| Revenues | — | — | — |
| Commissions | 711.71a | 662.96a | 641.18a |
| Information services | 50.54a | 46.38a | 39.31a |
| Post-trade services | 42.49a | 40.18a | 36.88a |
| Technology services | 12.36a | 3.02a | 0.93a |
| Total revenues | 817.1a | 752.55a | 718.3a |
| Expenses | — | — | — |
| Employee compensation and benefits | -235.88a | -206.93a | -182.1a |
| Depreciation and amortization | -73.82a | -70.56a | -61.45a |
| Technology and communications | -72.17a | -62.8a | -52.96a |
| Professional and consulting fees | -27.38a | -31.94a | -33.95a |
| Occupancy | -14.69a | -14.22a | -14.12a |
| Marketing and advertising | -11.71a | -11.05a | -9.98a |
| Clearing costs | -17.86a | -17a | -17.66a |
| General and administrative | -22.71a | -23.04a | -19.2a |
| Total expenses | -476.23a | -437.53a | -391.42a |
| Operating income | 340.87a | 315.02a | 326.88a |
| Other income (expense) | — | — | — |
| Interest income | 26.05a | 22.43a | 5.04a |
| Interest expense | -1.6a | -1.98a | -0.7a |
| Equity in earnings of unconsolidated affiliate | 1.4a | 0.74a | 1.13a |
| Other, net | -6.16a | -3.5a | 5.95a |
| Total other income (expense) | 19.68a | 17.68a | 11.41a |
| Income before income taxes | 360.55a | 332.7a | 338.29a |
| Provision for income taxes | -86.37a | -74.65a | -88.06a |
| Net income | 274.18a | 258.06a | 250.22a |