| Location: | Centreville, Va. |
| Total Federal IT revenue: | $120,893,000 |
| Leadership: | Greta Nolan, CEO and president |
| Web site: | http://fourinc.com/ |
| Rank Last Year: | 2 |
| Graduation Date: | 12/10/2018 |
| Lines of business: | Managed services, software-as-a-service, cloud computing, project management, enterprise license management |
| Major customers: | Air Force, Army, Navy, Marine Corps, Agriculture, Commerce, Energy, Education, DOJ, DOL, State, DOT, VA, Congress |