<?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>0001341985</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000089439</issuerCik>
      <issuerName>Mueller Industries Inc</issuerName>
      <secFileNumber>001-06770</secFileNumber>
      <issuerAddress>
        <com:street1>150 SCHILLING BLVD #100</com:street1>
        <com:city>COLLIERVILLE</com:city>
        <com:stateOrCountry>TN</com:stateOrCountry>
        <com:zipCode>38017</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9017533200</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>GREGORY CHRISTOPHER</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>CEO</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>MERRILL LYNCH</name>
        <address>
          <com:street1>6060 POPLAR AVENUE #300</com:street1>
          <com:city>MEMPHIS</com:city>
          <com:stateOrCountry>TN</com:stateOrCountry>
          <com:zipCode>38119</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>50000</noOfUnitsSold>
      <aggregateMarketValue>5150000</aggregateMarketValue>
      <noOfUnitsOutstanding>111013631</noOfUnitsOutstanding>
      <approxSaleDate>10/27/2025</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>08/01/2023</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK VESTED</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>MUELLER INDUSTRIES</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>50000</amountOfSecuritiesAcquired>
      <paymentDate>08/01/2023</paymentDate>
      <natureOfPayment>ALL SHS FUNGIBLE, PART OF COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>GREGORY CHRISTOPHER</name>
        <address>
          <com:street1>2530 JOHNSON ROAD</com:street1>
          <com:city>GERMANTOWN</com:city>
          <com:stateOrCountry>TN</com:stateOrCountry>
          <com:zipCode>38139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>10/23/2025</saleDate>
      <amountOfSecuritiesSold>158000</amountOfSecuritiesSold>
      <grossProceeds>16467359.61</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>GREGORY CHRISTOPHER 2024 TRUST</name>
        <address>
          <com:street1>2530 JOHNSON ROAD</com:street1>
          <com:city>GERMANTOWN</com:city>
          <com:stateOrCountry>TN</com:stateOrCountry>
          <com:zipCode>38139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>10/24/2025</saleDate>
      <amountOfSecuritiesSold>70000</amountOfSecuritiesSold>
      <grossProceeds>7245288.96</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>ANGELA K CHRISTOPHER 2012 TRUST</name>
        <address>
          <com:street1>2530 JOHNSON ROAD</com:street1>
          <com:city>GERMANTOWN</com:city>
          <com:stateOrCountry>TN</com:stateOrCountry>
          <com:zipCode>38139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>10/24/2025</saleDate>
      <amountOfSecuritiesSold>72000</amountOfSecuritiesSold>
      <grossProceeds>7465598.14</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>10/27/2025</noticeDate>
      <signature>GREGORY L CHRISTOPHER</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
