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            <ccc>XXXXXXXX</ccc>
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        <issuerCik>0000916076</issuerCik>
        <issuerName>MARTIN MARIETTA MATERIALS INC</issuerName>
        <secFileNumber>001-12744</secFileNumber>
        <issuerAddress>
          <com:street1>4123 PARKLAKE AVE</com:street1>
          <com:city>RALEIGH</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27612</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>919-781-4550</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>McCunniff Donald A.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Martin Marietta Materials, Inc.</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Investments</name>
          <address>
            <com:street1>100 Summer Street</com:street1>
            <com:city>Boston</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>02210</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>1332</noOfUnitsSold>
        <aggregateMarketValue>653066.28</aggregateMarketValue>
        <noOfUnitsOutstanding>60974146</noOfUnitsOutstanding>
        <approxSaleDate>02/26/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/12/2015</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1332</amountOfSecuritiesAcquired>
        <paymentDate>05/12/2015</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>02/26/2025</noticeDate>
        <signature>Bradley D. Kohn, Attorney-in-Fact</signature>
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text: 144
  0001355849
  XXXXXXXX
  LIVE
  0000916076
  MARTIN MARIETTA MATERIALS INC
  001-12744
  4123 PARKLAKE AVE
  RALEIGH
  NC
  27612
  919-781-4550
  McCunniff Donald A.
  Officer
  Martin Marietta Materials, Inc.
  Fidelity Investments
  100 Summer Street
  Boston
  MA
  02210
  1332
  653066.28
  60974146
  02/26/2025
  NYSE
  Common Stock
  05/12/2015
  Stock Option Exercise
  Martin Marietta Materials, Inc.
  N
  1332
  05/12/2015
  Cash
  Y
  02/26/2025
  Bradley D. Kohn, Attorney-in-Fact