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Form 4 THORATEC CORP For: May 21 Filed by: GROSSMAN D KEITH

May 26, 2015 6:10 PM EDT
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person *
GROSSMAN D KEITH

(Last) (First) (Middle)
6035 STONERIDGE DRIVE

(Street)
PLEASANTON CA 94588

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
THORATEC CORP [ THOR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
President & Chief Exec Officer
3. Date of Earliest Transaction (Month/Day/Year)
05/21/2015
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 05/21/2015   F   2,069 (1) D $ 45.15 176,406 D  
Common Stock 05/21/2015   G   3,436 D $ 0 (3) 172,970 D  
Common Stock 05/21/2015   G   3,436 A $ 0 (3) 30,204 I (2) By Separate Property Trust
Common Stock 05/26/2015   F   1,004 (1) D $ 45.48 171,966 D  
Common Stock 05/26/2015   G   1,664 D $ 0 (3) 170,302 D  
Common Stock 05/26/2015   G   1,664 A $ 0 (3) 31,868 I (2) By Separate Property Trust
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. Shares tendered in payment of the tax withholding obligation.
2. D. Keith Grossman & Hallie Hildebrand Grossman, TTEES Grossman Family Trust
3. Restricted stock units were granted pursuant to the Company's Amended and Restated 2006 Incentive Stock Plan with no payment received for the restricted stock units.
/s/D. Keith Grossman 05/26/2015
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

POWER OF ATTORNEY FOR SECTION 16 REPORTING

The undersigned hereby appoints David A. Lehman, in his capacity as Senior Vice President and General Counsel of Thoratec Corporation (the "Company"), Taylor C. Harris, in his capacity as Vice President and Chief Financial Officer of the Company, and any of them with full power of substitution or their respective successors in any such offices, as the attorney-in-fact of the undersigned to execute and file with the Securities and Exchange Commission ("SEC") and any other authority required by the rules and regulations of the SEC or any market or exchange on which shares of the Company are traded and to submit to the Company, in the place and stead of the undersigned, SEC Forms 3, 4 and 5 and any successor reporting forms required by the SEC in connection with purchases and sales of securities of the Company. This Power of Attorney supersedes and revokes all previous Powers of Attorney executed for the undersigned with respect to the filings of SEC Forms 3, 4 and 5 regarding the purchases and sales of securities of the Company and shall be effective until revoked by a written instrument executed by the undersigned and delivered to the Company at its headquarters to the attention of the General Counsel.

Dated: October 20, 2014

By: /s/ D. Keith Grossman
Name: D. Keith Grossman

Title: President, Chief Executive Officer
Thoratec Corporation
 
 



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