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        <filerCredentials>
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          <ccc>XXXXXXXX</ccc>
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      <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>4089431234</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SANGIOVANNI VINCENTELLI ALBERTO</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co., Inc.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>4000</noOfUnitsSold>
      <aggregateMarketValue>964200.00</aggregateMarketValue>
      <noOfUnitsOutstanding>271790000</noOfUnitsOutstanding>
      <approxSaleDate>09/08/2023</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/04/2015</acquiredDate>
      <natureOfAcquisitionTransaction>RSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>4000</amountOfSecuritiesAcquired>
      <paymentDate>02/04/2015</paymentDate>
      <natureOfPayment>Employee Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Alberto Sangiovanni-Vincentelli</name>
        <address>
          <com:street1>C/O Cadence Design Systems, Inc.</com:street1>
          <com:street2>2655 Seely Ave Bldg 5</com:street2>
          <com:city>San Jose</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95134</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>08/08/2023</saleDate>
      <amountOfSecuritiesSold>8800</amountOfSecuritiesSold>
      <grossProceeds>2026020.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Name of Person for Whose Account the Securities are to be Sold: Alberto Sangiovanni-Vincentelli TTEE, Alberto Sangiovanni-Vincentelli 3/22/21 Trust</remarks>
    <noticeSignature>
      <noticeDate>09/08/2023</noticeDate>
      <signature>Alberto Sangiovanni-Vincentelli TTEE</signature>
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144
0001181490
XXXXXXXX
LIVE
0000813672
CADENCE DESIGN SYSTEMS INC
000-15867
2655 SEELY AVENUE BLDG 5
SAN JOSE
CA
95134
4089431234
SANGIOVANNI VINCENTELLI ALBERTO
Director
Common
Charles Schwab & Co., Inc.
3000 Schwab Way
Westlake
TX
76262
4000
964200.00
271790000
09/08/2023
Nasdaq
Common
02/04/2015
RSU
Issuer
N
4000
02/04/2015
Employee Compensation
N
Alberto Sangiovanni-Vincentelli
C/O Cadence Design Systems, Inc.
2655 Seely Ave Bldg 5
San Jose
CA
95134
Common
08/08/2023
8800
2026020.00
Name of Person for Whose Account the Securities are to be Sold: Alberto Sangiovanni-Vincentelli TTEE, Alberto Sangiovanni-Vincentelli 3/22/21 Trust
09/08/2023
Alberto Sangiovanni-Vincentelli TTEE