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      </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>948.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>368241.1200000000</valUSD>
        <pctVal>2.0413397493</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>2303.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>692949.6700000000</valUSD>
        <pctVal>3.8413572761</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>977.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>410076.2100000000</valUSD>
        <pctVal>2.2732520141</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>4040.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>398263.2000000000</valUSD>
        <pctVal>2.2077667504</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>2466.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>482300.2800000000</valUSD>
        <pctVal>2.6736251853</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>477.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>292310.3700000000</valUSD>
        <pctVal>1.6204186470</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>1782.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>488713.5000000000</valUSD>
        <pctVal>2.7091767850</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>2130.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>206524.8000000000</valUSD>
        <pctVal>1.1448674810</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>3672.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>641828.8800000000</valUSD>
        <pctVal>3.5579698569</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>6042.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>231227.3400000000</valUSD>
        <pctVal>1.2818056828</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>20179.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>707273.9500000000</valUSD>
        <pctVal>3.9207637317</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>7675.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>622289.0000000000</valUSD>
        <pctVal>3.4496507920</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>985.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>822475.0000000000</valUSD>
        <pctVal>4.5593792196</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>2458.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>424447.4400000000</valUSD>
        <pctVal>2.3529187364</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>Vertex Pharmaceuticals Inc</name>
        <lei>54930015RAQRRZ5ZGJ91</lei>
        <title>Vertex Pharmaceuticals Inc</title>
        <cusip>92532F100</cusip>
        <identifiers>
          <isin value="US92532F1003"/>
          <ticker value="VRTX"/>
          <other otherDesc="SEDOL" value="2931034"/>
        </identifiers>
        <balance>500.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>143980.0000000000</valUSD>
        <pctVal>0.7981512144</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>4355.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>850270.2000000000</valUSD>
        <pctVal>4.7134615410</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>8027.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>490208.8900000000</valUSD>
        <pctVal>2.7174664596</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>2020-07-23</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>
