<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0001710607</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000068306</seriesId>
        <classId>C000218645</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>American Century ETF Trust</regName>
      <regFileNumber>811-23305</regFileNumber>
      <regCik>0001710607</regCik>
      <regLei>5493006IKK34YJD98183</regLei>
      <regStreet1>4500 Main St</regStreet1>
      <regCity>Kansas City</regCity>
      <regStateConditional regCountry="US" regState="US-MO"/>
      <regZipOrPostalCode>64111</regZipOrPostalCode>
      <regPhone>816-531-5575</regPhone>
      <seriesName>American Century Mid Cap Growth Impact ETF</seriesName>
      <seriesId>S000068306</seriesId>
      <seriesLei>549300RZJCDU6SCEXC76</seriesLei>
      <repPdEnd>2023-08-31</repPdEnd>
      <repPdDate>2023-02-28</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>33525820.520000000000</totAssets>
      <totLiabs>358018.040000000000</totLiabs>
      <netAssets>33167802.480000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.000000000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.000000000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.000000000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.000000000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.000000000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.000000000000</amtPayAftOneYrOther>
      <delayDeliv>0.000000000000</delayDeliv>
      <standByCommit>0.000000000000</standByCommit>
      <liquidPref>0.000000000000</liquidPref>
      <cshNotRptdInCorD>0.000000000000</cshNotRptdInCorD>
      <borrowers>
        <borrower aggrVal="84030.370000000000" lei="549300BLWPABP1VNME36" name="SCOTIA CAPITAL (USA) INC."/>
        <borrower aggrVal="1903.360000000000" lei="549300HN4UKV1E2R3U73" name="BOFA SECURITIES, INC."/>
        <borrower aggrVal="505.580000000000" lei="VYVVCKR63DVZZN70PB21" name="WELLS FARGO SECURITIES, LLC"/>
      </borrowers>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000218645" rtn1="-7.833103807314" rtn2="7.520958604192" rtn3="0.625917660846"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="-155784.8800" netUnrealizedAppr="-2099677.5800"/>
        <othMon2 netRealizedGain="-223978.9100" netUnrealizedAppr="2472472.9800"/>
        <othMon3 netRealizedGain="-874939.7100" netUnrealizedAppr="1066432.6400"/>
      </returnInfo>
      <mon1Flow redemption="0" reinvestment="0" sales="3471044.5"/>
      <mon2Flow redemption="0" reinvestment="0" sales="1645122.5"/>
      <mon3Flow redemption="0" reinvestment="0" sales="1127196"/>



    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Plug Power Inc</name>
        <lei>549300JPDKRSJ8JSM954</lei>
        <title>Plug Power Inc</title>
        <cusip>72919P202</cusip>
        <identifiers>
          <isin value="US72919P2020"/>
          <ticker value="PLUG"/>
          <other otherDesc="SEDOL" value="2508386"/>
        </identifiers>
        <balance>11761.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>174886.0700000000</valUSD>
        <pctVal>0.5272766265</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="86439.310000000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>State Street Navigator Securities Lending Trust - State Street Navigator Securities Lending Government Money Market Portfolio</name>
        <lei>5493008BJIBKQ5KTIF74</lei>
        <title>State Street Navigator Securities Lending Government Money Market Portfolio</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="Series ID" value="S000009767"/>
        </identifiers>
        <balance>87195.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>87195.0000000000</valUSD>
        <pctVal>0.2628904946</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="87195.000000000000" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Airbnb Inc</name>
        <lei>549300HMUDNO0RY56D37</lei>
        <title>Airbnb Inc</title>
        <cusip>009066101</cusip>
        <identifiers>
          <isin value="US0090661010"/>
          <ticker value="ABNB"/>
          <other otherDesc="SEDOL" value="BMGYYH4"/>
        </identifiers>
        <balance>10756.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1325999.6800000000</valUSD>
        <pctVal>3.9978520760</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Albemarle Corp</name>
        <lei>HDBLS2Q6GV1LSKQPBS54</lei>
        <title>Albemarle Corp</title>
        <cusip>012653101</cusip>
        <identifiers>
          <isin value="US0126531013"/>
          <ticker value="ALB"/>
          <other otherDesc="SEDOL" value="2046853"/>
        </identifiers>
        <balance>1115.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>283555.6500000000</valUSD>
        <pctVal>0.8549123813</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Alnylam Pharmaceuticals Inc</name>
        <lei>N/A</lei>
