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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Lockheed Martin Corp</name>
        <lei>DPRBOZP0K5RM2YE8UU08</lei>
        <title>Lockheed Martin Corp</title>
        <cusip>539830109</cusip>
        <identifiers>
          <isin value="US5398301094"/>
          <ticker value="LMT"/>
          <other otherDesc="SEDOL" value="2522096"/>
        </identifiers>
        <balance>5014.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1830110.0000000000</valUSD>
        <pctVal>0.9220642500</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>Mastercard Inc</name>
        <lei>AR5L2ODV9HN37376R084</lei>
        <title>Mastercard Inc</title>
        <cusip>57636Q104</cusip>
        <identifiers>
          <isin value="US57636Q1040"/>
          <ticker value="MA"/>
          <other otherDesc="SEDOL" value="B121557"/>
        </identifiers>
        <balance>22600.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7605126.0000000000</valUSD>
        <pctVal>3.8316903361</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>Netflix Inc</name>
        <lei>549300Y7VHGU0I7CE873</lei>
        <title>Netflix Inc</title>
        <cusip>64110L106</cusip>
        <identifiers>
          <isin value="US64110L1061"/>
          <ticker value="NFLX"/>
          <other otherDesc="SEDOL" value="2857817"/>
        </identifiers>
        <balance>6887.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3379450.9000000000</valUSD>
        <pctVal>1.7026686152</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>NIKE Inc</name>
        <lei>787RXPR0UX0O0XUXPZ81</lei>
        <title>NIKE Inc</title>
        <cusip>654106103</cusip>
        <identifiers>
          <isin value="US6541061031"/>
          <ticker value="NKE"/>
          <other otherDesc="SEDOL" value="2640147"/>
        </identifiers>
        <balance>21707.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2923932.9000000000</valUSD>
        <pctVal>1.4731649990</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>Okta Inc</name>
        <lei>549300N8J06I8MRHU620</lei>
        <title>Okta Inc</title>
        <cusip>679295105</cusip>
        <identifiers>
          <isin value="US6792951054"/>
          <ticker value="OKTA"/>
          <other otherDesc="SEDOL" value="BDFZSP1"/>
        </identifiers>
        <balance>28729.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7039754.1600000000</valUSD>
        <pctVal>3.5468390640</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>Regeneron Pharmaceuticals Inc</name>
        <lei>549300RCBFWIRX3HYQ56</lei>
        <title>Regeneron Pharmaceuticals Inc</title>
        <cusip>75886F107</cusip>
        <identifiers>
          <isin value="US75886F1075"/>
          <ticker value="REGN"/>
          <other otherDesc="SEDOL" value="2730190"/>
        </identifiers>
        <balance>4513.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2328843.3900000000</valUSD>
        <pctVal>1.1733410744</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>RingCentral Inc</name>
        <lei>549300C8EH0H1614VE84</lei>
        <title>RingCentral Inc</title>
        <cusip>76680R206</cusip>
        <identifiers>
          <isin value="US76680R2067"/>
          <ticker value="RNG"/>
          <other otherDesc="SEDOL" value="BDZCRX3"/>
        </identifiers>
        <balance>11471.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3407460.5500000000</valUSD>
        <pctVal>1.7167807161</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>Ross Stores Inc</name>
        <lei>549300ENZFLPGRDFZQ60</lei>
        <title>Ross Stores Inc</title>
        <cusip>778296103</cusip>
        <identifiers>
          <isin value="US7782961038"/>
          <ticker value="ROST"/>
          <other otherDesc="SEDOL" value="2746711"/>
        </identifiers>
        <balance>32710.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3516979.2000000000</valUSD>
        <pctVal>1.7719594932</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>941015.2300000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>941015.2300000000</valUSD>
        <pctVal>0.4741116666</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>S&amp;P Global Inc</name>
        <lei>Y6X4K52KMJMZE7I7MY94</lei>
        <title>S&amp;P Global Inc</title>
        <cusip>78409V104</cusip>
        <identifiers>
