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Segment reporting - Operating Segment Results (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($)
Segment Reporting Information [Line Items] |  |
Gross premiums written | $ 984.7 | $ 906.6
Net premiums written | 743.0 | 639.3
Net premiums earned | 626.7 | 593.8
Loss and loss adjustment expenses incurred, net | 401.8 | 317.5
Acquisition costs, net | 129.7 | 144.9
Other underwriting expenses | 41.1 | 41.8
Underwriting income (loss) | 54.1 | 89.6
Services revenues | 29.7 | 27.8
Services expenses | 60.6 | 56.0
Noncontrolling income (loss) | (0.4) | (1.1)
Net income available to SiriusPoint | 61.6 | 94.8
Segment income (loss) | 54.1 | 89.6
Net investment income | 71.2 | 78.8
Net realized and unrealized investment (losses) gains | (0.3) | 1.0
Loss on settlement and change in fair value of liability-classified capital instruments | 0.0 | (15.9)
Net corporate and other expenses | (60.6) | (56.0)
Intangible asset amortization | (2.9) | (2.9)
Interest expense | (18.1) | (20.5)
Foreign exchange gains | 2.2 | 3.7
Income before income tax expense | 75.3 | 105.6
Income tax (expense) benefit | (13.3) | (9.7)
Net income | 62.0 | 95.9
Attritional losses | 368.1 | 356.4
Catastrophe losses | 67.9 |
Prior year loss reserve development | (34.2) | (38.9)
Loss and loss adjustment expenses incurred, net | $ 401.8 | $ 317.5
Underwriting Ratios: |  |
Attritional loss ratio | 0.588 | 0.600
Catastrophe loss ratio | 0.108 |
Prior year loss development ratio | (0.055) | (0.065)
Loss ratio | 64.10% | 53.50%
Acquisition cost ratio | 20.70% | 24.40%
Other underwriting expenses ratio | 6.60% | 7.00%
Combined ratio | 91.40% | 84.90%
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | $ 989.9 | $ 880.7
Net premiums written | 752.0 | 627.2
Net premiums earned | 625.8 | 517.8
Loss and loss adjustment expenses incurred, net | 405.2 | 301.1
Acquisition costs, net | 154.4 | 135.0
Other underwriting expenses | 37.7 | 37.4
Underwriting income (loss) | 28.5 | 44.3
Noncontrolling income (loss) | 0.0 | 0.0
Net income available to SiriusPoint | 47.4 | 62.4
Segment income (loss) | 47.4 | 62.4
Income before income tax expense | 47.4 | 62.4
Income tax (expense) benefit | 0.0 | 0.0
Net income | 47.4 | 62.4
Attritional losses | 371.6 | 309.1
Catastrophe losses | 67.9 |
Prior year loss reserve development | (34.3) | (8.0)
Loss and loss adjustment expenses incurred, net | $ 405.2 | $ 301.1
Underwriting Ratios: |  |
Attritional loss ratio | 0.593 | 0.597
Catastrophe loss ratio | 0.109 |
Prior year loss development ratio | (0.055) | (0.016)
Loss ratio | 64.70% | 58.10%
Acquisition cost ratio | 24.70% | 26.10%
Other underwriting expenses ratio | 6.00% | 7.20%
Combined ratio | 95.40% | 91.40%
Operating Segments | Services |  |
Segment Reporting Information [Line Items] |  |
Services revenues | $ 62.1 | $ 65.8
Services expenses | 43.1 | 46.0
Net services fee income | 19.0 | 19.8
Noncontrolling income (loss) | (0.1) | (1.7)
Net income available to SiriusPoint | 18.9 | 18.1
Net corporate and other expenses | (43.1) | (46.0)
Eliminations |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | 0.0 | 0.0
Net premiums written | 0.0 | 0.0
Net premiums earned | 0.0 | 0.0
Loss and loss adjustment expenses incurred, net | (2.0) | (1.4)
Acquisition costs, net | (28.0) | (33.2)
Other underwriting expenses | 0.0 | 0.0
Underwriting income (loss) | 30.0 | 34.6
Noncontrolling income (loss) | 0.0 | 0.0
Net income available to SiriusPoint | (0.2) | (2.5)
Segment income (loss) | (0.2) | (2.5)
Income before income tax expense | (0.2) | (2.5)
Income tax (expense) benefit | 0.0 | 0.0
Net income | (0.2) | (2.5)
Attritional losses | (2.0) | (1.4)
Catastrophe losses | 0.0 |
Prior year loss reserve development | 0.0 | 0.0
Loss and loss adjustment expenses incurred, net | (2.0) | (1.4)
Eliminations | Services |  |
Segment Reporting Information [Line Items] |  |
Services revenues | (30.2) | (37.1)
Services expenses | 0.0 | 0.0
Net services fee income | (30.2) | (37.1)
Noncontrolling income (loss) | 0.0 | 0.0
Net income available to SiriusPoint | (30.2) | (37.1)
Net corporate and other expenses | 0.0 | 0.0
Corporate |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | (5.2) | 25.9
Net premiums written | (9.0) | 12.1
Net premiums earned | 0.9 | 76.0
Loss and loss adjustment expenses incurred, net | (1.4) | 17.8
