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            <isCustodianAffiliated>N</isCustodianAffiliated>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>CITIBANK,N.A.</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>SG</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>FIRSTRAND BANK LIMITED</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>ZA</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>HSBC BANK AUSTRALIA LIMITED</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>AU</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK AG</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>BE</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>EUROCLEAR BANK</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>BE</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>ROYAL BANK OF CANADA</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>CA</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>State Street Trust Company Canada</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>CA</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>State Street Bank International GmbH</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>DE</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>NORDEA BANK AB (PUBL), FINNISH BRANCH</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>DK</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
        </custodians>
        <isCustodianHiredOrTerminated>Y</isCustodianHiredOrTerminated>
        <shareholderServicingAgents>
          <shareholderServicingAgent>
            <shareholderServiceAgentName>State Street Bank and Trust Company</shareholderServiceAgentName>
            <shareholderServiceAgentLei>571474TGEMMWANRLN572</shareholderServiceAgentLei>
            <shareholderServiceAgentStateCountry shareholderServiceAgentState="US-MA" shareholderServiceAgentCountry="US"/>
            <isShareholderServiceAgentAffiliated>N</isShareholderServiceAgentAffiliated>
            <isShareholderServiceAgentSubshare>N</isShareholderServiceAgentSubshare>
          </shareholderServicingAgent>
        </shareholderServicingAgents>
        <isShareholderServiceHiredTerminated>Y</isShareholderServiceHiredTerminated>
        <admins>
          <admin>
            <adminName>American Century Services, LLC</adminName>
            <adminLei>84-01406</adminLei>
            <idNumberDesc>SEC file number</idNumberDesc>
            <adminStateCountry adminCountry="US" adminState="US-MO"/>
            <isAdminAffiliated>Y</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
          </admin>
          <admin>
            <adminName>State Street Bank and Trust Company</adminName>
            <adminLei>571474TGEMMWANRLN572</adminLei>
            <adminStateCountry adminCountry="US" adminState="US-MA"/>
            <isAdminAffiliated>N</isAdminAffiliated>
            <isAdminSubAdmin>Y</isAdminSubAdmin>
          </admin>
        </admins>
        <isAdminHiredOrTerminated>Y</isAdminHiredOrTerminated>
        <brokerDealers>
          <brokerDealer>
            <brokerDealerName>American Century Investment Services, Inc.</brokerDealerName>
            <brokerDealerFileNo>008-35220</brokerDealerFileNo>
            <brokerDealerCrdNo>000017437</brokerDealerCrdNo>
            <brokerDealerLei>N/A</brokerDealerLei>
            <brokerDealerStateCountry brokerDealerState="US-MO" brokerDealerCountry="US"/>
            <brokerDealerCommission>0</brokerDealerCommission>
          </brokerDealer>
        </brokerDealers>
        <aggregateCommission>0</aggregateCommission>
        <principalTransactions>
          <principalTransaction>
            <principalName>Marketaxess Corporation</principalName>
            <principalFileNo>008-50727</principalFileNo>
            <principalCrdNo>000044542</principalCrdNo>
            <principalLei>GPSMMRI21JE7ZCVYF972</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>3172306</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Citigroup Capital Markets Inc</principalName>
            <principalFileNo>008-08177</principalFileNo>
            <principalCrdNo>000007059</principalCrdNo>
            <principalLei>MBNUM2BPBDO7JBLYG310</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>314372</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Millennium Advisors LLC</principalName>
            <principalFileNo>008-68349</principalFileNo>
            <principalCrdNo>000151236</principalCrdNo>
            <principalLei>254900E1P6Z2XZYSA163</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NC"/>
            <principalTotalPurchaseSale>1707631</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Goldman Sachs</principalName>
            <principalFileNo>008-00129</principalFileNo>
            <principalCrdNo>000000361</principalCrdNo>
            <principalLei>FOR8UP27PHTHYVLBNG30</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>1221588</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Morgan Stanley</principalName>
            <principalFileNo>008-15869</principalFileNo>
            <principalCrdNo>000008209</principalCrdNo>
            <principalLei>9R7GPTSO7KV3UQJZQ078</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>971414</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Wells Fargo Securities</principalName>
            <principalFileNo>008-65876</principalFileNo>
            <principalCrdNo>000126292</principalCrdNo>
