| Location: | Burlington, Mass. |
| Annual growth rate: | 69.6% |
| 2008 revenue: | $16,907,346 |
| 2007 revenue: | $16,785,853 |
| 2006 revenue: | $9,157,000 |
| 2005 revenue: | $4,516,500 |
| 2004 revenue: | $2,042,000 |
| Leadership: | Chandu Shah, president and CEO |
| Number of employees: | 120 |
| Web site: | http://www.s4inc.com |