content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001654997</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001439095</issuerCik>
        <issuerName>MRC GLOBAL INC.</issuerName>
        <secFileNumber>001-35479</secFileNumber>
        <issuerAddress>
          <com:street1>FULBRIGHT TOWER</com:street1>
          <com:street2>1301 MCKINNEY STREET, SUITE 2300</com:street2>
          <com:city>HOUSTON</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77010</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>877.294.7574</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Bates Grant R</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>4698</noOfUnitsSold>
        <aggregateMarketValue>64649.06</aggregateMarketValue>
        <noOfUnitsOutstanding>85076144</noOfUnitsOutstanding>
        <approxSaleDate>05/17/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/17/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>83</amountOfSecuritiesAcquired>
        <paymentDate>02/17/2016</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/18/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>413</amountOfSecuritiesAcquired>
        <paymentDate>02/18/2016</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/26/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vestin</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>292</amountOfSecuritiesAcquired>
        <paymentDate>02/26/2017</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/27/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vestin</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3910</amountOfSecuritiesAcquired>
        <paymentDate>02/27/2017</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/16/2024</noticeDate>
        <signature>/s/ Bradley Camilo, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Grant Bates</signature>
      </noticeSignature>
    </formData>
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text: 144
  0001654997
  XXXXXXXX
  LIVE
  0001439095
  MRC GLOBAL INC.
  001-35479
  FULBRIGHT TOWER
  1301 MCKINNEY STREET, SUITE 2300
  HOUSTON
  TX
  77010
  877.294.7574
  Bates Grant R
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  4698
  64649.06
  85076144
  05/17/2024
  NYSE
  Common
  02/17/2016
  Restricted Stock Vesting
  Issuer
  N
  83
  02/17/2016
  Compensation
  Common
  02/18/2016
  Restricted Stock Vesting
  Issuer
  N
  413
  02/18/2016
  Compensation
  Common
  02/26/2017
  Restricted Stock Vestin
  Issuer
  N
  292
  02/26/2017
  Compensation
  Common
  02/27/2017
  Restricted Stock Vestin
  Issuer
  N
  3910
  02/27/2017
  Compensation
  Y
  05/16/2024
  /s/ Bradley Camilo, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Grant Bates