X0303 4/A 2008-03-14 2008-03-21 0 0001050925 GSI GROUP INC GSIGQ 0001281192 WEBB STEPHEN GSI GROUP CORPORATION 125 MIDDLESEX TURNPIKE BEDFORD MA 01730 0 1 0 0 Managing Director Common Stock 2008-03-14 4 A 0 12500 0 A 72900 D 12,500 time-based shares vest in three equal annual installments beginning on March 14, 2009. /s/Stephen Webb by Sergio Edelstein Attorney-In-Fact 2010-03-31