<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns="http://www.sec.gov/edgar/ncen">
  <schemaVersion>X0505</schemaVersion>
  <headerData>
    <submissionType>N-CEN</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0000746458</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      <flags>
        <overrideInternetFlag>false</overrideInternetFlag>
        <confirmingCopyFlag>false</confirmingCopyFlag>
      </flags>
      <investmentCompanyType>N-1A</investmentCompanyType>
    </filerInfo>
    <seriesClass>
      <reportSeriesClass>
        <rptSeriesClassInfo>
          <seriesId>S000006471</seriesId>
          <classInfo>
            <classId>C000017685</classId>
          </classInfo>
          <classInfo>
            <classId>C000088012</classId>
          </classInfo>
          <classInfo>
            <classId>C000189766</classId>
          </classInfo>
          <classInfo>
            <classId>C000017686</classId>
          </classInfo>
          <classInfo>
            <classId>C000017688</classId>
          </classInfo>
        </rptSeriesClassInfo>
        <rptSeriesClassInfo>
          <seriesId>S000006472</seriesId>
          <classInfo>
            <classId>C000017689</classId>
          </classInfo>
          <classInfo>
            <classId>C000017691</classId>
          </classInfo>
          <classInfo>
            <classId>C000189767</classId>
          </classInfo>
          <classInfo>
            <classId>C000088013</classId>
          </classInfo>
          <classInfo>
            <classId>C000088014</classId>
          </classInfo>
        </rptSeriesClassInfo>
        <rptSeriesClassInfo>
          <seriesId>S000006473</seriesId>
          <classInfo>
            <classId>C000017692</classId>
          </classInfo>
        </rptSeriesClassInfo>
      </reportSeriesClass>
    </seriesClass>
  </headerData>
  <formData>
    <generalInfo reportEndingPeriod="2026-05-31" isReportPeriodLt12="N"/>
    <registrantInfo>
      <registrantFullName>AMERICAN CENTURY MUNICIPAL TRUST </registrantFullName>
      <investmentCompFileNo>811-04025</investmentCompFileNo>
      <registrantCik>0000746458</registrantCik>
      <registrantLei>549300LWE02C3N77TY25</registrantLei>
      <registrantstreet1>4500 Main Street</registrantstreet1>
      <registrantcity>Kansas City</registrantcity>
      <registrantzipCode>64111</registrantzipCode>
      <registrantstate>US-MO</registrantstate>
      <registrantcountry>US</registrantcountry>
      <registrantphoneNumber>8165315575</registrantphoneNumber>
      <websites>
        <website webpage="www.americancentury.com"/>
      </websites>
      <locationBooksRecords>
        <locationBooksRecord>
          <officeName>State Street Bank and Trust Company</officeName>
          <officeAddress1>State Street Financial Center</officeAddress1>
          <officeAddress2>One Lincoln Street</officeAddress2>
          <officeCity>Boston</officeCity>
          <officeStateCountry officeState="US-MA" officeCountry="US"/>
          <officeRecordsZipCode>02111</officeRecordsZipCode>
          <officePhone>6177863000</officePhone>
          <booksRecordsDesc>Records relating to custody of fund assets and fund accounting</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>JPMorgan Chase Bank</officeName>
          <officeAddress1>4 Metro Tech Center</officeAddress1>
          <officeCity>Brooklyn</officeCity>
          <officeStateCountry officeState="US-NY" officeCountry="US"/>
          <officeRecordsZipCode>11245</officeRecordsZipCode>
          <officePhone>2122706000</officePhone>
          <booksRecordsDesc>Records relating to custody of fund assets and fund accounting</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>American Century Investment Management, Inc.</officeName>
          <officeAddress1>4500 Main Street</officeAddress1>
          <officeCity>Kansas City</officeCity>
          <officeStateCountry officeState="US-MO" officeCountry="US"/>
          <officeRecordsZipCode>64111</officeRecordsZipCode>
          <officePhone>8165315575</officePhone>
          <booksRecordsDesc>Records related to day-to-day portfolio management; sales literature</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>American Century Investment Management, Inc.</officeName>
          <officeAddress1>3945 Freedom Circle</officeAddress1>
          <officeAddress2>Ste 800</officeAddress2>
          <officeCity>Santa Clara</officeCity>
          <officeStateCountry officeState="US-CA" officeCountry="US"/>
          <officeRecordsZipCode>95054</officeRecordsZipCode>
          <officePhone>8165315575</officePhone>
          <booksRecordsDesc>Records related to day-to-day portfolio management; sales literature</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>American Century Services, LLC</officeName>
          <officeAddress1>4500 Main Street</officeAddress1>
          <officeCity>Kansas City</officeCity>
          <officeStateCountry officeState="US-MO" officeCountry="US"/>
          <officeRecordsZipCode>64111</officeRecordsZipCode>
          <officePhone>8165315575</officePhone>
          <booksRecordsDesc>Corporate, governance, financial, and legal records; sales literature</booksRecordsDesc>
        </locationBooksRecord>
      </locationBooksRecords>
      <isRegistrantFirstFiling>N</isRegistrantFirstFiling>
      <isRegistrantLastFiling>N</isRegistrantLastFiling>
      <registrantFamilyInvComp isRegistrantFamilyInvComp="Y" familyInvCompFullName="American Century Investments"/>
      <registrantClassificationType>N-1A</registrantClassificationType>
      <totalSeries>3</totalSeries>
      <isSecuritiesActRegistration>Y</isSecuritiesActRegistration>
      <directors>
        <director>
          <directorName>Tanya S. Beder</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>Jeremy I. Bulow</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
            <fileNumberInfo fileNumber="811-23305"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>Anne Casscells</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>Jennifer Cabalquinto</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>Jonathan D. Levin</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>John M. Loder</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04025"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
