X0303 4 2009-03-10 0 0001076930 GSI GROUP INC GSIGQ 0001281192 WEBB STEPHEN GSI GROUP CORPORATION 125 MIDDLESEX TURNPIKE BEDFORD MA 01730 0 1 0 0 Managing Director Common Stock 2009-03-10 4 S 0 761 0.5799 D 72139 D Common Stock 2009-03-10 4 S 0 1287 0.5799 D 70852 D Common Stock 2009-03-14 4 S 0 1802 0.7406 D 69050 D Common Stock 2009-03-26 4 S 0 1368 0.8292 D 67682 D Common Stock 2009-03-26 4 S 0 1554 0.8292 D 66128 D Common Stock 2010-03-14 4 S 0 1603 1.82 D 64525 D /s/Stephen Webb by Sergio Edelstein, Attorney-In-Fact 2010-03-31