| Rank | Company | Operating income | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $2.59B | Industrials | Professional Services | United States | Nasdaq | |
| 2 | $1.12B | Industrials | Professional Services | United States | NYSE | |
| 3 | $1.05B | Industrials | Professional Services | United States | NYSE | |
| 4 | $779M | Industrials | Professional Services | United States | NYSE | |
| 5 | $631M | Industrials | Professional Services | United States | NYSE | |
| 6 | $612M | Industrials | Professional Services | United States | Nasdaq | |
| 7 | $562M | Industrials | Professional Services | United States | NYSE | |
| 8 | $380M | Industrials | Professional Services | United States | NYSE | |
| 9 | $205M | Industrials | Professional Services | United States | NYSE | |
| 10 | $187M | Industrials | Professional Services | United States | Nasdaq | |
| 11 | $142M | Industrials | Professional Services | United States | Nasdaq | |
| 12 | $128M | Industrials | Professional Services | United States | Nasdaq | |
| 13 | $124M | Industrials | Professional Services | United States | Nasdaq | |
| 14 | $100M | Industrials | Professional Services | United States | Nasdaq | |
| 15 | $52.3M | Industrials | Professional Services | United States | Nasdaq | |
| 16 | $50.8M | Industrials | Professional Services | United States | NYSE | |
| 17 | $40.7M | Industrials | Professional Services | United States | Nasdaq | |
| 18 | $31.2M | Industrials | Professional Services | United States | Nasdaq | |
| 19 | $20.6M | Industrials | Professional Services | United States | Nasdaq | |
| 20 | $17.7M | Industrials | Professional Services | United States | Nasdaq | |
| 21 | $7.75M | Industrials | Professional Services | United States | NYSE | |
| 22 | $7.06M | Industrials | Professional Services | United States | Nasdaq | |
| 23 | $6.43M | Industrials | Professional Services | United States | NYSE | |
| 24 | $3.85M | Industrials | Professional Services | United States | Nasdaq | |
| 25 | $1.55M | Industrials | Professional Services | United States | NYSE | |
| 26 | $0.68M | Industrials | Professional Services | United States | Nasdaq |