            <principalLei>VYVVCKR63DVZZN70PB21</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NC"/>
            <principalTotalPurchaseSale>871238</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>J.P. Morgan Securities</principalName>
            <principalFileNo>008-35008</principalFileNo>
            <principalCrdNo>000000079</principalCrdNo>
            <principalLei>ZBUT11V806EZRVTWT807</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>823062</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>HSBC Securities Incorporated</principalName>
            <principalFileNo>008-41562</principalFileNo>
            <principalCrdNo>000019585</principalCrdNo>
            <principalLei>CYYGQCGNHMHPSMRL3R97</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>470765</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Barclays Capital</principalName>
            <principalFileNo>008-41342</principalFileNo>
            <principalCrdNo>000019714</principalCrdNo>
            <principalLei>AC28XWWI3WIBK2824319</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>435153</principalTotalPurchaseSale>
          </principalTransaction>
          <principalTransaction>
            <principalName>Mitsubishi UFJ Securities</principalName>
            <principalFileNo>008-43026</principalFileNo>
            <principalCrdNo>000019685</principalCrdNo>
            <principalLei>K5HU16E3LMSVCCJJJ255</principalLei>
            <principalStateCountry principalCountry="US" principalState="US-NY"/>
            <principalTotalPurchaseSale>378819</principalTotalPurchaseSale>
          </principalTransaction>
        </principalTransactions>
        <principalAggregatePurchase>11535538</principalAggregatePurchase>
        <isBrokerageResearchPayment>Y</isBrokerageResearchPayment>
        <mnthlyAvgNetAssets>12355792.64</mnthlyAvgNetAssets>
        <hasLineOfCredit>N</hasLineOfCredit>
        <isInterfundLending>N</isInterfundLending>
        <isInterfundBorrowing>N</isInterfundBorrowing>
        <isSwingPricing>N</isSwingPricing>
      </managementInvestmentQuestion>
      <managementInvestmentQuestion>
        <mgmtInvFundName>American Century STOXX U.S. Quality Value ETF</mgmtInvFundName>
        <mgmtInvSeriesId>S000060786</mgmtInvSeriesId>
        <mgmtInvLei>549300MVBKFDHGBLXN54</mgmtInvLei>
        <isFirstFilingByFund>Y</isFirstFilingByFund>
        <numAuthorizedClass>1</numAuthorizedClass>
        <numAddedClass>1</numAddedClass>
        <numTerminatedClass>0</numTerminatedClass>
        <sharesOutstandings>
          <sharesOutstanding sharesOutstandingClassName="American Century STOXX U.S. Quality Value ETF" sharesOutstandingClassId="C000197602" sharesOutstandingTickerSymbol="VALQ"/>
        </sharesOutstandings>
        <fundTypes>
          <fundType>Exchange-Traded Fund</fundType>
          <indexFundInfo fundType="Index Fund">
            <isIndexFundAffiliated>N</isIndexFundAffiliated>
            <isIndexFundExclusive>Y</isIndexFundExclusive>
            <indexFundReturnDiffBeforeExpense>0.100750126362</indexFundReturnDiffBeforeExpense>
            <indexFundReturnDiffAfterExpense>-0.205306663000</indexFundReturnDiffAfterExpense>
            <indexFundReturnDailyStdevBeforeExpense>0.006152966660</indexFundReturnDailyStdevBeforeExpense>
            <indexFundReturnDailyStdevAfterExpense>0.006201629994</indexFundReturnDailyStdevAfterExpense>
          </indexFundInfo>
        </fundTypes>
        <isNonDiversifiedCompany>N</isNonDiversifiedCompany>
        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>Y</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 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>
            <investmentAdviserStateCountry investmentAdviserState="US-MO" investmentAdviserCountry="US"/>
            <investmentAdviserHired isInvestmentAdviserHired="Y">
              <investmentAdviserStartDate>2018-01-01</investmentAdviserStartDate>
            </investmentAdviserHired>
          </investmentAdviser>
        </investmentAdvisers>
        <transferAgents>
          <transferAgent>
            <transferAgentName>State Street Bank and Trust Company</transferAgentName>
            <transferAgentFileNo>085-05003</transferAgentFileNo>
            <transferAgentLei>571474TGEMMWANRLN572</transferAgentLei>
            <transferAgentStateCountry transferAgentState="US-MA" transferAgentCountry="US"/>
            <isTransferAgentAffiliated>N</isTransferAgentAffiliated>
            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
          </transferAgent>
        </transferAgents>
        <isTransferAgentHiredOrTerminated>Y</isTransferAgentHiredOrTerminated>
        <pricingServices>
          <pricingService>
            <pricingServiceName>ICE Data Pricing and Reference Data, LLC</pricingServiceName>
            <pricingServiceLei>5493000NQ9LYLDBCTL34</pricingServiceLei>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>IHS MARKIT GROUP HOLDINGS LIMITED</pricingServiceName>
            <pricingServiceLei>2138005LTLTVZ4WMEX25</pricingServiceLei>
            <pricingServiceCountry>GB</pricingServiceCountry>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>Thomson Reuters Markets, LLC</pricingServiceName>
            <pricingServiceLei>N/A</pricingServiceLei>
            <pricingServiceStateCountry pricingServiceState="US-DE" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>ITG Solutions Network, Inc.</pricingServiceName>
