| Rank | Company | Operating income | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $320M | Energy | Coal | United States | Nasdaq | |
| 2 | $229M | Energy | Coal | United States | NYSE | |
| 3 | $112M | Energy | Coal | United States | NYSE | |
| 4 | $79.6M | Energy | Coal | United States | NYSE | |
| 5 | $23.1M | Energy | Coal | United States | NYSE |