Aspen Appoints Mariza Costa as Head of Investor Relations

Hamilton, Bermuda, July 1, 2025 — Aspen Insurance Holdings Limited (“Aspen”) (NYSE: AHL) has appointed Mariza Costa as Head of Investor Relations.

Mariza brings more than 20 years’ experience across investor relations, rating agency management, equity research and credit ratings to this newly created role. She most recently served as Vice President, Rating Agency Relations and Corporate Finance, at Everest Group.

Previously, Mariza held roles at AM Best Company’s Ratings Division as Associate Director, Reinsurance and Large Commercial, Allianz Global Corporate & Specialty as Broker Compensation Manager, and Stifel Nicolaus Corp. Inc., as Senior Associate Analyst, Property & Casualty Insurance.

Mark Pickering, Aspen Group CFO & Treasurer, said: “Mariza is an excellent addition to the Aspen family, representing an important step in advancing Aspen’s engagement with our investor, analyst and ratings communities. Her extensive industry expertise, capital markets acumen and strong financial leadership will play an important role as we continue to further enhance our financial performance and profitability for our shareholders.”

Mariza’s role will include managing relationships between Aspen and its investors, analysts, ratings and other financial stakeholders, providing shareholder analyses and supporting the communication of the Company’s financial performance, growth strategies and investment opportunities to shareholders and the investment community.

Marc MacGillivray, Aspen Group Chief Accounting Officer, said: “Mariza brings a wealth of experience, having the rare blend of hands-on investor relations execution and deep analytical rigor that will amplify our corporate narrative and financial foresight to the market as we unlock new growth opportunities. I look forward to her joining Aspen and welcome her to the team.”