Howden appoints Philip Stack to lead Alternative Risk & Captives capability for US clients

Miami, 3 March 2026: Howden, the global insurance broker, today announces the appointment of Philip Stack as Managing Director, Alternative Risk & Captives, Howden US.  This appointment reflects Howden’s strategy to invest in specialist expertise for the benefit of clients, as it continues to attract market-leading talent to its new US retail business.   

In his new role, Stack will advise clients on optimal insurance program structures and the use of alternative risk transfer solutions, including captives, multi‑year structured programs, parametric solutions, and fronting placements, reporting to Julie Layton and working closely with John Rowson.

Stack joins from Lockton, where he was a Senior Vice President and Senior Consultant and spent nearly six years as part of the Alternative Risk Solutions team, working with clients to deliver solutions across the full spectrum of alternative risk strategies. Prior to this, Stack spent 16 years with Marsh, including the last six years within Marsh’s Captive Solutions advisory team.

Julie Layton, Executive Managing Director, Howden US, said: “US insurance captive growth is accelerating as the market responds to demand for solutions to emerging risks such as Cyber Liability, D&O and Trade Credit, as well as the use of parametrics for catastrophe risks. We are therefore thrilled that Philip has joined us at this exciting time - as we build our US retail operation - and brings with him extensive alternative risk experience and expertise for clients who are increasingly looking for new and innovative solutions.

John Rowson, Managing Director, Howden Captive Services said: “The captive market is expanding beyond corporates with big balance sheets and international risk footprints to be a powerful solution for mid-market companies who want more control over their risks, and that are designed to scale to their size and risk appetite. With Philip having joined us to service our clients in the US, and alongside our captive operations in Guernsey, Labuan, Japan and Bermuda, we can offer a global capability for clients looking for efficient captive risk management and optimal use of capital.”

Philip Stack, Managing Director, Alternative Risk & Captives, Howden US adds: “Howden’s alternative risk offering is reinforced by its broader specialty insurance, reinsurance, analytics and ILS services, meaning clients benefit from powerful data-driven insights, cross-class expertise and global underwriting capacity. Developing solutions for clients that enable them to make bolder choices, and invest with confidence, is a key challenge I can’t wait to deliver. 

“I’m delighted to be part of the team at Howden at this pivotal moment, as it builds a different sort of business with an entrepreneurial culture where talent is empowered to do their very best for clients.”

Howden’s headcount in its new US retail operation is now over 1,000 and combines the power of a global broker with the independence, ownership, and entrepreneurial spirit of a local firm.   


Howden is a leading global insurance broking group with employee ownership at its heart. Founded in 1994, it provides insurance, reinsurance and underwriting services and solutions to clients ranging from private individuals to the largest multinational companies.

The Group operates in 57 countries in Europe, Africa, Asia, the Middle East, Latin America, the USA, Australia and New Zealand, employs over 24,000 people and manages premiums totalling USD 50+ billion on behalf of its clients.

Further information can be found at www.howdengroup.com and www.howdengroupholdings.com

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