          </fileNumbers>
        </director>
        <director>
          <directorName>Jonathan S. Thomas</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>Y</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-05447"/>
            <fileNumberInfo fileNumber="811-10155"/>
            <fileNumberInfo fileNumber="811-03706"/>
            <fileNumberInfo fileNumber="811-07822"/>
            <fileNumberInfo fileNumber="811-04363"/>
            <fileNumberInfo fileNumber="811-04165"/>
            <fileNumberInfo fileNumber="811-06441"/>
            <fileNumberInfo fileNumber="811-21591"/>
            <fileNumberInfo fileNumber="811-07820"/>
            <fileNumberInfo fileNumber="811-21861"/>
            <fileNumberInfo fileNumber="811-00816"/>
            <fileNumberInfo fileNumber="811-08532"/>
            <fileNumberInfo fileNumber="811-05188"/>
            <fileNumberInfo fileNumber="811-06247"/>
            <fileNumberInfo fileNumber="811-23305"/>
          </fileNumbers>
        </director>
      </directors>
      <chiefComplianceOfficers>
        <chiefComplianceOfficer>
          <ccoName>Amy D. Shelton</ccoName>
          <crdNumber>002556023</crdNumber>
          <ccoStreet1>4500 Main Street</ccoStreet1>
          <ccoCity>Kansas City</ccoCity>
          <ccoStateCountry ccoState="US-MO" ccoCountry="US"/>
          <ccoZipCode>64111</ccoZipCode>
          <ccoPhone>XXXXXX</ccoPhone>
          <isCcoChangedSinceLastFiling>N</isCcoChangedSinceLastFiling>
          <ccoEmployers>
            <ccoEmployer ccoEmployerName="N/A" ccoEmployerId="N/A"/>
          </ccoEmployers>
        </chiefComplianceOfficer>
      </chiefComplianceOfficers>
      <isRegistrantSubmittedMatter>N</isRegistrantSubmittedMatter>
      <isPreviousLegalProceeding>N</isPreviousLegalProceeding>
      <isPreviousProceedingTerminated>N</isPreviousProceedingTerminated>
      <isClaimFiled>N</isClaimFiled>
      <coveredByInsurancePolicy isCoveredByInsurancePolicy="Y" isClaimFiledDuringPeriod="N"/>
      <isFinancialSupportDuringPeriod>N</isFinancialSupportDuringPeriod>
      <releaseNumbers isExemptionFromAct="Y">
        <releaseNumberInfo releaseNumber="IC-22209 "/>
        <releaseNumberInfo releaseNumber="IC-32833"/>
      </releaseNumbers>
      <principalUnderwriters>
        <principalUnderwriter>
          <principalUnderwriterName>American Century Investment Services, Inc.</principalUnderwriterName>
          <principalUnderwriterFileNumber>8-35220</principalUnderwriterFileNumber>
          <principalUnderwriterCrdNumber>000017437</principalUnderwriterCrdNumber>
          <principalUnderwriterLei>N/A</principalUnderwriterLei>
          <principalUnderwriterRssdId>N/A</principalUnderwriterRssdId>
          <principalUnderWriterStateCountry principalUnderWriterState="US-MO" principalUnderWriterCountry="US"/>
          <isPrincipalUnderwriterAffiliatedWithRegistrant>Y</isPrincipalUnderwriterAffiliatedWithRegistrant>
        </principalUnderwriter>
      </principalUnderwriters>
      <isUnderwriterHiredOrTerminated>N</isUnderwriterHiredOrTerminated>
      <publicAccountants>
        <publicAccountant>
          <publicAccountantName>Deloitte and Touche LLP</publicAccountantName>
          <pcaobNumber>00034</pcaobNumber>
          <publicAccountantLei>N/A</publicAccountantLei>
          <publicAccountantRssdId>N/A</publicAccountantRssdId>
          <publicAccountantStateCountry publicAccountantState="US-MO" publicAccountantCountry="US"/>
        </publicAccountant>
      </publicAccountants>
      <isPublicAccountantChanged>N</isPublicAccountantChanged>
      <isMaterialWeakness>N</isMaterialWeakness>
      <isOpinionOffered>N</isOpinionOffered>
      <isMaterialChange>N</isMaterialChange>
      <isAccountingPrincipleChange>N</isAccountingPrincipleChange>
      <isPaymentErrorInNetAssetValue>N</isPaymentErrorInNetAssetValue>
      <isPaymentDividend>N</isPaymentDividend>
    </registrantInfo>
    <managementInvestmentQuestionSeriesInfo>
      <managementInvestmentQuestion>
        <mgmtInvFundName>High-Yield Municipal Fund</mgmtInvFundName>
        <mgmtInvSeriesId>S000006471</mgmtInvSeriesId>
        <mgmtInvLei>Y17UIXB580PSZBYV3P36</mgmtInvLei>
        <isFirstFilingByFund>N</isFirstFilingByFund>
        <numAuthorizedClass>5</numAuthorizedClass>
        <numAddedClass>0</numAddedClass>
        <numTerminatedClass>0</numTerminatedClass>
        <sharesOutstandings>
          <sharesOutstanding sharesOutstandingClassName="Investor Class" sharesOutstandingClassId="C000017685" sharesOutstandingTickerSymbol="ABHYX"/>
          <sharesOutstanding sharesOutstandingClassName="I Class" sharesOutstandingClassId="C000088012" sharesOutstandingTickerSymbol="AYMIX"/>
          <sharesOutstanding sharesOutstandingClassName="Y Class" sharesOutstandingClassId="C000189766" sharesOutstandingTickerSymbol="AYMYX"/>
          <sharesOutstanding sharesOutstandingClassName="A Class" sharesOutstandingClassId="C000017686" sharesOutstandingTickerSymbol="AYMAX"/>
          <sharesOutstanding sharesOutstandingClassName="C Class" sharesOutstandingClassId="C000017688" sharesOutstandingTickerSymbol="AYMCX"/>
        </sharesOutstandings>
        <fundType>N/A</fundType>
        <isNonDiversifiedCompany>N</isNonDiversifiedCompany>
        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>N</isFundSecuritiesLending>
        <didFundLendSecurities>N</didFundLendSecurities>
        <paymentToAgentManagerType>N/A</paymentToAgentManagerType>
        <avgPortfolioSecuritiesValue>N/A</avgPortfolioSecuritiesValue>
        <netIncomeSecuritiesLending>N/A</netIncomeSecuritiesLending>
        <relyOnRuleTypes>
          <relyOnRuleType>Rule 12d1-1 (17 CFR 270.12d1-1)</relyOnRuleType>
          <relyOnRuleType>Rule 17a-7 (17 CFR 270.17a-7)</relyOnRuleType>
          <relyOnRuleType>Rule 22d-1 (17 CFR 270.22d-1)</relyOnRuleType>
          <relyOnRuleType>Rule 32a-4 (17 CFR 270.32a-4)</relyOnRuleType>
