Arcadian Risk Capital Announces Entry into US Excess Casualty with the hire of Matthew Mullen
Hamilton, Bermuda – Sept 17th 2026 – Arcadian Risk Capital (“Arcadian” or the “Company”), a fast-growing, specialty managing general agent (“MGA”) with operations in Bermuda, Ireland, the United Kingdom, and the United States, is announcing the appointment of Matthew Mullen as Executive Vice President to lead the Company’s expansion into the U.S. large account excess Casualty business. Allied to this appointment, Arcadian has secured blue-chip capacity as support for this initiative.
Matt brings over 35 years of underwriting and leadership experience garnered from 3 jurisdictions, USA, Bermuda & London. He is a market leader for US Domestic Casualty and joins with an impressive underwriting track record. He also brings strong distribution relationships at both Retail & Wholesale entities.
Based in New York, Matt will focus on Enterprise, Fortune level companies. The account will be excess in terms of risk characteristic and spread across multiple risk sectors. Distribution will be a blend of Retail and Wholesale.
Matt joins from Markel where his most recent role was Managing Director of Specialty. Prior to this held senior Underwriting roles at Munich, XL Bermuda & Alterra.
John Boylan, Chief Executive Officer of Arcadian, said: “We are pleased to announce the appointment of Matt. He is very well known to us all, having worked collaboratively with our Casualty teams for many years. His appointment reflects our commitment to disciplined underwriting and under Matt’s leadership in the US, this new distribution outlet will contour well with Arcadian’s existing GL business, serving to broaden the Company’s product offerings and strengthen distribution relationships”.
Commenting on his appointment, Mr. Mullen said: “I am pleased to be joining Arcadian, an entity I know will be a good fit for me, given my past relationships with many of its staff roster. Arcadian is an entity with a defined strategy, and I am delighted to be in a position to play my part in such development. Arcadian is an expanding platform, supported by experienced underwriting professionals and I want to be part of a strong and sustainable platform in the US. We have secured high-quality carrier support for this product line and look forward to executing in accordance with our strategic plan.”
This launch marks another step in the evolution of the Arcadian platform, which announced in October 2025 it had entered a strategic partnership with Lee Equity Partners, LLC (“Lee Equity”), a growth-oriented, middle-market investment firm specializing in investments in the financial and healthcare services sectors.
About Arcadian
Arcadian Risk Capital is a global specialty managing general agent (MGA) offering underwriting-led solutions for complex risks. We are client-focused, with a team of dedicated and highly experienced underwriters who have consistently demonstrated the ability to build and manage portfolios of risk throughout the insurance cycle. Innovation and client service are at the core of our business model. Founded and led by John Boylan, Arcadian is headquartered in Bermuda, with operating entities in Bermuda, Ireland, the United Kingdom, and the United States.
About Lee Equity Partners
Lee Equity Partners, LLC is a middle-market private equity firm that partners with companies in the financial and healthcare services sectors. Over nearly two decades the firm has utilized its thematic-based investment strategy and deep sector knowledge to identify and partner with talented management teams to accelerate growth and build market-leading businesses. Additional information is available at www.leeequity.com.
About SiriusPoint
SiriusPoint is a global underwriter of insurance and reinsurance providing solutions to clients and brokers around the world. Bermuda-headquartered with offices in New York, London, Stockholm and other locations, we are listed on the New York Stock Exchange (SPNT). We have licenses to write Property & Casualty and Accident & Health insurance and reinsurance globally. Our offering and distribution capabilities are strengthened by a portfolio of strategic partnerships with Managing General Agents and Program Administrators. With approximately $2.8 billion total capital, SiriusPoint’s operating companies have a financial strength rating of A- (Excellent) from AM Best, S&P and Fitch, and A3 from Moody’s. For more information, please visit www.siriuspt.com.