| Rank | Company | Operating income | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $2.59B | Industrials | Professional Services | United States | Nasdaq | |
| 2 | $612M | Industrials | Professional Services | United States | Nasdaq | |
| 3 | $187M | Industrials | Professional Services | United States | Nasdaq | |
| 4 | $142M | Industrials | Professional Services | United States | Nasdaq | |
| 5 | $128M | Industrials | Professional Services | United States | Nasdaq | |
| 6 | $124M | Industrials | Professional Services | United States | Nasdaq | |
| 7 | $100M | Industrials | Professional Services | United States | Nasdaq | |
| 8 | $52.3M | Industrials | Professional Services | United States | Nasdaq | |
| 9 | $40.7M | Industrials | Professional Services | United States | Nasdaq | |
| 10 | $31.2M | Industrials | Professional Services | United States | Nasdaq | |
| 11 | $20.6M | Industrials | Professional Services | United States | Nasdaq | |
| 12 | $17.7M | Industrials | Professional Services | United States | Nasdaq | |
| 13 | $7.06M | Industrials | Professional Services | United States | Nasdaq | |
| 14 | $3.85M | Industrials | Professional Services | United States | Nasdaq | |
| 15 | $0.68M | Industrials | Professional Services | United States | Nasdaq |