<?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>2023-05-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>38231821.060000000000</totAssets>
      <totLiabs>15448.290000000000</totLiabs>
      <netAssets>38216372.770000000000</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="1148.160000000000" lei="549300HN4UKV1E2R3U73" name="BOFA SECURITIES, INC."/>
      </borrowers>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000218645" rtn1="1.591427309276" rtn2="-3.310661978667" rtn3="1.522467928917"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="-119278.1400" netUnrealizedAppr="697925.9700"/>
        <othMon2 netRealizedGain="-162000.8600" netUnrealizedAppr="-1060677.6700"/>
        <othMon3 netRealizedGain="-249261.1000" netUnrealizedAppr="821149.2400"/>
      </returnInfo>
      <mon1Flow redemption="0.0000" reinvestment="0.0000" sales="2672810.5000"/>
      <mon2Flow redemption="215481.0000" reinvestment="0.0000" sales="1781905.5000"/>
      <mon3Flow redemption="0.0000" reinvestment="0.0000" sales="872478.5000"/>



    </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>13366.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>111205.1200000000</valUSD>
        <pctVal>0.2909881602</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="1148.160000000000"/>
        </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>1276.5000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1276.5000000000</valUSD>
        <pctVal>0.0033401914</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="1276.500000000000" 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>12402.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1361367.5400000000</valUSD>
        <pctVal>3.5622625627</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>29951.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1093211.5000000000</valUSD>
        <pctVal>2.8605841443</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>N/A</lei>
        <title>Bio-Techne Corp</title>
        <cusip>09073M104</cusip>
        <identifiers>
          <isin value="US09073M1045"/>
          <ticker value="TECH"/>
          <other otherDesc="SEDOL" value="BSHZ3Q0"/>
        </identifiers>
        <balance>17922.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1465840.3800000000</valUSD>
        <pctVal>3.8356345036</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>29951.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>613396.4800000000</valUSD>
        <pctVal>1.6050620076</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>12162.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2808327.4200000000</valUSD>
        <pctVal>7.3484928486</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>978.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2030807.2200000000</valUSD>
        <pctVal>5.3139716640</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>33199.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1251270.3100000000</valUSD>
        <pctVal>3.2741733956</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>14115.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1655124.9000000000</valUSD>
        <pctVal>4.3309314308</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>9107.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>513634.8000000000</valUSD>
        <pctVal>1.3440176625</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>79481.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1425094.3300000000</valUSD>
        <pctVal>3.7290151490</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>7514.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1306534.3200000000</valUSD>
        <pctVal>3.4187815988</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>42792.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>794219.5200000000</valUSD>
        <pctVal>2.0782179533</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>11614.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2286912.7400000000</valUSD>
        <pctVal>5.9841177334</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>9843.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1078792.8000000000</valUSD>
        <pctVal>2.8228550273</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>9359.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1514286.2000000000</valUSD>
        <pctVal>3.9624016887</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>2993.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1408296.2900000000</valUSD>
        <pctVal>3.6850600618</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>12103.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2195726.2600000000</valUSD>
        <pctVal>5.7455119386</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>35876.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2098387.2400000000</valUSD>
        <pctVal>5.4908069184</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>3362.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1647077.4200000000</valUSD>
        <pctVal>4.3098737547</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>9346.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1994342.9400000000</valUSD>
        <pctVal>5.2185563293</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>7836.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1109812.6800000000</valUSD>
        <pctVal>2.9040241121</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>911956.8900000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>911956.8900000000</valUSD>
        <pctVal>2.3862989182</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>10880.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1344768.0000000000</valUSD>
        <pctVal>3.5188268863</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>4335.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>762526.5000000000</valUSD>
        <pctVal>1.9952874769</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>18589.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1637319.1200000000</valUSD>
        <pctVal>4.2843394109</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>8872.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1448176.5600000000</valUSD>
        <pctVal>3.7894139476</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>On Holding AG</name>
        <lei>N/A</lei>
        <title>On Holding AG</title>
        <cusip>H5919C104</cusip>
        <identifiers>
          <isin value="CH1134540470"/>
          <ticker value="ONON"/>
          <other otherDesc="SEDOL" value="BPF0FP9"/>
        </identifiers>
        <balance>12725.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>349301.2500000000</valUSD>
        <pctVal>0.9140094276</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>CH</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2023-07-24</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>
  <documents>XXXX</documents>
</edgarSubmission>
