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v3.25.3

Segment and Geographic Information - Schedule of Segment Certain Revenues and Significant Expense Categories (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | $ 130,643.9 | $ 98,491.0 | $ 59,868.5
Interest income | 1,734.3 | 1,396.8 | 987.6
Total revenues | 132,378.2 | 99,887.8 | 60,856.1
Cost of sales of physical commodities | 128,251.3 | 96,451.6 | 57,942.0
Operating revenues | 4,126.9 | 3,436.2 | 2,914.1
Transaction-based clearing expenses | 382.2 | 319.3 | 271.8
Introducing broker commissions | 211.4 | 166.2 | 161.6
Total interest expense | 1,480.5 | 1,183.5 | 859.7
Net operating revenues | 2,052.8 | 1,767.2 | 1,621.0
Variable compensation and benefits | 607.1 | 506.5 | 483.2
Net contribution | 1,445.7 | 1,260.7 | 1,137.8
Fixed compensation and benefits | 500.6 | 435.9 | 385.4
Trading systems and market information | 83.1 | 79.1 | 74.0
Professional fees | 86.3 | 69.7 | 57.0
Non-trading technology and support | 87.3 | 73.4 | 61.6
Selling and marketing | 50.5 | 52.6 | 54.0
Travel and business development | 33.0 | 28.4 | 24.8
Depreciation and amortization | 67.5 | 53.1 | 51.0
Bad debts, net of recoveries | 3.1 | 0.6 | 16.5
Shared services | 0.0 | 0.0 | 0.0
Other fixed expenses | 131.0 | 122.6 | 115.9
Non-variable expenses | 1,042.4 | 915.4 | 840.2
Other gains (losses), net | 5.5 | 8.8 | 25.4
Income before tax | 408.8 | 354.1 | 323.0
Total assets | 45,268.0 | 27,466.3 | 21,938.7
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | 22.2 | 5.5 | 6.1
Interest income | 42.2 | 41.4 | 25.6
Total revenues | 64.4 | 46.9 | 31.7
Cost of sales of physical commodities | 0.0 | 0.0 | 0.0
Operating revenues | 64.4 | 46.9 | 31.7
Transaction-based clearing expenses | 5.8 | 2.9 | 2.3
Introducing broker commissions | 0.0 | 0.0 | 0.0
Total interest expense | 115.2 | 108.7 | 92.3
Net operating revenues | (56.6) | (64.7) | (62.9)
Variable compensation and benefits | 83.1 | 76.2 | 72.9
Net contribution | (139.7) | (140.9) | (135.8)
Fixed compensation and benefits | 276.1 | 217.1 | 180.5
Trading systems and market information | 17.0 | 19.3 | 18.1
Professional fees | 47.9 | 31.9 | 26.4
Non-trading technology and support | 71.0 | 56.7 | 43.8
Selling and marketing | 7.4 | 7.9 | 4.4
Travel and business development | 12.1 | 9.0 | 6.0
Depreciation and amortization | 29.5 | 24.2 | 22.7
Bad debts, net of recoveries | 0.0 | 0.0 | 0.0
Shared services | (66.8) | (58.0) | (52.2)
Other fixed expenses | 85.0 | 82.5 | 78.3
Non-variable expenses | 479.2 | 390.6 | 328.0
Other gains (losses), net | 0.0 | 0.0 | 23.3
Income before tax | (618.9) | (531.5) | (440.5)
Total assets | 997.5 | 1,123.5 | 812.3
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | (3.2) | (2.5) | (2.1)
Interest income | (58.0) | (46.8) | (37.4)
Total revenues | (61.2) | (49.3) | (39.5)
Cost of sales of physical commodities | 0.0 | 0.0 | 0.0
Operating revenues | (61.2) | (49.3) | (39.5)
