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        <PersonNm>MICHAEL P HUERTA</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <PersonNm>PAUL KAMINSKI</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <PersonNm>RICHARD D CLARKE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <PersonNm>SUSAN GORDON</PersonNm>
        <TitleTxt>VICE CHAIR</TitleTxt>
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        <PersonNm>YVETTE MELENDEZ</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <PersonNm>Beth D Meinert</PersonNm>
        <TitleTxt>SVP and GM, MITRE Public Sector (MPS)</TitleTxt>
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        <PersonNm>Dr Cedric Sims</PersonNm>
        <TitleTxt>SVP, Enterprise Innovation and Integration</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Dr Jay J Schnitzer</PersonNm>
        <TitleTxt>SVP, Chief Engineer Officer, Chief Medical Officer</TitleTxt>
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        <PersonNm>Dr Laurie Giandomenico</PersonNm>
        <TitleTxt>SVP,CHIEF ACCELERATION OFFICER - UNTIL DEC</TitleTxt>
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        <PersonNm>Julie Bowen</PersonNm>
        <TitleTxt>SVP,CLO,OPERATIONS &amp; OUTREACH</TitleTxt>
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        <PersonNm>Kathleen P Federico</PersonNm>
        <TitleTxt>SVP, CHIEF PEOPLE OFFICER - UNTIL AUG</TitleTxt>
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        <PersonNm>Keoki Jackson</PersonNm>
        <TitleTxt>SVP, GM of the MITRE National Security Sector (MNS)</TitleTxt>
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        <PersonNm>T Charles Clancy III</PersonNm>
        <TitleTxt>SVP, GM MITRE LABS, CTO</TitleTxt>
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        <PersonNm>Wilson Y Wang</PersonNm>
        <TitleTxt>SVP, CFO, TREASURER</TitleTxt>
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        <PersonNm>Austin Y Wang</PersonNm>
        <TitleTxt>VP, INTELLIGENCE CENTER</TitleTxt>
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        <PersonNm>Chris Fall</PersonNm>
        <TitleTxt>VP, APPLIED SCIENCES</TitleTxt>
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        <PersonNm>Deborah Youmans</PersonNm>
        <TitleTxt>VP, CHIEF INFORMATION OFFICER</TitleTxt>
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        <PersonNm>Douglas P Robbins</PersonNm>
        <TitleTxt>VP ENGINEERING &amp; PROTOTYPING</TitleTxt>
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        <PersonNm>Dr Eliahu H Niewood</PersonNm>
        <TitleTxt>VP AIR &amp; SPACE FORCES - UNTIL OCT</TitleTxt>
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        <PersonNm>Dr Gregory K Crawford</PersonNm>
        <TitleTxt>VP, Cross Cutting, Joint, Allies &amp; Partners</TitleTxt>
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        <PersonNm>Dr Kristina Buckley</PersonNm>
        <TitleTxt>VP AND DIRECTOR, CIT</TitleTxt>
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        <PersonNm>Katie A Schroth</PersonNm>
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        <PersonNm>Kevin B Toner</PersonNm>
        <TitleTxt>VP OF CGEM</TitleTxt>
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        <PersonNm>Kimberly Warren</PersonNm>
        <TitleTxt>VICE PRESIDENT - UNTIL MARCH</TitleTxt>
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        <PersonNm>Marin S Halper</PersonNm>
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        <PersonNm>Stephanie E Turner</PersonNm>
        <TitleTxt>VP, Diversity &amp; Chief Sustainability Officer</TitleTxt>
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        <PersonNm>Stephen Louis Ondra</PersonNm>
        <TitleTxt>VP, Health FFRDC</TitleTxt>
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        <PersonNm>Steven J Kirin</PersonNm>
        <TitleTxt>VP, CORPORATE OPERATIONS</TitleTxt>
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        <PersonNm>Wen Masters</PersonNm>