Acquisition costs, net | 3.3 | 43.1
Other underwriting expenses | 3.4 | 4.4
Underwriting income (loss) | (4.4) | 10.7
Services revenues | (2.2) | (0.9)
Services expenses | 17.5 | 10.0
Noncontrolling income (loss) | (0.3) | 0.6
Net income available to SiriusPoint | 14.4 | 34.9
Segment income (loss) | (4.4) | 10.7
Net investment income | 71.2 | 78.8
Net realized and unrealized investment (losses) gains | (0.3) | 1.0
Loss on settlement and change in fair value of liability-classified capital instruments |  | (15.9)
Net corporate and other expenses | (17.5) | (10.0)
Intangible asset amortization | (2.9) | (2.9)
Interest expense | (18.1) | (20.5)
Foreign exchange gains | 2.2 | 3.7
Income before income tax expense | 28.0 | 44.0
Income tax (expense) benefit | (13.3) | (9.7)
Net income | 14.7 | 34.3
Attritional losses | (1.5) | 48.7
Prior year loss reserve development | 0.1 | (30.9)
Loss and loss adjustment expenses incurred, net | (1.4) | 17.8
Segment Measure Reclass |  |
Segment Reporting Information [Line Items] |  |
Services revenues | 31.9 | 28.7
Services expenses | 43.1 | 46.0
Noncontrolling income (loss) | (0.1) | (1.7)
Net income available to SiriusPoint | 0.0 | 0.0
Segment income (loss) | 11.3 | 19.0
Net realized and unrealized investment (losses) gains | 0.0 | 0.0
Net corporate and other expenses | (43.1) | (46.0)
Income before income tax expense | 0.1 | 1.7
Income tax (expense) benefit | 0.0 | 0.0
Net income | 0.1 | 1.7
Segment Measure Reclass | Services |  |
Segment Reporting Information [Line Items] |  |
Services revenues | (31.9) | (28.7)
Services expenses | (43.1) | (46.0)
Net services fee income | 11.2 | 17.3
Noncontrolling income (loss) | 0.1 | 1.7
Net income available to SiriusPoint | 11.3 | 19.0
Net corporate and other expenses | 43.1 | 46.0
Reinsurance | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | 354.8 | 356.4
Net premiums written | 268.5 | 290.1
Net premiums earned | 289.6 | 253.6
Loss and loss adjustment expenses incurred, net | 195.3 | 124.6
Acquisition costs, net | 67.1 | 69.8
Other underwriting expenses | 18.8 | 19.3
Underwriting income (loss) | 8.4 | 39.9
Segment income (loss) | 8.4 | 39.9
Income before income tax expense | 8.4 | 39.9
Attritional losses | 164.0 | 134.9
Catastrophe losses | 63.1 |
Prior year loss reserve development | (31.8) | (10.3)
Loss and loss adjustment expenses incurred, net | $ 195.3 | $ 124.6
Underwriting Ratios: |  |
Attritional loss ratio | 0.566 | 0.532
Catastrophe loss ratio | 0.218 |
Prior year loss development ratio | (0.110) | (0.041)
Loss ratio | 67.40% | 49.10%
Acquisition cost ratio | 23.20% | 27.50%
Other underwriting expenses ratio | 6.50% | 7.60%
Combined ratio | 97.10% | 84.20%
Reinsurance | Operating Segments | Services |  |
Segment Reporting Information [Line Items] |  |
Services revenues | $ 0.0 | $ 0.0
Services expenses | 0.0 | 0.0
Net services fee income | 0.0 | 0.0
Noncontrolling income (loss) | 0.0 | 0.0
Net income available to SiriusPoint | 0.0 | 0.0
Net corporate and other expenses | 0.0 | 0.0
Insurance & Services | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Gross premiums written | 635.1 | 524.3
Net premiums written | 483.5 | 337.1
Net premiums earned | 336.2 | 264.2
Loss and loss adjustment expenses incurred, net | 209.9 | 176.5
Acquisition costs, net | 87.3 | 65.2
Other underwriting expenses | 18.9 | 18.1
Underwriting income (loss) | 20.1 | 4.4
Segment income (loss) | 39.0 | 22.5
Income before income tax expense | 39.0 | 22.5
Attritional losses | 207.6 | 174.2
Catastrophe losses | 4.8 |
Prior year loss reserve development | (2.5) | 2.3
Loss and loss adjustment expenses incurred, net | $ 209.9 | $ 176.5
Underwriting Ratios: |  |
Attritional loss ratio | 0.617 | 0.659
Catastrophe loss ratio | 0.014 |
Prior year loss development ratio | (0.007) | 0.009
Loss ratio | 62.40% | 66.80%
Acquisition cost ratio | 26.00% | 24.70%
Other underwriting expenses ratio | 5.60% | 6.90%
Combined ratio | 94.00% | 98.40%
Insurance & Services | Operating Segments | Services |  |
Segment Reporting Information [Line Items] |  |
Services revenues | $ 62.1 | $ 65.8
Services expenses | 43.1 | 46.0
Net services fee income | 19.0 | 19.8
Noncontrolling income (loss) | (0.1) | (1.7)
Net income available to SiriusPoint | 18.9 | 18.1
Net corporate and other expenses | $ (43.1) | $ (46.0)

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