<SEC-DOCUMENT>0001249802-25-000009.txt : 20251209
<SEC-HEADER>0001249802-25-000009.hdr.sgml : 20251209
<ACCEPTANCE-DATETIME>20251209181012
ACCESSION NUMBER:		0001249802-25-000009
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251208
FILED AS OF DATE:		20251209
DATE AS OF CHANGE:		20251209

REPORTING-OWNER:	

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

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19807
		FILM NUMBER:		251560243

	MAIL ADDRESS:	
		STREET 1:		C/O SYNOPSYS, INC.
		STREET 2:		675 ALMANOR AVE.
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94085

ISSUER:		

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

	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
</SEC-HEADER>
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<SEQUENCE>1
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    <footnotes>
        <footnote id="F1">These shares were retained by the Company in order to meet the tax withholding obligations of the reporting person in connection with the vesting of an installment of the restricted stock unit award. The Compensation Committee approved the disposition of shares by the reporting person and the amount retained by the Company was not in excess of the amount of the tax liability.</footnote>
        <footnote id="F2">Each stock unit converts into one share of Synopsys common stock.</footnote>
        <footnote id="F3">25% of the units vest on the date shown followed by three equal annual installments, subject to continued service through each vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: POA pursuant Liz Ramirez For: Aart de Geus</signatureName>
        <signatureDate>2025-12-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
