v3.26.3
Segment reporting - Operating Segment Results (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]        
Gross written premium $ 994.9 $ 874.4 $ 2,976.0 $ 2,807.3
Net written premium 680.4 670.3 2,085.9 2,117.7
Net earned premium 767.6 647.7 2,046.8 1,926.4
Loss and loss adjustment expenses incurred, net 415.9 372.9 1,137.0 1,147.3
Acquisition costs, net 195.2 139.8 499.8 410.4
Other underwriting expenses 53.0 43.6 155.3 133.0
Underwriting income (loss) 103.5 91.4 254.7 235.7
Services revenues 30.8 35.5 119.1 92.5
Services expenses 75.7 62.5 220.6 194.0
Net (income) loss attributable to noncontrolling interests (0.2) 0.1 (0.2) (0.4)
Net income available to SiriusPoint 86.8 90.8 257.6 215.6
Segment income (loss) 103.5 91.4 254.7 235.7
Net investment income 65.9 66.5 197.8 205.9
Net investment gains (losses) 3.3 6.2 22.6 6.6
Net corporate and other expenses (75.7) (62.5) (220.6) (194.0)
Intangible asset amortization (2.5) (2.8) (7.5) (8.5)
Interest expense (18.4) (21.0) (53.9) (60.2)
Foreign exchange losses (3.2) (2.4) (2.7) (16.9)
Income before income tax expense 103.7 110.9 309.5 261.1
Income tax expense (16.7) (20.2) (51.7) (45.1)
Net income (loss) 87.0 90.7 257.8 216.0
Attritional losses 435.7 381.8 1,183.0 1,131.7
Catastrophe losses 0.0 0.0 6.7 67.4
Prior year loss reserve development (19.8) (8.9) (52.7) (51.8)
Total incurred loss and loss adjustment expenses $ 415.9 $ 372.9 $ 1,137.0 $ 1,147.3
Underwriting Ratios:        
Attritional loss ratio 0.568 0.590 0.579 0.588
Catastrophe loss ratio 0 0 0.003 0.035
Prior year loss development ratio (0.026) (0.014) (0.026) (0.027)
Loss ratio 54.20% 57.60% 55.60% 59.60%
Acquisition cost ratio 25.40% 21.60% 24.40% 21.30%
Other underwriting expenses ratio 6.90% 6.70% 7.60% 6.90%
Combined ratio 86.50% 85.90% 87.60% 87.80%
Operating Segments        
Segment Reporting [Line Items]        
Gross written premium $ 990.6 $ 871.6 $ 2,975.9 $ 2,791.6
Net written premium 678.7 664.9 2,085.0 2,116.7
Net earned premium 764.8 643.5 2,041.9 1,914.9
Loss and loss adjustment expenses incurred, net 417.6 370.8 1,123.9 1,141.6
Acquisition costs, net 223.1 163.0 574.8 485.8
Other underwriting expenses 48.2 40.1 141.4 121.8
Underwriting income (loss) 75.9 69.6 201.8 165.7
Net (income) loss attributable to noncontrolling interests 0.0 0.0 0.0 0.0
Net income available to SiriusPoint 87.8 79.7 232.0 203.4
Segment income (loss) 87.8 79.7 232.0 203.4
Income before income tax expense 87.8 79.7 232.0 203.4
Income tax expense 0.0 0.0 0.0 0.0
Net income (loss) 87.8 79.7 232.0 203.4
Attritional losses 435.9 379.9 1,184.4 1,131.4
Catastrophe losses 0.0 0.0 6.7 67.4
Prior year loss reserve development (18.3) (9.1) (67.2) (57.2)
Total incurred loss and loss adjustment expenses $ 417.6 $ 370.8 $ 1,123.9 $ 1,141.6
Underwriting Ratios:        
Attritional loss ratio 0.570 0.590 0.580 0.591
Catastrophe loss ratio 0 0 0.003 0.035
Prior year loss development ratio (0.024) (0.014) (0.033) (0.030)
Loss ratio 54.60% 57.60% 55.00% 59.60%
Acquisition cost ratio 29.20% 25.30% 28.20% 25.40%
Other underwriting expenses ratio 6.30% 6.20% 6.90% 6.40%
Combined ratio 90.10% 89.10% 90.10% 91.40%
Operating Segments | Services        
Segment Reporting [Line Items]        
Services revenues $ 61.5 $ 58.5 $ 174.9 $ 178.7
Services expenses 49.4 48.5 145.1 141.2
Net services fee income 12.1 10.0 29.8 37.5
Net (income) loss attributable to noncontrolling interests (0.2) 0.1 0.4 0.2
