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    Patterson-UTI Energy Inc. (PTEN)

    -NasdaqGS
    21.15 Down 0.01(0.02%) Apr 27, 4:00PM EDT
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    Major HoldersGet Major Holders for:
    Breakdown
    % of Shares Held by All Insider and 5% Owners:3%
    % of Shares Held by Institutional & Mutual Fund Owners:95%
    % of Float Held by Institutional & Mutual Fund Owners:97%
    Number of Institutions Holding Shares:358

    Major Direct Holders (Forms 3 & 4)
    HolderSharesReported
    SIEGEL MARK S908,546Apr 22, 2015
    VOLLMER JOHN E III630,000Apr 21, 2015
    BERNS KENNETH N349,422Apr 22, 2015
    TALBOTT CLOYCE A293,476Jan 1, 2015
    HENDRICKS WILLIAM ANDREW JR261,490Apr 24, 2015


    Top Institutional Holders
    HolderShares% OutValue*Reported
    Vanguard Group, Inc. (The)8,731,2595.96144,851,586Dec 31, 2014
    Artisan Partners Limited Partnership8,526,6685.82141,457,422Dec 31, 2014
    BlackRock Fund Advisors4,773,3413.2679,189,727Dec 31, 2014
    AJO, LP4,642,2103.1777,014,263Dec 31, 2014
    State Street Corporation4,361,2652.9872,353,386Dec 31, 2014
    BlackRock Institutional Trust Company, N.A.4,081,6452.7967,714,490Dec 31, 2014
    JP Morgan Chase & Company3,870,8892.6464,218,048Dec 31, 2014
    Dimensional Fund Advisors LP3,246,3922.2253,857,643Dec 31, 2014
    Prudential PLC3,190,3002.1852,927,077Dec 31, 2014
    Wellington Management Company, LLP15,995,75310.92265,369,542Dec 31, 2014

    Top Mutual Fund Holders
    HolderShares% OutValue*Reported
    Artisan Mid Cap Value Fund4,831,9993.3080,162,863Dec 31, 2014
    Vanguard Small-Cap Index Fund2,430,5771.6640,323,272Dec 31, 2014
    Vanguard Total Stock Market Index Fund2,317,9321.5838,454,491Dec 31, 2014
    iShares Core S&P Midcap ETF2,238,3611.5341,812,583Feb 28, 2015
    Hartford Mid Cap Fund2,134,0001.4636,619,440Jan 31, 2015
    Prudential Jennison Natural Resources Fd1,869,6781.2834,925,585Feb 28, 2015
    American Century Heritage Fund1,873,4241.2831,080,104Dec 31, 2014
    Vanguard Explorer Fund, Inc.1,579,9701.0827,112,285Jan 31, 2015
    Vanguard Specialized-Energy Fund1,528,0001.0426,220,480Jan 31, 2015
    JP Morgan Small Cap Equity Fund1,468,7281.0027,435,839Feb 28, 2015

    View Transactions for Insiders & Institutional Holders

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

    Currency in USD.