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        <PersonNm>Yosry A Barsoum</PersonNm>
        <TitleTxt>VP and Director, Center for Securing the Homeland (CSH)</TitleTxt>
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        <PersonNm>Carl G Bucy</PersonNm>
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        <PersonNm>Dr Gerry Gilbert</PersonNm>
        <TitleTxt>MITRE Fellow</TitleTxt>
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        <PersonNm>Jesus N Abelarde Jr</PersonNm>
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        <PersonNm>Tass Hudak II</PersonNm>
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        <PersonNm>Christina Orfanos</PersonNm>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Shawn Fagan</PersonNm>
        <TitleTxt>Systems Engineer, Japan</TitleTxt>
        <BaseCompensationFilingOrgAmt>126179</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>385397</OtherCompensationFilingOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>24844</NontaxableBenefitsFilingOrgAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Dr Gerry Gilbert</PersonNm>
        <TitleTxt>MITRE Fellow</TitleTxt>
        <BaseCompensationFilingOrgAmt>344659</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>163917</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>8033</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>38024</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Carl G Bucy</PersonNm>
        <TitleTxt>Systems Engineer, Japan</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jesus N Abelarde Jr</PersonNm>
        <TitleTxt>Systems Engineer, Japan</TitleTxt>
        <BaseCompensationFilingOrgAmt>206632</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>235445</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>22180</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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        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1a First-class or charter travel</FormAndLineReferenceDesc>
        <ExplanationTxt>14 TRUSTEES ARE REIMBURSED FOR THEIR ACTUAL TRAVEL EXPENSE. TRAVEL BY AIR IS REIMBURSED UP TO ONE CLASS ABOVE COACH WHERE THE PUBLISHED TOTAL FLIGHT TIME EXCEEDS TWO HOURS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4a Severance or change-of-control payment</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOLLOWING INDIVIDUALS RECEIVED SEVERANCE PAYMENTS: DR. JASON F. PROVIDAKES $1,178,100 KIMBERLY WARREN $365,576 DR. LAURIE GIANDOMENICO $893,234 CHRISTINA ORFANOS $376,416 KATHLEEN P. FEDERICO $857,065</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 5a Compensation contingent on revenues of the organization</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE TEAM PARTICIPATES IN AN ANNUAL INCENTIVE PLAN BASED UPON THE OVERALL GOALS OF THE ORGANIZATION AS SET FORTH BY THE BOARD OF TRUSTEES. ONE OF THE METRICS OF THIS PLAN IS THE GROSS REVENUE OF THE ORGANIZATION</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 7 Non-fixed payments</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICER COMPENSATION MAY INCLUDE AN "INCENTIVE" COMPONENT. WHETHER AND HOW MUCH INCENTIVE TO PAY IS WITHIN THE BOARD'S DISCRETION, SUBJECT TO PREDETERMINED (BY THE BOARD) LIMITS. THE COMPENSATION COMMITTEE RECOMMENDS INCENTIVE AMOUNTS BASED ON PREDETERMINED PERFORMANCE CRITERIA AND CONSULTATION WITH THE CEO. DETERMINATION OF THE CEO'S INCENTIVE IS MADE BY THE COMPENSATION COMMITTEE IN COLLABORATION WITH THE BOARD'S EXECUTIVE COMMITTEE. THE CEO DOES NOT PARTICIPATE IN BOARD DISCUSSIONS RELATIVE TO HIS INCENTIVE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part II, Column (B)</FormAndLineReferenceDesc>
        <ExplanationTxt>The amount reported in Part II Column (B)(iii) pertaining to a former Chief Executive Officer, Dr. Jason Providakes, reflects retention payments for two calendar years (2023 and 2024), severance, and benefits payout upon separation.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part II, Column (B)(iii)</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMOUNT REPORTED IN PART II COLUMN(B)(iii) PERTAINING TO FORMER CHIEF EXECUTIVE OFFICER, DR. JASON PROVIDAKES, REFLECTS RETENTION PAYMENTS FOR TWO CALENDAR YEARS (2023 AND 2024), SERVERANCE, AND BENEFITS PAYOUT UPON SEPARATION.</ExplanationTxt>