          <isin value="US78409V1044"/>
          <ticker value="SPGI"/>
          <other otherDesc="SEDOL" value="BYV2325"/>
        </identifiers>
        <balance>16227.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5708334.0600000000</valUSD>
        <pctVal>2.8760297269</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>salesforce.com Inc</name>
        <lei>RCGZFPDMRW58VJ54VR07</lei>
        <title>salesforce.com Inc</title>
        <cusip>79466L302</cusip>
        <identifiers>
          <isin value="US79466L3024"/>
          <ticker value="CRM"/>
          <other otherDesc="SEDOL" value="2310525"/>
        </identifiers>
        <balance>37342.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>9178663.6000000000</valUSD>
        <pctVal>4.6244857238</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>Silk Road Medical Inc</name>
        <lei>N/A</lei>
        <title>Silk Road Medical Inc</title>
        <cusip>82710M100</cusip>
        <identifiers>
          <isin value="US82710M1009"/>
          <ticker value="SILK"/>
          <other otherDesc="SEDOL" value="BGHVXJ7"/>
        </identifiers>
        <balance>34585.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1981720.5000000000</valUSD>
        <pctVal>0.9984501623</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>Slack Technologies Inc</name>
        <lei>549300VIZRB02KN4IJ45</lei>
        <title>Slack Technologies Inc</title>
        <cusip>83088V102</cusip>
        <identifiers>
          <isin value="US83088V1026"/>
          <ticker value="WORK"/>
          <other otherDesc="SEDOL" value="BKBS541"/>
        </identifiers>
        <balance>274113.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>11753965.4400000000</valUSD>
        <pctVal>5.9219999494</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>Square Inc</name>
        <lei>549300OHIIUWSTIZME52</lei>
        <title>Square Inc</title>
        <cusip>852234103</cusip>
        <identifiers>
          <isin value="US8522341036"/>
          <ticker value="SQ"/>
          <other otherDesc="SEDOL" value="BYNZGK1"/>
        </identifiers>
        <balance>47073.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>9930520.0800000000</valUSD>
        <pctVal>5.0032935448</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>Tesla Inc</name>
        <lei>54930043XZGB27CTOV49</lei>
        <title>Tesla Inc</title>
        <cusip>88160R101</cusip>
        <identifiers>
          <isin value="US88160R1014"/>
          <ticker value="TSLA"/>
          <other otherDesc="SEDOL" value="B616C79"/>
        </identifiers>
        <balance>25398.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>14415904.8000000000</valUSD>
        <pctVal>7.2631647534</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>Verisk Analytics Inc</name>
        <lei>549300I1YSWNIRKBWP67</lei>
        <title>Verisk Analytics Inc</title>
        <cusip>92345Y106</cusip>
        <identifiers>
          <isin value="US92345Y1064"/>
          <ticker value="VRSK"/>
          <other otherDesc="SEDOL" value="B4P9W92"/>
        </identifiers>
        <balance>13395.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2656362.4500000000</valUSD>
        <pctVal>1.3383549896</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>Visa Inc</name>
        <lei>549300JZ4OKEHW3DPJ59</lei>
        <title>Visa Inc</title>
        <cusip>92826C839</cusip>
        <identifiers>
          <isin value="US92826C8394"/>
          <ticker value="V"/>
          <other otherDesc="SEDOL" value="B2PZN04"/>
        </identifiers>
        <balance>39470.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8302514.5000000000</valUSD>
        <pctVal>4.1830555569</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>Westinghouse Air Brake Technologies Corp</name>
        <lei>06BTX5UWZD0GQ5N5Y745</lei>
        <title>Westinghouse Air Brake Technologies Corp</title>
        <cusip>929740108</cusip>
        <identifiers>
          <isin value="US9297401088"/>
          <ticker value="WAB"/>
          <other otherDesc="SEDOL" value="2955733"/>
        </identifiers>
        <balance>51782.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3795620.6000000000</valUSD>
        <pctVal>1.9123473789</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>2021-01-25</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>
