<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>
      
      <filer>
        <issuerCredentials>
          <cik>0001579881</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      
      
      <seriesClassInfo>
        <seriesId>S000102567</seriesId>
        <classId>C000273069</classId>
      </seriesClassInfo>
      
      
    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>Calamos ETF Trust</regName>
      <regFileNumber>811-22887</regFileNumber>
      <regCik>0001579881</regCik>
      <regLei>549300B2KP9WEFDULJ54</regLei>
      <regStreet1>2020 CALAMOS COURT</regStreet1>
      <regCity>NAPERVILLE</regCity>
      <regStateConditional regCountry="US" regState="US-IL"/>
      <regZipOrPostalCode>60563</regZipOrPostalCode>
      <regPhone>630-245-7200</regPhone>
      <seriesName>Calamos Autocallable Growth ETF</seriesName>
      <seriesId>S000102567</seriesId>
      <seriesLei>5299001ILJSKQ75FM792</seriesLei>
      <repPdEnd>2026-07-31</repPdEnd>
      <repPdDate>2026-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>13702676.80</totAssets>
      <totLiabs>12930.30</totLiabs>
      <netAssets>13689746.50</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>184528.79000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000273069" rtn1="N/A" rtn2="N/A" rtn3="4.32000000"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <equityContracts>
            <mon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon3 netRealizedGain="0.00000000" netUnrealizedAppr="368431.42000000"/>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="368431.42000000"/>
            </swapCategory>
          </equityContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="8323.34000000"/>
      </returnInfo>
      <mon1Flow redemption="N/A" reinvestment="N/A" sales="N/A"/>
      <mon2Flow redemption="N/A" reinvestment="N/A" sales="N/A"/>
      <mon3Flow redemption="0.00000000" reinvestment="0.00000000" sales="13316968.48000000"/>
      
      
      <varInfo>
        
        <fundsDesignatedInfo>
          <nameDesignatedIndex>MerQube US Large-Cap Vol Advantage Autocallable Index</nameDesignatedIndex>
          <indexIdentifier>MerQube US Large-Cap Vol Advantage Autocallable Index</indexIdentifier>
          
        </fundsDesignatedInfo>
        
      </varInfo>
    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Calamos Tax-Aware Collateral ETF</name>
        <lei>529900YEZN1C0XQHEE23</lei>
        <title>Calamos Tax-Aware Collateral ETF</title>
        <cusip>12811T514</cusip>
        <identifiers>
          <isin value="US12811T5149"/>
        </identifiers>
        <balance>108413.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>10859188.15000000</valUSD>
        <pctVal>79.32351523090</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</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>JPMorgan Chase Bank NA</name>
        <lei>7H6GLXDRUGQFU57RNE97</lei>
        <title>Long: 530872512 TRS USD R E TRS REC MQAUTOCG  JPM / Short: 530872512 TRS USD P V 00MSOFR TRS PAY SOFR +10BP JPM</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="530872512"/>
        </identifiers>
        <balance>13318049.09000000</balance>
        <units>OU</units>
        <descOthUnits>Notional Amount</descOthUnits>
        <curCd>USD</curCd>
        <valUSD>368431.42000000</valUSD>
        <pctVal>2.691294685405</pctVal>
        <payoffProfile>N/A</payoffProfile>
        <assetCat>DE</assetCat>
        <issuerConditional desc="derivative" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>JPMorgan Chase Bank NA</counterpartyName>
              <counterpartyLei>7H6GLXDRUGQFU57RNE97</counterpartyLei>
            </counterparties>
            <descRefInstrmnt>
              <indexBasketInfo>
                <indexName>MerQube U.S. Large-Cap Vol Advantage Autocallable Growth Index</indexName>
                <indexIdentifier>MQAUTOCG Index</indexIdentifier>
              </indexBasketInfo>
            </descRefInstrmnt>
            <swapFlag>Y</swapFlag>
            <otherRecDesc fixedOrFloating="Other">equity-performance leg</otherRecDesc>
            <floatingPmntDesc curCd="USD" fixedOrFloating="Floating" floatingRtIndex="1 day USD SOFR" floatingRtSpread="0.10000000" pmntAmt="-11016.06000000">
              <rtResetTenors>
                <rtResetTenor rateTenor="Day" rateTenorUnit="1" resetDt="Month" resetDtUnit="12"/>
              </rtResetTenors>
            </floatingPmntDesc>
            <terminationDt>2027-05-28</terminationDt>
            <upfrontPmnt>0.00000000</upfrontPmnt>
            <pmntCurCd>USD</pmntCurCd>
            <upfrontRcpt>0.00000000</upfrontRcpt>
            <rcptCurCd>USD</rcptCurCd>
            <notionalAmt>13318049.09000000</notionalAmt>
            <curCd>USD</curCd>
            <unrealizedAppr>368431.42000000</unrealizedAppr>
          </swapDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States Treasury</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. Treasury Bills</title>
        <cusip>912797TN7</cusip>
        <identifiers>
          <isin value="US912797TN70"/>
        </identifiers>
        <balance>2308000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>2290528.44000000</valUSD>
        <pctVal>16.73170821680</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-07-16</maturityDt>
          <couponKind>None</couponKind>
          <annualizedRt>0.00000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2026-06-11</ncom:dateSigned>
      <ncom:nameOfApplicant>Calamos ETF Trust</ncom:nameOfApplicant>
      <ncom:signature>Stephen Atkins</ncom:signature>
      <ncom:signerName>Stephen Atkins</ncom:signerName>
      <ncom:title>Treasurer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
