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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	Disposition	2015-02-11	27,409	$0.00	261,811	No	5	Z	Direct
Common Stock	Acquisiton	2015-02-11	27,409	$0.00	827,501	No	5	Z	Indirect	By Trust 2
Common Stock	Disposition	2015-02-20	11,813	$0.00	249,998	No	5	Z	Direct
Common Stock	Acquisiton	2015-02-20	11,813	$0.00	839,314	No	5	Z	Indirect	By Trust 2
Common Stock	Acquisiton	2015-02-23	25,000	$14.59	274,998	No	4	M	Direct
Common Stock	Acquisiton	2015-02-23	50,000	$2.61	324,998	No	4	M	Direct
Common Stock	Acquisiton	2015-02-23	370,589	$4.12	695,587	No	4	M	Direct
Common Stock	Acquisiton	2015-02-23	250,000	$4.20	945,587	No	4	M	Direct
Common Stock	Disposition	2015-02-23	695,589	$18.43	249,998	No	4	S	Direct
Common Stock	Acquisiton	2015-02-24	79,411	$4.12	329,409	No	4	M	Direct
Common Stock	Acquisiton	2015-02-24	41,000	$2.61	370,409	No	4	M	Direct
Common Stock	Disposition	2015-02-24	120,411	$18.62	249,998	No	4	S	Direct
Common Stock	Acquisiton	2015-02-25	9,000	$2.61	258,998	No	4	M	Direct
Common Stock	Acquisiton	2015-02-25	70,174	$4.12	329,172	No	4	M	Direct
Common Stock	Disposition	2015-02-25	79,174	$18.67	249,998	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	5	Z	Direct
No	5	Z	Indirect	By Trust 2
No	5	Z	Direct
No	5	Z	Indirect	By Trust 2
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
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	2015-02-23	25,000	$0.00	25,000	$14.59
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-23	50,000	$0.00	50,000	$2.61
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-23	370,589	$0.00	370,589	$4.12
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-23	250,000	$0.00	250,000	$4.20
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-24	79,411	$0.00	79,411	$4.12
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-24	41,000	$0.00	41,000	$2.61
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-25	9,000	$0.00	9,000	$2.61
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-25	70,174	$0.00	70,174	$4.12

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2006-03-31	2015-04-01	No	4	M	Direct
50,000	2009-01-08	2015-12-15	No	4	M	Direct
529,411	2010-01-08	2016-01-08	No	4	M	Direct
465,000	2009-03-05	2016-02-05	No	4	M	Direct
450,000	2010-01-08	2016-01-08	No	4	M	Direct
9,000	2009-01-08	2015-12-15	No	4	M	Direct
0	2009-01-08	2015-12-15	No	4	M	Direct
379,826	2010-01-08	2016-01-08	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	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 L Tan & N Lee & W Lee Trustees, Pacvan Walden Inc.
Shares transferred to the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.
Shares held by the Lip-Bu and Ysa Loo Trust date 2/3/1992.
The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.