          <relyOnRuleType>Rule 12d1-4 (17 CFR 270.12d1-4)</relyOnRuleType>
          <relyOnRuleType>Rule 18f-4 (17 CFR 270.18f-4)</relyOnRuleType>
          <relyOnRuleType>Rule 18f-4(c)(4) (17CFR 270.18f-4(c)(4))</relyOnRuleType>
        </relyOnRuleTypes>
        <isExpenseLimitationInPlace>Y</isExpenseLimitationInPlace>
        <isExpenseReducedOrWaived>Y</isExpenseReducedOrWaived>
        <isFeesWaivedRecoupable>N</isFeesWaivedRecoupable>
        <isExpenseWaivedRecoupable>N</isExpenseWaivedRecoupable>
        <investmentAdvisers>
          <investmentAdviser>
            <investmentAdviserName>American Century Investment Management, Inc.</investmentAdviserName>
            <investmentAdviserFileNo>801-08174</investmentAdviserFileNo>
            <investmentAdviserCrdNo>000105778</investmentAdviserCrdNo>
            <investmentAdviserLei>EM2U0UPRO83F878KCP52</investmentAdviserLei>
            <investmentAdviserRssdId>N/A</investmentAdviserRssdId>
            <investmentAdviserStateCountry investmentAdviserState="US-MO" investmentAdviserCountry="US"/>
            <isInvestmentAdviserHired>N</isInvestmentAdviserHired>
          </investmentAdviser>
        </investmentAdvisers>
        <transferAgents>
          <transferAgent>
            <transferAgentName>American Century Services, LLC</transferAgentName>
            <transferAgentFileNo>84-01406</transferAgentFileNo>
            <transferAgentLei>N/A</transferAgentLei>
            <transferAgentRssdId>N/A</transferAgentRssdId>
            <transferAgentStateCountry transferAgentState="US-MO" transferAgentCountry="US"/>
            <isTransferAgentAffiliated>Y</isTransferAgentAffiliated>
            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
          </transferAgent>
        </transferAgents>
        <isTransferAgentHiredOrTerminated>N</isTransferAgentHiredOrTerminated>
        <pricingServices>
          <pricingService>
            <pricingServiceName>ICE Data Pricing and Reference Data, LLC </pricingServiceName>
            <pricingServiceLei>5493000NQ9LYLDBCTL34</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>S&amp;P Global Inc</pricingServiceName>
            <pricingServiceLei>Y6X4K52KMJMZE7I7MY94</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>Refinitiv US LLC</pricingServiceName>
            <pricingServiceLei>213800HQORQAP68CJJ04</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>PricingDirect Inc.</pricingServiceName>
            <pricingServiceLei>549300WIC0TOJ7N7GD54</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
        </pricingServices>
        <isPricingServiceHiredOrTerminated>N</isPricingServiceHiredOrTerminated>
        <custodians>
          <custodian>
            <custodianName>State Street Bank and Trust Company</custodianName>
            <custodianLei>571474TGEMMWANRLN572</custodianLei>
            <custodianRssdId>N/A</custodianRssdId>
            <custodianStateCountry custodianState="US-MA" custodianCountry="US"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>N</isSubCustodian>
            <custodyType>Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))</custodyType>
          </custodian>
        </custodians>
        <isCustodianHiredOrTerminated>N</isCustodianHiredOrTerminated>
        <shareholderServicingAgents>
          <shareholderServicingAgent>
            <shareholderServiceAgentName>American Century Services, LLC</shareholderServiceAgentName>
            <shareholderServiceAgentLei>N/A</shareholderServiceAgentLei>
            <shareholderServiceAgentRssdId>N/A</shareholderServiceAgentRssdId>
            <shareholderServiceAgentStateCountry shareholderServiceAgentState="US-MO" shareholderServiceAgentCountry="US"/>
            <isShareholderServiceAgentAffiliated>Y</isShareholderServiceAgentAffiliated>
            <isShareholderServiceAgentSubshare>N</isShareholderServiceAgentSubshare>
          </shareholderServicingAgent>
        </shareholderServicingAgents>
        <isShareholderServiceHiredTerminated>N</isShareholderServiceHiredTerminated>
        <admins>
          <admin>
            <adminName>American Century Services, LLC</adminName>
            <adminLei>N/A</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MO" adminCountry="US"/>
            <isAdminAffiliated>Y</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
          </admin>
          <admin>
            <adminName>State Street Bank and Trust Company</adminName>
            <adminLei>571474TGEMMWANRLN572</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MA" adminCountry="US"/>
            <isAdminAffiliated>N</isAdminAffiliated>
            <isAdminSubAdmin>Y</isAdminSubAdmin>
          </admin>
        </admins>
        <isAdminHiredOrTerminated>N</isAdminHiredOrTerminated>
        <brokerDealers>
          <brokerDealer>
            <brokerDealerName>American Century Investment Services, Inc.</brokerDealerName>
            <brokerDealerFileNo>8-35220</brokerDealerFileNo>
            <brokerDealerCrdNo>000017437</brokerDealerCrdNo>
            <brokerDealerLei>N/A</brokerDealerLei>
            <brokerDealerRssdId>N/A</brokerDealerRssdId>
            <brokerDealerStateCountry brokerDealerState="US-MO" brokerDealerCountry="US"/>
            <brokerDealerCommission>0.000000000000</brokerDealerCommission>
          </brokerDealer>
        </brokerDealers>
        <brokers>
          <broker>
            <brokerName>BANK OF AMERICA MERRILL LYNCH</brokerName>
            <brokerFileNo>008-07221</brokerFileNo>
            <brokerCrdNo>000007691</brokerCrdNo>
            <brokerLei>549300HN4UKV1E2R3U73</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>1164.150000000000</grossCommission>
          </broker>
          <broker>
            <brokerName>JANE STREET GROUP LLC</brokerName>
            <brokerFileNo>008-52275</brokerFileNo>
            <brokerCrdNo>000103782</brokerCrdNo>
            <brokerLei>549300ZM16HMPEPNV857</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>418.500000000000</grossCommission>
          </broker>
        </brokers>
        <aggregateCommission>1582.650000000000</aggregateCommission>
