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        <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>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>18949.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1462673.3100000000</valUSD>
        <pctVal>2.2308970405</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>Bright Horizons Family Solutions Inc</name>
        <lei>N/A</lei>
        <title>Bright Horizons Family Solutions Inc</title>
        <cusip>109194100</cusip>
        <identifiers>
          <isin value="US1091941005"/>
          <ticker value="BFAM"/>
          <other otherDesc="SEDOL" value="B7MJWP2"/>
        </identifiers>
        <balance>19452.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2044794.2400000000</valUSD>
        <pctVal>3.1187589104</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>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>12286.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3517604.6600000000</valUSD>
        <pctVal>5.3651172631</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>749.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2344010.4800000000</valUSD>
        <pctVal>3.5751291878</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>Church &amp; Dwight Co Inc</name>
        <lei>POOXSI30AWAQGYJZC921</lei>
        <title>Church &amp; Dwight Co Inc</title>
        <cusip>171340102</cusip>
        <identifiers>
          <isin value="US1713401024"/>
          <ticker value="CHD"/>
          <other otherDesc="SEDOL" value="2195841"/>
        </identifiers>
        <balance>18713.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2002478.1300000000</valUSD>
        <pctVal>3.0542175778</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>Core &amp; Main Inc</name>
        <lei>N/A</lei>
        <title>Core &amp; Main Inc</title>
        <cusip>21874C102</cusip>
        <identifiers>
          <isin value="US21874C1027"/>
          <ticker value="CNM"/>
          <other otherDesc="SEDOL" value="BNXKS92"/>
        </identifiers>
        <balance>22226.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1279328.5600000000</valUSD>
        <pctVal>1.9512561547</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>17187.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2041299.9900000000</valUSD>
        <pctVal>3.1134294141</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>Duolingo Inc</name>
        <lei>N/A</lei>
        <title>Duolingo Inc</title>
        <cusip>26603R106</cusip>
        <identifiers>
          <isin value="US26603R1068"/>
          <ticker value="DUOL"/>
          <other otherDesc="SEDOL" value="BMCM6P4"/>
        </identifiers>
        <balance>8733.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1671496.2000000000</valUSD>
        <pctVal>2.5493976682</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>108127.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2598291.8100000000</valUSD>
        <pctVal>3.9629638893</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>11072.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1416108.8000000000</valUSD>
        <pctVal>2.1598759678</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>Equifax Inc</name>
        <lei>5493004MCF8JDC86VS77</lei>
        <title>Equifax Inc</title>
        <cusip>294429105</cusip>
        <identifiers>
          <isin value="US2944291051"/>
          <ticker value="EFX"/>
          <other otherDesc="SEDOL" value="2319146"/>
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        <balance>3000.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>694170.0000000000</valUSD>
        <pctVal>1.0587612340</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>81401.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1449751.8100000000</valUSD>
        <pctVal>2.2111889240</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>GE HealthCare Technologies Inc</name>
        <lei>549300OI9J7XOWZMUN85</lei>
        <title>GE HealthCare Technologies Inc</title>
        <cusip>36266G107</cusip>
        <identifiers>
          <isin value="US36266G1076"/>
          <ticker value="GEHC"/>
          <other otherDesc="SEDOL" value="BL6JPG8"/>
        </identifiers>
        <balance>15641.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1219998.0000000000</valUSD>
        <pctVal>1.8607640606</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>Hubbell Inc</name>
        <lei>54930088VDQ6840Y6597</lei>
        <title>Hubbell Inc</title>
        <cusip>443510607</cusip>
        <identifiers>
          <isin value="US4435106079"/>
          <ticker value="HUBB"/>
          <other otherDesc="SEDOL" value="BDFG6S3"/>
        </identifiers>
        <balance>4575.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1779171.7500000000</valUSD>
        <pctVal>2.7136264568</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>IDEXX Laboratories Inc</name>
        <lei>OGMTXK0LUU1HKV2P0J84</lei>
        <title>IDEXX Laboratories Inc</title>
        <cusip>45168D104</cusip>
        <identifiers>
          <isin value="US45168D1046"/>
          <ticker value="IDXX"/>
          <other otherDesc="SEDOL" value="2459202"/>
        </identifiers>
        <balance>3079.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1530109.0500000000</valUSD>
        <pctVal>2.3337513087</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>Inspire Medical Systems Inc</name>
        <lei>549300XQQCQ7HCJKTW25</lei>
        <title>Inspire Medical Systems Inc</title>
        <cusip>457730109</cusip>
        <identifiers>
          <isin value="US4577301090"/>
          <ticker value="INSP"/>
          <other otherDesc="SEDOL" value="BDT5KT5"/>
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        <balance>5404.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>858101.1600000000</valUSD>
        <pctVal>1.3087921447</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>Insulet Corp</name>
        <lei>549300TZTYD2PYN92D43</lei>
        <title>Insulet Corp</title>
        <cusip>45784P101</cusip>
        <identifiers>
          <isin value="US45784P1012"/>
          <ticker value="PODD"/>
          <other otherDesc="SEDOL" value="B1XGNW4"/>
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        <balance>6156.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1090781.6400000000</valUSD>
        <pctVal>1.6636808205</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>8809.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1929963.8100000000</valUSD>
        <pctVal>2.9436173632</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"/>
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        <balance>10077.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1404129.1800000000</valUSD>
        <pctVal>2.1416044244</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>11981.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1659128.8800000000</valUSD>
        <pctVal>2.5305347975</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>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2024-07-23</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>
