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>0001074500</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000814547</issuerCik>
        <issuerName>Fair Isaac Corporation</issuerName>
        <secFileNumber>001-11689</secFileNumber>
        <issuerAddress>
          <com:street1>5 West Mendenhall, Suite 105</com:street1>
          <com:city>Bozeman</com:city>
          <com:stateOrCountry>MT</com:stateOrCountry>
          <com:zipCode>59715</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>406-982-7276</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>William Lansing</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Affiliate</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</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>24000</noOfUnitsSold>
        <aggregateMarketValue>31101120</aggregateMarketValue>
        <noOfUnitsOutstanding>24852057</noOfUnitsOutstanding>
        <approxSaleDate>02/20/2024</approxSaleDate>
        <securitiesExchangeName>nyse</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>12/09/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vested shares from RSU, MSU and PSU</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>William Lansing</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>24000</amountOfSecuritiesAcquired>
        <paymentDate>12/09/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>The shares represented on this filing were acquired during 12/09/23 - 12/10/23.</remarks>
      <noticeSignature>
        <noticeDate>02/20/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>11/13/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for William Lansing</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3066}]
text: 144
  0001074500
  XXXXXXXX
  LIVE
  0000814547
  Fair Isaac Corporation
  001-11689
  5 West Mendenhall, Suite 105
  Bozeman
  MT
  59715
  406-982-7276
  William Lansing
  Affiliate
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue - 6th Floor
  New York
  NY
  10017
  24000
  31101120
  24852057
  02/20/2024
  nyse
  Common
  12/09/2023
  Vested shares from RSU, MSU and PSU
  William Lansing
  N
  24000
  12/09/2023
  Compensation
  Y
  The shares represented on this filing were acquired during 12/09/23 - 12/10/23.
  02/20/2024
  11/13/2023
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for William Lansing