Company: AHL
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001628280-25-023859
Chunk: 39

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-05-08
Form: 424B4
Chunk 39
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 |   |  20.7 | % |     |   |   0.3 | % |
| Basic weighted average ordinary shares outstanding (millions)(1)                                   |     |                                                           |     |                    | 90.83 |   |     |   | 90.83 |   |     |   | 90.83 |   |

_______________ (1) The results of the Exchange have been applied retroactively for all periods. (2) Book value per ordinary share excluding AOCI is a non-GAAP financial measure as defined in Regulation G. The reconciliation to the most comparable GAAP financial measure and a discussion of the rationale for the presentation of this item is provided in “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Performance Measures and Non-GAAP Financial Measures.” Book value per ordinary share excluding AOCI has been adjusted to remove the impact of AOCI of $(390.1) million, $(400.3) million and $(506.3) million as at December 31, 2024, 2023 and 2022, respectively. (3) Growth in book value per ordinary share excluding AOCI is adjusted to add back ordinary dividends of $195.0 million and $40.3 million for the twelve months ended December 31, 2024 and 2023, respectively, and also deducts the capital contributions of $40.0 million for the twelve months ended December 31, 2022.

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### RISK FACTORS
Investing in our ordinary shares involves risks. Prospective investors should carefully consider the risks described below, as well as other information contained in this prospectus before making a decision to invest in our ordinary shares. The risks described below are not the only ones we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also materially and adversely affect us in the future. Any of the following risks could materially adversely affect our business, financial condition, results of operations or cash flows and could impact any forward-looking statements. See “Cautionary Note Regarding Forward-Looking Statements.” In such case, the trading price of our ordinary shares may decline and investors may lose all or part of their original investments.

### Risks Related to Our Business
(Re)insurance Risks

We may be adversely affected by the occurrence of natural disasters, severe weather events and other catastrophe events, as well as outbreaks of pandemic or contagious diseases,