| Company | Op. income (TTM) | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|
| 1 | $2.59B | Industrials | Professional Services | United States | Nasdaq |
| 2 | $1.12B | Industrials | Professional Services | United States | NYSE |
| 3 | $778.63M | Industrials | Professional Services | United States | NYSE |
| 4 | $562.00M | Industrials | Professional Services | United States | NYSE |
U.S.-exchange common stocks; ADRs and funds excluded. 4 companies. Reported USD values. TTM means trailing twelve months; companies without a comparable value are excluded.