Company: AHL
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001628280-25-023859
Chunk: 194

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-05-08
Form: 424B4
Chunk 194
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.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 the LPT.

For the twelve months ended December 31, 2023 . The analysis of the development by each segment is as follows:

Reinsurance. Net reserve releases of $14.5 million in 2023, due to the favorable impact of the LPT of $20.2 million, partially offset by adverse reserve development on post-LPT accident years of $5.7 million.

Insurance. Net adverse reserve development of $75.3 million in 2023, due to adverse prior year development on post-LPT accident years of $26.6 million and the unfavorable movement of $48.7 million due to the impact of the LPT and retroactive accounting by deferring the gains on the contract over the settlement period.

We did not make any significant changes to the methodologies used in our reserving process between 2023 and 2024.

#### Reinsurance Premiums Payable
Reinsurance Premiums Payable. As at December 31, 2024, we had reinsurance premiums payables totaling $901.1 million compared to $1,416.6 million at December 31, 2023, a decrease of $515.5 million, primarily driven by the reduction in the fund withheld balance in regards to the LPT contract with Enstar.

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#### Critical Accounting Policies
We believe that the following are critical accounting policies used in