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DIMENSIONAL FUND ADVISORS LP
> SWSI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | Superior Well Services, INC | SWSI | 964,634 | 50,688 | 16,129,000 | 3,900,000 | $16.72 |
| 03/31/2010 | Superior Well Services, INC | SWSI | 913,946 | 43,868 | 12,229,000 | -178,000 | $13.38 |
| 12/31/2009 | Superior Well Services, INC | SWSI | 870,078 | -55,942 | 12,407,000 | 3,443,000 | $14.26 |
| 09/30/2009 | Superior Well Services, INC | SWSI | 926,020 | 178,641 | 8,964,000 | 4,517,000 | $9.68 |
| 06/30/2009 | Superior Well Services, INC | SWSI | 747,379 | 221,766 | 4,447,000 | 1,752,000 | $5.95 |
| 03/31/2009 | Superior Well Services, INC | SWSI | 525,613 | -17,753 | 2,695,000 | -2,739,000 | $5.13 |
| 12/31/2008 | Superior Well Services, INC | SWSI | 543,366 | 70,687 | 5,434,000 | -6,530,000 | $10.00 |
| 09/30/2008 | Superior Well Services, INC | SWSI | 472,679 | 472,679 | 11,964,000 | 11,964,000 | $25.31 |
| 06/30/2008 | Superior Well Services, INC | SWSI | 472,979 | 472,979 | 14,998,000 | 14,998,000 | $31.71 |
| 03/31/2008 | Superior Well Services, INC | SWSI | 467,139 | 467,139 | 10,216,000 | 10,216,000 | $21.87 |
| 12/31/2007 | Superior Well Services, INC | SWSI | 445,977 | 36,064 | 9,464,000 | 147,000 | $21.22 |
| 09/30/2007 | Superior Well Services, INC | SWSI | 409,913 | 138,625 | 9,317,000 | 2,424,000 | $22.73 |
| 06/30/2007 | Superior Well Services, INC | SWSI | 271,288 | 218,588 | 6,893,000 | 5,689,000 | $25.41 |
| 03/31/2007 | Superior Well Services, INC | SWSI | 52,700 | 52,700 | 1,204,000 | 1,204,000 | $22.85 |
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