Company: AHL
Filing Date: 2025-05-08
Form Type: 424B4
Source: 0001628280-25-023859
Chunk: 469

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-05-08
Form: 424B4
Chunk 469
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).

<div align='center'>F-58</div>

The $324.8 million that are available to offset future U.S. federal taxable income will expire between 2032 and 2041. The amount of pre-merger net operating losses carryforwards that can be used each year is limited by section 382 to $6.5 million per year for Aspen UK’s U.S. branch, and $20.8 million per year for the next 15 years for the U.S. operating subsidiaries.

The net operating losses in the U.K. and other jurisdictions are available to offset future corporate income in those jurisdictions over an indefinite period.

For U.S. federal income tax purposes, the Company has capital loss carryforwards of $84.7 million, of which $51.6 million relates to the U.S. operating subsidiaries and $33.1 million to Aspen UK’s branch, expiring between 2026 and 2028.

For U.K. corporate tax purposes, the Company has foreign tax credit carryforwards of $22.0 million (2023 — $19.0 million) which are available to offset future U.K. corporate tax arising on the same foreign source of income over an indefinite period.

A valuation allowance of $22.9 million (2023 — $24.5 million) on U.S. deferred tax assets (which includes these loss carryforwards) has been recognized at December 31, 2024 relating to Aspen UK’s U.S. branch.

A valuation allowance of $26.1 million (2023 — $131.0 million) has been established against U.K. deferred tax assets.

The U.K., U.S. and other jurisdictions valuation allowance combined total is $64.0 million (2023 — $172.7 million).

<div align='center'>F-59</div>

#### 12.

#### Capital Structure
The following table provides a summary of the Company’s authorized and issued share capital as at December 31, 2024 and 2023:

|                                                                                                                                                                              |     |        | As at December 31, 2024 |     |           |     |     |        | At December 31, 2023 |     |           |     |
|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----|:-------|------------------------:|:----|:----------|----:|:----|:-------|---------------------:|:----|:----------|----:|
|                                                                                                                                                                              |     | Number |                         |