January 14, 2015
Securities and Exchange Commission
100 F Street NE
Washington, DC 20549
RE: Amended Schedule 13G
Thoratec Corp.
As of December 31, 2014
Gentlemen:
In accordance with Section 13(d)(5) of the Securities Exchange
Act of 1934, attached please find a copy of Schedule 13G for
the above named company showing beneficial ownership
since the last filing, as of December 31, 2014, filed
on behalf of Eagle Asset Management, Inc.
Very truly yours,
Damian Sousa
Vice President
Chief Compliance Officer
Enclosures
cc: Office of the Corporate Secretary
Thoratec Corp.
6035 Stoneridge Drive
Pleasonton, CA 94588
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Schedule 13G
Under the Securities Exchange Act of 1934
(Amendment No. 1 )*
Thoratec Corp.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
885175307
(CUSIP Number)
Check the following box if a fee is being paid with this statement
_____. (A fee is not required only if the filing person: (1) has
a previous statement on file reporting beneficial ownership of more
than five percent of the class of securities described in Item 1;
and (2) has filed no amendment subsequent thereto reporting beneficial
ownership of five percent or less of such class.) (See Rule 13d-7.)
*The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class
of securities, and for any subsequent amendment containing information
which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities
Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of
that section of the Act but shall be subject to all other provisions of
the Act (however, see the Notes).
Page 1 of 5 Pages
CUSIP NO. 885175307 13G
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Eagle Asset Management, Inc. 59-2385219
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (A) ______
(B) ______
3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
State of Florida
NUMBER OF 5 SOLE VOTING POWER
SHARES 1,653,193
BENEFICIALLY 6 SHARED VOTING POWER
OWNED - - -
AS OF
DECEMBER 31, 2014 7 SOLE DISPOSITIVE POWER
BY EACH 1,653,193
REPORTING 8 SHARED DISPOSITIVE POWER
PERSON WITH - - -
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,653,193
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[_____]
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
3.01%
12 TYPE OF REPORTING PERSON*
IA
_____________________________________________________________
Page 2 of 5 Pages
Item 1(a) Name of Issuer:
Thoratec Corp.
Item 1(b) Address of Issuer's Principal Executing Offices:
6035 Stoneridge Drive
Pleasonton, CA 94588
Item 2(a) Name of Person Filing:
Eagle Asset Management, Inc.
Item 2(b) Address of Principal Business Office:
880 Carillon Parkway
St. Petersburg, Florida 33716
Item 2(c) Citizenship:
Florida
Item 2(d) Title of Class of Securities:
Common Stock
Item 2(e) CUSIP Number:
885175307
Item 3 Type of Reporting Person:
(e) Investment Adviser registered under Section 203 of the Investment
Advisors Act of 1940
Page 3 of 5 Pages
Item 4 Ownership as of December 31, 2014
(a) Amount Beneficially Owned:
1,653,193 shares of common stock beneficially owned including:
No. of Shares
Eagle Asset Management, Inc. 1,653,193
(b) Percent of Class: 3.01%
(c) Deemed Voting Power and Disposition Power:
(i) (ii) (iii) (iv)
Deemed Deemed
Deemed Deemed to have to have
to have to have Sole Power Shared Power
Sole Power Shared Power to Dispose to Dispose
to Vote or to Vote or or to or to
to Direct to Direct Direct the Direct the
to Vote to Vote Disposition Disposition
Eagle Asset 1,653,193 ---- 1,653,193 ----
Management, Inc.
Item 5 Ownership of Five Percent or Less of a Class:
If this statement is being filed to report the fact that
as of the date hereof the reporting person has ceased to be the beneficial
owner of more than five percent of the class of securities, check the
following.
(_X__)
Item 6 Ownership of More than Five Percent on Behalf of Another Person:
N/A
Item 7 Identification and Classification of the Subsidiary which Acquired
the Security Being Reported on by the Parent Holding Company:
N/A
Page 4 of 5 Pages
Item 8 Identification and Classification of Members of the Group: N/A
Item 9 Notice of Dissolution of Group: N/A
Item 10 Certification:
By signing below I certify that to the best of my
knowledge and belief, the securities referred to above were acquired
in the ordinary course of business and were not acquired for purpose of
and do not have the effect of changing or influencing the control of
the issuer of such securities and were not acquired in connection with
or as a participant in any transaction having such purposes or effect.
Signature
After reasonable inquiry and to the best of my knowledge
and belief, I certify that the information set forth in this statement is
true, complete and correct.
Date: January 14, 2015 EAGLE ASSET MANAGEMENT, INC.
/s/ Damian Sousa
_________________________________
Damian Sousa
Vice President
Chief Compliance Officer
Page 5 of 5 Pages