content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0002034604</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>Fochtman Barbara A</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>61372</noOfUnitsSold>
        <aggregateMarketValue>322951.90</aggregateMarketValue>
        <noOfUnitsOutstanding>1075630109</noOfUnitsOutstanding>
        <approxSaleDate>11/13/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/27/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>785</amountOfSecuritiesAcquired>
        <paymentDate>02/27/2018</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/11/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Merger</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2406</amountOfSecuritiesAcquired>
        <paymentDate>10/11/2018</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/13/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1347</amountOfSecuritiesAcquired>
        <paymentDate>02/13/2019</paymentDate>
        <natureOfPayment>Compensation</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>12/22/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>12196</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>25373</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>709</amountOfSecuritiesAcquired>
        <paymentDate>02/22/2024</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>1320</amountOfSecuritiesAcquired>
        <paymentDate>02/15/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>12/20/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Merger</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2406</amountOfSecuritiesAcquired>
        <paymentDate>12/20/2018</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>05/13/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Merger</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2406</amountOfSecuritiesAcquired>
        <paymentDate>05/13/2019</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/11/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Merger</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>4812</amountOfSecuritiesAcquired>
        <paymentDate>03/11/2020</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>9,624 shares from today's sale took place in the account of Curtis D. Fochtman, spouse of Barbara Fochtman.</remarks>
      <noticeSignature>
        <noticeDate>11/13/2024</noticeDate>
        <signature>/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Barbara A. Fochtman</signature>
      </noticeSignature>
    </formData>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 8324}]
text: 144
  0002034604
  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
  Fochtman Barbara A
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  61372
  322951.90
  1075630109
  11/13/2024
  NYSE
  Common
  02/27/2018
  Restricted Stock Vesting
  Issuer
  N
  785
  02/27/2018
  Compensation
  Common
  10/11/2018
  Merger
  Issuer
  N
  2406
  10/11/2018
  Cash
  Common
  02/13/2019
  Restricted Stock Vesting
  Issuer
  N
  1347
  02/13/2019
  Compensation
  Common
  02/27/2020
  Restricted Stock Vesting
  Issuer
  N
  7612
  02/27/2020
  Compensation
  Common
  12/22/2023
  Restricted Stock Vesting
  Issuer
  N
  12196
  12/22/2023
  Compensation
  Common
  01/04/2024
  Restricted Stock Vesting
  Issuer
  N
  25373
  01/04/2024
  Compensation
  Common
  02/22/2024
  Restricted Stock Vesting
  Issuer
  N
  709
  02/22/2024
  Compensation
  Common
  02/15/2021
  Restricted Stock Vesting
  Issuer
  N
  1320
  02/15/2021
  Compensation
  Common
  12/20/2018
  Merger
  Issuer
  N
  2406
  12/20/2018
  Cash
  Common
  05/13/2019
  Merger
  Issuer
  N
  2406
  05/13/2019
  Cash
  Common
  03/11/2020
  Merger
  Issuer
  N
  4812
  03/11/2020
  Cash
  Y
  9,624 shares from today's sale took place in the account of Curtis D. Fochtman, spouse of Barbara Fochtman.
  11/13/2024
  /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Barbara A. Fochtman