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      <Desc>MARKET REGULATION: MSRB WAS ESTABLISHED BY CONGRESS TO REGULATE SECURITIES FIRMS, BANKS AND MUNICIPAL ADVISORS THAT TRANSACT IN MUNICIPAL SECURITIES AND ENGAGE IN MUNICIPAL ADVISORY ACTIVITIES (COLLECTIVELY "REGULATED ENTITIES") WITH THE GOAL OF PROTECTING INVESTORS, MUNICIPAL ENTITIES, OBLIGATED PERSONS, AND THE PUBLIC INTEREST. (CONTINUED ON SCHEDULE O)MSRB WORKS TO PROTECT INVESTORS AND ISSUERS BY CREATING FAIR, CLEAR, AND EFFECTIVE RULES FOR THE MUNICIPAL SECURITIES MARKET. ITS GOAL IS TO MAKE THE MARKET STRONGER AND MORE COMPETITIVE BY LEVELING THE PLAYING FIELD FOR MARKET PARTICIPANTS AND PROMOTING CAPITAL FORMATION. MSRB'S REGULATORY ACCOMPLISHMENTS IN FISCAL YEAR (FY) 2025 INCLUDE:-TRADE REPORTING: MSRB RESCINDED THE NOT YET EFFECTIVE AMENDMENTS TO RULE G-14 REQUIRING TRADES TO BE REPORTED WITHIN ONE MINUTE. MSRB RETAINED THE CURRENT 15-MINUTE REPORTING STANDARD AFTER DISCUSSION WITH MARKET PARTICIPANTS BUT AMENDED THE RULE TO REQUIRE DEALERS, BEGINNING IN JULY 2026, TO REPORT TRADES "AS SOON AS PRACTICABLE AND HAVE CLEAR POLICIES IN PLACE TO MEET THIS NEW REQUIREMENT.-MSRB ALSO MAINTAINED ITS FOCUS ON RETROSPECTIVE RULE REVIEWS TO ENSURE ITS RULES ARE ACHIEVING THEIR INTENDED PURPOSES AND DON'T CREATE UNNECESSARY BURDENS. MSRB LAUNCHED FIVE MAJOR REVIEWS OF EXISTING RULES:-ADAPTING DEALER SUPERVISION RULES TO THE MODERN WORKPLACE (RULE G-27)-STREAMLINING THE PRIMARY MARKET DISCLOSURE AND DATA SUBMISSION PROCESS (RULE G-32 AND RULE G-34)-UPDATING MUNICIPAL ADVISOR RULES; AND-MODERNIZING DISCLOSURE AND OTHER OBLIGATIONS FOR MUNICIPAL FUND SECURITIES</Desc>
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        <Desc>MARKET TRANSPARENCY: MSRB HELPS PROTECT AND IMPROVE THE MUNICIPAL SECURITIES MARKET BY RUNNING THE TECHNOLOGY INFRASTRUCTURE. AT THE CENTER OF THIS SYSTEM IS THE (EMMA) ELECTRONIC MUNICIPAL MARKET ACCESS WEBSITE AT EMMA.MSRB.ORG., WHICH GIVES ALL MUNICIPAL MARKET PARTICIPANTS AND THE PUBLIC ACCESS, FREE OF CHARGE, TO KEY MUNICIPAL SECURITIES DATA. (CONTINUED ON SCHEDULE O)IN 2025, MSRB CONTINUED TO INVEST IN A MAJOR REDESIGN OF ITS EMMA WEBSITE, SET TO LAUNCH IN 2026.THIS MULTI-YEAR PROJECT HAS INCLUDED STAKEHOLDER FEEDBACK FROM EMMA USERS THROUGHOUT THE PROCESS, INCLUDING MORE THAN 100 INDUSTRY EXPERTS AND MARKET PARTICIPANTS DURING BETA TESTING OVER THE LAST YEAR. THE NEW EMMA WILL OFFER A MODERN LOOK AND FEEL, EASIER NAVIGATION, A CUSTOMIZABLE DASHBOARD, ENHANCED SEARCH TOOLS, AND NEW DATA, INCLUDING OBLIGOR INFORMATION FOR THE FIRST TIME IN MSRB HISTORY.</Desc>
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        <ReportableCompFromOrgAmt>65000</ReportableCompFromOrgAmt>
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        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WENDELL GAERTNER</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>65000</ReportableCompFromOrgAmt>
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        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CHRIS KENDALL</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>6.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>65000</ReportableCompFromOrgAmt>
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        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>AHMED ABONAMAH</PersonNm>
        <TitleTxt>DIRECTOR (AS OF 10/2024)</TitleTxt>
        <AverageHoursPerWeekRt>6.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>16250</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DAN WILES</PersonNm>
        <TitleTxt>DIRECTOR (AS OF 10/2024)</TitleTxt>
        <AverageHoursPerWeekRt>6.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>16250</ReportableCompFromOrgAmt>
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        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HEATHER GRZANKA</PersonNm>
        <TitleTxt>DIRECTOR (AS OF 10/2024)</TitleTxt>
        <AverageHoursPerWeekRt>6.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MARK T KIM</PersonNm>
        <TitleTxt>PRESIDENT AND CEO</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>822742</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>OMER AHMED</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>65828</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RONALD SMITH</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>38189</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN A BAGLEY</PersonNm>
        <TitleTxt>CHIEF MARKET STRUCTURE OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromOrgAmt>559653</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>71274</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JACOB LESSER</PersonNm>
        <TitleTxt>GENERAL COUNSEL</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BRIAN ANTHONY</PersonNm>