        <principalTransactions>
          <principalTransaction>
            <principalName>J.P. MORGAN SECURITIES</principalName>
            <principalFileNo>008-35008</principalFileNo>
            <principalCrdNo>000000079</principalCrdNo>
            <principalLei>ZBUT11V806EZRVTWT807</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>118927663.250000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>WELLS FARGO SECURITIES</principalName>
            <principalFileNo>008-65876</principalFileNo>
            <principalCrdNo>000126292</principalCrdNo>
            <principalLei>VYVVCKR63DVZZN70PB21</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NC" principalCountry="US"/>
            <principalTotalPurchaseSale>73125161.120000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>MORGAN STANLEY</principalName>
            <principalFileNo>008-15869</principalFileNo>
            <principalCrdNo>000008209</principalCrdNo>
            <principalLei>9R7GPTSO7KV3UQJZQ078</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>39286632.180000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>GOLDMAN SACHS</principalName>
            <principalFileNo>008-00129</principalFileNo>
            <principalCrdNo>000000361</principalCrdNo>
            <principalLei>FOR8UP27PHTHYVLBNG30</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>26123856.190000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>BANK OF AMERICA MERRILL LYNCH</principalName>
            <principalFileNo>008-07221</principalFileNo>
            <principalCrdNo>000007691</principalCrdNo>
            <principalLei>549300HN4UKV1E2R3U73</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>24243258.420000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>RBC CAPITAL MARKETS</principalName>
            <principalFileNo>008-45411</principalFileNo>
            <principalCrdNo>000031194</principalCrdNo>
            <principalLei>549300LCO2FLSSVFFR64</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>23378708.290000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>PIPER SANDLER &amp; CO</principalName>
            <principalFileNo>008-15204</principalFileNo>
            <principalCrdNo>000000665</principalCrdNo>
            <principalLei>549300GRQCWQ3XGH0H10</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-MN" principalCountry="US"/>
            <principalTotalPurchaseSale>20889710.540000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>ZIEGLER SECURITIES</principalName>
            <principalFileNo>008-00094</principalFileNo>
            <principalCrdNo>000000061</principalCrdNo>
            <principalLei>549300NLEOFP92P38Q71</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-IL" principalCountry="US"/>
            <principalTotalPurchaseSale>19694941.080000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>STIFEL NICOLAUS &amp; CO MARKETS</principalName>
            <principalFileNo>008-01447</principalFileNo>
            <principalCrdNo>000000793</principalCrdNo>
            <principalLei>5WUVMA08EYG4KEUPW589</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-MO" principalCountry="US"/>
            <principalTotalPurchaseSale>15915238.850000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>TORONTO-DOMINION CORP</principalName>
            <principalFileNo>008-36747</principalFileNo>
            <principalCrdNo>000018476</principalCrdNo>
            <principalLei>69LASGQF5I0RN31MEN24</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>15113303.710000000000</principalTotalPurchaseSale>
          </principalTransaction>
        </principalTransactions>
        <principalAggregatePurchase>459691313.660000000000</principalAggregatePurchase>
        <isBrokerageResearchPayment>N</isBrokerageResearchPayment>
        <mnthlyAvgNetAssets>568067799.667692000000</mnthlyAvgNetAssets>
        <hasLineOfCredit>N</hasLineOfCredit>
        <isInterfundLending>N</isInterfundLending>
        <isInterfundBorrowing>N</isInterfundBorrowing>
        <isSwingPricing>N</isSwingPricing>
        <liquidityClassifications>
          <liquidityClassificationService>
            <liquidityName>ICE Data Processing &amp; Reference Data, LLC</liquidityName>
            <liquidityLei>5493000NQ9LYLDBCTL34</liquidityLei>
            <liquidityRssdId>N/A</liquidityRssdId>
            <liquidityStateCountry liquidityState="US-NY" liquidityCountry="US"/>
            <isAffiliatedPerson>N</isAffiliatedPerson>
            <assetClassType>Equity-common</assetClassType>
            <assetClassType>Debt</assetClassType>
            <assetClassType>Derivative-equity</assetClassType>
            <assetClassType>Derivative-interest rate</assetClassType>
          </liquidityClassificationService>
        </liquidityClassifications>
        <isLiquidityHiredTerminated>N</isLiquidityHiredTerminated>
      </managementInvestmentQuestion>
      <managementInvestmentQuestion>
        <mgmtInvFundName>Intermediate-Term Tax-Free Bond Fund</mgmtInvFundName>
        <mgmtInvSeriesId>S000006472</mgmtInvSeriesId>
        <mgmtInvLei>N34IG7F8B7ZLN3TQY404</mgmtInvLei>
        <isFirstFilingByFund>N</isFirstFilingByFund>
        <numAuthorizedClass>5</numAuthorizedClass>
        <numAddedClass>0</numAddedClass>
        <numTerminatedClass>0</numTerminatedClass>
        <sharesOutstandings>
          <sharesOutstanding sharesOutstandingClassName="Investor Class" sharesOutstandingClassId="C000017689" sharesOutstandingTickerSymbol="TWTIX"/>
          <sharesOutstanding sharesOutstandingClassName="I Class" sharesOutstandingClassId="C000017691" sharesOutstandingTickerSymbol="AXBIX"/>
          <sharesOutstanding sharesOutstandingClassName="Y Class" sharesOutstandingClassId="C000189767" sharesOutstandingTickerSymbol="ATBYX"/>
          <sharesOutstanding sharesOutstandingClassName="A Class" sharesOutstandingClassId="C000088013" sharesOutstandingTickerSymbol="TWWOX"/>
          <sharesOutstanding sharesOutstandingClassName="C Class" sharesOutstandingClassId="C000088014" sharesOutstandingTickerSymbol="TWTCX"/>
        </sharesOutstandings>
        <fundType>N/A</fundType>
        <isNonDiversifiedCompany>N</isNonDiversifiedCompany>