Net income available to SiriusPoint 11.9 10.1 30.2 37.7
Net corporate and other expenses (49.4) (48.5) (145.1) (141.2)
Operating Segments | Insurance & Services        
Segment Reporting [Line Items]        
Gross written premium 673.0 562.0 2,002.2 1,757.5
Net written premium 403.5 396.8 1,287.0 1,273.1
Net earned premium 460.8 381.2 1,222.6 1,086.6
Loss and loss adjustment expenses incurred, net 263.6 225.3 695.8 644.4
Acquisition costs, net 136.9 98.3 349.1 283.5
Other underwriting expenses 27.3 19.9 79.2 61.4
Underwriting income (loss) 33.0 37.7 98.5 97.3
Segment income (loss) 44.9 47.8 128.7 135.0
Income before income tax expense 44.9 47.8 128.7 135.0
Attritional losses 272.7 234.8 734.8 661.3
Catastrophe losses 0.0 0.0 1.3 4.8
Prior year loss reserve development (9.1) (9.5) (40.3) (21.7)
Total incurred loss and loss adjustment expenses $ 263.6 $ 225.3 $ 695.8 $ 644.4
Underwriting Ratios:        
Attritional loss ratio 0.592 0.616 0.601 0.609
Catastrophe loss ratio 0 0 0.001 0.004
Prior year loss development ratio (0.020) (0.025) (0.033) (0.020)
Loss ratio 57.20% 59.10% 56.90% 59.30%
Acquisition cost ratio 29.70% 25.80% 28.60% 26.10%
Other underwriting expenses ratio 5.90% 5.20% 6.50% 5.70%
Combined ratio 92.80% 90.10% 92.00% 91.10%
Operating Segments | Insurance & Services | Services        
Segment Reporting [Line Items]        
Services revenues $ 61.5 $ 58.5 $ 174.9 $ 178.7
Services expenses 49.4 48.5 145.1 141.2
Net services fee income 12.1 10.0 29.8 37.5
Net (income) loss attributable to noncontrolling interests (0.2) 0.1 0.4 0.2
Net income available to SiriusPoint 11.9 10.1 30.2 37.7
Net corporate and other expenses (49.4) (48.5) (145.1) (141.2)
Operating Segments | Reinsurance        
Segment Reporting [Line Items]        
Gross written premium 317.6 309.6 973.7 1,034.1
Net written premium 275.2 268.1 798.0 843.6
Net earned premium 304.0 262.3 819.3 828.3
Loss and loss adjustment expenses incurred, net 154.0 145.5 428.1 497.2
Acquisition costs, net 86.2 64.7 225.7 202.3
Other underwriting expenses 20.9 20.2 62.2 60.4
Underwriting income (loss) 42.9 31.9 103.3 68.4
Segment income (loss) 42.9 31.9 103.3 68.4
Income before income tax expense 42.9 31.9 103.3 68.4
Attritional losses 163.2 145.1 449.6 470.1
Catastrophe losses 0.0 0.0 5.4 62.6
Prior year loss reserve development (9.2) 0.4 (26.9) (35.5)
Total incurred loss and loss adjustment expenses $ 154.0 $ 145.5 $ 428.1 $ 497.2
Underwriting Ratios:        
Attritional loss ratio 0.537 0.553 0.549 0.567
Catastrophe loss ratio 0 0 0.007 0.076
Prior year loss development ratio (0.030) 0.002 (0.033) (0.043)
Loss ratio 50.70% 55.50% 52.30% 60.00%
Acquisition cost ratio 28.40% 24.70% 27.50% 24.40%
Other underwriting expenses ratio 6.90% 7.70% 7.60% 7.30%
Combined ratio 86.00% 87.90% 87.40% 91.70%
Operating Segments | Reinsurance | Services        
Segment Reporting [Line Items]        
Services revenues $ 0.0 $ 0.0 $ 0.0 $ 0.0
Services expenses 0.0 0.0 0.0 0.0
Net services fee income 0.0 0.0 0.0 0.0
Net (income) loss attributable to noncontrolling interests 0.0 0.0 0.0 0.0
Net income available to SiriusPoint 0.0 0.0 0.0 0.0
Net corporate and other expenses 0.0 0.0 0.0 0.0
Eliminations        
Segment Reporting [Line Items]        
Gross written premium 0.0 0.0 0.0 0.0
Net written premium 0.0 0.0 0.0 0.0
Net earned premium 0.0 0.0 0.0 0.0
Loss and loss adjustment expenses incurred, net (2.1) (1.5) (5.7) (5.0)
