<SEC-DOCUMENT>0001973141-25-000142.txt : 20250306
<SEC-HEADER>0001973141-25-000142.hdr.sgml : 20250306
<ACCEPTANCE-DATETIME>20250306161308
ACCESSION NUMBER:		0001973141-25-000142
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250306
DATE AS OF CHANGE:		20250306

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNOPSYS INC
		CENTRAL INDEX KEY:			0000883241
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		ORGANIZATION NAME:           	06 Technology
		IRS NUMBER:				561546236
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-19807
		FILM NUMBER:		25715372

	BUSINESS ADDRESS:	
		STREET 1:		675 ALMANOR AVE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94085
		BUSINESS PHONE:		6505845000

	MAIL ADDRESS:	
		STREET 1:		675 ALMANOR AVE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94085

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DE GEUS AART
		CENTRAL INDEX KEY:			0001249802
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		C/O SYNOPSYS, INC.
		STREET 2:		675 ALMANOR AVE.
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94085
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?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>0001249802</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
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  <formData>
    <issuerInfo>
      <issuerCik>0000883241</issuerCik>
      <issuerName>SYNOPSYS INC</issuerName>
      <secFileNumber>000-19807</secFileNumber>
      <issuerAddress>
        <com:street1>675 ALMANOR AVE</com:street1>
        <com:city>SUNNYVALE</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>94085</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>6505845000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DE GEUS AART</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>UBS Financial Services Inc.</name>
        <address>
          <com:street1>1000 Harbor Boulevard</com:street1>
          <com:street2>3rd Floor</com:street2>
          <com:city>Weehawken</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07086</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>15705</noOfUnitsSold>
      <aggregateMarketValue>6979652.22</aggregateMarketValue>
      <noOfUnitsOutstanding>154620076</noOfUnitsOutstanding>
      <approxSaleDate>03/06/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/06/2025</acquiredDate>
      <natureOfAcquisitionTransaction>Exercise of Stock Option</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>15705</amountOfSecuritiesAcquired>
      <paymentDate>03/06/2025</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>03/06/2025</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>03/25/2024</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ UBS Financial Services Inc. as attorney-in-fact for Aart De Geus</signature>
    </noticeSignature>
  </formData>
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