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 J. Lansing</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>President,  CEO,  and Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>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>24042</noOfUnitsSold>
        <aggregateMarketValue>51209460</aggregateMarketValue>
        <noOfUnitsOutstanding>24341690</noOfUnitsOutstanding>
        <approxSaleDate>05/13/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/13/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>24042</amountOfSecuritiesAcquired>
        <paymentDate>05/13/2025</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>William J. Lansing</name>
          <address>
            <com:street1>C/o Fair Isaac Corporation</com:street1>
            <com:street2>5 West Mendenhall, Suite 105</com:street2>
            <com:city>Bozeman</com:city>
            <com:stateOrCountry>MT</com:stateOrCountry>
            <com:zipCode>59715</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>03/11/2025</saleDate>
        <amountOfSecuritiesSold>6011</amountOfSecuritiesSold>
        <grossProceeds>10321214</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>William J. Lansing</name>
          <address>
            <com:street1>C/o Fair Isaac Corporation</com:street1>
            <com:street2>5 West Mendenhall, Suite 105</com:street2>
            <com:city>Bozeman</com:city>
            <com:stateOrCountry>MT</com:stateOrCountry>
            <com:zipCode>59715</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>04/08/2025</saleDate>
        <amountOfSecuritiesSold>6010</amountOfSecuritiesSold>
        <grossProceeds>10346853</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>The shares covered by this filing are stock options that will be exercised today or within three  months from the date of this filing.</remarks>
      <noticeSignature>
        <noticeDate>05/13/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>11/11/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for William J.  Lansing</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4461}]
text: 144
  0001074500
  XXXXXXXX
  LIVE
  0000814547
  Fair Isaac Corporation
  001-11689
  5 West Mendenhall,  Suite 105
  Bozeman
  MT
  59715
  406-982-7276
  William J. Lansing
  President,  CEO,  and Director
  Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue - 6th Floor
  New York
  NY
  10017
  24042
  51209460
  24341690
  05/13/2025
  NYSE
  Common Stock
  05/13/2025
  Stock Option Exercise
  Issuer
  N
  24042
  05/13/2025
  Cash
  N
  William J. Lansing
  C/o Fair Isaac Corporation
  5 West Mendenhall, Suite 105
  Bozeman
  MT
  59715
  Common Stock
  03/11/2025
  6011
  10321214
  William J. Lansing
  C/o Fair Isaac Corporation
  5 West Mendenhall, Suite 105
  Bozeman
  MT
  59715
  Common Stock
  04/08/2025
  6010
  10346853
  The shares covered by this filing are stock options that will be exercised today or within three  months from the date of this filing.
  05/13/2025
  11/11/2024
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for William J.  Lansing