        <TitleTxt>CHIEF PRODUCT OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromOrgAmt>479809</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>58557</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN TOYE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromOrgAmt>400662</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>59227</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TANGIE DAVIS</PersonNm>
        <TitleTxt>CHIEF OF STAFF</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
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        <OtherCompensationAmt>47296</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>IJEOMA LASEBIKAN</PersonNm>
        <TitleTxt>DIRECTOR, HUMAN RESOURCES</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>53320</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ERNESTO LANZA</PersonNm>
        <TitleTxt>CHIEF REGULATORY &amp; POLICY OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>506335</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>67092</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ALEIS STOKES AS OF 012024</PersonNm>
        <TitleTxt>CHIEF EXTERNAL RELATIONS OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>310354</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>61517</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SIMON WU</PersonNm>
        <TitleTxt>CHIEF ECONOMIST</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <OtherCompensationAmt>46729</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SALLY KLEMPERER</PersonNm>
        <TitleTxt>SENIOR ASSOCIATE GENERAL COUNSEL</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromOrgAmt>334439</ReportableCompFromOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MARCELO VIEIRA</PersonNm>
        <TitleTxt>SENIOR DIR, RESEARCH &amp; MRKT TRANSP.</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SHAMBREIA JOINER</PersonNm>
        <TitleTxt>SR. DIRECTOR, REGULATORY COMPL.</TitleTxt>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
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        <OtherCompensationAmt>42980</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>FRANK MAZZARELLI</PersonNm>
        <TitleTxt>DIRECTOR, MARKET REGULATION</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MEREDITH L HATHORN</PersonNm>
        <TitleTxt>FORMER DIRECTOR, BOARD CHAIR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <FormerOfcrDirectorTrusteeInd>X</FormerOfcrDirectorTrusteeInd>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ANGELIA SCHMIDT</PersonNm>
        <TitleTxt>FORMER DIRECTOR, BOARD VICE CHAIR</TitleTxt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>THALIA MEEHAN</PersonNm>
        <TitleTxt>FORMER DIRECTOR</TitleTxt>
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        <ReportableCompFromOrgAmt>48750</ReportableCompFromOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SARA MAJROH</PersonNm>
        <TitleTxt>FMR. OFF./SR. MGR., CORP. GOVERNANCE</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JESSICA FAUCETTE</PersonNm>
        <TitleTxt>FMR. OFF/SR. GOVT. &amp; PUBLIC AFF.</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>AMAZON WEB SERVICES INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>410 TERRY AVENUE NORTH</AddressLine1Txt>
            <CityNm>SEATTLE</CityNm>
            <StateAbbreviationCd>WA</StateAbbreviationCd>
            <ZIPCd>98109</ZIPCd>
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        <ServicesDesc>CLOUD SERVICE PROVIDER</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CC PACE SYSTEMS INC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>4100 MONUMENT CORNER DRIVE 400</AddressLine1Txt>
            <CityNm>FAIRFAX</CityNm>
            <StateAbbreviationCd>VA</StateAbbreviationCd>
            <ZIPCd>22030</ZIPCd>
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        <ServicesDesc>SOFTWARE DEVELOPMENT</ServicesDesc>
        <CompensationAmt>1590629</CompensationAmt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>ACCENTURE FEDERAL SERVICES</BusinessNameLine1Txt>
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          <USAddress>
            <AddressLine1Txt>800 N GLEBE RD 300</AddressLine1Txt>
            <CityNm>ARLINGTON</CityNm>
            <StateAbbreviationCd>VA</StateAbbreviationCd>
            <ZIPCd>22203</ZIPCd>
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        <ServicesDesc>SOFTWARE DEVELOPMENT</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CDW DIRECT LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>40 E RIO SALADO PKWY</AddressLine1Txt>
            <CityNm>CHICAGO</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
