| 21.76 Data as of May 24 |  -0.19 / -0.87%Today’s Change | 12.81 Today|||52-Week Range 25.48 | +16.80% Year-to-Date |
| Mutual fund holders | 66.22% |
| Other institutional | 39.95% |
| Individual stakeholders | 3.06% |
| 3/31/2013 | SYSTEMATIC FINANCIAL MANAGEMENT ... Bought 4.8 Million shares of Patterson-UTI Energy Inc |
| 3/31/2013 | ARONSON & JOHNSON & ORTIZ LP Bought 3.5 Million shares of Patterson-UTI Energy Inc |
| 3/31/2013 | ING INVESTMENT MANAGEMENT CO. Bought 1.7 Million shares of Patterson-UTI Energy Inc |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Artisan Partners LP | 7.24% | 10,598,632 | 223,525,149 | -129,368 | -1.21% |
| BlackRock Fund Advisors | 5.31% | 7,768,012 | 163,827,373 | -17,680 | -0.23% |
| The Vanguard Group, Inc. | 4.98% | 7,297,126 | 153,896,387 | +344,883 | +4.96% |
| Herndon Capital Management LLC | 4.55% | 6,666,700 | 140,600,703 | +330,419 | +5.21% |
| Wellington Management Co. LLP | 3.48% | 5,089,195 | 107,331,123 | -7,276,691 | -58.84% |
| Systematic Financial Management L... | 3.30% | 4,832,050 | 101,907,935 | +4,832,050 | -- |
| SSgA Funds Management, Inc. | 3.23% | 4,721,811 | 99,582,994 | -159,164 | -3.26% |
| Investec Asset Management Ltd. | 2.88% | 4,220,589 | 89,012,222 | +65,092 | +1.57% |
| Aronson & Johnson & Ortiz LP | 2.54% | 3,717,700 | 78,406,293 | +3,543,700 | +2,036.61% |
| Waddell & Reed Investment Managem... | 2.37% | 3,475,850 | 73,305,677 | -208,250 | -5.65% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Artisan Mid Cap Value Fund | 5.39% | 7,895,174 | 166,509,220 | -66,200 | -0.83% |
| Wasatch Long/Short Fund | 2.40% | 3,508,342 | 73,990,933 | +427,042 | +13.86% |
| Heartland Value Plus Fund | 2.05% | 3,000,000 | 63,270,000 | -1,150,000 | -27.71% |
| Van Eck Global Hard Assets Fund | 1.77% | 2,592,300 | 54,671,607 | -61,000 | -2.30% |
| JPMorgan Small Cap Equity Fund | 1.75% | 2,564,720 | 54,089,945 | +31,360 | +1.24% |
| Vanguard Small Cap Index Fund | 1.49% | 2,173,935 | 45,848,289 | +2,173,935 | -- |
| Vanguard Total Stock Market Index... | 1.43% | 2,092,002 | 44,120,322 | +27,129 | +1.31% |
| Harbour Fund | 1.37% | 2,000,000 | 42,180,000 | 0 | 0.00% |
| Ivy Mid Cap Growth Fund | 1.30% | 1,908,700 | 40,254,483 | -113,630 | -5.62% |
| JPMorgan Mid Cap Core Fund | 1.28% | 1,878,200 | 39,611,238 | -294,200 | -13.54% |
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