2021 Top 100
23: AT&T Inc.
| Top 100 Revenue: | $1,812,806,000 |
| Defense Revenue: | $288,816,000 |
| Civilian Revenue: | $1,523,990,000 |
| 2020 Revenue: | N/A |
| 2020 Earnings: | N/A |
| 2019 Revenue: | $181.2 billion |
| 2019 Earnings: | $15 billion |
| Number of employees: | N/A |
| Headquarters: | San Antonio |
| Website: | www.att.com |
| Leadership: | N/A |
| Ticker: | T |
| Lines of business: | N/A |
| Major customers: | N/A |
| Major contracts/projects: | N/A |