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        <ServicesDesc>SOFTWARE DEVELOPMENT</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>ICE DATA PRICING AND REFERENCE DATA LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1521 CONCORD PIKE 201</AddressLine1Txt>
            <CityNm>WILMINGTON</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
            <ZIPCd>19803</ZIPCd>
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        <Desc>DATA SUBSCRIPTIONS</Desc>
        <BusinessCd>900099</BusinessCd>
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        <Desc>RULE VIOLATION FNE REV</Desc>
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      <ProgramServiceRevenueGrp>
        <Desc>PRO. QUAL. EXAM FEES</Desc>
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        <TotalRevenueColumnAmt>1683914</TotalRevenueColumnAmt>
        <ExclusionAmt>1683914</ExclusionAmt>
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        <SecuritiesAmt>15389</SecuritiesAmt>
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        <SecuritiesAmt>15389</SecuritiesAmt>
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      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>-113857</TotalRevenueColumnAmt>
        <ExclusionAmt>-113857</ExclusionAmt>
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        <Desc>OTHER INCOME</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>80520</TotalRevenueColumnAmt>
        <ExclusionAmt>80520</ExclusionAmt>
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        <TotalAmt>400218</TotalAmt>
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        <TotalAmt>1413440</TotalAmt>
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      <FeesForServicesLegalGrp>
        <TotalAmt>600533</TotalAmt>
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      <FeesForServicesAccountingGrp>
        <TotalAmt>516890</TotalAmt>
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      <FeesForServicesLobbyingGrp>
        <TotalAmt>38513</TotalAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>3532855</TotalAmt>
      </FeesForServicesOtherGrp>
      <OfficeExpensesGrp>
        <TotalAmt>490701</TotalAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>7288826</TotalAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>2264459</TotalAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>403660</TotalAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>273045</TotalAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>74</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>3023524</TotalAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>352185</TotalAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>ELECTRONIC INFORMATION</Desc>
        <TotalAmt>1361234</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>DUES, REGIS., TRAIN.</Desc>
        <TotalAmt>149641</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SUBSCRIPTION &amp; PUBLI.</Desc>
        <TotalAmt>120577</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>TEMP CLERICAL ASSIST</Desc>
        <TotalAmt>14370</TotalAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>315370</TotalAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>49653681</TotalAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>1107904</BOYAmt>
        <EOYAmt>1460118</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>10428429</BOYAmt>
        <EOYAmt>12144179</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>8656105</BOYAmt>
        <EOYAmt>8939029</EOYAmt>
      </AccountsReceivableGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>2276125</BOYAmt>
        <EOYAmt>2264219</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>64216564</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>45702171</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>18214981</BOYAmt>
        <EOYAmt>18514393</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>36907646</BOYAmt>
        <EOYAmt>48412903</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>6473953</BOYAmt>
        <EOYAmt>5758825</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>84065143</BOYAmt>
        <EOYAmt>97493666</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>5907638</BOYAmt>
        <EOYAmt>5679260</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>336070</BOYAmt>
        <EOYAmt>390385</EOYAmt>
      </DeferredRevenueGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>10811822</BOYAmt>
        <EOYAmt>9564370</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>17055530</BOYAmt>
        <EOYAmt>15634015</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>67009613</BOYAmt>
        <EOYAmt>81859651</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>67009613</BOYAmt>
