Company: AHL
Filing Date: 2025-04-29
Form Type: F-1/A
Source: 0001628280-25-020463
Chunk: 410

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-04-29
Form: F-1/A
Chunk 410
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 standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audit, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audit included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audit provides a reasonable basis for our opinion.

#### Critical Audit Matters
The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

<div align='center'>F-2</div>

|                                          |     | Valuation of Incurred but not Reported Reserve Estimates, Gross and Net of Reinsurance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Description of the Matter                |     | At December 31, 2024, the Company’s reserves for losses and loss adjustment expenses, net of reinsurance, was $3,950.6 million, of which a significant proportion is incurred but not reported reserves (‘IBNR’). As described in Notes 2(b) and 10 of the consolidated financial statements, losses and loss adjustment expenses represents management’s estimate of the ultimate costs of all reported and unreported losses incurred through the balance sheet date. There is significant uncertainty inherent in estimating the IBNR, gross and net of reinsurance. In particular, management’s estimate is sensitive to the actuarial methods selected and the significant assumptions