content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <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>35000</noOfUnitsSold>
        <aggregateMarketValue>474977.13</aggregateMarketValue>
        <noOfUnitsOutstanding>85076144</noOfUnitsOutstanding>
        <approxSaleDate>05/20/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/01/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>9647</amountOfSecuritiesAcquired>
        <paymentDate>03/01/2019</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/10/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6270</amountOfSecuritiesAcquired>
        <paymentDate>02/10/2020</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/11/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2272</amountOfSecuritiesAcquired>
        <paymentDate>02/11/2020</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/12/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1929</amountOfSecuritiesAcquired>
        <paymentDate>02/12/2020</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/13/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>11120</amountOfSecuritiesAcquired>
        <paymentDate>02/13/2020</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/08/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2680</amountOfSecuritiesAcquired>
        <paymentDate>02/08/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/10/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1082</amountOfSecuritiesAcquired>
        <paymentDate>02/10/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Grant R. Bates</name>
          <address>
            <com:street1>1301 McKinney Street</com:street1>
            <com:street2>Suite 2300</com:street2>
            <com:city>Houston</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>77010</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>05/17/2024</saleDate>
        <amountOfSecuritiesSold>4698</amountOfSecuritiesSold>
        <grossProceeds>64649.06</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/20/2024</noticeDate>
        <signature>/s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Grant R. Bates</signature>
      </noticeSignature>
    </formData>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 6755}]
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
  35000
  474977.13
  85076144
  05/20/2024
  NYSE
  Common
  03/01/2019
  Restricted Stock Vesting
  Issuer
  N
  9647
  03/01/2019
  Compensation
  Common
  02/10/2020
  Restricted Stock Vesting
  Issuer
  N
  6270
  02/10/2020
  Compensation
  Common
  02/11/2020
  Restricted Stock Vesting
  Issuer
  N
  2272
  02/11/2020
  Compensation
  Common
  02/12/2020
  Restricted Stock Vesting
  Issuer
  N
  1929
  02/12/2020
  Compensation
  Common
  02/13/2020
  Restricted Stock Vesting
  Issuer
  N
  11120
  02/13/2020
  Compensation
  Common
  02/08/2021
  Restricted Stock Vesting
  Issuer
  N
  2680
  02/08/2021
  Compensation
  Common
  02/10/2021
  Restricted Stock Vesting
  Issuer
  N
  1082
  02/10/2021
  Compensation
  N
  Grant R. Bates
  1301 McKinney Street
  Suite 2300
  Houston
  TX
  77010
  Common
  05/17/2024
  4698
  64649.06
  05/20/2024
  /s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Grant R. Bates