Company: AHL
Filing Date: 2025-04-29
Form Type: F-1/A
Source: 0001628280-25-020463
Chunk: 196

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-04-29
Form: F-1/A
Chunk 196
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129.3 |     |        | 52.5 | % |
| Insurance                                         |     |                                        | 1,628.2 |     |       | 3,053.1 |     |         | 4,681.3 |     |        | 65.2 | % |
| Total losses and loss adjustment expense reserves |     | $                                      | 3,115.5 |     | $     | 4,695.1 |     | $       | 7,810.6 |     |        | 60.1 | % |

Prior year loss reserves . For the twelve months ended December 31, 2024, there was an overall increase in our estimate of ultimate net claims to be paid in respect of prior accident years. An analysis of this overall net increase/(decrease) by business segment is as follows for each of the twelve months ended December 31, 2024, 2023 and 2022:

| Business Segment                                          |     | Twelve Months Ended December 31, 
 2024                             
 ($ in millions)                  |      |     | 2023 |       |     | 2022 |       |
|:----------------------------------------------------------|:----|:---------------------------------|-----:|:----|:-----|------:|:----|:-----|------:|
| Reinsurance                                               |     | $                                | 24.4 |     | $    | -14.5 |     | $    | -58.8 |
| Insurance                                                 |     |                                  | 11.2 |     |      |  75.3 |     |      |  86.9 |
| Total losses and loss adjustment expense reserves changes |     | $                                | 35.6 |     | $    |  60.8 |     | $    |  28.1 |

For the twelve months ended December 31, 2024 . The analysis of the development by each segment is as follows:

Reinsurance. Net adverse reserve development of $24.4 million in 2024, due to the unfavorable impact of the LPT of $24.6 million, partially offset by favorable development on post-LPT accident years of $0.2 million.

Insurance. Net adverse reserve development of $11.2 million in 2024, due to adverse prior year development on post-LPT accident years of $0.8 million and the unfavorable movement of $10.4 million due to the impact of