UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of report (Date of earliest event reported): May 7, 2009
(Exact name of registrant as specified in its charter)
California
(State of Other Jurisdiction of Incorporation)
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| 000-49798
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94-2340464 |
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| (Commission File Number)
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(IRS Employer Identification
Number) |
6035 Stoneridge Drive
Pleasanton, California 94588
(Address of principal executive offices including zip code)
(925) 847-8600
(Registrant’s telephone number, including area code)
Not Applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant under any of the following provisions:
o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
TABLE OF CONTENTS
Item 2.02 Results of Operations and Financial Condition
On May 7, 2009, Thoratec Corporation (the “Company”) issued a press release announcing its first
quarter ended April 4, 2009 results, the text of which is attached hereto as Exhibit 99.1.
The information in this Current Report on Form 8-K, including the exhibit, is furnished pursuant to
Item 2.02 and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange
Act of 1934, as amended, or otherwise subject to the liabilities under that Section. Furthermore,
the information in the Current Report on Form 8-K, including the exhibit, shall not be deemed to be
incorporated by reference into the filings of the Company under the Securities Act of 1933, as
amended.