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        <pctVal>2.7341852989</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>Cloudflare Inc</name>
        <lei>5493007DY18BGNLDWU14</lei>
        <title>Cloudflare Inc</title>
        <cusip>18915M107</cusip>
        <identifiers>
          <isin value="US18915M1071"/>
          <ticker value="NET"/>
          <other otherDesc="SEDOL" value="BJXC5M2"/>
        </identifiers>
        <balance>33924.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2786517.3600000000</valUSD>
        <pctVal>3.9622037979</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>22386.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1075199.5800000000</valUSD>
        <pctVal>1.5288474138</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>14392.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>997941.2800000000</valUSD>
        <pctVal>1.4189923187</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>13090.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2782541.3000000000</valUSD>
        <pctVal>3.9565501600</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>130130.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3479676.2000000000</valUSD>
        <pctVal>4.9478199752</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>14519.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1757379.7600000000</valUSD>
        <pctVal>2.4988528187</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>3525.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1082633.2500000000</valUSD>
        <pctVal>1.5394174953</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>
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      </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>1760727.2100000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1760727.2100000000</valUSD>
        <pctVal>2.5036126236</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>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>3107.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1495492.3100000000</valUSD>
        <pctVal>2.1264699066</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"/>
        </identifiers>
        <balance>4706.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>954235.6200000000</valUSD>
        <pctVal>1.3568463818</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>4869.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1224796.9500000000</valUSD>
        <pctVal>1.7415628542</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>10148.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1531130.2400000000</valUSD>
        <pctVal>2.1771441797</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>Lennox International Inc</name>
        <lei>S7DWAC87RDMPBF77GJ92</lei>
        <title>Lennox International Inc</title>
        <cusip>526107107</cusip>
        <identifiers>
          <isin value="US5261071071"/>
          <ticker value="LII"/>
          <other otherDesc="SEDOL" value="2442053"/>
        </identifiers>
        <balance>4196.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2476437.2400000000</valUSD>
        <pctVal>3.5212947812</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>7052.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>4094320.6800000000</valUSD>
        <pctVal>5.8217950409</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"/>
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        <balance>8979.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2374316.9700000000</valUSD>
        <pctVal>3.3760879623</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"/>
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        <balance>3186.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2977890.4800000000</valUSD>
        <pctVal>4.2343209983</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>Natera Inc</name>
        <lei>N/A</lei>
        <title>Natera Inc</title>
        <cusip>632307104</cusip>
        <identifiers>
          <isin value="US6323071042"/>
          <ticker value="NTRA"/>
          <other otherDesc="SEDOL" value="BYQRG48"/>
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        <balance>11845.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1400789.7000000000</valUSD>
        <pctVal>1.9918104043</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>
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      </invstOrSec>
      <invstOrSec>
        <name>Pool Corp</name>
        <lei>5493005VZK1KMN6CO617</lei>
        <title>Pool Corp</title>
        <cusip>73278L105</cusip>
        <identifiers>
          <isin value="US73278L1052"/>
          <ticker value="POOL"/>
          <other otherDesc="SEDOL" value="2781585"/>
        </identifiers>
        <balance>7726.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2716616.1200000000</valUSD>
        <pctVal>3.8628098509</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>
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      </invstOrSec>
      <invstOrSec>
        <name>Xylem Inc/NY</name>
        <lei>549300DF5MV96DRYLQ48</lei>
        <title>Xylem Inc/NY</title>
        <cusip>98419M100</cusip>
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          <isin value="US98419M1009"/>
          <ticker value="XYL"/>
          <other otherDesc="SEDOL" value="B3P2CN8"/>
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        <balance>10380.0000000000</balance>
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        <curCd>USD</curCd>
        <valUSD>1427561.4000000000</valUSD>
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        <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>NU Holdings Ltd/Cayman Islands</name>
        <lei>5493002DG1RHWK9W2X27</lei>
        <title>NU Holdings Ltd/Cayman Islands</title>
        <cusip>G6683N103</cusip>
        <identifiers>
          <isin value="KYG6683N1034"/>
          <ticker value="NU"/>
          <other otherDesc="SEDOL" value="BN6NP19"/>
        </identifiers>
        <balance>81338.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1217629.8600000000</valUSD>
        <pctVal>1.7313718281</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>BR</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2024-10-28</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>
