content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001723920</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001795250</issuerCik>
        <issuerName>Sphere Entertainment Co.</issuerName>
        <secFileNumber>001-39245</secFileNumber>
        <issuerAddress>
          <com:street1>Two Penn Plaza</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10121</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>725-258-0001</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>The Charles F. Dolan 2009 Revocable Trust</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Other</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue, 6th Floor</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>55385</noOfUnitsSold>
        <aggregateMarketValue>1929060</aggregateMarketValue>
        <noOfUnitsOutstanding>28960194</noOfUnitsOutstanding>
        <approxSaleDate>03/10/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
        <acquiredDate>03/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>See Remarks (1)</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>See Remarks (1)</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>55385</amountOfSecuritiesAcquired>
        <paymentDate>03/15/2024</paymentDate>
        <natureOfPayment>See Remarks (1)</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>(1) The securities to be sold were acquired on various dates between April 17, 2020 and March 15, 2024 through various methods, including in connection with a distribution of securities following the spin-off of the Issuer, as consideration in a merger transaction, and as a result of contributions by Charles F. Dolan, the settlor of the Charles F. Dolan 2009 Revocable Trust.</remarks>
      <noticeSignature>
        <noticeDate>03/10/2025</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for The Charles F. Dolan 2009 Revocable Trust</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3301}]
text: 144
  0001723920
  XXXXXXXX
  LIVE
  0001795250
  Sphere Entertainment Co.
  001-39245
  Two Penn Plaza
  New York
  NY
  10121
  725-258-0001
  The Charles F. Dolan 2009 Revocable Trust
  Other
  Class A Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue, 6th Floor
  New York
  NY
  10017
  55385
  1929060
  28960194
  03/10/2025
  NYSE
  Class A Common Stock
  03/15/2024
  See Remarks (1)
  See Remarks (1)
  N
  55385
  03/15/2024
  See Remarks (1)
  Y
  (1) The securities to be sold were acquired on various dates between April 17, 2020 and March 15, 2024 through various methods, including in connection with a distribution of securities following the spin-off of the Issuer, as consideration in a merger transaction, and as a result of contributions by Charles F. Dolan, the settlor of the Charles F. Dolan 2009 Revocable Trust.
  03/10/2025
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for The Charles F. Dolan 2009 Revocable Trust