        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>N</isFundSecuritiesLending>
        <didFundLendSecurities>N</didFundLendSecurities>
        <paymentToAgentManagerType>N/A</paymentToAgentManagerType>
        <avgPortfolioSecuritiesValue>N/A</avgPortfolioSecuritiesValue>
        <netIncomeSecuritiesLending>N/A</netIncomeSecuritiesLending>
        <relyOnRuleTypes>
          <relyOnRuleType>Rule 12d1-1 (17 CFR 270.12d1-1)</relyOnRuleType>
          <relyOnRuleType>Rule 17a-7 (17 CFR 270.17a-7)</relyOnRuleType>
          <relyOnRuleType>Rule 22d-1 (17 CFR 270.22d-1)</relyOnRuleType>
          <relyOnRuleType>Rule 32a-4 (17 CFR 270.32a-4)</relyOnRuleType>
          <relyOnRuleType>Rule 12d1-4 (17 CFR 270.12d1-4)</relyOnRuleType>
          <relyOnRuleType>Rule 18f-4 (17 CFR 270.18f-4)</relyOnRuleType>
          <relyOnRuleType>Rule 18f-4(c)(4) (17CFR 270.18f-4(c)(4))</relyOnRuleType>
        </relyOnRuleTypes>
        <isExpenseLimitationInPlace>N</isExpenseLimitationInPlace>
        <isExpenseReducedOrWaived>N</isExpenseReducedOrWaived>
        <isFeesWaivedRecoupable>N</isFeesWaivedRecoupable>
        <isExpenseWaivedRecoupable>N</isExpenseWaivedRecoupable>
        <investmentAdvisers>
          <investmentAdviser>
            <investmentAdviserName>American Century Investment Management, Inc.</investmentAdviserName>
            <investmentAdviserFileNo>801-08174</investmentAdviserFileNo>
            <investmentAdviserCrdNo>000105778</investmentAdviserCrdNo>
            <investmentAdviserLei>EM2U0UPRO83F878KCP52</investmentAdviserLei>
            <investmentAdviserRssdId>N/A</investmentAdviserRssdId>
            <investmentAdviserStateCountry investmentAdviserState="US-MO" investmentAdviserCountry="US"/>
            <isInvestmentAdviserHired>N</isInvestmentAdviserHired>
          </investmentAdviser>
        </investmentAdvisers>
        <transferAgents>
          <transferAgent>
            <transferAgentName>American Century Services, LLC</transferAgentName>
            <transferAgentFileNo>84-01406</transferAgentFileNo>
            <transferAgentLei>N/A</transferAgentLei>
            <transferAgentRssdId>N/A</transferAgentRssdId>
            <transferAgentStateCountry transferAgentState="US-MO" transferAgentCountry="US"/>
            <isTransferAgentAffiliated>Y</isTransferAgentAffiliated>
            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
          </transferAgent>
        </transferAgents>
        <isTransferAgentHiredOrTerminated>N</isTransferAgentHiredOrTerminated>
        <pricingServices>
          <pricingService>
            <pricingServiceName>ICE Data Pricing and Reference Data, LLC </pricingServiceName>
            <pricingServiceLei>5493000NQ9LYLDBCTL34</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>S&amp;P Global Inc</pricingServiceName>
            <pricingServiceLei>Y6X4K52KMJMZE7I7MY94</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>Refinitiv US LLC</pricingServiceName>
            <pricingServiceLei>213800HQORQAP68CJJ04</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>PricingDirect Inc.</pricingServiceName>
            <pricingServiceLei>549300WIC0TOJ7N7GD54</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
        </pricingServices>
        <isPricingServiceHiredOrTerminated>N</isPricingServiceHiredOrTerminated>
        <custodians>
          <custodian>
            <custodianName>State Street Bank and Trust Company</custodianName>
            <custodianLei>571474TGEMMWANRLN572</custodianLei>
            <custodianRssdId>N/A</custodianRssdId>
            <custodianStateCountry custodianState="US-MA" custodianCountry="US"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>N</isSubCustodian>
            <custodyType>Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))</custodyType>
          </custodian>
        </custodians>
        <isCustodianHiredOrTerminated>N</isCustodianHiredOrTerminated>
        <shareholderServicingAgents>
          <shareholderServicingAgent>
            <shareholderServiceAgentName>American Century Services, LLC</shareholderServiceAgentName>
            <shareholderServiceAgentLei>N/A</shareholderServiceAgentLei>
            <shareholderServiceAgentRssdId>N/A</shareholderServiceAgentRssdId>
            <shareholderServiceAgentStateCountry shareholderServiceAgentState="US-MO" shareholderServiceAgentCountry="US"/>
            <isShareholderServiceAgentAffiliated>Y</isShareholderServiceAgentAffiliated>
            <isShareholderServiceAgentSubshare>N</isShareholderServiceAgentSubshare>
          </shareholderServicingAgent>
        </shareholderServicingAgents>
        <isShareholderServiceHiredTerminated>N</isShareholderServiceHiredTerminated>
        <admins>
          <admin>
            <adminName>American Century Services, LLC</adminName>
            <adminLei>N/A</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MO" adminCountry="US"/>
            <isAdminAffiliated>Y</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
          </admin>
          <admin>
            <adminName>State Street Bank and Trust Company</adminName>
            <adminLei>571474TGEMMWANRLN572</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MA" adminCountry="US"/>
            <isAdminAffiliated>N</isAdminAffiliated>
            <isAdminSubAdmin>Y</isAdminSubAdmin>
          </admin>
        </admins>
        <isAdminHiredOrTerminated>N</isAdminHiredOrTerminated>
        <brokerDealers>
          <brokerDealer>
            <brokerDealerName>American Century Investment Services, Inc.</brokerDealerName>
            <brokerDealerFileNo>8-35220</brokerDealerFileNo>
            <brokerDealerCrdNo>000017437</brokerDealerCrdNo>
            <brokerDealerLei>N/A</brokerDealerLei>
            <brokerDealerRssdId>N/A</brokerDealerRssdId>
            <brokerDealerStateCountry brokerDealerState="US-MO" brokerDealerCountry="US"/>
            <brokerDealerCommission>0.000000000000</brokerDealerCommission>
          </brokerDealer>
        </brokerDealers>
        <brokers>
          <broker>
            <brokerName>BANK OF AMERICA MERRILL LYNCH</brokerName>
