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Cortina Asset Management, LLC
> SWSI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | Superior Well Services, INC | SWSI | 603,105 | 43,169 | 10,084,000 | 2,592,000 | $16.72 |
| 03/31/2010 | Superior Well Services, INC | SWSI | 559,936 | -295,881 | 7,492,000 | -4,712,000 | $13.38 |
| 12/31/2009 | Superior Well Services, INC | SWSI | 855,817 | 384,231 | 12,204,000 | 7,639,000 | $14.26 |
| 09/30/2009 | Superior Well Services, INC | SWSI | 471,586 | 471,586 | 4,565,000 | 4,565,000 | $9.68 |
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