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PROSPECTOR PARTNERS LLC
> MXGL
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2010 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 395,104 | -178,996 | 9,084,000 | -3,718,000 | $22.99 |
| 12/31/2009 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 574,100 | -49,300 | 12,802,000 | -520,000 | $22.30 |
| 09/30/2009 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 623,400 | 142,000 | 13,322,000 | 4,435,000 | $21.37 |
| 06/30/2009 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 481,400 | 1,600 | 8,887,000 | 615,000 | $18.46 |
| 03/31/2009 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 479,800 | -112,300 | 8,272,000 | -2,208,000 | $17.24 |
| 12/31/2008 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 592,100 | 592,100 | 10,480,000 | 10,480,000 | $17.70 |
| 09/30/2008 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 358,000 | 105,260 | 8,316,000 | 2,925,000 | $23.23 |
| 06/30/2008 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 252,740 | 182,300 | 5,391,000 | 3,546,000 | $21.33 |
| 03/31/2008 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 70,440 | -41,300 | 1,845,000 | -1,283,000 | $26.19 |
| 12/31/2007 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 111,740 | -960 | 3,128,000 | -32,000 | $27.99 |
| 09/30/2007 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 112,700 | -122,800 | 3,160,000 | -3,504,000 | $28.04 |
| 06/30/2007 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 235,500 | 0 | 6,664,000 | 664,000 | $28.30 |
| 03/31/2007 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 235,500 | 20,900 | 6,000,000 | 674,000 | $25.48 |
| 12/31/2006 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 214,600 | 13,700 | 5,326,000 | 713,000 | $24.82 |
| 09/30/2006 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 200,900 | 20,200 | 4,613,000 | 667,000 | $22.96 |
| 06/30/2006 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 180,700 | 8,900 | 3,946,000 | -143,000 | $21.84 |
| 03/31/2006 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 171,800 | 12,100 | 4,089,000 | -59,000 | $23.80 |
| 12/31/2005 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 159,700 | 52,900 | 4,148,000 | 1,500,000 | $25.97 |
| 09/30/2005 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 106,800 | -13,800 | 2,648,000 | -114,000 | $24.79 |
| 06/30/2005 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 120,600 | 21,500 | 2,762,000 | 430,000 | $22.90 |
| 03/31/2005 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 99,100 | 30,300 | 2,332,000 | 865,000 | $23.53 |
| 12/31/2004 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 68,800 | 68,800 | 1,467,000 | 1,467,000 | $21.32 |
| 09/30/2004 | ALTERRA CAPITAL HOLDINGS Ltd | MXGL | 13,400 | 13,400 | 268,000 | 268,000 | $20.00 |
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