            <brokerFileNo>008-07221</brokerFileNo>
            <brokerCrdNo>000007691</brokerCrdNo>
            <brokerLei>549300HN4UKV1E2R3U73</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>7837.050000000000</grossCommission>
          </broker>
          <broker>
            <brokerName>VIRTU FINANCIAL LLC</brokerName>
            <brokerFileNo>008-51262</brokerFileNo>
            <brokerCrdNo>000045986</brokerCrdNo>
            <brokerLei>Q1YYTO5MBHNGETR9DT80</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>4326.000000000000</grossCommission>
          </broker>
          <broker>
            <brokerName>MORGAN STANLEY</brokerName>
            <brokerFileNo>008-15869</brokerFileNo>
            <brokerCrdNo>000008209</brokerCrdNo>
            <brokerLei>9R7GPTSO7KV3UQJZQ078</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>2008.500000000000</grossCommission>
          </broker>
          <broker>
            <brokerName>JANE STREET GROUP LLC</brokerName>
            <brokerFileNo>008-52275</brokerFileNo>
            <brokerCrdNo>000103782</brokerCrdNo>
            <brokerLei>549300ZM16HMPEPNV857</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-NY" brokerCountry="US"/>
            <grossCommission>1528.500000000000</grossCommission>
          </broker>
          <broker>
            <brokerName>CITADEL SECURITIES CSHC US LLC</brokerName>
            <brokerFileNo>008-53574</brokerFileNo>
            <brokerCrdNo>000116797</brokerCrdNo>
            <brokerLei>549300NV5RXBUS3X7L47</brokerLei>
            <brokerRssdId>N/A</brokerRssdId>
            <brokerStateCountry brokerState="US-IL" brokerCountry="US"/>
            <grossCommission>1458.000000000000</grossCommission>
          </broker>
        </brokers>
        <aggregateCommission>17158.050000000000</aggregateCommission>
        <principalTransactions>
          <principalTransaction>
            <principalName>J.P. MORGAN SECURITIES</principalName>
            <principalFileNo>008-35008</principalFileNo>
            <principalCrdNo>000000079</principalCrdNo>
            <principalLei>ZBUT11V806EZRVTWT807</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>1166109668.290000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>WELLS FARGO SECURITIES</principalName>
            <principalFileNo>008-65876</principalFileNo>
            <principalCrdNo>000126292</principalCrdNo>
            <principalLei>VYVVCKR63DVZZN70PB21</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NC" principalCountry="US"/>
            <principalTotalPurchaseSale>608703761.260000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>MORGAN STANLEY</principalName>
            <principalFileNo>008-15869</principalFileNo>
            <principalCrdNo>000008209</principalCrdNo>
            <principalLei>9R7GPTSO7KV3UQJZQ078</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>568917331.670000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>GOLDMAN SACHS</principalName>
            <principalFileNo>008-00129</principalFileNo>
            <principalCrdNo>000000361</principalCrdNo>
            <principalLei>FOR8UP27PHTHYVLBNG30</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>263782382.440000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>BANK OF AMERICA MERRILL LYNCH</principalName>
            <principalFileNo>008-07221</principalFileNo>
            <principalCrdNo>000007691</principalCrdNo>
            <principalLei>549300HN4UKV1E2R3U73</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>251406672.950000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>RBC CAPITAL MARKETS</principalName>
            <principalFileNo>008-45411</principalFileNo>
            <principalCrdNo>000031194</principalCrdNo>
            <principalLei>549300LCO2FLSSVFFR64</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>181185106.050000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>JEFFERIES LLC</principalName>
            <principalFileNo>008-15074</principalFileNo>
            <principalCrdNo>000002347</principalCrdNo>
            <principalLei>58PU97L1C0WSRCWADL48</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>119081274.820000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>ZIEGLER SECURITIES</principalName>
            <principalFileNo>008-00094</principalFileNo>
            <principalCrdNo>000000061</principalCrdNo>
            <principalLei>549300NLEOFP92P38Q71</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-IL" principalCountry="US"/>
            <principalTotalPurchaseSale>114680885.900000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>STIFEL NICOLAUS &amp; CO MARKETS</principalName>
            <principalFileNo>008-01447</principalFileNo>
            <principalCrdNo>000000793</principalCrdNo>
            <principalLei>5WUVMA08EYG4KEUPW589</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-MO" principalCountry="US"/>
            <principalTotalPurchaseSale>95330566.970000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>RAYMOND JAMES</principalName>
            <principalFileNo>008-42071</principalFileNo>
            <principalCrdNo>000025853</principalCrdNo>
            <principalLei>549300QR3RXJKWZMK182</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-CA" principalCountry="US"/>
            <principalTotalPurchaseSale>92567126.930000000000</principalTotalPurchaseSale>
          </principalTransaction>
        </principalTransactions>
        <principalAggregatePurchase>4015185668.700000000000</principalAggregatePurchase>
        <isBrokerageResearchPayment>N</isBrokerageResearchPayment>
        <mnthlyAvgNetAssets>3969806934.560770000000</mnthlyAvgNetAssets>
        <hasLineOfCredit>N</hasLineOfCredit>
        <isInterfundLending>N</isInterfundLending>
        <isInterfundBorrowing>N</isInterfundBorrowing>
        <isSwingPricing>N</isSwingPricing>
        <liquidityClassifications>
          <liquidityClassificationService>
            <liquidityName>ICE Data Processing &amp; Reference Data, LLC</liquidityName>
            <liquidityLei>5493000NQ9LYLDBCTL34</liquidityLei>
            <liquidityRssdId>N/A</liquidityRssdId>
