| Rank | Company | Operating income | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $5.95B | Industrials | Specialty Business Services | United States | Nasdaq | |
| 2 | $4.66B | Industrials | Specialty Business Services | United States | Nasdaq | |
| 3 | $2.91B | Industrials | Specialty Business Services | United States | Nasdaq | |
| 4 | $2.46B | Industrials | Specialty Business Services | United States | Nasdaq | |
| 5 | $712M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 6 | $588M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 7 | $456M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 8 | $364M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 9 | $351M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 10 | $333M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 11 | $215M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 12 | $171M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 13 | $138M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 14 | $112M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 15 | $77.0M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 16 | $44.1M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 17 | $39.3M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 18 | $35.4M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 19 | $34.5M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 20 | $20.5M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 21 | $17.1M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 22 | $10.9M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 23 | $3.59M | Industrials | Specialty Business Services | United States | Nasdaq | |
| 24 | $3.01M | Industrials | Specialty Business Services | United States | Nasdaq |