Aspen Insurance (AHL) details shareholder information statement on merger

Rhea-AI Filing Summary

Aspen Insurance Holdings Limited submitted a Form 6-K describing a new information statement sent to shareholders of record as of August 27, 2025. The statement relates to an Agreement and Plan of Merger entered into on that same date among Aspen, Endurance Specialty Insurance Ltd. and Ajax Ltd.

The company explains that the full information statement is available to investors on its website under the Investors section. Aspen also furnished a related press release as Exhibit 99.1, noting that this material is being provided for informational purposes and is not automatically incorporated into other securities law filings.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2025

Commission File Number: 001-31909

ASPEN INSURANCE HOLDINGS LIMITED

(Translation of registrant’s name into English)

141 Front Street

Hamilton HM 19

Bermuda

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ý Form 40-F ¨

On September 11, 2025, Aspen Insurance Holdings Limited (the “Company”) issued a press release announcing that an information statement was provided to its shareholders of record as of August 27, 2025 (the “Record Date”) in connection with the Agreement and Plan of Merger entered into on the Record Date, by and among the Company, Endurance Specialty Insurance Ltd. and Ajax Ltd. A copy of the information statement is available under the “Investors” tab of the Company’s website at https://s27.q4cdn.com/674865338/files/doc_downloads/2025/Information-Statement.pdf.

The press release, furnished as Exhibit 99.1 to this Form 6-K, is incorporated by reference as part of this Form 6-K.

The information included in this Form 6-K 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 September 11, 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.

ASPEN INSURANCE HOLDINGS LIMITED

Dated: September 11, 2025

By:

Name:

Mark Cloutier

Title:

Executive Chairman & Group Chief Executive Officer

FAQ

What did Aspen Insurance Holdings Limited (AHL) disclose in this Form 6-K?

Aspen Insurance Holdings Limited disclosed that it provided an information statement to shareholders of record as of August 27, 2025 regarding an Agreement and Plan of Merger among Aspen, Endurance Specialty Insurance Ltd. and Ajax Ltd.

Which shareholders of Aspen Insurance Holdings Limited (AHL) received the merger information statement?

The information statement was provided to shareholders of record as of August 27, 2025, which Aspen identifies as the Record Date for this communication.

Where can investors access Aspen Insurance Holdings Limited’s (AHL) merger information statement?

Aspen states that a copy of the information statement is available under the “Investors” tab of its website at the specific PDF link provided in the disclosure.

What is the relationship between Aspen, Endurance Specialty Insurance Ltd. and Ajax Ltd. mentioned in this filing?

Aspen describes that it entered into an Agreement and Plan of Merger on August 27, 2025 by and among Aspen Insurance Holdings Limited, Endurance Specialty Insurance Ltd. and Ajax Ltd..

What is Exhibit 99.1 to Aspen Insurance Holdings Limited’s (AHL) Form 6-K?

Exhibit 99.1 is a press release dated September 11, 2025, which Aspen furnished with the Form 6-K and incorporated by reference as part of this report.

Does Aspen Insurance Holdings Limited (AHL) consider the Form 6-K information to be filed for liability purposes?

Aspen states that the information in this Form 6-K is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or automatically incorporated by reference into other securities law filings, unless specifically referenced there.