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DUQUESNE CAPITAL MANAGEMENT L L C
> CBST
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2010 | CUBIST PHARMACEUTICALS INC | CBST | 927,005 | 227,005 | 19,838,000 | 3,465,000 | $21.40 |
| 09/30/2010 | CUBIST PHARMACEUTICALS INC | CBST | 700,000 | 275,000 | 16,373,000 | 7,618,000 | $23.39 |
| 06/30/2010 | CUBIST PHARMACEUTICALS INC | CBST | 425,000 | 425,000 | 8,755,000 | 8,755,000 | $20.60 |
| 12/31/2008 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -63,500 | 0 | -1,302,000 | |
| 03/31/2008 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -63,500 | 0 | -1,302,000 | |
| 12/31/2007 | CUBIST PHARMACEUTICALS INC | CBST | 63,500 | 63,500 | 1,302,000 | 1,302,000 | $20.50 |
| 09/30/2007 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -480,000 | 0 | -9,461,000 | |
| 06/30/2007 | CUBIST PHARMACEUTICALS INC | CBST | 480,000 | 480,000 | 9,461,000 | 9,461,000 | $19.71 |
| 03/31/2007 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -570,000 | 0 | -7,507,000 | |
| 09/30/2005 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -570,000 | 0 | -7,507,000 | |
| 06/30/2005 | CUBIST PHARMACEUTICALS INC | CBST | 570,000 | 570,000 | 7,507,000 | 7,507,000 | $13.17 |
| 09/30/2003 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -129,900 | 0 | -3,767,100 | |
| 03/31/2001 | CUBIST PHARMACEUTICALS INC | CBST | 0 | -129,900 | 0 | -3,767,100 | |
| 12/31/2000 | CUBIST PHARMACEUTICALS INC | CBST | 129,900 | 129,900 | 3,767,100 | 3,767,100 | $29.00 |
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