Office life at Atrium.

About Us


Lloyd’s of London

We’re one of the top-performing Managing Agents and Syndicates operating out of the world-renowned Lloyd’s building. Find out more about the market and why we’re proud to call it our home.

Group Executive


The Lloyd's Market


We believe quality is always the right choice

Atrium started in 1984, but our history dates back as far as the 1930s. Working out of Syndicate 609 at Lloyd’s, our reputation has allowed us to attract and keep some of the best industry talent. And they stay here because we trust in their expertise and self-challenging nature to make the right choices, time and time again.

Specialist underwriting

Atrium operate within the Lloyd's building in the heart of the City of London. Affiliated companies also have offices in North America. Through judicious decision-making, we’ve developed a well-balanced insurance and reinsurance portfolio across a wide range of specialist marine, energy, aerospace, non-marine and liability classes.

Independent thinkers

Independence underpins our underwriting style and claims expertise – we’re comfortable going against the grain and stepping out to take the lead where others won’t. It means when brokers have Atrium’s name on their slip, they’re confident others will follow.

Together in our approach

Our consistent underwriting profitability comes down to all of our teams working together towards the same goal. It’s a collective effort. From our managing agency colleagues, to actuarial, HR, accounts and finance – everyone feels supported to do their best work for our clients, brokers and industry partners. 

Making a real difference

Our people’s passion for fundraising and volunteering has transformed the business and made a lasting impact on the communities we’re connected with. Take a look at what we’ve been up to in years gone by.