<?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">
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    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0001976322</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000100562</seriesId>
        <classId>C000270386</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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      <regName>Themes ETF Trust</regName>
      <regFileNumber>811-23872</regFileNumber>
      <regCik>0001976322</regCik>
      <regLei>529900NYKGD1N3B8DB45</regLei>
      <regStreet1>34 East Putnam Avenue</regStreet1>
      <regStreet2>Suite 112</regStreet2>
      <regCity>Greenwich</regCity>
      <regStateConditional regCountry="US" regState="US-CT"/>
      <regZipOrPostalCode>06830</regZipOrPostalCode>
      <regPhone>646-206-1788</regPhone>
      <seriesName>Leverage Shares 2X Long UUUU Daily ETF</seriesName>
      <seriesId>S000100562</seriesId>
      <seriesLei>529900Q9MB078MFLA276</seriesLei>
      <repPdEnd>2026-10-31</repPdEnd>
      <repPdDate>2026-01-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>14936882.230000000000</totAssets>
      <totLiabs>2469512.580000000000</totLiabs>
      <netAssets>12467369.650000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.000000000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.000000000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.000000000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.000000000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.000000000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.000000000000</amtPayAftOneYrOther>
      <delayDeliv>0.000000000000</delayDeliv>
      <standByCommit>0.000000000000</standByCommit>
      <liquidPref>0.000000000000</liquidPref>
      <cshNotRptdInCorD>11538818.140000000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
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        </monthlyTotReturns>
        <monthlyReturnCats>
          <equityContracts>
            <mon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
            <mon3 netRealizedGain="169.550000000000" netUnrealizedAppr="-2508845.990000000000"/>
            <swapCategory>
              <instrMon1 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
              <instrMon2 netRealizedGain="N/A" netUnrealizedAppr="N/A"/>
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          </equityContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="0" netUnrealizedAppr="0"/>
        <othMon2 netRealizedGain="0" netUnrealizedAppr="0"/>
        <othMon3 netRealizedGain="0" netUnrealizedAppr="0"/>
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      <mon1Flow redemption="0" reinvestment="0" sales="0"/>
      <mon2Flow redemption="0" reinvestment="0" sales="0"/>
      <mon3Flow redemption="416026.000000000000" reinvestment=".000000000000" sales="15392823.000000000000"/>


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        <fundsDesignatedInfo>
          <nameDesignatedIndex>UUUU US Equity</nameDesignatedIndex>
          <indexIdentifier>UUUU</indexIdentifier>

