THORATEC CORP

Certification of termination of registration of a class of securities (Section 12(g))

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

8.01,9.01

1.02,2.01,3.01,3.03,5.01,5.02,5.03,5.07,9.01

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Notification of removal from listing and/or registration on a national securities exchange

8.01

Additional Information for Proxy Statement/ Votes

No description available

Other Events

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

2.02,9.01

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

1.01,5.02,5.03,8.01,9.01

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

5.07

2.02,9.01

5.03,9.01

5.02

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d)

2.02,9.01

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

5.02,9.01

5.02,5.03,9.01

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

1.01,8.01,9.01

Specialized Disclosure Report

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Letter from the SEC

Additional Information for Proxy Statement/ Votes

7.01

5.02

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

No description available

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

SCHERMERHORN TODD C

Antonucci Marta

COLE J DANIEL

COLLIS STEVEN H

DIMICK NEIL F

GROSSMAN D KEITH

Harris Taylor C.

HAWKINS WILLIAM A

LAVIOLETTE PAUL A

Lehman David Aaron

Marsh Martha H.

Padmanabhan Vasant

Pellegrini Niamh Louise

GROSSMAN D KEITH

Padmanabhan Vasant

Harris Taylor C.

DIMICK NEIL F

GROSSMAN D KEITH

LAVIOLETTE PAUL A

Antonucci Marta