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WELLINGTON MANAGEMENT GROUP LLP
> SWSI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | Superior Well Services, INC | SWSI | 709,494 | -800,102 | 11,863,000 | -8,335,000 | $16.72 |
| 03/31/2010 | Superior Well Services, INC | SWSI | 1,509,596 | -195,104 | 20,198,000 | -4,111,000 | $13.38 |
| 12/31/2009 | Superior Well Services, INC | SWSI | 1,704,700 | 741,100 | 24,309,000 | -6,247,000 | $14.26 |
| 06/30/2008 | Superior Well Services, INC | SWSI | 963,600 | -372,200 | 30,556,000 | 1,342,000 | $31.71 |
| 03/31/2008 | Superior Well Services, INC | SWSI | 1,335,800 | 1,335,800 | 29,214,000 | 29,214,000 | $21.87 |
| 12/31/2007 | Superior Well Services, INC | SWSI | 1,771,800 | 1,771,800 | 37,598,000 | 37,598,000 | $21.22 |
| 09/30/2007 | Superior Well Services, INC | SWSI | 1,676,600 | 1,676,600 | 38,109,000 | 38,109,000 | $22.73 |
| 06/30/2007 | Superior Well Services, INC | SWSI | 1,561,500 | 1,561,500 | 39,678,000 | 39,678,000 | $25.41 |
| 03/31/2007 | Superior Well Services, INC | SWSI | 890,500 | 890,500 | 20,348,000 | 20,348,000 | $22.85 |
| 12/31/2006 | Superior Well Services, INC | SWSI | 485,500 | 485,500 | 12,409,000 | 12,409,000 | $25.56 |
| 12/31/2005 | Superior Well Services, INC | SWSI | 0 | -233,700 | 0 | -5,396,000 | |
| 09/30/2005 | Superior Well Services, INC | SWSI | 233,700 | 233,700 | 5,396,000 | 5,396,000 | $23.09 |
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