content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001494211</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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      <issuerInfo>
        <issuerCik>0000813672</issuerCik>
        <issuerName>CADENCE DESIGN SYSTEMS INC</issuerName>
        <secFileNumber>000-15867</secFileNumber>
        <issuerAddress>
          <com:street1>2655 SEELY AVENUE BLDG 5</com:street1>
          <com:city>SAN JOSE</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95134</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>408-943-12134</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Ita Brennan</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Board Member</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>360</noOfUnitsSold>
        <aggregateMarketValue>97560</aggregateMarketValue>
        <noOfUnitsOutstanding>274180000</noOfUnitsOutstanding>
        <approxSaleDate>04/24/2025</approxSaleDate>
        <securitiesExchangeName>Nasdaq</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>05/04/2023</acquiredDate>
        <natureOfAcquisitionTransaction>RSU Vest</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>360</amountOfSecuritiesAcquired>
        <paymentDate>05/04/2023</paymentDate>
        <natureOfPayment>NA</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>04/24/2025</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ita Brennan.</signature>
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text: 144
  0001494211
  XXXXXXXX
  LIVE
  0000813672
  CADENCE DESIGN SYSTEMS INC
  000-15867
  2655 SEELY AVENUE BLDG 5
  SAN JOSE
  CA
  95134
  408-943-12134
  Ita Brennan
  Board Member
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  360
  97560
  274180000
  04/24/2025
  Nasdaq
  Common
  05/04/2023
  RSU Vest
  Issuer
  N
  360
  05/04/2023
  NA
  Y
  04/24/2025
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ita Brennan.