Exhibit 13.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report on Form 20-F of Aspen Insurance Holdings Limited (the “Company”) for the twelve months ended December 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), James A. Shea as Chief Executive Officer of the Company and Mark Pickering as Chief Financial Officer of the Company each hereby certifies, pursuant to and for the purposes of complying with, Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: March 30, 2026

By:

/s/ James A. Shea

Name:

James A. Shea

Title:

Chief Executive Officer

Date: March 30, 2026

By:

/s/ Mark Pickering

Name:

Mark Pickering

Title:

Chief Financial Officer