| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Transaction-based and trade execution fees | -- | -- | -- | -- | -- | -- | -- | -- | 24.02 | 29.02 |
| Asset management, administration and distribution fees | 1,817.08 | 1,677.14 | 1,514.82 | 1,514.06 | 1,547.02 | 1,345.65 | 1,307.04 | 1,270.18 | 1,180.79 | 1,072.18 |
| Information processing and software servicing fees | 480.30 | 448.01 | 404.98 | 476.97 | 371.29 | 338.41 | 342.84 | 353.99 | 321.74 | 300.35 |
| Total Revenues | 2,297.38 | 2,125.15 | 1,919.79 | 1,991.04 | 1,918.31 | 1,684.06 | 1,649.89 | 1,624.17 | 1,526.55 | 1,401.55 |
| Commissions and fees | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Brokerage commissions and royalties | -- | -- | -- | -- | -- | -- | -- | -- | 17.85 | 22.15 |
| Depreciation | 30.43 | 33.36 | 35.30 | 33.66 | 33.48 | 30.96 | 29.44 | 28.79 | 27.31 | 26.44 |
| Depreciation and amortization | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Amortization | 46.64 | 41.87 | 38.67 | 54.28 | 59.15 | 52.98 | 51.42 | 48.90 | 48.28 | 45.39 |
| Data processing and computer related | 165.53 | 151.65 | 137.04 | 125.17 | 107.56 | 96.33 | 88.06 | 84.79 | 71.91 | 64.93 |
| Consulting, outsourcing and professional fees | 218.32 | 211.81 | 231.47 | 242.01 | 223.20 | 227.92 | 194.56 | 200.86 | 186.36 | 166.77 |
| Compensation, benefits and other personnel | 821.45 | 770.88 | 714.10 | 720.03 | 584.50 | 527.51 | 517.92 | 511.26 | 458.74 | 414.62 |
| Facilities, supplies and other costs | 87.20 | 79.28 | 85.84 | 74.99 | 69.76 | 64.92 | 72.08 | 70.84 | 72.35 | 68.25 |
| Stock-based compensation | 53.56 | 58.63 | 31.31 | 39.40 | 41.45 | 27.01 | 24.58 | 23.81 | 36.37 | 16.02 |
| General and administrative | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sales and marketing | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Operating and development | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Subadvisory, distribution and other asset management costs | (209.22) | (191.71) | (189.26) | (196.73) | (218.07) | (181.62) | (181.42) | (180.49) | (179.18) | (170.96) |
| Software royalties and other information processing costs | (37.72) | (34.23) | (32.29) | (29.01) | (27.76) | (28.94) | (29.99) | (32.45) | (31.28) | (30.32) |
| Total Operating Expenses | 1,670.07 | 1,573.41 | 1,495.27 | 1,515.28 | 1,364.93 | 1,238.17 | 1,189.46 | 1,182.18 | 1,129.61 | 1,025.85 |
| Income from operations | 627.31 | 551.74 | 424.52 | 475.75 | 553.38 | 445.89 | 460.42 | 441.99 | 396.94 | 375.69 |
| Interest Expense | 0.61 | 0.56 | 0.58 | 0.75 | 0.56 | 0.61 | 0.63 | 0.65 | 0.78 | 0.53 |
| Net gain (loss) from investments | 5.80 | 2.79 | 2.76 | (3.08) | (0.37) | (0.29) | 3.17 | (0.33) | 1.27 | 0.11 |
| Gain on sale of subsidiary | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2.79 |
| Equity in the earnings of unconsolidated affiliate | 132.69 | 135.74 | 126.93 | 120.67 | 137.57 | 117.13 | 151.89 | 159.79 | 152.55 | 126.10 |
| Interest and dividend income | 39.92 | 48.90 | 41.03 | 13.31 | 3.65 | 6.57 | 16.58 | 13.40 | 7.06 | 4.32 |
| Net gain from consolidated variable interest entities | 7.13 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority interest | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income | 9.68 | 8.15 | -- | 3.38 | -- | -- | -- | -- | -- | -- |
| Gain on sale ofbusiness | 94.41 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income before income taxes | 916.33 | 746.76 | 594.66 | 609.28 | 693.67 | 568.69 | 631.44 | 614.21 | 557.04 | 508.49 |
| Current: Federal | -- | -- | -- | -- | -- | 92.65 | 100.99 | 82.49 | 154.78 | 158.41 |
| Current: State | -- | -- | -- | -- | -- | 21.48 | 19.90 | 13.71 | 11.65 | 10.50 |
| Current: Foreign | -- | -- | -- | -- | -- | 8.26 | 11.72 | 8.41 | 8.00 | 5.14 |
| Income taxes | 198.78 | 165.57 | 132.40 | 133.81 | 147.08 | 121.41 | 130.02 | 108.34 | 152.65 | 174.67 |
| Deferred, including current deferred: Federal | -- | -- | -- | -- | -- | (0.70) | (1.64) | 2.55 | (26.35) | 0.79 |
| Deferred, including current deferred: State | -- | -- | -- | -- | -- | (0.28) | (0.96) | 1.17 | 1.38 | (0.17) |
| Income taxes attributable to the Noncontrolling interest (1) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred, including current deferred: Foreign | -- | -- | -- | -- | -- | -- | -- | 0.02 | 3.20 | -- |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income | 717.55 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income (loss) Before Preferred Dividend & Other Adjustments | -- | -- | -- | -- | -- | 447.29 | -- | -- | -- | -- |
| Less : Net income attributable to the noncontrolling interest | 2.25 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (Loss) Available to Common Shareholders | 715.31 | 581.19 | 462.26 | 475.47 | 546.59 | 447.29 | 501.43 | 505.87 | 404.39 | 333.82 |
| Earnings per common share from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Basic) | 5.76 | 4.47 | 3.49 | 3.49 | 3.87 | 3.05 | 3.31 | 3.23 | 2.56 | 2.07 |
| Earnings per common share from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Diluted) | 5.63 | 4.41 | 3.46 | 3.46 | 3.81 | 3.00 | 3.24 | 3.14 | 2.49 | 2.03 |
| Weighted Average Shares Outstanding (Basic) | 124.08 | 130.07 | 132.59 | 136.07 | 141.22 | 146.71 | 151.54 | 156.58 | 158.18 | 161.35 |
| Weighted Average Shares Outstanding (Diluted) | 127.08 | 131.73 | 133.73 | 137.42 | 143.31 | 149.00 | 154.90 | 161.23 | 162.27 | 164.43 |