Transaction-based clearing expenses | (3.2) | (2.5) | (2.1)
Introducing broker commissions | 0.0 | 0.0 | 0.0
Total interest expense | (58.0) | (46.8) | (37.4)
Net operating revenues | 0.0 | 0.0 | 0.0
Variable compensation and benefits | 0.0 | 0.0 | 0.0
Net contribution | 0.0 | 0.0 | 0.0
Fixed compensation and benefits | 0.0 | 0.0 | 0.0
Trading systems and market information | 0.0 | 0.0 | 0.0
Professional fees | 0.0 | 0.0 | 0.0
Non-trading technology and support | 0.0 | 0.0 | 0.0
Selling and marketing | 0.0 | 0.0 | 0.0
Travel and business development | 0.0 | 0.0 | 0.0
Depreciation and amortization | 0.0 | 0.0 | 0.0
Bad debts, net of recoveries | 0.0 | 0.0 | 0.0
Shared services | 0.0 | 0.0 | 0.0
Other fixed expenses | 0.0 | 0.0 | 0.0
Non-variable expenses | 0.0 | 0.0 | 0.0
Other gains (losses), net | 0.0 | 0.0 | 0.0
Income before tax | 0.0 | 0.0 | 0.0
Total assets | 0.0 | 0.0 | 0.0
Commercial | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | 129,048.4 | 97,146.8 | 58,662.2
Interest income | 208.8 | 182.1 | 154.5
Total revenues | 129,257.2 | 97,328.9 | 58,816.7
Cost of sales of physical commodities | 128,251.3 | 96,451.6 | 57,942.0
Operating revenues | 1,005.9 | 877.3 | 874.7
Transaction-based clearing expenses | 83.2 | 70.3 | 60.7
Introducing broker commissions | 70.6 | 44.3 | 40.2
Total interest expense | 83.4 | 41.8 | 41.0
Net operating revenues | 768.7 | 720.9 | 732.8
Variable compensation and benefits | 192.9 | 174.5 | 177.2
Net contribution | 575.8 | 546.4 | 555.6
Fixed compensation and benefits | 77.6 | 68.9 | 61.4
Trading systems and market information | 17.3 | 15.7 | 13.9
Professional fees | 8.0 | 7.6 | 6.2
Non-trading technology and support | 2.0 | 1.8 | 3.1
Selling and marketing | 5.0 | 5.5 | 4.9
Travel and business development | 9.2 | 8.3 | 7.1
Depreciation and amortization | 10.3 | 6.2 | 4.3
Bad debts, net of recoveries | 1.6 | 0.2 | 15.7
Shared services | 32.2 | 28.7 | 24.0
Other fixed expenses | 18.1 | 19.2 | 14.8
Non-variable expenses | 181.3 | 162.1 | 155.4
Other gains (losses), net | 1.0 | 6.9 | 0.0
Income before tax | 395.5 | 391.2 | 400.2
Total assets | 9,826.3 | 5,383.9 | 4,707.2
Institutional | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | 991.1 | 782.1 | 700.9
Interest income | 1,507.4 | 1,180.0 | 812.7
Total revenues | 2,498.5 | 1,962.1 | 1,513.6
Cost of sales of physical commodities | 0.0 | 0.0 | 0.0
Operating revenues | 2,498.5 | 1,962.1 | 1,513.6
Transaction-based clearing expenses | 275.7 | 228.0 | 187.9
Introducing broker commissions | 33.6 | 31.2 | 35.4
Total interest expense | 1,332.3 | 1,072.5 | 758.3
Net operating revenues | 856.9 | 630.4 | 532.0
Variable compensation and benefits | 281.5 | 200.1 | 180.5
Net contribution | 575.4 | 430.3 | 351.5
Fixed compensation and benefits | 87.5 | 77.1 | 59.7
Trading systems and market information | 34.6 | 30.0 | 27.7
Professional fees | 15.7 | 20.1 | 13.3
Non-trading technology and support | 3.9 | 3.3 | 5.1
