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VANGUARD GROUP INC
> SWSI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | Superior Well Services, INC | SWSI | 991,966 | 34,013 | 16,586,000 | 3,769,000 | $16.72 |
| 03/31/2010 | Superior Well Services, INC | SWSI | 957,953 | 83,656 | 12,817,000 | 349,000 | $13.38 |
| 12/31/2009 | Superior Well Services, INC | SWSI | 874,297 | 122,838 | 12,468,000 | 5,194,000 | $14.26 |
| 09/30/2009 | Superior Well Services, INC | SWSI | 751,459 | 25,161 | 7,274,000 | 3,115,000 | $9.68 |
| 06/30/2009 | Superior Well Services, INC | SWSI | 726,298 | 77,616 | 4,159,000 | 831,000 | $5.73 |
| 03/31/2009 | Superior Well Services, INC | SWSI | 648,682 | 58,499 | 3,328,000 | -2,573,000 | $5.13 |
| 12/31/2008 | Superior Well Services, INC | SWSI | 590,183 | 67,251 | 5,901,000 | -7,335,000 | $10.00 |
| 09/30/2008 | Superior Well Services, INC | SWSI | 522,932 | 507,158 | 13,236,000 | 12,738,555 | $25.31 |
| 06/30/2008 | Superior Well Services, INC | SWSI | 15,774 | 4,616 | 497,445 | -12,765 | $31.54 |
| 03/31/2008 | Superior Well Services, INC | SWSI | 11,158 | 11,158 | 510,210 | 510,210 | $45.73 |
| 12/31/2007 | Superior Well Services, INC | SWSI | 10,361 | 10,361 | 488,239 | 488,239 | $47.12 |
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