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        <TransactionDesc>EMPLOYMENT</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
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            <BusinessNameLine1Txt>Kelcey F Crawford</BusinessNameLine1Txt>
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        <RelationshipDescriptionTxt>Child of key employee</RelationshipDescriptionTxt>
        <TransactionAmt>186509</TransactionAmt>
        <TransactionDesc>EMPLOYMENT</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
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      <BusTrInvolveInterestedPrsnGrp>
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            <BusinessNameLine1Txt>Eric Providakes</BusinessNameLine1Txt>
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            <BusinessNameLine1Txt>Jessi Richardson</BusinessNameLine1Txt>
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        <TransactionDesc>EMPLOYMENT</TransactionDesc>
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            <BusinessNameLine1Txt>Julien Thiesfield</BusinessNameLine1Txt>
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          <BusinessName>
            <BusinessNameLine1Txt>Robert Paul S Inglis</BusinessNameLine1Txt>
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        <RelationshipDescriptionTxt>Child of Trustee</RelationshipDescriptionTxt>
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        <NoncashContributionsRptF990Amt>28360</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Market value</MethodOfDeterminingRevenuesTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d Description of other program services</FormAndLineReferenceDesc>
        <ExplanationTxt>(Expenses $ 5,685,847 including grants of $ 0)(Revenue $ 0) MITRE ENGENUITY CONDUCTS SCIENTIFIC RESEARCH IN THE PUBLIC INTEREST, PROVIDING COLLABORATIVE SOLUTIONS TO NATIONAL CHALLENGES THAT REQUIRE PRIVATE ORGANIZATIONS, AND INVESTORS IN A NON-COMPETITIVE SPACE. MITRE ENGENUITY FOCUSES ON SOLVING COMPLEX CHALLENGES BEYOND WHAT THE GOVERNMENT ALONE CAN ADDRESS BY ENGAGING PUBLIC AND PRIVATE STAKEHOLDERS AROUND THE ADVANCEMENT OF CRITICAL TECHNOLOGIES, SUCH CYBERSECURITY, 5G, ARTIFICIAL INTELLIGENCE, SEMICONDUCTORS, HEALTH IT, AND TRANSPORTATION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>UNDER MITRE'S BYLAWS, THE BOARD'S EXECUTIVE COMMITTEE IS AUTHORIZED TO EXERCISE ALL POWERS VESTED IN THE BOARD OF TRUSTEES DURING THE INTERVALS BETWEEN MEETINGS OF THE BOARD. MEMBERSHIP ON THE EXECUTIVE COMMITTEE IS DRAWN EXCLUSIVELY FROM THE BOARD OF TRUSTEES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 4 Significant changes to organizational documents</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MITRE CORPORATION BYLAWS WERE AMENDED AND RESTATED ON JULY 18, 2024 TO ESTABLISH AN AGE LIMIT BEYOND WHICH A TRUSTEE CANNOT SERVE ON THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>A DRAFT OF THE COMPLETED FORM 990 IS REVIEWED BY THE BOARD'S AUDIT COMMITTEE AND BY THE ORGANIZATION'S CHIEF FINANCIAL OFFICER AND SENIOR TAX MANAGER. A DRAFT OF PART VI OF THE FORM IS REVIEWED BY THE BOARD'S TRUSTEESHIP COMMITTEE. A FINAL DRAFT OF THE FORM IS DISTRIBUTED TO ALL MEMBERS OF THE ORGANIZATION'S GOVERNING BODY PRIOR TO ELECTRONIC FILING WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c Conflict of interest policy</FormAndLineReferenceDesc>