        <EOYAmt>81859651</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>84065143</BOYAmt>
        <EOYAmt>97493666</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>14453993</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>396045</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="RetDoc1039600001">
      <TotalGrassrootsLobbyingGrp>
        <AffiliatedGroupTotalAmt>0</AffiliatedGroupTotalAmt>
      </TotalGrassrootsLobbyingGrp>
      <TotalDirectLobbyingGrp>
        <AffiliatedGroupTotalAmt>0</AffiliatedGroupTotalAmt>
      </TotalDirectLobbyingGrp>
      <OtherExemptPurposeExpendGrp>
        <AffiliatedGroupTotalAmt>0</AffiliatedGroupTotalAmt>
      </OtherExemptPurposeExpendGrp>
      <SubstantiallyAllDuesNondedInd>0</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>0</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>0</AgreeCarryoverPriorYearInd>
      <DuesAssessmentsAmt>58893518</DuesAssessmentsAmt>
      <NonDeductibleLbbyngPltclCYAmt>38513</NonDeductibleLbbyngPltclCYAmt>
      <NonDeductibleLbbyngPltclTotAmt>38513</NonDeductibleLbbyngPltclTotAmt>
      <TaxableAmt>38513</TaxableAmt>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>4455824</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>2869707</DepreciationAmt>
        <BookValueAmt>1586117</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>1604994</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1411511</DepreciationAmt>
        <BookValueAmt>193483</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>58155746</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>41420953</DepreciationAmt>
        <BookValueAmt>16734793</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>18514393</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <Desc>OPERATING LEASE ROU ASSET</Desc>
        <BookValueAmt>5758825</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>5758825</TotalBookValueOtherAssetsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>CAPITAL LEASE LIABILITY</Desc>
        <Amt>97</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>OPERATING LEASE LIABILITY</Desc>
        <Amt>9564273</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>9564370</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>64619125</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>396045</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>396045</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>64223080</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>13839</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>-129245</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>-115406</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>64107674</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>49769087</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>129245</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>129245</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>49639842</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>13839</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>13839</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>49653681</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FIN 48 (ASC 740) MSRB FOLLOWS GUIDANCE THAT CLARIFIES THE ACCOUNTING FOR UNCERTAINTY IN TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN, INCLUDING ISSUES RELATING TO FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT. THIS GUIDANCE PROVIDES THAT THE TAX EFFECTS FROM AN UNCERTAIN TAX POSITION CAN ONLY BE RECOGNIZED IN THE FINANCIAL STATEMENTS IF THE POSITION IS "MORE-LIKELY-THAN NOT" TO BE SUSTAINED IF THE POSITION WERE TO BE CHALLENGED BY A TAXING AUTHORITY. THE ASSESSMENT OF THE TAX POSITION IS BASED SOLELY ON THE TECHNICAL MERITS OF THE POSITION, WITHOUT REGARD TO THE LIKELIHOOD THAT THE TAX POSITION MAY BE CHALLENGED. MSRB IS EXEMPT FROM FEDERAL INCOME TAX UNDER IRC SECTION 501(C)(6), THOUGH IT IS SUBJECT TO TAX ON INCOME UNRELATED TO ITS EXEMPT PURPOSE, UNLESS THAT INCOME IS OTHERWISE EXCLUDED BY THE CODE. MSRB HAS PROCESSES PRESENTLY IN PLACE TO ENSURE THE MAINTENANCE OF ITS TAX-EXEMPT STATUS; TO IDENTIFY AND REPORT UNRELATED INCOME; TO DETERMINE ITS FILING AND TAX OBLIGATIONS IN JURISDICTIONS FOR WHICH IT HAS NEXUS; AND TO IDENTIFY AND EVALUATE OTHER MATTERS THAT MAY BE CONSIDERED TAX POSITIONS. MSRB HAS DETERMINED THAT THERE ARE NO MATERIAL UNCERTAIN TAX POSITIONS THAT REQUIRE RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>LOSS FROM SALE OF ASSETS -129,245.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>LOSS FROM SALE OF ASSETS 129,245.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <FirstClassOrCharterTravelInd>X</FirstClassOrCharterTravelInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <IndependentConsultantInd>X</IndependentConsultantInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARK T KIM</PersonNm>
