<?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>S000096600</seriesId>
        <classId>C000265495</classId>
      </seriesClassInfo>
      
      
    </filerInfo>
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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 OKTA Daily ETF</seriesName>
      <seriesId>S000096600</seriesId>
      <seriesLei>529900Z8H02SSE6PHY23</seriesLei>
      <repPdEnd>2026-10-31</repPdEnd>
      <repPdDate>2026-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>8266.800000000000</totLiabs>
      <netAssets>907956.230000000000</netAssets>
      <assetsAttrMiscSec>0.000000000000</assetsAttrMiscSec>
      <assetsInvested>0.000000000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.000000000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.000000000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.000000000000</amtPayOneYrOthAffil>
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      <amtPayAftOneYrBanksBorr>0.000000000000</amtPayAftOneYrBanksBorr>
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      <amtPayAftOneYrOther>0.000000000000</amtPayAftOneYrOther>
      <delayDeliv>0.000000000000</delayDeliv>
      <standByCommit>0.000000000000</standByCommit>
      <liquidPref>0.000000000000</liquidPref>
      <cshNotRptdInCorD>691558.850000000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
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        <monthlyReturnCats>
          <equityContracts>
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        <othMon2 netRealizedGain="0" netUnrealizedAppr="0"/>
        <othMon3 netRealizedGain="0" netUnrealizedAppr="0"/>
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      <mon3Flow redemption="106422.000000000000" reinvestment=".000000000000" sales="453082.500000000000"/>
      
      
      
      <varInfo>
        
        <fundsDesignatedInfo>
          <nameDesignatedIndex>OKTA US Equity</nameDesignatedIndex>
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        </fundsDesignatedInfo>
        
      </varInfo>
    </fundInfo>
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      <invstOrSec>
        <name>First American Treasury Obliga</name>
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        <title>First American Treasury Obligations Fund</title>
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          <ticker value="FXFXX"/>
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        <issuerCat>RF</issuerCat>
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        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
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      </invstOrSec>
      <invstOrSec>
        <name>N/A</name>
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        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
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          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>MAREX CAPITAL MARKETS INC.</counterpartyName>
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                <issuerName>Okta Inc</issuerName>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>N/A</name>
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        <title>OKTA, INC.-SWAP-JNST-L</title>
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        <issuerConditional desc="N/A" issuerCat="OTHER"/>
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        <fairValLevel>2</fairValLevel>
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              <counterpartyName>JANE STREET EXECUTION SERVICES LLC</counterpartyName>
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        <name>N/A</name>
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                <issuerName>Okta Inc</issuerName>
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      </invstOrSec>
      <invstOrSec>
        <name>N/A</name>
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        <fairValLevel>2</fairValLevel>
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              <counterpartyName>CANTOR FITZGERALD &amp; CO.</counterpartyName>
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            <swapFlag>Y</swapFlag>
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            <floatingPmntDesc curCd="USD" fixedOrFloating="Floating" floatingRtIndex="OBFR01 INDEX" floatingRtSpread="5.000000000000" pmntAmt="924.920000000000">
              <rtResetTenors>
                <rtResetTenor rateTenor="Month" rateTenorUnit="1" resetDt="Month" resetDtUnit="1"/>
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        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2026-06-23</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>
</edgarSubmission>
