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      <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>2022-11-30</repPdDate>
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      <totLiabs>391100.500000000000</totLiabs>
      <netAssets>26743901.900000000000</netAssets>
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      <assetsInvested>0.000000000000</assetsInvested>
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        <name>State Street Navigator Securities Lending Trust - State Street Navigator Securities Lending Government Money Market Portfolio</name>
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        <name>Airbnb Inc</name>
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        <name>Albemarle Corp</name>
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        <name>Alnylam Pharmaceuticals Inc</name>
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        <invCountry>CA</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

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        <name>Cadence Design Systems Inc</name>
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        <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>
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        <name>Catalent Inc</name>
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        <name>Chipotle Mexican Grill Inc</name>
        <lei>N/A</lei>
        <title>Chipotle Mexican Grill Inc</title>
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        <name>DocuSign Inc</name>
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        <name>Element Solutions Inc</name>
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        <name>Enphase Energy Inc</name>
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        <title>Enphase Energy Inc</title>
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        <isRestrictedSec>N</isRestrictedSec>

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        <name>IQVIA Holdings Inc</name>
        <lei>549300W3R20NM4KQPH86</lei>
        <title>IQVIA Holdings Inc</title>
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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
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        <name>Jacobs Solutions Inc</name>
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        <title>Jacobs Solutions Inc</title>
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        <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>8170.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1477871.3000000000</valUSD>
        <pctVal>5.5260122682</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>Lyft Inc</name>
        <lei>549300H7I5VN334XVZ52</lei>
        <title>Lyft Inc</title>
        <cusip>55087P104</cusip>
        <identifiers>
          <isin value="US55087P1049"/>
          <ticker value="LYFT"/>
          <other otherDesc="SEDOL" value="BJT1RW7"/>
        </identifiers>
        <balance>16407.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>184086.5400000000</valUSD>
        <pctVal>0.6883308976</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>2083.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1057809.8900000000</valUSD>
        <pctVal>3.9553311778</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>9322.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1174012.6800000000</valUSD>
        <pctVal>4.3898331829</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>19922.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>926771.4400000000</valUSD>
        <pctVal>3.4653561154</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>1919.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>732981.2400000000</valUSD>
        <pctVal>2.7407415819</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>6518.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1107408.2000000000</valUSD>
        <pctVal>4.1407876986</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>2899.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>403801.7100000000</valUSD>
        <pctVal>1.5098833054</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>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>7712.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>947110.7200000000</valUSD>
        <pctVal>3.5414081443</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>SeaGen Inc</name>
        <lei>N/A</lei>
        <title>Seagen Inc</title>
        <cusip>81181C104</cusip>
        <identifiers>
          <isin value="US81181C1045"/>
          <ticker value="SGEN"/>
          <other otherDesc="SEDOL" value="BLPK4D2"/>
        </identifiers>
        <balance>2715.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>329573.8500000000</valUSD>
        <pctVal>1.2323327061</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>Veeva Systems Inc</name>
        <lei>549300YZEXPDB92M2F02</lei>
        <title>Veeva Systems Inc</title>
        <cusip>922475108</cusip>
        <identifiers>
          <isin value="US9224751084"/>
          <ticker value="VEEV"/>
          <other otherDesc="SEDOL" value="BFH3N85"/>
        </identifiers>
        <balance>4252.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>809410.7200000000</valUSD>
        <pctVal>3.0265244130</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>4264.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>696950.8000000000</valUSD>
        <pctVal>2.6060176357</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>Horizon Therapeutics Plc</name>
        <lei>N/A</lei>
        <title>Horizon Therapeutics Plc</title>
        <cusip>G46188101</cusip>
        <identifiers>
          <isin value="IE00BQPVQZ61"/>
          <ticker value="HZNP"/>
          <other otherDesc="SEDOL" value="BQPVQZ6"/>
        </identifiers>
        <balance>7952.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>797506.0800000000</valUSD>
        <pctVal>2.9820109384</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>9596.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1023605.3200000000</valUSD>
        <pctVal>3.8274344702</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>6922.0000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1235023.2400000000</valUSD>
        <pctVal>4.6179620484</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>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2023-01-19</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>