            <pricingServiceLei>N/A</pricingServiceLei>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>PricingDirect Inc.</pricingServiceName>
            <pricingServiceLei>549300WIC0TOJ7N7GD54</pricingServiceLei>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
          <pricingService>
            <pricingServiceName>Interactive Data Real Time Services, Inc.</pricingServiceName>
            <pricingServiceLei>N/A</pricingServiceLei>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
          </pricingService>
        </pricingServices>
        <isPricingServiceHiredOrTerminated>Y</isPricingServiceHiredOrTerminated>
        <custodians>
          <custodian>
            <custodianName>State Street Bank and Trust Company</custodianName>
            <custodianLei>571474TGEMMWANRLN572</custodianLei>
            <custodianStateCountry custodianCountry="US" custodianState="US-MA"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>N</isSubCustodian>
            <custodyType>Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))</custodyType>
          </custodian>
          <custodian>
            <custodianName>NORDEA BANK AB (PUBL), FINNISH BRANCH</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>DK</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK SOCIEDAD ANONIMA ESPA</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>ES</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>NORDEA BANK AB (PUBL), FINNISH BRANCH</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>FI</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK AG</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>FR</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>STATE STREET BK LONDON - CREST</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>GB</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK AG</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>GB</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>STATE STREET BANK AND TRUST COMPANY</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>GB</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>STANDARD CHARTERED BANK (HONG KONG)</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>HK</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>State Street Bank and Trust Company</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>IE</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>BANK HAPOALIM B.M.</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>IL</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK AG</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>AT</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK S.P.A.</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>IT</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>HONGKONG AND SHANGHAI BANKING CORP</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>JP</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>CITIBANK NA MEXICO</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>MX</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>DEUTSCHE BANK AG</custodianName>
            <custodianLei>N/A</custodianLei>
            <custodianCountry>NL</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
          <custodian>
            <custodianName>HONGKONG AND SHANGHAI BANKING CORP</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
          </custodian>
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            <isCustodianAffiliated>N</isCustodianAffiliated>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodianName>CITIBANK,N.A.</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
            <custodianName>CREDIT SUISSE (SCHWEIZ) AG</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
            <custodianName>State Street Bank International GmbH</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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        <isCustodianHiredOrTerminated>Y</isCustodianHiredOrTerminated>
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          <shareholderServicingAgent>
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            <isShareholderServiceAgentSubshare>N</isShareholderServiceAgentSubshare>
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        <isShareholderServiceHiredTerminated>Y</isShareholderServiceHiredTerminated>
        <admins>
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          <admin>
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        <isAdminHiredOrTerminated>Y</isAdminHiredOrTerminated>
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        <hasLineOfCredit>N</hasLineOfCredit>
        <isInterfundLending>N</isInterfundLending>
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        <isInKindETF>Y</isInKindETF>
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    <attachmentsTab>
      <isLegalProceedings>false</isLegalProceedings>
      <isProvisionFinancialSupport>false</isProvisionFinancialSupport>
      <isIPAReportInternalControl>true</isIPAReportInternalControl>
      <isChangeAccPrinciples>false</isChangeAccPrinciples>
      <isInfoRequiredEO>false</isInfoRequiredEO>
      <isOtherInfoRequired>false</isOtherInfoRequired>
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    <signature registrantSignedName="AMERICAN CENTURY ETF TRUST" signature="Amy R. Bitter" title="Assistant Treasurer" signedDate="2018-11-14"/>
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</edgarSubmission>
