<SEC-DOCUMENT>0001193125-18-094118-index.html : 20180323
<SEC-HEADER>0001193125-18-094118.hdr.sgml : 20180323
<ACCEPTANCE-DATETIME>20180323160833
ACCESSION NUMBER:		0001193125-18-094118
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20180323
DATE AS OF CHANGE:		20180323
EFFECTIVENESS DATE:		20180323

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CADENCE DESIGN SYSTEMS INC
		CENTRAL INDEX KEY:			0000813672
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				770148231
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1229

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15867
		FILM NUMBER:		18710187

	BUSINESS ADDRESS:	
		STREET 1:		2655 SEELY AVENUE BLDG 5
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95134
		BUSINESS PHONE:		4089431234

	MAIL ADDRESS:	
		STREET 1:		2655 SEELY AVENUE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95134

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ECAD INC /DE/
		DATE OF NAME CHANGE:	19880609
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d464407ddefa14a.htm
<DESCRIPTION>DEFINITIVE ADDITIONAL MATERIALS
<TEXT>
Document 1 - file: d464407ddefa14a.htm

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g464407img01b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g464407img01b.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g464407img01d.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g464407img01d.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g464407img01e.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g464407img01e.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g464407img01f.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g464407img01f.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g464407img01g.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g464407img01g.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g464407new01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g464407new01.jpg

</DOCUMENT>
</SEC-DOCUMENT>