        <TitleTxt>PRESIDENT AND CEO</TitleTxt>
        <BaseCompensationFilingOrgAmt>657157</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>165375</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>210</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>29269</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>40924</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>892935</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JOHN A BAGLEY</PersonNm>
        <TitleTxt>CHIEF MARKET STRUCTURE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>464603</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>95000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>50</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>31050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>40224</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>630927</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ERNESTO LANZA</PersonNm>
        <TitleTxt>CHIEF REGULATORY &amp; POLICY OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>420230</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>86000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>105</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>31050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>36042</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>573427</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JACOB LESSER</PersonNm>
        <TitleTxt>GENERAL COUNSEL</TitleTxt>
        <BaseCompensationFilingOrgAmt>432514</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>106300</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>26456</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>2910</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>568180</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRIAN ANTHONY</PersonNm>
        <TitleTxt>CHIEF PRODUCT OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>399659</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>80000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>150</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>25600</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>32957</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>538366</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JOHN TOYE</PersonNm>
        <TitleTxt>CHIEF INFORMATION OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>319212</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>81300</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>150</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>31050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>28177</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>459889</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>TANGIE DAVIS</PersonNm>
        <TitleTxt>CHIEF OF STAFF</TitleTxt>
        <BaseCompensationFilingOrgAmt>330467</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>56300</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>235</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>31050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16246</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>434298</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SIMON WU</PersonNm>
        <TitleTxt>CHIEF ECONOMIST</TitleTxt>
        <BaseCompensationFilingOrgAmt>309272</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>38700</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>200</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>31050</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>15679</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>394901</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SALLY KLEMPERER</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>36900</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>345</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>30129</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>15187</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>379755</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ALEIS STOKES AS OF 012024</PersonNm>
        <TitleTxt>CHIEF EXTERNAL RELATIONS OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>255354</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>55000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>22831</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>38686</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>371871</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>OMER AHMED</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>289079</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>15000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28350</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>37478</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>369907</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>FRANK MAZZARELLI</PersonNm>
