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        <filer>
          <filerCredentials>
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            <ccc>XXXXXXXX</ccc>
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        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <issuerCik>0001673985</issuerCik>
        <issuerName>AdvanSix Inc.</issuerName>
        <secFileNumber>001-37774</secFileNumber>
        <issuerAddress>
          <com:street1>300 KIMBALL DRIVE</com:street1>
          <com:street2>SUITE 101</com:street2>
          <com:city>PARSIPPANY</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07054</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(973) 526-1800</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kane Erin N</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>225 Liberty Street</com:street1>
            <com:street2>Floor 37</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10281</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>5000</noOfUnitsSold>
        <aggregateMarketValue>150964.07</aggregateMarketValue>
        <noOfUnitsOutstanding>26731009</noOfUnitsOutstanding>
        <approxSaleDate>02/03/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/28/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of performance share unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>AdvanSix Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5000</amountOfSecuritiesAcquired>
        <paymentDate>02/28/2023</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
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          <name>Erin Kane</name>
          <address>
            <com:street1>300 KIMBALL DRIVE</com:street1>
            <com:street2>SUITE 101</com:street2>
            <com:city>PARSIPPANY</com:city>
            <com:stateOrCountry>NJ</com:stateOrCountry>
            <com:zipCode>07054</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>12/02/2024</saleDate>
        <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
        <grossProceeds>161452.94</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Erin Kane</name>
          <address>
            <com:street1>300 KIMBALL DRIVE</com:street1>
            <com:street2>SUITE 101</com:street2>
            <com:city>PARSIPPANY</com:city>
            <com:stateOrCountry>NJ</com:stateOrCountry>
            <com:zipCode>07054</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>01/02/2025</saleDate>
        <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
        <grossProceeds>140756.93</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>02/03/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>12/08/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>Erin Kane</signature>
      </noticeSignature>
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text: 144
  0001684077
  XXXXXXXX
  LIVE
  0001673985
  AdvanSix Inc.
  001-37774
  300 KIMBALL DRIVE
  SUITE 101
  PARSIPPANY
  NJ
  07054
  (973) 526-1800
  Kane Erin N
  Officer
  Common Stock
  Merrill Lynch
  225 Liberty Street
  Floor 37
  New York
  NY
  10281
  5000
  150964.07
  26731009
  02/03/2025
  NYSE
  Common Stock
  02/28/2023
  Vesting of performance share unit award
  AdvanSix Inc.
  N
  5000
  02/28/2023
  Granted as part of issuer equity compensation plan
  N
  Erin Kane
  300 KIMBALL DRIVE
  SUITE 101
  PARSIPPANY
  NJ
  07054
  Common Stock
  12/02/2024
  5000
  161452.94
  Erin Kane
  300 KIMBALL DRIVE
  SUITE 101
  PARSIPPANY
  NJ
  07054
  Common Stock
  01/02/2025
  5000
  140756.93
  02/03/2025
  12/08/2023
  Erin Kane