| Rank | Company | Revenue | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $4.27B | Energy | Coal | United States | NYSE | |
| 2 | $4.01B | Energy | Coal | United States | NYSE | |
| 3 | $2.07B | Energy | Coal | United States | NYSE | |
| 4 | $1.68B | Energy | Coal | United States | NYSE | |
| 5 | $278M | Energy | Coal | United States | NYSE | |
| 6 | $200M | Energy | Coal | United States | NYSE |