content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001866541</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001856525</issuerCik>
        <issuerName>Core &amp; Main, Inc.</issuerName>
        <secFileNumber>001-40650</secFileNumber>
        <issuerAddress>
          <com:street1>1830 Craig Park Court</com:street1>
          <com:city>St. Louis</com:city>
          <com:stateOrCountry>MO</com:stateOrCountry>
          <com:zipCode>63146</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>314-432-4700</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>James G. Castellano</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>43994</noOfUnitsSold>
        <aggregateMarketValue>2721028.9</aggregateMarketValue>
        <noOfUnitsOutstanding>189654473</noOfUnitsOutstanding>
        <approxSaleDate>07/18/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common stock</securitiesClassTitle>
        <acquiredDate>04/17/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer from James G. Castellano, who acquired the shares as Annual Director Equity Award through Core &amp; Main Inc on 06/28/23</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>James G. Castellano</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5393</amountOfSecuritiesAcquired>
        <paymentDate>04/17/2025</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common stock</securitiesClassTitle>
        <acquiredDate>04/17/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer from James G. Castellano, who acquired the shares as Annual Director Equity Award through Core &amp; Main Inc on 06/26/24</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>James G. Castellano</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3927</amountOfSecuritiesAcquired>
        <paymentDate>04/17/2025</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Class B Common Stock: Partnership Interests (C&amp;M Holdings, LP)</securitiesClassTitle>
        <acquiredDate>10/29/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer from James G. Castellano, who acquired the shares from an Investment through Core &amp; Main Management Feeder LLC on 01/01/18</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>James G. Castellano</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>34674</amountOfSecuritiesAcquired>
        <paymentDate>10/29/2018</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>Class B Common Stock to be exchanged for Class A Common Stock.  The shares filed today will be sold by the James G. Castellano Revocable Trust, James G. Castellano as Trustee.</remarks>
      <noticeSignature>
        <noticeDate>07/18/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>04/18/2025</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for James G. Castellano</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4712}]
text: 144
  0001866541
  XXXXXXXX
  LIVE
  0001856525
  Core & Main, Inc.
  001-40650
  1830 Craig Park Court
  St. Louis
  MO
  63146
  314-432-4700
  James G. Castellano
  Director
  Class A Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  43994
  2721028.9
  189654473
  07/18/2025
  NYSE
  Class A Common stock
  04/17/2025
  Transfer from James G. Castellano, who acquired the shares as Annual Director Equity Award through Core & Main Inc on 06/28/23
  James G. Castellano
  N
  5393
  04/17/2025
  Compensation
  Class A Common stock
  04/17/2025
  Transfer from James G. Castellano, who acquired the shares as Annual Director Equity Award through Core & Main Inc on 06/26/24
  James G. Castellano
  N
  3927
  04/17/2025
  Compensation
  Class B Common Stock: Partnership Interests (C&M Holdings, LP)
  10/29/2018
  Transfer from James G. Castellano, who acquired the shares from an Investment through Core & Main Management Feeder LLC on 01/01/18
  James G. Castellano
  N
  34674
  10/29/2018
  Cash
  Y
  Class B Common Stock to be exchanged for Class A Common Stock.  The shares filed today will be sold by the James G. Castellano Revocable Trust, James G. Castellano as Trustee.
  07/18/2025
  04/18/2025
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for James G. Castellano