v3.25.3
Segment Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting Information [Line Items]        
Total revenue $ 144.2 $ 123.1 $ 391.5 $ 337.8
Segment economic net income 26.6 27.0 74.7 70.5
Unallocated corporate expenses (4.2) (4.9) (13.5) (14.3)
Adjustments and reconciling items 2.9 1.0 5.5 1.1
Non-cash compensation expenses for Acadian LLC key employee equity and profit interest revaluations (16.3) (9.3) (35.7) (19.6)
Investment income (loss) 0.0 1.5 0.1 2.5
Interest income 0.9 0.6 2.8 2.8
Interest expense (4.6) (4.7) (14.7) (15.0)
Income before income taxes 34.4 28.4 90.1 67.3
Income tax expense (7.4) (9.4) (20.2) (21.1)
Consolidated net income 27.0 19.0 69.9 46.2
Net income attributable to redeemable non-controlling interests in consolidated Funds (11.9) (2.1) (24.6) (3.7)
Net income attributable to controlling interests 15.1 16.9 45.3 42.5
Hold Co        
Segment Reporting Information [Line Items]        
Fixed compensation and benefits 2.7 2.4 7.7 7.2
General and administrative expense 1.5 2.5 5.8 7.1
Consolidated Funds        
Segment Reporting Information [Line Items]        
Total revenue 7.9 0.9 12.1 2.0
Net consolidated Funds' investment gains 11.5 4.0 27.2 6.5
Net income attributable to redeemable non-controlling interests in consolidated Funds (11.9) (2.1) (24.6) (3.7)
Consolidated Entity Excluding Consolidated Funds        
Segment Reporting Information [Line Items]        
Fixed compensation and benefits 84.7 69.6 229.3 189.9
Depreciation and amortization 4.1 4.5 12.5 14.1
Investment income (loss) 0.0 1.5 0.1 2.5
Interest income 0.9 0.6 2.8 2.8
Interest expense (4.6) (4.7) (14.7) (15.0)
Consolidated net income     69.9 46.2
Quant And Solutions        
Segment Reporting Information [Line Items]        
Fixed compensation and benefits 26.4 22.7 72.7 66.9
Variable compensation 31.1 29.0 91.3 81.8
Acadian LLC key employee distributions 5.2 3.1 12.3 7.4
Depreciation and amortization 4.1 4.5 12.5 13.7
Other segment items 25.3 22.7 72.2 62.7
Segment economic net income 44.2 40.2 118.4 103.3
Income before income taxes 34.4 28.4 90.1 67.3
Income tax expense (7.4) (9.4) (20.2) (21.1)
Consolidated net income 27.0 19.0 69.9 46.2
Net income attributable to redeemable non-controlling interests in consolidated Funds (11.9) (2.1) (24.6) (3.7)
Net income attributable to controlling interests 15.1 16.9 45.3 42.5
Quant And Solutions | Consolidated Entity Excluding Consolidated Funds        
Segment Reporting Information [Line Items]        
Total revenue $ 136.3 $ 122.2 $ 379.4 $ 335.8