        <TitleTxt>DIRECTOR, MARKET REGULATION</TitleTxt>
        <BaseCompensationFilingOrgAmt>261925</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>27000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>150</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>20928</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>36610</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>346613</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MARCELO VIEIRA</PersonNm>
        <TitleTxt>SENIOR DIR, RESEARCH &amp; MRKT TRANSP.</TitleTxt>
        <BaseCompensationFilingOrgAmt>278318</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>34400</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>200</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>28078</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>4715</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>345711</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SHAMBREIA JOINER</PersonNm>
        <TitleTxt>SR. DIRECTOR, REGULATORY COMPL.</TitleTxt>
        <BaseCompensationFilingOrgAmt>260973</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>25900</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>26259</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16721</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>329853</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>RONALD SMITH</PersonNm>
        <TitleTxt>CORPORATE SECRETARY</TitleTxt>
        <BaseCompensationFilingOrgAmt>243986</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>30100</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>50</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>24567</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>13622</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>312325</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>IJEOMA LASEBIKAN</PersonNm>
        <TitleTxt>DIRECTOR, HUMAN RESOURCES</TitleTxt>
        <BaseCompensationFilingOrgAmt>169744</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>26300</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>50</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>18584</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>34736</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>249414</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SARA MAJROH</PersonNm>
        <TitleTxt>FMR. OFF./SR. MGR., CORP. GOVERNANCE</TitleTxt>
        <BaseCompensationFilingOrgAmt>192891</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>16400</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>100</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>18955</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>11587</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>239933</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JESSICA FAUCETTE</PersonNm>
        <TitleTxt>FMR. OFF/SR. GOVT. &amp; PUBLIC AFF.</TitleTxt>
        <BaseCompensationFilingOrgAmt>109276</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>7300</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>315</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>10832</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>17042</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>144765</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MEREDITH L HATHORN</PersonNm>
        <TitleTxt>FORMER DIRECTOR, BOARD CHAIR</TitleTxt>
        <BaseCompensationFilingOrgAmt>78750</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>78750</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANGELIA SCHMIDT</PersonNm>
        <TitleTxt>FORMER DIRECTOR, BOARD VICE CHAIR</TitleTxt>
        <BaseCompensationFilingOrgAmt>60000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>60000</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>THALIA MEEHAN</PersonNm>
        <TitleTxt>FORMER DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>48750</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>48750</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>ADDITIONAL BENEFITS PROVIDED: THE MSRB REIMBURSES BOARD MEMBERS, THE CHIEF EXECUTIVE OFFICER, AND ALL OTHER EMPLOYEES FOR THE COST OF COACH CLASS AIR TRAVEL FOR FLIGHTS OF 3 HOURS OR LESS IN TOTAL ONE-WAY TRIP DURATION. FOR AIR TRAVEL MORE THAN 3 HOURS IN TOTAL ONE-WAY TRIP DURATION, THE MSRB REIMBURSES BOARD MEMBERS FOR THE USE OF BUSINESS CLASS WHEN AVAILABLE, OR IF ONLY TWO CLASSES OF SERVICE ARE OFFERED, FIRST CLASS. THE MSRB HAS DETERMINED THIS MEETS THE BUSINESS REQUIREMENT STANDARD FOR NOT TREATING THE BENEFIT AS COMPENSATORY ON THE FORM W-2 OR 1099.