Selling and marketing | 3.4 | 3.5 | 2.3
Travel and business development | 8.7 | 7.5 | 6.5
Depreciation and amortization | 7.2 | 3.9 | 3.5
Bad debts, net of recoveries | 0.0 | (1.3) | (1.5)
Shared services | 16.1 | 13.6 | 10.5
Other fixed expenses | 11.8 | 6.6 | 8.6
Non-variable expenses | 188.9 | 164.3 | 135.7
Other gains (losses), net | (0.7) | 0.0 | 2.1
Income before tax | 385.8 | 266.0 | 217.9
Total assets | 32,465.5 | 19,492.9 | 15,059.3
Self-Directed/Retail | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | 373.2 | 351.8 | 290.5
Interest income | 32.3 | 37.8 | 30.5
Total revenues | 405.5 | 389.6 | 321.0
Cost of sales of physical commodities | 0.0 | 0.0 | 0.0
Operating revenues | 405.5 | 389.6 | 321.0
Transaction-based clearing expenses | 13.3 | 13.6 | 16.2
Introducing broker commissions | 103.0 | 87.8 | 83.7
Total interest expense | 7.6 | 7.1 | 5.3
Net operating revenues | 281.6 | 281.1 | 215.8
Variable compensation and benefits | 15.1 | 18.7 | 13.8
Net contribution | 266.5 | 262.4 | 202.0
Fixed compensation and benefits | 33.5 | 44.2 | 47.2
Trading systems and market information | 13.1 | 12.7 | 13.0
Professional fees | 11.5 | 9.1 | 9.9
Non-trading technology and support | 8.6 | 9.8 | 7.9
Selling and marketing | 34.2 | 35.2 | 41.3
Travel and business development | 1.9 | 2.5 | 3.4
Depreciation and amortization | 15.8 | 15.5 | 19.7
Bad debts, net of recoveries | 1.5 | 0.5 | 2.3
Shared services | 9.7 | 7.9 | 10.6
Other fixed expenses | 12.6 | 11.1 | 10.4
Non-variable expenses | 142.4 | 148.5 | 165.7
Other gains (losses), net | 5.5 | 1.9 | 0.0
Income before tax | 129.6 | 115.8 | 36.3
Total assets | 1,256.2 | 1,027.2 | 983.3
Payments | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Non-interest revenues | 212.2 | 207.3 | 210.9
Interest income | 1.6 | 2.3 | 1.7
Total revenues | 213.8 | 209.6 | 212.6
Cost of sales of physical commodities | 0.0 | 0.0 | 0.0
Operating revenues | 213.8 | 209.6 | 212.6
Transaction-based clearing expenses | 7.4 | 7.0 | 6.8
Introducing broker commissions | 4.2 | 2.9 | 2.3
Total interest expense | 0.0 | 0.2 | 0.2
Net operating revenues | 202.2 | 199.5 | 203.3
Variable compensation and benefits | 34.5 | 37.0 | 38.8
Net contribution | 167.7 | 162.5 | 164.5
Fixed compensation and benefits | 25.9 | 28.6 | 36.6
Trading systems and market information | 1.1 | 1.4 | 1.3
Professional fees | 3.2 | 1.0 | 1.2
Non-trading technology and support | 1.8 | 1.8 | 1.7
Selling and marketing | 0.5 | 0.5 | 1.1
Travel and business development | 1.1 | 1.1 | 1.8
Depreciation and amortization | 4.7 | 3.3 | 0.8
Bad debts, net of recoveries | 0.0 | 1.2 | 0.0
Shared services | 8.8 | 7.8 | 7.1
Other fixed expenses | 3.5 | 3.2 | 3.8
Non-variable expenses | 50.6 | 49.9 | 55.4
Other gains (losses), net | (0.3) | 0.0 | 0.0
Income before tax | 116.8 | 112.6 | 109.1
Total assets | $ 722.5 | $ 438.8 | $ 376.6

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