2021 Top 100
1: Leidos Inc.
| Top 100 Revenue: | $9,243,885,000 |
| Defense Revenue: | $3,314,520,000 |
| Civilian Revenue: | $5,929,365,000 |
| 2020 Revenue: | N/A |
| 2020 Earnings: | N/A |
| 2019 Revenue: | $11.1 billion |
| 2019 Earnings: | $670 million |
| Number of employees: | N/A |
| Headquarters: | Reston, Va. |
| Website: | https://www.leidos.com/ |
| Leadership: | N/A |
| Ticker: | LDOS |
| Lines of business: | N/A |
| Major customers: | N/A |
| Major contracts/projects: | N/A |