Acquisition costs, net (28.7) (26.9) (73.2) (83.1)
Other underwriting expenses 0.0 0.0 0.0 0.0
Underwriting income (loss) 30.8 28.4 78.9 88.1
Net (income) loss attributable to noncontrolling interests 0.0 0.0 0.0 0.0
Net income available to SiriusPoint (0.4) (4.3) (5.2) (6.5)
Segment income (loss) (0.4) (4.3) (5.2) (6.5)
Income before income tax expense (0.4) (4.3) (5.2) (6.5)
Income tax expense 0.0 0.0 0.0 0.0
Net income (loss) (0.4) (4.3) (5.2) (6.5)
Attritional losses (2.1) (1.5) (5.7) (5.0)
Catastrophe losses 0.0 0.0 0.0 0.0
Prior year loss reserve development 0.0 0.0 0.0 0.0
Total incurred loss and loss adjustment expenses (2.1) (1.5) (5.7) (5.0)
Eliminations | Services        
Segment Reporting [Line Items]        
Services revenues (31.2) (32.7) (84.1) (94.6)
Services expenses 0.0 0.0 0.0 0.0
Net services fee income (31.2) (32.7) (84.1) (94.6)
Net (income) loss attributable to noncontrolling interests 0.0 0.0 0.0 0.0
Net income available to SiriusPoint (31.2) (32.7) (84.1) (94.6)
Net corporate and other expenses 0.0 0.0 0.0 0.0
Corporate        
Segment Reporting [Line Items]        
Gross written premium 4.3 2.8 0.1 15.7
Net written premium 1.7 5.4 0.9 1.0
Net earned premium 2.8 4.2 4.9 11.5
Loss and loss adjustment expenses incurred, net 0.4 3.6 18.8 10.7
Acquisition costs, net 0.8 3.7 (1.8) 7.7
Other underwriting expenses 4.8 3.5 13.9 11.2
Underwriting income (loss) (3.2) (6.6) (26.0) (18.1)
Services revenues 0.5 9.7 28.3 8.4
Services expenses 26.3 14.0 75.5 52.8
Net (income) loss attributable to noncontrolling interests 0.0 0.0 (0.6) (0.6)
Net income available to SiriusPoint (0.6) 15.4 30.8 18.7
Segment income (loss) (3.2) (6.6) (26.0) (18.1)
Net investment income 65.9 66.5 197.8 205.9
Net investment gains (losses) 3.3 6.2 22.6 6.6
Net corporate and other expenses (26.3) (14.0) (75.5) (52.8)
Intangible asset amortization (2.5) (2.8) (7.5) (8.5)
Interest expense (18.4) (21.0) (53.9) (60.2)
Foreign exchange losses (3.2) (2.4) (2.7) (16.9)
Income before income tax expense 16.1 35.6 83.1 64.4
Income tax expense (16.7) (20.2) (51.7) (45.1)
Net income (loss) (0.6) 15.4 31.4 19.3
Attritional losses 1.9 3.4 4.3 5.3
Prior year loss reserve development (1.5) 0.2 14.5 5.4
Total incurred loss and loss adjustment expenses 0.4 3.6 18.8 10.7
Segment Measure Reclass        
Segment Reporting [Line Items]        
Loss and loss adjustment expenses incurred, net 0.0      
Services revenues 30.3 25.8 90.8 84.1
Services expenses 49.4 48.5 145.1 141.2
Net (income) loss attributable to noncontrolling interests (0.2) 0.1 0.4 0.2
Net income available to SiriusPoint 0.0 0.0 0.0 0.0
Segment income (loss) 19.3 22.6 53.9 56.9
Net investment gains (losses) 0.0 0.0 0.0 0.0
Net corporate and other expenses (49.4) (48.5) (145.1) (141.2)
Income before income tax expense 0.2 (0.1) (0.4) (0.2)
Income tax expense 0.0 0.0 0.0 0.0
Net income (loss) 0.2 (0.1) (0.4) (0.2)
Attritional losses 0.0      
Total incurred loss and loss adjustment expenses 0.0      
Segment Measure Reclass | Services        
Segment Reporting [Line Items]        
Services revenues (30.3) (25.8) (90.8) (84.1)
Services expenses (49.4) (48.5) (145.1) (141.2)
Net services fee income 19.1 22.7 54.3 57.1
Net (income) loss attributable to noncontrolling interests 0.2 (0.1) (0.4) (0.2)
Net income available to SiriusPoint 19.3 22.6 53.9 56.9
Net corporate and other expenses $ 49.4 $ 48.5 $ 145.1 $ 141.2