Company: AHL
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001628280-25-023859
Chunk: 150

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-05-08
Form: 424B4
Chunk 150
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)                                                                 |     | $                                |  432.5 |     | $    |  367.6 |     | $    |  202.3 |     | $    |  50.6 |     | $    |  -96.7 |     | $    |  -83.1 |     | $    |    0.3 |

#### Average equity
is a non-GAAP financial measure and is used in calculating ordinary shareholders return on average equity. Average equity is calculated by taking the arithmetic average of total shareholders’ equity on a quarterly basis for the stated periods excluding the average value of Preference Shares less issue expenses. Operating return on average equity is calculated by dividing operating income by average equity.

#### Return on average equity
is calculated by taking net income available to ordinary shareholders for the period and dividing it by average equity for the period.

<div align='center'>99</div>

|                                                                                         | ($ in millions, except percentages) | Twelve Months Ended December 31, |    2024 |   |     |   |    2023 |   |     |   |    2022 |   |     |   |    2021 |   |     |   |    2020 |   |     |   |    2019 |   |     |   |    2018 |   |
|:----------------------------------------------------------------------------------------|:------------------------------------|:---------------------------------|--------:|:--|:----|:--|--------:|:--|:----|:--|--------:|:--|:----|:--|--------:|:--|:----|:--|--------:|:--|:----|:--|--------:|:--|:----|:--|--------:|:--|
| Total shareholders’ equity                                                              |                                     | $                                | 3,371.9 |   |     | $ | 2,908.5 |   |     | $ | 2,358.0 |   |     | $ | 2,774.8 |   |     | $ | 2,887.2 |   |     | $ | 2,628.0 |   |     | $ | 2,640.4 |   |
| Non-controlling interest                                                                |                                     |                                  |       — |   |     |   |       — |   |     |   |       — |   |     |   |       —