            <liquidityStateCountry liquidityState="US-NY" liquidityCountry="US"/>
            <isAffiliatedPerson>N</isAffiliatedPerson>
            <assetClassType>Equity-common</assetClassType>
            <assetClassType>Debt</assetClassType>
            <assetClassType>Derivative-interest rate</assetClassType>
          </liquidityClassificationService>
        </liquidityClassifications>
        <isLiquidityHiredTerminated>N</isLiquidityHiredTerminated>
      </managementInvestmentQuestion>
      <managementInvestmentQuestion>
        <mgmtInvFundName>Tax-Free Money Market Fund</mgmtInvFundName>
        <mgmtInvSeriesId>S000006473</mgmtInvSeriesId>
        <mgmtInvLei>549300IDYMDLKNF7CY02</mgmtInvLei>
        <isFirstFilingByFund>N</isFirstFilingByFund>
        <numAuthorizedClass>1</numAuthorizedClass>
        <numAddedClass>0</numAddedClass>
        <numTerminatedClass>0</numTerminatedClass>
        <sharesOutstandings>
          <sharesOutstanding sharesOutstandingClassName="Investor Class" sharesOutstandingClassId="C000017692" sharesOutstandingTickerSymbol="BNTXX"/>
        </sharesOutstandings>
        <fundTypes>
          <fundType>Money Market Fund</fundType>
        </fundTypes>
        <isNonDiversifiedCompany>N</isNonDiversifiedCompany>
        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>N</isFundSecuritiesLending>
        <didFundLendSecurities>N</didFundLendSecurities>
        <paymentToAgentManagerType>N/A</paymentToAgentManagerType>
        <avgPortfolioSecuritiesValue>N/A</avgPortfolioSecuritiesValue>
        <netIncomeSecuritiesLending>N/A</netIncomeSecuritiesLending>
        <relyOnRuleTypes>
          <relyOnRuleType>Rule 17a-7 (17 CFR 270.17a-7)</relyOnRuleType>
          <relyOnRuleType>Rule 32a-4 (17 CFR 270.32a-4)</relyOnRuleType>
        </relyOnRuleTypes>
        <isExpenseLimitationInPlace>N</isExpenseLimitationInPlace>
        <isExpenseReducedOrWaived>N</isExpenseReducedOrWaived>
        <isFeesWaivedRecoupable>N</isFeesWaivedRecoupable>
        <isExpenseWaivedRecoupable>N</isExpenseWaivedRecoupable>
        <investmentAdvisers>
          <investmentAdviser>
            <investmentAdviserName>American Century Investment Management, Inc.</investmentAdviserName>
            <investmentAdviserFileNo>801-08174</investmentAdviserFileNo>
            <investmentAdviserCrdNo>000105778</investmentAdviserCrdNo>
            <investmentAdviserLei>EM2U0UPRO83F878KCP52</investmentAdviserLei>
            <investmentAdviserRssdId>N/A</investmentAdviserRssdId>
            <investmentAdviserStateCountry investmentAdviserState="US-MO" investmentAdviserCountry="US"/>
            <isInvestmentAdviserHired>N</isInvestmentAdviserHired>
          </investmentAdviser>
        </investmentAdvisers>
        <transferAgents>
          <transferAgent>
            <transferAgentName>American Century Services, LLC</transferAgentName>
            <transferAgentFileNo>84-01406</transferAgentFileNo>
            <transferAgentLei>N/A</transferAgentLei>
            <transferAgentRssdId>N/A</transferAgentRssdId>
            <transferAgentStateCountry transferAgentState="US-MO" transferAgentCountry="US"/>
            <isTransferAgentAffiliated>Y</isTransferAgentAffiliated>
            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
          </transferAgent>
        </transferAgents>
        <isTransferAgentHiredOrTerminated>N</isTransferAgentHiredOrTerminated>
        <pricingServices>
          <pricingService>
            <pricingServiceName>ICE Data Pricing and Reference Data, LLC </pricingServiceName>
            <pricingServiceLei>5493000NQ9LYLDBCTL34</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>S&amp;P Global Inc</pricingServiceName>
            <pricingServiceLei>Y6X4K52KMJMZE7I7MY94</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>Refinitiv US LLC</pricingServiceName>
            <pricingServiceLei>213800HQORQAP68CJJ04</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>PricingDirect Inc.</pricingServiceName>
            <pricingServiceLei>549300WIC0TOJ7N7GD54</pricingServiceLei>
            <pricingServiceRssdId>N/A</pricingServiceRssdId>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
        </pricingServices>
        <isPricingServiceHiredOrTerminated>N</isPricingServiceHiredOrTerminated>
        <custodians>
          <custodian>
            <custodianName>State Street Bank and Trust Company</custodianName>
            <custodianLei>571474TGEMMWANRLN572</custodianLei>
            <custodianRssdId>N/A</custodianRssdId>
            <custodianStateCountry custodianState="US-MA" custodianCountry="US"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>N</isSubCustodian>
            <custodyType>Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))</custodyType>
          </custodian>
        </custodians>
        <isCustodianHiredOrTerminated>N</isCustodianHiredOrTerminated>
        <shareholderServicingAgents>
          <shareholderServicingAgent>
            <shareholderServiceAgentName>American Century Services, LLC</shareholderServiceAgentName>
            <shareholderServiceAgentLei>N/A</shareholderServiceAgentLei>
            <shareholderServiceAgentRssdId>N/A</shareholderServiceAgentRssdId>
            <shareholderServiceAgentStateCountry shareholderServiceAgentState="US-MO" shareholderServiceAgentCountry="US"/>
            <isShareholderServiceAgentAffiliated>Y</isShareholderServiceAgentAffiliated>
            <isShareholderServiceAgentSubshare>N</isShareholderServiceAgentSubshare>
          </shareholderServicingAgent>
        </shareholderServicingAgents>
        <isShareholderServiceHiredTerminated>N</isShareholderServiceHiredTerminated>
        <admins>
          <admin>
            <adminName>American Century Services, LLC</adminName>
            <adminLei>N/A</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MO" adminCountry="US"/>
            <isAdminAffiliated>Y</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
          </admin>
          <admin>
            <adminName>State Street Bank and Trust Company</adminName>
