FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Harris Taylor C.

2. Date of Event Requiring Statement (MM/DD/YYYY)
10/10/2012 

3. Issuer Name and Ticker or Trading Symbol

THORATEC CORP [THOR]

(Last)        (First)        (Middle)

6035 STONERIDGE DRIVE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                            _____ 10% Owner
___ X ___ Officer (give title below)          _____ Other (specify below)
VP, Chief Financial Officer /

(Street)

PLEASANTON, CA 94588       

(City)              (State)              (Zip)
5. If Amendment, Date Original Filed (MM/DD/YYYY)

 

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 Beneficially Owned
1.Title of Security
(Instr. 4) 		2. Amount of Securities Beneficially Owned
(Instr. 4) 		3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5) 		4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock   18990   (1) D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4) 		2. Date Exercisable and Expiration Date
(MM/DD/YYYY) 		3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4) 		4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5) 		6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Options (right to buy)   3/15/2011   3/15/2020   Common Stock   10000   (2) $33.16   D    
Non-Qualified Stock Options (right to buy)   3/1/2012   3/1/2021   Common Stock   5775   (3) $27.30   D    
Non-Qualified Stock Options (right to buy)   3/9/2013   3/9/2022   Common Stock   6447   (4) $33.99   D    

Explanation of Responses:
( 1)  Includes 15,229 unvested Restricted Stock Units. The restricted stock units vest in four equal annual installments commencing one year after the grant date.
( 2)  Represents 5,000 exercisable Non-Qualified Stock Options and 5,000 Non-Qualified Stock Options scheduled to vest as follows: 2,500 shares on 03/15/2013 and 2,500 shares on 03/15/2014
( 3)  Represents 1,444 exercisable Non-Qualified Stock Options and 4,331 Non-Qualified Stock Options scheduled to vest as follows: 1,444 shares on 03/01/2013, 1,444 shares on 03/01/2014 and 1,443 shares on 03/01/2015
( 4)  Represents 6,447 Non-Qualified Stock Options scheduled to vest as follows: 1,612 shares on 03/09/2013, 1,612 shares on 03/09/2014, 1,612 shares on 03/09/2015 and 1,611 shares on 03/09/2016

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Harris Taylor C.
6035 STONERIDGE DRIVE
PLEASANTON, CA 94588

VP, Chief Financial Officer

Signatures
/s/Taylor C. Harris 10/17/2012
** 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 5(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 control number.
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