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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
1248380	F Neil Dimick	6035 Stoneridge Drive Pleasanton CA 94551		Yes	No	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	2012-05-23	5,579	$0.00	39,626	No	4	A	Direct
Common Stock	Disposition	2012-05-25	1,273	$31.47	38,353	No	4	S	Direct

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

Footnotes

Represents restricted stock units. Each restricted stock unit represents a right to receive one share of Thoratec Corporation common stock upon vesting. The restricted stock units vest in four equal annual installments commencing one year after the grant date.
Annual stock grant according to the Company's 2006 Incentive Stock Plan.
Restricted stock units were granted pursuant to the Company's 2006 Incentive Stock Plan with no payment received for the restricted stock units.
Shares of Common Stock sold pursuant to a Sales Plan established by the Reporting Person on March 2, 2012, which Sales Plan is intended to comply with the requirements of Rule 10b5-1(c)(1) under the Securities Exchange Act 1934, as amended.
This transaction was executed in multiple trades in prices ranging from $31.32 to $31.68. 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.