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>0001964545</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001897982</issuerCik>
        <issuerName>Aspen Technology, Inc.</issuerName>
        <secFileNumber>001-41400</secFileNumber>
        <issuerAddress>
          <com:street1>20 CROSBY DRIVE</com:street1>
          <com:city>BEDFORD</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01730</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>781-221-1939</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Mouritsen Mark Edgar</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Former 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>300</noOfUnitsSold>
        <aggregateMarketValue>67146.00</aggregateMarketValue>
        <noOfUnitsOutstanding>63254548</noOfUnitsOutstanding>
        <approxSaleDate>09/04/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/06/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>300</amountOfSecuritiesAcquired>
        <paymentDate>02/06/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Mark E. Mouritsen</name>
          <address>
            <com:street1>20 Crosby Drive</com:street1>
            <com:city>Bedford</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01730</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>08/21/2024</saleDate>
        <amountOfSecuritiesSold>2890</amountOfSecuritiesSold>
        <grossProceeds>631862.28</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Mark E. Mouritsen</name>
          <address>
            <com:street1>20 Crosby Drive</com:street1>
            <com:city>Bedford</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01730</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/03/2024</saleDate>
        <amountOfSecuritiesSold>1100</amountOfSecuritiesSold>
        <grossProceeds>254098.93</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>09/04/2024</noticeDate>
        <signature>/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark E. Mouritsen</signature>
      </noticeSignature>
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text: 144
  0001964545
  XXXXXXXX
  LIVE
  0001897982
  Aspen Technology, Inc.
  001-41400
  20 CROSBY DRIVE
  BEDFORD
  MA
  01730
  781-221-1939
  Mouritsen Mark Edgar
  Former Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  300
  67146.00
  63254548
  09/04/2024
  NASDAQ
  Common
  02/06/2023
  Restricted Stock Vesting
  Issuer
  N
  300
  02/06/2023
  Compensation
  N
  Mark E. Mouritsen
  20 Crosby Drive
  Bedford
  MA
  01730
  Common
  08/21/2024
  2890
  631862.28
  Mark E. Mouritsen
  20 Crosby Drive
  Bedford
  MA
  01730
  Common
  09/03/2024
  1100
  254098.93
  09/04/2024
  /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark E. Mouritsen