Who we are - Atrium

In a world of constant change, you need an insurer who has stood the test of time. Our reputation is built on consistency, expertise, and a client-first approach.

We manage Syndicate 609, one of the oldest syndicates at Lloyd’s, and Syndicate 2026 which launched at 1/1. With a proud history going back to the 1930s our longevity reflects the strength of our underwriting discipline, the depth of our relationships, and our ability to adapt to the evolving needs of our clients and the wider insurance marketplace.

Specialist risk solutions

At Atrium, we provide tailored risk solutions across a broad portfolio of specialist classes, including Property, Casualty, and Specialty business groups, and Specialty Reinsurance.

Our underwriting philosophy is grounded in a commitment to delivering sustainable results through disciplined risk selection, in-depth technical knowledge, and a collaborative approach with our broking partners and clients.

Expertise and empowerment

Atrium combines the strength of tradition with a forward-looking mindset. We take pride in our people. Our underwriters are not only experts in their fields but are also empowered to make well-informed decisions in close partnership with our brokers and clients.

This allows us to offer bespoke coverage and flexible solutions, particularly in complex or niche areas where standard products may fall short. We combine traditional underwriting values with modern analytical tools, ensuring that every risk we write is evaluated with both experience and precision.

A culture of integrity and collaboration

Atrium’s culture is defined by professionalism, transparency, and accountability.  We are committed to maintaining long-term relationships with our clients, brokers, and capital providers, built on mutual trust and shared success.

Our leadership team is highly experienced with a long tenure. This has helped foster a strong corporate culture and an inclusive workplace environment where collaboration and innovation are actively encouraged.

Investing in the future

We are forward-looking, we invest in talent, technology, and operational excellence to ensure we remain competitive in a rapidly changing world. From navigating emerging risks to embracing sustainability and ESG considerations, we continue to evolve while holding firm to the values that have shaped our business over four decades.

Through years of experience, we believe we are the best route to Lloyd’s, leveraging its global licences and financial strength to deliver underwriting excellence across borders. With an unwavering commitment to service and a clear focus on value creation, we strive to be a trusted partner in risk — today, tomorrow, and into the future.

Security Rating

Syndicate 609 and Syndicate 2026 benefits from the Lloyd’s ratings and the Lloyd’s Chain of Security: an A rating from A.M. Best, A+ from Standard & Poor’s and AA- from Fitch. Lloyd’s rating.

As is traditional with Lloyd’s, Syndicate 609’s capital is provided by a combination of individual third parties names who provide approximately 75% of the capital with approximately 25% of Syndicate 609’s underwriting capacity provided through the Atrium Underwriting Group via an Atrium owned corporate member called Atrium Corporate Capital Limited. Syndicate 2026’s capital is provided through a collective of third party providers.