        <ExplanationTxt>TRUSTEES ANNUALLY SUBMIT IN WRITING FORMAL DISCLOSURE OF THEIR AFFILIATIONS AND OUTSIDE BUSINESS INTERESTS, INCLUDING SUBSTANTIAL FINANCIAL HOLDINGS. THE DISCLOSURES ARE REVIEWED BY THE ORGANIZATION'S GENERAL COUNSEL AND BY THE BOARD'S GOVERNANCE &amp; BOARD DEVELOPMENT COMMITTEE. IN THE EVENT THAT A POTENTIAL FOR CONFLICT IS DETECTED, THE GENERAL COUNSEL AND/OR TRUSTEESHIP COMMITTEE WILL SEEK TO RESOLVE THE CONFLICT DIRECTLY WITH THE TRUSTEE. THE AFFECTED TRUSTEE MAY BE ASKED TO RECUSE HIM/HERSELF FROM PARTICIPATION IN DISCUSSIONS OR DECISION MAKING THAT MAY SUGGEST A CONFLICT. TO PROVIDE COMPLETE TRANSPARENCY AND TO ENGAGE THE BOARD MORE DIRECTLY IN THE ASSESSMENT AND RESOLUTION OF POTENTIAL CONFLICTS OR THE APPEARANCE OF CONFLICT, TRUSTEE DISCLOSURES ARE CIRCULATED TO ALL MEMBERS OF MITRE'S GOVERNING BODY FOR THEIR REVIEW AND REFERENCE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a Process to establish compensation of top management official</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICER COMPENSATION IS APPROVED ANNUALLY BY THE ORGANIZATION'S GOVERNING BOARD BASED ON THE RECOMMENDATIONS OF ITS COMPENSATION COMMITTEE, WHICH IS COMPRISED OF FIVE INDEPENDENT TRUSTEES. THE COMMITTEE REVIEWS THE TOTAL COMPENSATION AND BENEFITS PACKAGES OF MITRE OFFICERS AND RECOMMENDS APPROPRIATE ADJUSTMENTS TO THE BOARD OF TRUSTEES IN CONSULTATION WITH MITRE CHIEF EXECUTIVE OFFICER. PRIOR TO MAKING ITS RECOMMENDATIONS, THE COMMITTEE CONSIDERS AND INTEGRATES MARKET FACTORS, AS WELL AS THE REASONABLENESS OF ACTIONS IN RELATION TO THE OVERALL ENVIRONMENT. THE COMMITTEE HAS DISCRETION TO RETAIN THE ASSISTANCE OF EXTERNAL CONSULTANTS WITH RESPECT TO THE MARKET COMPETITIVENESS OF MITRE'S OFFICER PAY LEVELS AND POLICIES. THE BOARD OF TRUSTEES HAS SOLE DISCRETION TO FINALIZE OFFICER PAY LEVELS, CONSIDERING THE RECOMMENDATIONS OF THE COMPENSATION COMMITTEE, ITS EXTERNAL CONSULTANTS, AND ANY OTHER FACTORS THEY DEEM RELEVANT. THE BOARD OF TRUSTEES, WITH THE RECOMMENDATIONS OF THE COMPENSATION COMMITTEE EVALUATES CEO PERFORMANCE AND COORDINATES WITH THE BOARD'S COMPENSATION COMMITTEE ON A RECOMMENDED CEO COMPENSATION PACKAGE. CONSISTENT WITH THE PROCESS APPLICABLE TO ALL OFFICERS, THE FULL BOARD OF TRUSTEES REVIEWS, DISCUSSES AND VOTES WHETHER TO APPROVE OR MODIFY THE COMPENSATION COMMITTEE'S RECOMMENDATIONS FOR CEO COMPENSATION. THE CEO DOES NOT PARTICIPATE IN EITHER THE COMMITTEE'S OR THE BOARD'S DISCUSSIONS OR DECISION MAKING PERTINENT TO HIS COMPENSATION. THE ABOVE-DESCRIBED PROCESS IS PERFORMED ANNUALLY. IT WAS LAST APPLIED TO EACH OFFICER IN SEPTEMBER-NOVEMBER 2024.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15b Process to establish compensation of other employees</FormAndLineReferenceDesc>
        <ExplanationTxt>SEE DISCLOSURE FOR PART VI, LINE 15A</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>MITRE MAKES ITS GOVERNING DOCUMENTS AVAILABLE TO THE PUBLIC ON REQUEST. MITRE DOES NOT MAKE AVAILABLE TO THE GENERAL PUBLIC ITS CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 1e FORM 990, PART VIII, LINE 1E (SCHEDULE A, PART II; SCHEDULE B, PART I)</FormAndLineReferenceDesc>
        <ExplanationTxt>MITRE OPERATES SEVERAL FEDERALLY FUNDED RESEARCH AND DEVELOPMENT CENTERS (FFRDCS) SPONSORED BY THE UNITED STATES GOVERNMENT. THROUGH THE FFRDCS, MITRE ACHIEVES ITS TAX-EXEMPT PURPOSE BY PERFORMING ON CONTRACTS THAT ARE EITHER FOR THE U.S. GOVERNMENT OR ARE APPROVED BY THE U.S. GOVERNMENT. AN FFRDC IS DESIGNED TO PERFORM ON PROJECTS INVOLVING RESEARCH THAT EXCEEDS NORMAL CAPABILITIES, WHILE OPERATING IN THE PUBLIC INTEREST. AS THE MISSION OF THE U.S. GOVERNMENT SPONSOR IS TO SERVE THE PUBLIC INTEREST, AND AS THE FFRDC IS STRUCTURED TO PROVIDE SERVICES THAT ARE INTEGRAL TO THE MISSION OF THE SPONSOR, THE FFRDC IS DESIGNED TO PROVIDE SERVICES IN THE PUBLIC INTEREST. ACCORDINGLY, BECAUSE THE PRIMARY PURPOSE OF THESE CONTRACTS IS TO ENABLE MITRE TO PROVIDE SERVICES TO THE PUBLIC RATHER THAN TO A GOVERNMENT AGENCY OR UNIT, AND BECAUSE THE PUBLIC RATHER THAN A GOVERNMENT AGENCY OR UNIT RECEIVES THE PRIMARY AND DIRECT BENEFIT FROM MITRE'S SERVICES, MITRE REPORTS THE REVENUE RELATED TO THE CONTRACTS AS CONTRIBUTIONS, OR GOVERNMENT GRANTS, ON PART VIII, LINE 1E, INSTEAD OF AS PROGRAM SERVICE REVENUE ON PART VIII, LINE 2.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9 Other changes in net assets or fund balances</FormAndLineReferenceDesc>
        <ExplanationTxt>POST RETIREMENT BENEFIT - UNREALIZED LOSS - -2794413; Total - -2794413;</ExplanationTxt>
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