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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001752661</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001977303</issuerCik>
        <issuerName>Arcadium Lithium plc</issuerName>
        <secFileNumber>001-41907</secFileNumber>
        <issuerAddress>
          <com:street1>SUITE 12, GATEWAY HUB</com:street1>
          <com:street2>SHANNON AIRPORT HOUSE</com:street2>
          <com:city>SHANNON, CO. CLARE V14 E3 70</com:city>
          <com:stateOrCountry>L2</com:stateOrCountry>
          <com:zipCode>00000</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>353 1 6875238</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Antoniazzi Gilberto</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>166038</noOfUnitsSold>
        <aggregateMarketValue>870869.32</aggregateMarketValue>
        <noOfUnitsOutstanding>1075630109</noOfUnitsOutstanding>
        <approxSaleDate>11/14/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/02/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Merger</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>673</amountOfSecuritiesAcquired>
        <paymentDate>03/02/2018</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/20/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>4497</amountOfSecuritiesAcquired>
        <paymentDate>02/20/2019</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/27/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7612</amountOfSecuritiesAcquired>
        <paymentDate>02/27/2020</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/16/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5926</amountOfSecuritiesAcquired>
        <paymentDate>01/16/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/15/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5007</amountOfSecuritiesAcquired>
        <paymentDate>02/15/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/02/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>11522</amountOfSecuritiesAcquired>
        <paymentDate>10/02/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>11/02/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Retirement Plan Distribution</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>11775</amountOfSecuritiesAcquired>
        <paymentDate>11/02/2021</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>09/19/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>8991</amountOfSecuritiesAcquired>
        <paymentDate>09/19/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/10/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>22287</amountOfSecuritiesAcquired>
        <paymentDate>10/10/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>12/22/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>18271</amountOfSecuritiesAcquired>
        <paymentDate>12/22/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/04/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>40089</amountOfSecuritiesAcquired>
        <paymentDate>01/04/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/22/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1142</amountOfSecuritiesAcquired>
        <paymentDate>02/22/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>11/14/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Option Granted - 02/27/2015</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>28246</amountOfSecuritiesAcquired>
        <paymentDate>11/14/2024</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/14/2024</noticeDate>
        <signature>/s/ Ryan Riviere, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Gilberto Antoniazzi</signature>
      </noticeSignature>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 9326}]
text: 144
  0001752661
  XXXXXXXX
  LIVE
  0001977303
  Arcadium Lithium plc
  001-41907
  SUITE 12, GATEWAY HUB
  SHANNON AIRPORT HOUSE
  SHANNON, CO. CLARE V14 E3 70
  L2
  00000
  353 1 6875238
  Antoniazzi Gilberto
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  166038
  870869.32
  1075630109
  11/14/2024
  NYSE
  Common
  03/02/2018
  Merger
  Issuer
  N
  673
  03/02/2018
  Cash
  Common
  02/20/2019
  Stock Option Exercise
  Issuer
  N
  4497
  02/20/2019
  Cash
  Common
  02/27/2020
  Restricted Stock Vesting
  Issuer
  N
  7612
  02/27/2020
  Compensation
  Common
  01/16/2021
  Restricted Stock Vesting
  Issuer
  N
  5926
  01/16/2021
  Compensation
  Common
  02/15/2021
  Restricted Stock Vesting
  Issuer
  N
  5007
  02/15/2021
  Compensation
  Common
  10/02/2021
  Restricted Stock Vesting
  Issuer
  N
  11522
  10/02/2021
  Compensation
  Common
  11/02/2021
  Retirement Plan Distribution
  Issuer
  N
  11775
  11/02/2021
  Cash
  Common
  09/19/2022
  Stock Option Exercise
  Issuer
  N
  8991
  09/19/2022
  Cash
  Common
  10/10/2022
  Restricted Stock Vesting
  issuer
  N
  22287
  10/10/2022
  Compensation
  Common
  12/22/2023
  Restricted Stock Vesting
  Issuer
  N
  18271
  12/22/2023
  Compensation
  Common
  01/04/2024
  Restricted Stock Vesting
  Issuer
  N
  40089
  01/04/2024
  Compensation
  Common
  02/22/2024
  Restricted Stock Vesting
  Issuer
  N
  1142
  02/22/2024
  Compensation
  Common
  11/14/2024
  Option Granted - 02/27/2015
  Issuer
  N
  28246
  11/14/2024
  Cash
  Y
  11/14/2024
  /s/ Ryan Riviere, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Gilberto Antoniazzi