Arcadian Risk Capital Hired Mullen for US Expansion
The veteran underwriter will lead the company's new push into the US enterprise casualty market.
Updated on Sept. 22, 2026 in People
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Arcadian Risk Capital has appointed Matthew Mullen as executive vice-president to oversee its entry into the US enterprise casualty market. Based in New York, Mullen brings 35 years of underwriting experience to the firm.
Why it matters
This move enables Arcadian to deploy multiyear underwriting capacity into the US market by leveraging Mullen’s established retail distribution and broker network. The expansion follows a growth investment from Lee Equity Partners, LLC, which occurred in January 2026.
Matthew Mullen joins the team with 35 years of underwriting experience, following a growth investment provided by Lee Equity Partners, LLC in January 2026. The firm now operates across Bermuda, Ireland, the United Kingdom, and the United States.
The players
Matthew Mullen
An executive with 35 years of underwriting experience and former managing director of specialty insurance at Markel.
Arcadian Risk Capital
An international insurance provider operating in Bermuda, Ireland, the UK, and the US.
Lee Equity Partners, LLC
A private equity firm that provided a growth investment to support Arcadian.
The details
Mullen will construct the US enterprise casualty portfolio by structuring excess risk across multiple industry sectors. He will utilize his existing retail distribution channels and broker relationships to gain traction in the competitive US market. This strategy integrates the company's newly secured multiyear underwriting capacity into an existing operational network.
Timeline
January 2026: Lee Equity Partners invested in Arcadian.
September 22, 2026: Arcadian announced the appointment of Matthew Mullen.
Market Landscape
The appointment of Matthew Mullen follows the January 2026 growth investment from Lee Equity Partners, LLC. This move marks the firm's latest step in executing its broader strategy to scale its footprint in the US enterprise risk market.
Operators in the casualty insurance space should watch how Arcadian’s new multiyear underwriting capacity impacts pricing and risk appetite in the US enterprise market. Firms should monitor broker feedback on the company's penetration into established distribution channels.
The takeaway
The firm is scaling its US presence by leaning on executive experience rather than just new capital. Operators should evaluate whether their own current broker and underwriting relationships provide the necessary capacity and sector-specific expertise for their risk profiles.
Further reading
For more on industry talent shifts, visit the People section.
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