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Guerrilla Capital Management, L.L.C.
> GSI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2012 | GSI GROUP INC | GSI | 41,885 | -2,100 | 54,000 | 46,000 | $1.29 |
| 06/30/2012 | GSI GROUP INC | GSI | 43,985 | -60,397 | 8,000 | -102,000 | $0.18 |
| 03/31/2012 | GSI GROUP INC | GSI | 104,382 | -100,000 | 110,000 | -133,000 | $1.05 |
| 12/31/2011 | GSI GROUP INC | GSI | 204,382 | 0 | 202,000 | -41,000 | $0.99 |
| 09/30/2011 | GSI GROUP INC | GSI | 204,382 | 0 | 243,000 | -62,000 | $1.19 |
| 06/30/2011 | GSI GROUP INC | GSI | 204,382 | 170,000 | 305,000 | 222,000 | $1.49 |
| 03/31/2011 | GSI GROUP INC | GSI | 34,382 | 0 | 83,000 | -16,000 | $2.41 |
| 12/31/2010 | GSI GROUP INC | GSI | 34,382 | -1,000 | 99,000 | 3,000 | $2.88 |
| 09/30/2010 | GSI GROUP INC | GSI | 35,382 | 2,200 | 96,000 | 18,000 | $2.71 |
| 06/30/2010 | GSI GROUP INC | GSI | 33,182 | 0 | 78,000 | -58,000 | $2.35 |
| 03/31/2010 | GSI GROUP INC | GSI | 33,182 | 0 | 136,000 | -10,000 | $4.10 |
| 12/31/2009 | GSI GROUP INC | GSI | 33,182 | 33,182 | 146,000 | 146,000 | $4.40 |
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