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ZWEIG DIMENNA PARTNERS L P
> PTEN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2011 | PATTERSON UTI ENERGY INC | PTEN | 0 | -55,420 | 0 | -961,000 | |
| 09/30/2011 | PATTERSON UTI ENERGY INC | PTEN | 55,420 | 55,420 | 961,000 | 961,000 | $17.34 |
| 06/30/2007 | PATTERSON UTI ENERGY INC | PTEN | 0 | -519,900 | 0 | -10,112,000 | |
| 03/31/2005 | PATTERSON UTI ENERGY INC | PTEN | 0 | -519,900 | 0 | -10,112,000 | |
| 12/31/2004 | PATTERSON UTI ENERGY INC | PTEN | 519,900 | 274,900 | 10,112,000 | 5,440,000 | $19.45 |
| 09/30/2004 | PATTERSON UTI ENERGY INC | PTEN | 245,000 | 245,000 | 4,672,000 | 4,672,000 | $19.07 |
| 09/30/2003 | PATTERSON UTI ENERGY INC | PTEN | 0 | -710,000 | 0 | -22,983,000 | |
| 06/30/2003 | PATTERSON UTI ENERGY INC | PTEN | 710,000 | 710,000 | 22,983,000 | 22,983,000 | $32.37 |
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