| INSIDER TRANSACTIONS REPORTED - LAST TWO YEARS |
| Date | Insider | Shares | Type | Transaction | Value* | | 26-Aug-08 | GSI GROUP INC Beneficial Owner (10% or more) | 202,964 | Direct | Purchase at $32 per share. | $6,494,848 | | 25-Aug-08 | GSI GROUP INC Beneficial Owner (10% or more) | 606,313 | Direct | Purchase at $32 per share. | $19,402,016 | | 22-Aug-08 | GSI GROUP INC Beneficial Owner (10% or more) | 649,788 | Direct | Purchase at $32 per share. | $20,793,216 | | 21-Aug-08 | GSI GROUP INC Beneficial Owner (10% or more) | 84,303 | Direct | Purchase at $32 per share. | $2,697,696 | | 20-Aug-08 | GSI GROUP INC Beneficial Owner (10% or more) | 8,571,831 | Direct | Statement of Ownership | N/A | | 12-Feb-08 | VARISANO ALICE Officer | 962 | Direct | Sale at $26 per share. | $25,012 | | 25-Jan-08 | DOMINIC ANTOINE Officer | 7,300 | Direct | Disposition (Non Open Market) at $25.08 per share. | $183,084 | | 3-Jan-08 | VARISANO ALICE Officer | 2,835 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A | | 3-Jan-08 | DOMINIC ANTOINE Officer | 22,700 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
|
* = Where indicated, some values are estimates. 1 = Potential proceeds estimated by the filer. 2 = Estimated based on the average of multiple prices reported. 3 = Multiple dates reported. Most recent date shown. |
|