        </fundsDesignatedInfo>

      </varInfo>
    </fundInfo>
    <invstOrSecs>
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        </identifiers>
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        <units>NC</units>
        <curCd>USD</curCd>
        <valUSD>-435218.240000000000</valUSD>
        <pctVal>-3.4908585549</pctVal>
        <payoffProfile>N/A</payoffProfile>
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        <issuerConditional desc="N/A" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>CLEAR STREET LLC</counterpartyName>
              <counterpartyLei>549300KNQS43Y7TO3X67</counterpartyLei>
            </counterparties>
            <descRefInstrmnt>
              <otherRefInst>
                <issuerName>Energy Fuels Inc/Canada</issuerName>
                <issueTitle>Energy Fuels Inc/Canada</issueTitle>
                <identifiers>
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                  <ticker value="UUUU"/>
                </identifiers>
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            </descRefInstrmnt>
            <swapFlag>Y</swapFlag>
            <otherRecDesc fixedOrFloating="Other">UNREALIZED GAIN/LOSS AND INCOME/EXPENSE FROM UNDERLYING</otherRecDesc>
            <floatingPmntDesc curCd="USD" fixedOrFloating="Floating" floatingRtIndex="OBFR01 INDEX" floatingRtSpread="8.000000000000" pmntAmt="6470.190000000000">
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                <rtResetTenor rateTenor="Month" rateTenorUnit="1" resetDt="Month" resetDtUnit="1"/>
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            </floatingPmntDesc>
            <terminationDt>2027-02-17</terminationDt>
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            <pmntCurCd>USD</pmntCurCd>
            <upfrontRcpt>0.000000000000</upfrontRcpt>
            <rcptCurCd>USD</rcptCurCd>
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            <curCd>USD</curCd>
            <unrealizedAppr>-435218.240000000000</unrealizedAppr>
          </swapDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>N/A</name>
        <lei>N/A</lei>
        <title>ENERGY FUELS INC SWAP MAREX</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="USER DEFINED" value="292671708-TRS-03/31/27MAR"/>
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        <units>NC</units>
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        <pctVal>-16.5153713879</pctVal>
        <payoffProfile>N/A</payoffProfile>
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        <issuerConditional desc="N/A" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>MAREX CAPITAL MARKETS INC.</counterpartyName>
              <counterpartyLei>5493006BWPDUCYG6EQ34</counterpartyLei>
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            <descRefInstrmnt>
              <otherRefInst>
                <issuerName>Energy Fuels Inc/Canada</issuerName>
                <issueTitle>Energy Fuels Inc/Canada</issueTitle>
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                  <isin value="CA2926717083"/>
                  <ticker value="UUUU"/>
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            <swapFlag>Y</swapFlag>
            <otherRecDesc fixedOrFloating="Other">UNREALIZED GAIN/LOSS AND INCOME/EXPENSE FROM UNDERLYING</otherRecDesc>
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              <rtResetTenors>
                <rtResetTenor rateTenor="Month" rateTenorUnit="1" resetDt="Month" resetDtUnit="1"/>
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          </swapDeriv>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>First American Treasury Obliga</name>
        <lei>549300UU586IAH2B8H03</lei>
        <title>First American Treasury Obligations Fund</title>
        <cusip>31846V328</cusip>
        <identifiers>
          <isin value="US31846V3289"/>
          <ticker value="FXFXX"/>
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        <balance>1570218.860000000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1570218.860000000000</valUSD>
        <pctVal>12.5946282502</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>N/A</name>
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        <identifiers>
          <other otherDesc="USER DEFINED" value="292671708-TRS-03/31/27CF"/>
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        <units>NC</units>
        <curCd>USD</curCd>
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        <payoffProfile>N/A</payoffProfile>
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        <issuerConditional desc="N/A" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>CANTOR FITZGERALD &amp; CO.</counterpartyName>
              <counterpartyLei>5493004J7H4GCPG6OB62</counterpartyLei>
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            <descRefInstrmnt>
              <otherRefInst>
                <issuerName>Energy Fuels Inc/Canada</issuerName>
                <issueTitle>Energy Fuels Inc/Canada</issueTitle>
                <identifiers>
                  <cusip value="292671708"/>
                  <isin value="CA2926717083"/>
                  <ticker value="UUUU"/>
                </identifiers>
              </otherRefInst>
            </descRefInstrmnt>
            <swapFlag>Y</swapFlag>
            <otherRecDesc fixedOrFloating="Other">UNREALIZED GAIN/LOSS AND INCOME/EXPENSE FROM UNDERLYING</otherRecDesc>
            <floatingPmntDesc curCd="USD" fixedOrFloating="Floating" floatingRtIndex="OBFR01 INDEX" floatingRtSpread="11.000000000000" pmntAmt="902.140000000000">
              <rtResetTenors>
                <rtResetTenor rateTenor="Month" rateTenorUnit="1" resetDt="Month" resetDtUnit="1"/>
              </rtResetTenors>
            </floatingPmntDesc>
            <terminationDt>2027-03-31</terminationDt>
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            <pmntCurCd>USD</pmntCurCd>
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            <rcptCurCd>USD</rcptCurCd>
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            <curCd>USD</curCd>
            <unrealizedAppr>-14598.510000000000</unrealizedAppr>
          </swapDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2026-03-26</ncom:dateSigned>
      <ncom:nameOfApplicant>Themes ETF Trust</ncom:nameOfApplicant>
      <ncom:signature>/s/ Dobromir Kamburov</ncom:signature>
      <ncom:signerName>Dobromir Kamburov</ncom:signerName>
      <ncom:title>Treasurer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