        <title>Alnylam Pharmaceuticals Inc</title>
        <cusip>02043Q107</cusip>
        <identifiers>
          <isin value="US02043Q1076"/>
          <ticker value="ALNY"/>
          <other otherDesc="SEDOL" value="B00FWN1"/>
        </identifiers>
        <balance>2651.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>507533.9500000000</valUSD>
        <pctVal>1.5302007129</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Avient Corp</name>
        <lei>SM8L9RZYIB34LNTWO040</lei>
        <title>Avient Corp</title>
        <cusip>05368V106</cusip>
        <identifiers>
          <isin value="US05368V1061"/>
          <ticker value="AVNT"/>
          <other otherDesc="SEDOL" value="BMHWY55"/>
        </identifiers>
        <balance>21703.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>946901.8900000000</valUSD>
        <pctVal>2.8548828056</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Bio-Techne Corp</name>
        <lei>54930073RLKQ51TILZ35</lei>
        <title>Bio-Techne Corp</title>
        <cusip>09073M104</cusip>
        <identifiers>
          <isin value="US09073M1045"/>
          <ticker value="TECH"/>
          <other otherDesc="SEDOL" value="BSHZ3Q0"/>
        </identifiers>
        <balance>11420.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>829548.8000000000</valUSD>
        <pctVal>2.5010665102</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>CAE Inc</name>
        <lei>549300FFM2BEH2GF1E44</lei>
        <title>CAE Inc</title>
        <cusip>124765108</cusip>
        <identifiers>
          <isin value="CA1247651088"/>
          <ticker value="CAE"/>
          <other otherDesc="SEDOL" value="2125097"/>
        </identifiers>
        <balance>23627.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>533497.6600000000</valUSD>
        <pctVal>1.6084805749</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>CA</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Cadence Design Systems Inc</name>
        <lei>GCT7RXJOGLXPV0NXZY22</lei>
        <title>Cadence Design Systems Inc</title>
        <cusip>127387108</cusip>
        <identifiers>
          <isin value="US1273871087"/>
          <ticker value="CDNS"/>
          <other otherDesc="SEDOL" value="2302232"/>
        </identifiers>
        <balance>12721.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2454389.7400000000</valUSD>
        <pctVal>7.3999166556</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Catalent Inc</name>
        <lei>N/A</lei>
        <title>Catalent Inc</title>
        <cusip>148806102</cusip>
        <identifiers>
          <isin value="US1488061029"/>
          <ticker value="CTLT"/>
          <other otherDesc="SEDOL" value="BP96PQ4"/>
        </identifiers>
        <balance>13952.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>951805.4400000000</valUSD>
        <pctVal>2.8696668722</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Chipotle Mexican Grill Inc</name>
        <lei>N/A</lei>
        <title>Chipotle Mexican Grill Inc</title>
        <cusip>169656105</cusip>
        <identifiers>
          <isin value="US1696561059"/>
          <ticker value="CMG"/>
          <other otherDesc="SEDOL" value="B0X7DZ3"/>
        </identifiers>
        <balance>847.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1262944.7600000000</valUSD>
        <pctVal>3.8077432497</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Cytokinetics Inc</name>
        <lei>549300BE5DY1HW7IHA64</lei>
        <title>Cytokinetics Inc</title>
        <cusip>23282W605</cusip>
        <identifiers>
          <isin value="US23282W6057"/>
          <ticker value="CYTK"/>
          <other otherDesc="SEDOL" value="BBBSBJ5"/>
        </identifiers>
        <balance>13897.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>602573.9200000000</valUSD>
        <pctVal>1.8167435734</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DexCom Inc</name>
        <lei>N/A</lei>
        <title>Dexcom Inc</title>
        <cusip>252131107</cusip>
        <identifiers>
          <isin value="US2521311074"/>
          <ticker value="DXCM"/>
          <other otherDesc="SEDOL" value="B0796X4"/>
        </identifiers>
        <balance>12243.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1359095.4300000000</valUSD>
        <pctVal>4.0976348398</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DocuSign Inc</name>
        <lei>549300Q7PVDWRZ39JG09</lei>
        <title>DocuSign Inc</title>
        <cusip>256163106</cusip>
        <identifiers>
          <isin value="US2561631068"/>
          <ticker value="DOCU"/>
          <other otherDesc="SEDOL" value="BFYT7B7"/>
        </identifiers>
        <balance>7897.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>484480.9500000000</valUSD>
        <pctVal>1.4606965604</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Element Solutions Inc</name>
