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>0001216858</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  </filerInfo>
  </headerData>
  <formData>
  <issuerInfo>
  <issuerCik>0001336920</issuerCik>
  <issuerName>Leidos Holdings</issuerName>
  <secFileNumber>001-33072</secFileNumber>
  <issuerAddress>
  <street1 xmlns="http://www.sec.gov/edgar/common">1750 Presidents Street</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Reston</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">VA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common"> 20190</zipCode>
  </issuerAddress>
  <issuerContactPhone>571-526-6000</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Noel B. Geer</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Director</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>Robert W. Baird &amp; Co.</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">1600 West End Avenue</street1>
  <street2 xmlns="http://www.sec.gov/edgar/common">Ste. 1100</street2>
  <city xmlns="http://www.sec.gov/edgar/common">Nashville</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">TN</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">37203</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>2106</noOfUnitsSold>
  <aggregateMarketValue>217401.27</aggregateMarketValue>
  <noOfUnitsOutstanding>137506428</noOfUnitsOutstanding>
  <approxSaleDate>11/06/2023</approxSaleDate>
  <securitiesExchangeName>NYSE</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common stock</securitiesClassTitle>
  <acquiredDate>04/30/2021</acquiredDate>
  <natureOfAcquisitionTransaction>Acquired as compensation - restricted stock units</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Leidos Holdings, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1047</amountOfSecuritiesAcquired>
  <paymentDate>04/30/2021</paymentDate>
  <natureOfPayment>Compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common stock</securitiesClassTitle>
  <acquiredDate>04/29/2022</acquiredDate>
  <natureOfAcquisitionTransaction>Acquired as compensation - restricted stock units</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Leidos Holdings, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1059</amountOfSecuritiesAcquired>
  <paymentDate>04/29/2022</paymentDate>
  <natureOfPayment>Compensation</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <remarks>Trades executed under the Noel B. Geer Living Trust.</remarks>
  <noticeSignature>
  <noticeDate>11/06/2023</noticeDate>
  <signature>/s/ Noel B. Geer</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3364}]
text: 144
  0001216858
  XXXXXXXX
  LIVE
  0001336920
  Leidos Holdings
  001-33072
  1750 Presidents Street
  Reston
  VA
  20190
  571-526-6000
  Noel B. Geer
  Director
  Common Stock
  Robert W. Baird & Co.
  1600 West End Avenue
  Ste. 1100
  Nashville
  TN
  37203
  2106
  217401.27
  137506428
  11/06/2023
  NYSE
  Common stock
  04/30/2021
  Acquired as compensation - restricted stock units
  Leidos Holdings, Inc.
  N
  1047
  04/30/2021
  Compensation
  Common stock
  04/29/2022
  Acquired as compensation - restricted stock units
  Leidos Holdings, Inc.
  N
  1059
  04/29/2022
  Compensation
  Y
  Trades executed under the Noel B. Geer Living Trust.
  11/06/2023
  /s/ Noel B. Geer