Company: AHL
Filing Date: 2025-11-13
Form Type: 6-K
Source: 0001267395-25-000067
Chunk: 1

Company: ASPEN INSURANCE HOLDINGS LTD
Filing Date: 2025-11-13
Form: 6-K
Chunk 1
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 Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.The information included in this Form 6-K, including the information set forth in Exhibit 99.1 and Exhibit 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

### EXHIBIT INDEX

#### Exhibit
99.1 Press Release, dated November 13, 2025

99.2 Financial Supplement, for the three and nine months ended September 30 , 2025

99.3 C onsolidated financial statements and management's discussion and analysis for the three and nine months ended September 30, 2025

### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Dated: November 13, 2025 |     | ASPEN INSURANCE HOLDINGS LIMITED 
 By:                              |     | /s/ Mark Pickering      |
|:-------------------------|:----|:---------------------------------|:----|:------------------------|
|                          |     | Name:                            |     | Mark Pickering          |
|                          |     | Title:                           |     | Chief Financial Officer |