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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
813672	Cadence Design Systems Inc	CDNS	Services-Prepackaged Software (7372)	770148231

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1008463	Bu Lip Tan	2655 Seely Avenue, Bldg. 5 San Jose CA 95134	President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2015-10-20	155,000	$4.20	342,498	No	4	M	Direct
Common Stock	Disposition	2015-10-20	155,000	$21.19	187,498	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-10-20	155,000	$0.00	155,000	$4.20

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2009-03-05	2016-02-05	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	31,400	Indirect	Held by IRA
Common Stock	51,000	Indirect	Held by Child 1
Common Stock	15,000	Indirect	By Trust 1
Common Stock	890,944	Indirect	By Trust 2
Common Stock	7,000	Indirect	By Trust 3

Footnotes

Shares held by IRA FBO Lip-Bu Tan DB Securities Inc. Custodian Rollover Account DTD 5/19/1997.
Shares held by A&E Investment LLC, the sole member of which is the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.
Shares held by the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.
Shares held by L Tan & N Lee & W Lee Trustees, Pacven Walden Inc.
The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.