97. GSI Group

Headquarters: Billerica Sector: Technology Symbol / Exchange: GSIG / Nasdaq Employees: 1,363 RANK 45/100 Chief executive: Sergio Edelstein Market value: $330.6 million RANK 67/100 2007 revenue: $317.8 million RANK 54/100 2007 net income: $19.0 million RANK 66/100 On the net: lumonics.com

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