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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
1218701	Daniel J Cole	6035 Stoneridge Drive Pleasanton CA 94588		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	2010-05-03	1,875	$14.91	65,000	No	4	M	Direct
Common Stock	Disposition	2010-05-03	20,000	$41.94	45,000	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	2010-05-03	1,875	$0.00	1,875	$14.91

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2005-05-24	2010-05-24	No	4	M	Direct

Footnotes

This option vested 100% on the grant date.
This option was granted pursuant to the Company's Incentive Stock Plan with no payment received for the option.
This transaction was executed in multiple trades in prices ranging from $41.6126 to $42.25. 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.