X0303 4 2011-03-04 0 0001076930 GSI GROUP INC GSIG 0001197817 BELLANTUONI ANTHONY J GSI GROUP CORPORATION 125 MIDDLESEX TURNPIKE BEDFORD MA 01730 0 1 0 0 VP, Corporate Resources Common Stock 2011-03-04 4 A 0 438 0 A 19967 D On July 23, 2010 (the "Effective Date"), the Final Fourth Modified Joint Chapter 11 Plan of Reorganization for MES International Inc. ("MES"), GSI Group Inc. (the "Company") and GSI Group Corporation ("GSI" and, collectively with MES and the Company, the "Debtors"), as confirmed by the United States Bankruptcy Court for the District of Delaware on May 27, 2010 (the "Plan"), became effective and the Debtors emerged from Chapter 11 protection. In connection with the Plan, (i) all common shares and vested share rights of the Company that were outstanding prior to the Effective Date (collectively, the "Old Common Shares"), were issued to holders of such Old Common Shares under the Final Plan on a one-for-one basis, subject to a 6.165% escrow as contemplated in the Plan. On March 4, 2011, the New Common Shares subject to the 6.165% escrow were released to the Reporting Person. Reflects the Company's 1 for 3 reverse stock split effectuated on December 29, 2010. Anthony J. Bellantuoni 2011-03-07