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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
350907	Thoratec Corp	THOR	Electromedical & Electrotherapeutic Apparatus (3845)	942340464

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1354228	Aaron David Lehman	6035 Stoneridge Drive Pleasanton CA 94588	Svp And General Counsel	No	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
Common Stock	Acquisiton	2012-12-27	4,400	$17.91	47,765	No	4	M	Direct
Common Stock	Acquisiton	2012-12-27	4,375	$20.34	52,140	No	4	M	Direct
Common Stock	Disposition	2012-12-27	8,775	$37.41	43,365	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
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	2012-12-27	4,400	$0.00	4,400	$17.91
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2012-12-27	4,375	$0.00	4,375	$20.34

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
16,000	2008-02-13	2017-02-13	No	4	M	Direct
0	2007-02-24	2016-02-24	No	4	M	Direct

Footnotes

Options were granted pursuant to the Company's equity incentive plan with no payments received for the options.
Options vest in four equal annual installments commencing one year after the grant date.
Options vest 100% one year after the grant date.
Options exercised and shares of Common Stock sold pursuant to a Sales Plan established by the Reporting Person on November 26, 2012, which Sales Plan is intended to comply with the requirements of Rule 10b5-1(c)(1) under the Securities Exchange Act of 1934, as amended.
This transaction was executed in multiple trades in prices ranging from $37.11 to $37.61. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.