        <lei>549300FLGN6P5CU20J91</lei>
        <title>Element Solutions Inc</title>
        <cusip>28618M106</cusip>
        <identifiers>
          <isin value="US28618M1062"/>
          <ticker value="ESI"/>
          <other otherDesc="SEDOL" value="BJ1C2K1"/>
        </identifiers>
        <balance>68863.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1414446.0200000000</valUSD>
        <pctVal>4.2645153258</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Enphase Energy Inc</name>
        <lei>5493008U7KIGMI59Z314</lei>
        <title>Enphase Energy Inc</title>
        <cusip>29355A107</cusip>
        <identifiers>
          <isin value="US29355A1079"/>
          <ticker value="ENPH"/>
          <other otherDesc="SEDOL" value="B65SQW4"/>
        </identifiers>
        <balance>8745.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1841084.8500000000</valUSD>
        <pctVal>5.5508195067</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Excelerate Energy Inc</name>
        <lei>N/A</lei>
        <title>Excelerate Energy Inc</title>
        <cusip>30069T101</cusip>
        <identifiers>
          <isin value="US30069T1016"/>
          <ticker value="EE"/>
          <other otherDesc="SEDOL" value="BN2QTD2"/>
        </identifiers>
        <balance>37099.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>801709.3900000000</valUSD>
        <pctVal>2.4171314650</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>IQVIA Holdings Inc</name>
        <lei>549300W3R20NM4KQPH86</lei>
        <title>IQVIA Holdings Inc</title>
        <cusip>46266C105</cusip>
        <identifiers>
          <isin value="US46266C1053"/>
          <ticker value="IQV"/>
          <other otherDesc="SEDOL" value="BDR73G1"/>
        </identifiers>
        <balance>5508.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1148252.7600000000</valUSD>
        <pctVal>3.4619500665</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>IVERIC bio Inc</name>
        <lei>549300GZXI59U71XPM70</lei>
        <title>IVERIC bio Inc</title>
        <cusip>46583P102</cusip>
        <identifiers>
          <isin value="US46583P1021"/>
          <ticker value="ISEE"/>
          <other otherDesc="SEDOL" value="BK8Y8K9"/>
        </identifiers>
        <balance>28025.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>582359.5000000000</valUSD>
        <pctVal>1.7557976606</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Jacobs Solutions Inc</name>
        <lei>N/A</lei>
        <title>Jacobs Solutions Inc</title>
        <cusip>46982L108</cusip>
        <identifiers>
          <isin value="US46982L1089"/>
          <ticker value="J"/>
          <other otherDesc="SEDOL" value="BNGC0D3"/>
        </identifiers>
        <balance>8528.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1019096.0000000000</valUSD>
        <pctVal>3.0725460350</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Keysight Technologies Inc</name>
        <lei>549300GLKVIO8YRCYN02</lei>
        <title>Keysight Technologies Inc</title>
        <cusip>49338L103</cusip>
        <identifiers>
          <isin value="US49338L1035"/>
          <ticker value="KEYS"/>
          <other otherDesc="SEDOL" value="BQZJ0Q9"/>
        </identifiers>
        <balance>10177.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1627912.9200000000</valUSD>
        <pctVal>4.9081120794</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>MSCI Inc</name>
        <lei>549300HTIN2PD78UB763</lei>
        <title>MSCI Inc</title>
        <cusip>55354G100</cusip>
        <identifiers>
          <isin value="US55354G1004"/>
          <ticker value="MSCI"/>
          <other otherDesc="SEDOL" value="B2972D2"/>
        </identifiers>
        <balance>2595.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1354979.2500000000</valUSD>
        <pctVal>4.0852246718</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Manhattan Associates Inc</name>
        <lei>N/A</lei>
        <title>Manhattan Associates Inc</title>
        <cusip>562750109</cusip>
        <identifiers>
          <isin value="US5627501092"/>
          <ticker value="MANH"/>
          <other otherDesc="SEDOL" value="2239471"/>
        </identifiers>
        <balance>11598.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1667212.5000000000</valUSD>
        <pctVal>5.0265992177</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Marvell Technology Inc</name>
        <lei>N/A</lei>
        <title>Marvell Technology Inc</title>
        <cusip>573874104</cusip>
        <identifiers>
          <isin value="US5738741041"/>
          <ticker value="MRVL"/>
          <other otherDesc="SEDOL" value="BNKJSM5"/>
        </identifiers>
        <balance>24760.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1117914.0000000000</valUSD>
        <pctVal>3.3704795507</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Monolithic Power Systems Inc</name>
