content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
  <submissionType>144</submissionType>
  <filerInfo>
  <filer>
  <filerCredentials>
  <cik>0001332784</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  </filerInfo>
  </headerData>
  <formData>
  <issuerInfo>
  <issuerCik>0001567892</issuerCik>
  <issuerName>Mallinckrodt plc</issuerName>
  <secFileNumber>001-35803</secFileNumber>
  <issuerAddress>
  <street1 xmlns="http://www.sec.gov/edgar/common">College Business and Technology Park</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Cruiserath, Blanchardstown</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">L2</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">DUBLIN 15</zipCode>
  </issuerAddress>
  <issuerContactPhone>353-1 6960000</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Silver Point Capital L.P.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Director</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>Common Stock(1)</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>Jefferies LLC</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">520 Madison Avenue</street1>
  <city xmlns="http://www.sec.gov/edgar/common">New York</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">NY</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">10022</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>130000</noOfUnitsSold>
  <aggregateMarketValue>5005000</aggregateMarketValue>
  <noOfUnitsOutstanding>19696335</noOfUnitsOutstanding>
  <approxSaleDate>11/15/2023</approxSaleDate>
  <securitiesExchangeName>NYSE</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock(1)</securitiesClassTitle>
  <acquiredDate>11/14/2023</acquiredDate>
  <natureOfAcquisitionTransaction>Acquired in connection with the Issuer's emergence from bankruptcy on November 14, 2023</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1215673</amountOfSecuritiesAcquired>
  <paymentDate>11/14/2023</paymentDate>
  <natureOfPayment>Satisfaction of bankrupty claims</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <remarks>(1) The total number of shares of Common Stock to be sold includes: Silver Point Capital Fund, L.P. - 31,519 shares; Silver Point Capital Offshore Master Fund, L.P. - 69,858 shares; Silver Point Distressed Opportunity Institutional Partners, L.P. - 20,793 shares; and Silver Point Distressed Opportunity Institutional Partners Master Fund (Offshore), L.P. - 7,830 shares.
  (2) The number of shares of Common Stock to be sold represents shares of Common Stock that may be sold on an aggregate basis by Silver Point Capital Fund, L.P., Silver Point Capital Offshore Master Fund, L.P., Silver Point Distressed Opportunity Institutional Partners, L.P., Silver Point Distressed Opportunity Institutional Partners Master Fund (Offshore), L.P., Silver Point Distressed Opportunities Fund, L.P., Silver Point Distressed Opportunities Offshore Master Fund, L.P., Silver Point Distressed Opportunity Institutional Partners II, L.P. and Silver Point Distressed Opportunity Institutional Partners II (Offshore).</remarks>
  <noticeSignature>
  <noticeDate>11/28/2023</noticeDate>
  <signature>Steven Weiser, Authorized Signatory</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3820}]
text: 144
  0001332784
  XXXXXXXX
  LIVE
  0001567892
  Mallinckrodt plc
  001-35803
  College Business and Technology Park
  Cruiserath, Blanchardstown
  L2
  DUBLIN 15
  353-1 6960000
  Silver Point Capital L.P.
  Director
  Common Stock(1)
  Jefferies LLC
  520 Madison Avenue
  New York
  NY
  10022
  130000
  5005000
  19696335
  11/15/2023
  NYSE
  Common Stock(1)
  11/14/2023
  Acquired in connection with the Issuer's emergence from bankruptcy on November 14, 2023
  Issuer
  N
  1215673
  11/14/2023
  Satisfaction of bankrupty claims
  Y
  (1) The total number of shares of Common Stock to be sold includes: Silver Point Capital Fund, L.P. - 31,519 shares; Silver Point Capital Offshore Master Fund, L.P. - 69,858 shares; Silver Point Distressed Opportunity Institutional Partners, L.P. - 20,793 shares; and Silver Point Distressed Opportunity Institutional Partners Master Fund (Offshore), L.P. - 7,830 shares.
  (2) The number of shares of Common Stock to be sold represents shares of Common Stock that may be sold on an aggregate basis by Silver Point Capital Fund, L.P., Silver Point Capital Offshore Master Fund, L.P., Silver Point Distressed Opportunity Institutional Partners, L.P., Silver Point Distressed Opportunity Institutional Partners Master Fund (Offshore), L.P., Silver Point Distressed Opportunities Fund, L.P., Silver Point Distressed Opportunities Offshore Master Fund, L.P., Silver Point Distressed Opportunity Institutional Partners II, L.P. and Silver Point Distressed Opportunity Institutional Partners II (Offshore).
  11/28/2023
  Steven Weiser, Authorized Signatory