X0306 4 2014-02-27 0 0000350907 THORATEC CORP THOR 0001307313 Burbach Gerhard F 6035 STONERIDGE DRIVE PLEASANTON CA 94588 1 1 0 0 Chief Executive Officer Common Stock 2014-02-27 4 M 0 5000 23.62 A 161307 D Common Stock 2014-02-27 4 S 0 5000 37.0028 D 156307 D Common Stock 2014-03-03 4 F 0 14440 36.24 D 141867 D Non-Qualified Stock Option (right to buy) 23.62 2014-02-27 4 M 0 5000 0 D 2007-01-17 2016-01-17 Common Stock 5000 22104 D 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 exercised and shares of Common Stock sold pursuant to a Sales Plan established by the Reporting Person on September 9, 2013, 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 $37.00 to $37.01. 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. Shares tendered in payment of the tax withholding obligation. /s/Gerhard F. Burbach 2014-03-03