        <lei>N/A</lei>
        <title>Monolithic Power Systems Inc</title>
        <cusip>609839105</cusip>
        <identifiers>
          <isin value="US6098391054"/>
          <ticker value="MPWR"/>
          <other otherDesc="SEDOL" value="B01Z7J1"/>
        </identifiers>
        <balance>2387.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1156000.2300000000</valUSD>
        <pctVal>3.4853084726</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Palo Alto Networks Inc</name>
        <lei>549300QXR2YVZV231H43</lei>
        <title>Palo Alto Networks Inc</title>
        <cusip>697435105</cusip>
        <identifiers>
          <isin value="US6974351057"/>
          <ticker value="PANW"/>
          <other otherDesc="SEDOL" value="B87ZMX0"/>
        </identifiers>
        <balance>8113.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1528245.8100000000</valUSD>
        <pctVal>4.6076185208</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Republic Services Inc</name>
        <lei>NKNQHM6BLECKVOQP7O46</lei>
        <title>Republic Services Inc</title>
        <cusip>760759100</cusip>
        <identifiers>
          <isin value="US7607591002"/>
          <ticker value="RSG"/>
          <other otherDesc="SEDOL" value="2262530"/>
        </identifiers>
        <balance>4722.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>608807.4600000000</valUSD>
        <pctVal>1.8355375228</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>State Street Institutional US Government Money Market Fund</name>
        <lei>549300BZ5TGIFZUZDZ37</lei>
        <title>State Street Institutional US Government Money Market Fund</title>
        <cusip>857492706</cusip>
        <identifiers>
          <isin value="US8574927062"/>
          <ticker value="GVMXX"/>
          <other otherDesc="SEDOL" value="B284MN4"/>
        </identifiers>
        <balance>19941.5200000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>19941.5200000000</valUSD>
        <pctVal>0.0601231270</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Sarepta Therapeutics Inc</name>
        <lei>549300IKDPIED8J8IG21</lei>
        <title>Sarepta Therapeutics Inc</title>
        <cusip>803607100</cusip>
        <identifiers>
          <isin value="US8036071004"/>
          <ticker value="SRPT"/>
          <other otherDesc="SEDOL" value="B8DPDT7"/>
        </identifiers>
        <balance>9577.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1169639.0100000000</valUSD>
        <pctVal>3.5264290141</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Veeva Systems Inc</name>
        <lei>549300YZEXPDB92M2F02</lei>
        <title>Veeva Systems Inc</title>
        <cusip>922475108</cusip>
        <identifiers>
          <isin value="US9224751084"/>
          <ticker value="VEEV"/>
          <other otherDesc="SEDOL" value="BFH3N85"/>
        </identifiers>
        <balance>1427.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>236396.8200000000</valUSD>
        <pctVal>0.7127298233</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Eaton Corp PLC</name>
        <lei>549300VDIGTMXUNT7H71</lei>
        <title>Eaton Corp PLC</title>
        <cusip>G29183103</cusip>
        <identifiers>
          <isin value="IE00B8KQN827"/>
          <ticker value="ETN"/>
          <other otherDesc="SEDOL" value="B8KQN82"/>
        </identifiers>
        <balance>5296.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>926429.2800000000</valUSD>
        <pctVal>2.7931584571</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Aptiv PLC</name>
        <lei>N/A</lei>
        <title>Aptiv PLC</title>
        <cusip>G6095L109</cusip>
        <identifiers>
          <isin value="JE00B783TY65"/>
          <ticker value="APTV"/>
          <other otherDesc="SEDOL" value="B783TY6"/>
        </identifiers>
        <balance>15530.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1805828.4000000000</valUSD>
        <pctVal>5.4445222926</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>IE</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Trane Technologies PLC</name>
        <lei>N/A</lei>
        <title>Trane Technologies PLC</title>
        <cusip>G8994E103</cusip>
        <identifiers>
          <isin value="IE00BK9ZQ967"/>
          <ticker value="TT"/>
          <other otherDesc="SEDOL" value="BK9ZQ96"/>
        </identifiers>
        <balance>7676.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1419829.7200000000</valUSD>
        <pctVal>4.2807470313</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>IE</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2023-04-26</ncom:dateSigned>
      <ncom:nameOfApplicant>American Century ETF Trust</ncom:nameOfApplicant>
      <ncom:signature>Amy R. Bitter</ncom:signature>
      <ncom:signerName>Amy R. Bitter</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
