<?xml version="1.0" encoding="UTF-8"?><ns2:edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns:ns2="http://www.sec.gov/edgar/ownership">
    <ns2:headerData>
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        <ns2:filerInfo>
            <ns2:filer>
                <ns2:filerCredentials>
                    <ns2:cik>2058610</ns2:cik>
                    <ns2:ccc>XXXXXXXX</ns2:ccc>
                </ns2:filerCredentials>
            </ns2:filer>
            <ns2:liveTestFlag>LIVE</ns2:liveTestFlag>



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    <ns2:formData>
        <ns2:issuerInfo>
            <ns2:issuerCik>0001997464</ns2:issuerCik>
            <ns2:issuerName>MAREX GROUP PLC</ns2:issuerName>
            <ns2:secFileNumber>001-42020</ns2:secFileNumber>
            <ns2:issuerAddress>
                <com:street1>155 Bishopsgate</com:street1>
                <com:city>London</com:city>
                <com:stateOrCountry>X0</com:stateOrCountry>
                <com:zipCode>EC2M 3TQ</com:zipCode>
            </ns2:issuerAddress>
            <ns2:issuerContactPhone>44-20-7655-6000</ns2:issuerContactPhone>
            <ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Crispin Robert John Irvin</ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <ns2:relationshipsToIssuer>
                <ns2:relationshipToIssuer>Officer</ns2:relationshipToIssuer>
            </ns2:relationshipsToIssuer>
        </ns2:issuerInfo>
        <ns2:securitiesInformation>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:brokerOrMarketmakerDetails>
                <ns2:name>Goldman Sachs &amp; Co. LLC</ns2:name>
                <ns2:address>
                    <com:street1>200 West Street</com:street1>
                    <com:city>New York</com:city>
                    <com:stateOrCountry>NY</com:stateOrCountry>
                    <com:zipCode>10282</com:zipCode>
                </ns2:address>
            </ns2:brokerOrMarketmakerDetails>
            <ns2:noOfUnitsSold>2477</ns2:noOfUnitsSold>
            <ns2:aggregateMarketValue>78694.29</ns2:aggregateMarketValue>
            <ns2:noOfUnitsOutstanding>70290886</ns2:noOfUnitsOutstanding>
            <ns2:approxSaleDate>03/12/2025</ns2:approxSaleDate>
            <ns2:securitiesExchangeName>NASD</ns2:securitiesExchangeName>
        </ns2:securitiesInformation>
        <ns2:securitiesToBeSold>
            <ns2:securitiesClassTitle>Common Stock</ns2:securitiesClassTitle>
            <ns2:acquiredDate>05/04/2023</ns2:acquiredDate>
            <ns2:natureOfAcquisitionTransaction>Acquired as compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
            <ns2:nameOfPersonfromWhomAcquired>The Issuer</ns2:nameOfPersonfromWhomAcquired>
            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>2477</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>05/04/2023</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
        </ns2:securitiesToBeSold>
        <ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <ns2:remarks>The shares to be sold are not subject to any contractual lock-ups. </ns2:remarks>
        <ns2:noticeSignature>
            <ns2:noticeDate>03/12/2025</ns2:noticeDate>
            <ns2:planAdoptionDates/>
            <ns2:signature>Goldman Sachs &amp; Co. LLC on behalf of Crispin Robert John Irvin</ns2:signature>
        </ns2:noticeSignature>
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144
2058610
XXXXXXXX
LIVE
0001997464
MAREX GROUP PLC
001-42020
155 Bishopsgate
London
X0
EC2M 3TQ
44-20-7655-6000
Crispin Robert John Irvin
Officer
Common Stock
Goldman Sachs & Co. LLC
200 West Street
New York
NY
10282
2477
78694.29
70290886
03/12/2025
NASD
Common Stock
05/04/2023
Acquired as compensation -- Restricted Stock Units
The Issuer
N
2477
05/04/2023
Compensation
Y
The shares to be sold are not subject to any contractual lock-ups.
03/12/2025
Goldman Sachs & Co. LLC on behalf of Crispin Robert John Irvin