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>DECISIONS REQUIRING APPROVAL BY MEMBERS OR STOCKHOLDERS: ALL PROPOSED RULE CHANGES ADOPTED BY THE BOARD OF DIRECTORS OF THE MSRB MUST BE APPROVED BY THE SECURITIES AND EXCHANGE COMMISSION PRIOR TO EFFECTIVENESS, UNLESS OTHERWISE ALLOWED BY LAW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>REVIEW OF FORM 990 PROCESS: THE BOARD OF DIRECTORS OF THE MSRB HAS AN AUDIT AND RISK COMMITTEE THAT IS CHARGED WITH REVIEWING THE ORGANIZATION'S COMPLETED FORM ANNUALLY PRIOR TO THE FILING OF SUCH FORM AND REPORTING ANY FINDINGS OR CONCLUSIONS TO THE BOARD OF DIRECTORS IN CONNECTION WITH THE COMMITTEE'S REVIEW OF SUCH FORM. THE AUDIT AND RISK COMMITTEE CONDUCTED ITS REVIEW ON 04/20/2026 AND THE BOARD OF DIRECTORS CONDUCTED ITS REVIEW ON 07/22/2026.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MSRB MAINTAINS CONFLICTS OF INTEREST, CODE OF CONDUCT, AND WHISTLEBLOWER POLICIES FOR ITS BOARD AND STAFF. ALL BOARD MEMBERS AND STAFF ARE TRAINED ANNUALLY ON THESE POLICIES AND MUST SIGN VARIOUS ACKNOWLEDGMENTS. THE MSRB REQUIRES OFFICERS, DIRECTORS AND KEY EMPLOYEES TO DISCLOSE ANNUALLY INTERESTS THAT COULD GIVE RISE TO CONFLICTS, AND SUBSEQUENTLY DISCLOSE UPDATES. IN CONNECTION WITH THE ELECTION OF NEW MEMBERS OF THE BOARD OF DIRECTORS, EACH CANDIDATE PROVIDES INFORMATION TO THE MSRB CONCERNING POTENTIAL CONFLICTS OF INTEREST. IN ADDITION, CERTAIN POTENTIAL CONFLICTS ARE EFFECTIVELY PROHIBITED UNDER SECTION 15B(B) OF THE SECURITIES EXCHANGE ACT OF 1934 DUE TO THE STATUTORY REQUIREMENTS REGARDING QUALIFICATION FOR MEMBERSHIP ON THE BOARD OF DIRECTORS. IN PARTICULAR, PUBLIC REPRESENTATIVES MUST BE INDEPENDENT OF ANY MUNICIPAL SECURITIES BROKER, MUNICIPAL SECURITIES DEALER OR MUNICIPAL ADVISOR. MSRB RULE A-3 DEFINES "INDEPENDENT" AS HAVING NO MATERIAL BUSINESS RELATIONSHIP WITH ANY MUNICIPAL SECURITIES BROKER, MUNICIPAL SECURITIES DEALER OR MUNICIPAL ADVISOR, INCLUDING AT A MINIMUM NOT CURRENTLY OR AT ANY TIME WITHIN THE LAST FIVE YEARS BEING ASSOCIATED WITH A MUNICIPAL SECURITIES BROKER, MUNICIPAL SECURITIES DEALER OR MUNICIPAL ADVISOR AND NOT HAVING A RELATIONSHIP WITH ANY MUNICIPAL SECURITIES BROKER, MUNICIPAL SECURITIES DEALER OR MUNICIPAL ADVISOR, WHETHER COMPENSATORY OR OTHERWISE, THAT REASONABLY COULD AFFECT THE INDEPENDENT JUDGMENT OR DECISION MAKING OF THE INDIVIDUAL. THE MSRB'S GENERAL COUNSEL REVIEWS THE DIRECTOR'S CONFLICTS OF INTEREST ACKNOWLEDGEMENT AND DISCLOSURE FORMS AND DETERMINES WHAT ACTIONS, IF ANY, NEED TO BE TAKEN, INCLUDING ASKING A BOARD MEMBER TO RECUSE HIM OR HERSELF FROM DELIBERATIONS OR VOTING ON AN ACTION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>PROCESS OF DETERMINING COMPENSATION: UNDER THE MSRB WRITTEN COMPENSATION STRATEGY, THE FINANCE COMMITTEE (COMPRISED OF MEMBERS OF THE BOARD OF DIRECTORS) IS RESPONSIBLE FOR MAKING RECOMMENDATIONS AND THE BOARD OF DIRECTORS IS RESPONSIBLE FOR APPROVING THE ORGANIZATION-WIDE COMPENSATION STRATEGY. THE ANNUAL SALARY BUDGET IS APPROVED BY THE BOARD OF DIRECTORS. AT LEAST ONCE EVERY FOUR YEARS, THE COMPENSATION STRATEGY IS REVIEWED BY THE FINANCE COMMITTEE. SUCH REVIEW WAS COMPLETED AND CHANGES WERE APPROVED BY THE BOARD IN 2024 WITH THE NEXT REVIEW WITHIN AT LEAST EVERY FOUR YEARS BY 2028. THE STEERING COMMITTEE (COMPRISED OF MEMBERS OF THE BOARD OF DIRECTORS) IS RESPONSIBLE FOR CONDUCTING AN ANNUAL REVIEW OF THE PERFORMANCE AND COMPENSATION OF THE CEO. TO DO SO, THE STEERING COMMITTEE OBTAINS FROM AN EXECUTIVE COMPENSATION CONSULTANT ANNUALLY A CEO COMPENSATION TRENDS REPORT FOR PEER GROUP ORGANIZATIONS OF THE MSRB. AT LEAST EVERY THREE YEARS, IN LIEU OF THE COMPENSATION TRENDS REPORT, THE STEERING COMMITTEE ENGAGES AN EXECUTIVE COMPENSATION CONSULTANT TO CONDUCT A MARKET ANALYSIS OF THE CEO'S COMPENSATION. THE FULL BOARD APPROVES THE COMPENSATION OF THE CEO, AND THE CEO ESTABLISHES THE COMPENSATION OF THE KEY EMPLOYEES WITHIN THE PARAMETERS AND PHILOSOPHY OF THE APPROVED COMPENSATION STRATEGY. ADDITIONALLY, THE CEO ANNUALLY PROVIDES TO THE BOARD THE SALARY, BENEFITS, AND TOTAL COMPENSATION OF THE SENIOR MANAGEMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>DOCUMENTS AVAILABLE TO THE PUBLIC: THE ORGANIZATION'S WEBSITE (WWW.MSRB.ORG) CONTAINS THE FOLLOWING: SECURITIES EXCHANGE ACT OF 1934 SECTION 15B (STATUTE CREATING THE MSRB), ARTICLES OF INCORPORATION, BY-LAWS, GOVERNANCE-RELATED ADMINISTRATIVE RULES, BOARD COMMITTEE CHARTERS, CODE OF ETHICS AND BUSINESS CONDUCT, CONFLICTS OF INTEREST POLICY, RISK MANAGEMENT PROGRAM, WHISTLEBLOWER AND NON-RETALIATION POLICY AND REPORT HANDLING PROCEDURES, AUDITED FINANCIAL STATEMENTS, ANNUAL BUDGET, MOST RECENT IRS FORM 990 AND CERTAIN FINANCIAL POLICIES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>