLICTS OF INTEREST ARE DETAILED IN THE ORGANIZATION'S CONFLICT OF INTEREST POLICY WHICH IS DISTRIBUTED TO ALL STAFF MEMBERS UPON HIRE AND NEW BOARD MEMBERS UPON APPOINTMENT. ALL STAFF AND THE BOARD ARE COVERED UNDER THIS POLICY AND POTENTIAL CONFLICTS OF INTEREST ARE REVIEWED BY THE CEO, OR, IF IT IS IN RELATION TO THE CEO, REVIEWED BY AN APPROPRIATE MEMBER OF THE BOARD EXECUTIVE COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PERFORMANCE OF KEY EMPLOYEES IS REVIEWED BY THEIR IMMEDIATE SUPERVISOR. PAY ADJUSTMENTS TYPICALLY INCLUDE A COLA WHICH FOLLOWS THE US GOVERNMENT COLA RATE FOR THE YEAR AND A VARIABLE MERIT AWARD. THE PERCENTAGE INCREASE FOR MERIT AWARD IS DETERMINED BY THE FINANCIAL POSITION OF THE ORGANIZATION AND TRENDS IN THE INDUSTRY. THE DIRECTOR OF FINANCE &amp; ADMINISTRATION MAKES COMPENSATION RATE RECOMMENDATIONS TO THE PRESIDENT &amp; CEO BASED ON THE FACTORS ABOVE, EQUITY AND MARKET COMPETITIVENESS. THE PRESIDENT &amp; CEO APPROVES ALL SALARY ADJUSTMENTS. THE CEO'S COMPENSATION IS SET BY THE BOARD OF DIRECTORS, BASED ON THE FINANCIAL POSITION OF THE ORGANIZATION AND BY COMPARING THE CENTER'S COMPENSATION RATE TO THE COMPETITOR CHIEF EXECUTIVE RATES AS AGGREGATED IN THIRD PARTY SALARY SURVEY STUDIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE NOT MADE AVAILABLE TO THE PUBLIC. THE CONFLICT OF INTEREST POLICY IS AVAILABLE ON THE ORGANIZATION'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSULTING: PROGRAM SERVICE EXPENSES 978,029. MANAGEMENT AND GENERAL EXPENSES 10,748. FUNDRAISING EXPENSES 16. TOTAL EXPENSES 988,793.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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</Return>