            <adminLei>571474TGEMMWANRLN572</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminStateCountry adminState="US-MA" adminCountry="US"/>
            <isAdminAffiliated>N</isAdminAffiliated>
            <isAdminSubAdmin>Y</isAdminSubAdmin>
          </admin>
        </admins>
        <isAdminHiredOrTerminated>N</isAdminHiredOrTerminated>
        <brokerDealers>
          <brokerDealer>
            <brokerDealerName>American Century Investment Services, Inc.</brokerDealerName>
            <brokerDealerFileNo>8-35220</brokerDealerFileNo>
            <brokerDealerCrdNo>000017437</brokerDealerCrdNo>
            <brokerDealerLei>N/A</brokerDealerLei>
            <brokerDealerRssdId>N/A</brokerDealerRssdId>
            <brokerDealerStateCountry brokerDealerState="US-MO" brokerDealerCountry="US"/>
            <brokerDealerCommission>0.000000000000</brokerDealerCommission>
          </brokerDealer>
        </brokerDealers>
        <aggregateCommission>0.000000000000</aggregateCommission>
        <principalTransactions>
          <principalTransaction>
            <principalName>J.P. MORGAN SECURITIES</principalName>
            <principalFileNo>008-35008</principalFileNo>
            <principalCrdNo>000000079</principalCrdNo>
            <principalLei>ZBUT11V806EZRVTWT807</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>206562316.460000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>WELLS FARGO SECURITIES</principalName>
            <principalFileNo>008-65876</principalFileNo>
            <principalCrdNo>000126292</principalCrdNo>
            <principalLei>VYVVCKR63DVZZN70PB21</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NC" principalCountry="US"/>
            <principalTotalPurchaseSale>99516765.090000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>MORGAN STANLEY</principalName>
            <principalFileNo>008-15869</principalFileNo>
            <principalCrdNo>000008209</principalCrdNo>
            <principalLei>9R7GPTSO7KV3UQJZQ078</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>87497097.870000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>TORONTO-DOMINION CORP</principalName>
            <principalFileNo>008-36747</principalFileNo>
            <principalCrdNo>000018476</principalCrdNo>
            <principalLei>69LASGQF5I0RN31MEN24</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>59609989.420000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>BARCLAYS CAPITAL</principalName>
            <principalFileNo>008-41342</principalFileNo>
            <principalCrdNo>000019714</principalCrdNo>
            <principalLei>AC28XWWI3WIBK2824319</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>40484107.660000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>RBC CAPITAL MARKETS</principalName>
            <principalFileNo>008-45411</principalFileNo>
            <principalCrdNo>000031194</principalCrdNo>
            <principalLei>549300LCO2FLSSVFFR64</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>19373913.750000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>PNC CAPITAL MARKET</principalName>
            <principalFileNo>008-32493</principalFileNo>
            <principalCrdNo>000015647</principalCrdNo>
            <principalLei>7OGNSSLOQJ8U3B9Y5F18</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-PA" principalCountry="US"/>
            <principalTotalPurchaseSale>16862129.070000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>GOLDMAN SACHS</principalName>
            <principalFileNo>008-00129</principalFileNo>
            <principalCrdNo>000000361</principalCrdNo>
            <principalLei>FOR8UP27PHTHYVLBNG30</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>15770102.900000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>PIPER SANDLER &amp; CO</principalName>
            <principalFileNo>008-15204</principalFileNo>
            <principalCrdNo>000000665</principalCrdNo>
            <principalLei>549300GRQCWQ3XGH0H10</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-MN" principalCountry="US"/>
            <principalTotalPurchaseSale>15305261.080000000000</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>BANK OF NEW YORK</principalName>
            <principalFileNo>008-35255</principalFileNo>
            <principalCrdNo>000017454</principalCrdNo>
            <principalLei>VJW2DOOHGDT6PR0ZRO63</principalLei>
            <principalRssdId>N/A</principalRssdId>
            <principalStateCountry principalState="US-NY" principalCountry="US"/>
            <principalTotalPurchaseSale>13267493.110000000000</principalTotalPurchaseSale>
          </principalTransaction>
        </principalTransactions>
        <principalAggregatePurchase>620970928.650000000000</principalAggregatePurchase>
        <isBrokerageResearchPayment>N</isBrokerageResearchPayment>
        <dailyAvgNetAssets>158429123.462705000000</dailyAvgNetAssets>
        <hasLineOfCredit>N</hasLineOfCredit>
        <isInterfundLending>N</isInterfundLending>
        <isInterfundBorrowing>N</isInterfundBorrowing>
        <isSwingPricing>N</isSwingPricing>
        <liquidityClassifications>
          <liquidityClassificationService>
            <liquidityName>ICE Data Processing &amp; Reference Data, LLC</liquidityName>
            <liquidityLei>5493000NQ9LYLDBCTL34</liquidityLei>
            <liquidityRssdId>N/A</liquidityRssdId>
            <liquidityStateCountry liquidityState="US-NY" liquidityCountry="US"/>
            <isAffiliatedPerson>N</isAffiliatedPerson>
            <assetClassType>Short-term investment vehicle</assetClassType>
            <assetClassType>Debt</assetClassType>
          </liquidityClassificationService>
        </liquidityClassifications>
        <isLiquidityHiredTerminated>N</isLiquidityHiredTerminated>
      </managementInvestmentQuestion>
    </managementInvestmentQuestionSeriesInfo>
    <exchangeSeriesInfo/>
    <attachmentsTab>
      <isIPAReportInternalControl>true</isIPAReportInternalControl>
    </attachmentsTab>
    <signature registrantSignedName="AMERICAN CENTURY MUNICIPAL TRUST " signedDate="2026-07-31" signature="Amy R. Bitter" title="Assistant Treasurer"/>
  </formData>
</edgarSubmission>
