Atrium’s new Syndicate 2026 secures ‘in principle’ approval, targets initial GWP of $150m

Atrium, an insurance group operating within the specialist Lloyd’s insurance and reinsurance marketplace, has been granted “in principle” approval for its new delegated property catastrophe and weather and climate risk-focused Syndicate 2026.

The new syndicate will start underwriting from January 1st, 2026, subject to the completion of all final approvals. It will initially target gross written premiums (GWP) of $150 million for the 2026 year of account.

Syndicate 2026 has been provided with capital support from a mix of trade, institutional and traditional capital, while Aon and Evercore provided capital advisory support.

Rachel Grunert, who has 33 years of extensive experience and underwriting expertise, following her time as an Accident & Health underwriter, will lead the new syndicate as Active Underwriter.

Grunert will continue in her role as Head of Culture in addition to her new responsibilities.

Currently, Atrium manages Syndicate 609, which writes insurance and reinsurance business across property, casualty, and specialty business groups.

John Fowle, Chief Executive Officer, Atrium, commented, “Today marks an important step in the delivery of our strategic transformation agenda as we expand our product offering and relevance to brokers and clients. The launch of Syndicate 2026 enables us to maintain our leading reputation at Lloyd’s, which has, and always will be, a core part of Atrium’s DNA.

“Underpinned by robust risk insights, driven by industry-leading talent, our new Syndicate complements Syndicate 609 and allows us to match new capital partners to risk in line with differing appetites. I am confident Syndicate 2026 will bring lasting value to our brokers and clients.”