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    Thoratec Corp. (THOR)

    -NasdaqGS
    63.23 Up 0.33(0.52%) 4:00PM EDT
    |After Hours : 63.23 0.00 (0.00%) 5:06PM EDT
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    Major HoldersGet Major Holders for:
    Breakdown
    % of Shares Held by All Insider and 5% Owners:1%
    % of Shares Held by Institutional & Mutual Fund Owners:90%
    % of Float Held by Institutional & Mutual Fund Owners:91%
    Number of Institutions Holding Shares:249

    Major Direct Holders (Forms 3 & 4)
    HolderSharesReported
    GROSSMAN D KEITH170,302May 26, 2015
    BURBACH GERHARD F169,970Mar 17, 2014
    LEHMAN DAVID AARON54,775Mar 17, 2015
    HARRIS TAYLOR C.53,599Jun 15, 2015
    COLE J DANIEL50,938May 5, 2015


    Top Institutional Holders
    HolderShares% OutValue*Reported
    Price (T.Rowe) Associates Inc5,363,1799.90224,663,562Mar 31, 2015
    Vanguard Group, Inc. (The)3,546,4666.54148,561,457Mar 31, 2015
    Eagle Asset Management Inc2,865,4375.29127,712,527Jun 30, 2015
    BlackRock Fund Advisors2,731,1415.04114,407,493Mar 31, 2015
    Palo Alto Investors, LLC2,538,2034.68106,325,321Mar 31, 2015
    State Street Corporation1,892,7713.4979,288,175Mar 31, 2015
    BlackRock Advisors, LLC1,782,5883.2974,672,609Mar 31, 2015
    BlackRock Institutional Trust Company, N.A.1,573,4482.9065,911,735Mar 31, 2015
    Millennium Management LLC1,550,0892.8664,933,226Mar 31, 2015
    Oracle Investment Management, Inc.1,232,6002.2751,633,612Mar 31, 2015

    Top Mutual Fund Holders
    HolderShares% OutValue*Reported
    Price (T.Rowe) Health Sciences Fund1,675,3003.0970,178,315Mar 31, 2015
    Eagle Series Tr-Eagle Small Cap Growth Fund1,079,2811.9945,211,080Mar 31, 2015
    Vanguard Small-Cap Index Fund979,7081.8141,039,967Mar 31, 2015
    Vanguard Total Stock Market Index Fund961,1131.7740,261,022Mar 31, 2015
    Price (T.Rowe) Small Cap Stock Fund949,3001.7539,766,176Mar 31, 2015
    Neuberger & Berman Genesis Fund873,9001.6136,607,670Mar 31, 2015
    iShares Core S&P Midcap ETF857,2311.5838,909,714May 31, 2015
    Price (T.Rowe) Small-Cap Value Fund797,3061.4733,399,147Mar 31, 2015
    iShares Russell 2000 ETF792,9401.4635,991,545May 31, 2015
    Vanguard Small-Cap Growth Index Fund632,0551.1726,476,783Mar 31, 2015

    View Transactions for Insiders & Institutional Holders

    Value shown is computed using the security's price on the report date given.

    Currency in USD.