What is Atrium Underwriters Ltd's NAICS code?

Atrium Underwriters Ltd's NAICS code is 524 (Insurance Carriers and Related Activities).

Insights

Strong Market Position Atrium Underwriters Ltd is a top-performing Lloyd’s syndicate with a diversified portfolio across Property, Casualty, and Specialty sectors, demonstrating stability and growth potential that can be appealing to partners seeking a reliable insurance provider.

Innovative Technology Use The company actively invests in AI and insurtech solutions, having launched BrokerBrief, an AI-driven claims handling tool, indicating openness to digital transformation and opportunities for tech-enabled partnerships.

Recent Industry Moves Atrium's acquisition by CRC Group signals potential for expanded resources and market reach, creating opportunities for supporting integration, cross-selling, or supplementary services within the broader insurance ecosystem.

Leadership Expansion Recent promotions, including Heads of Motor and US General Liability, suggest strategic growth in key insurance lines, making Atrium a promising prospect for specialized insurance services, consulting, or advanced risk management solutions.

Financial Resources With revenues estimated between $100 million and $250 million and a stable record of high profitability, Atrium represents a financially solid partner for collaborations that require trustworthy, high-capability insurance services.

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Atrium Underwriters Ltd Tech Stack

Atrium Underwriters Ltd uses 8 technology products and services including Open Graph, SQL, Apple iCloud Mail, and more. Explore Atrium Underwriters Ltd's tech stack below.

Open Graph
Content Management System
SQL
Database
Apple iCloud Mail
Email
Angular
Javascript Frameworks
jQuery
Javascript Libraries
HSTS
Security
Google Tag Manager
Tag Management
X-Content-Type-Options
Web & Portal Technology

Media & News

Atrium Underwriters Ltd's Email Address Formats

Atrium Underwriters Ltd uses at least 1 format(s):

Atrium Underwriters Ltd Email Formats	Example	Percentage
First.Last@atrium-uw.com	John.Doe@atrium-uw.com	85%
First.Middle@atrium-uw.com	John.Michael@atrium-uw.com	8%
Last@atrium-uw.com	Doe@atrium-uw.com	7%

Frequently Asked Questions

Where is Atrium Underwriters Ltd's headquarters located?

Atrium Underwriters Ltd's main headquarters is located at 8 Bishopsgate Level London, England ec2n 4bq United Kingdom. The company has employees across 3 continents, including EuropeNorth AmericaAsia.

What is Atrium Underwriters Ltd's phone number?

You can contact Atrium Underwriters Ltd's main corporate office by phone at

+44-442073****

. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Atrium Underwriters Ltd's stock symbol?

Atrium Underwriters Ltd is a publicly traded company; the company's stock symbol is 0MK2.L.

What is Atrium Underwriters Ltd's official website and social media links?

Atrium Underwriters Ltd's official website is atrium-uw.com and has social profiles on LinkedIn.

How much revenue does Atrium Underwriters Ltd generate?

As of April 2026, Atrium Underwriters Ltd's annual revenue is estimated to be $10M.

What is Atrium Underwriters Ltd's SIC code NAICS code?

Atrium Underwriters Ltd's SIC code is 6411 - Insurance Agents, Brokers, and Service NAICS code is 524 - Insurance Carriers and Related Activities.

How many employees does Atrium Underwriters Ltd have currently?

As of April 2026, Atrium Underwriters Ltd has approximately 248 employees across 3 continents, including EuropeNorth AmericaAsia. Key team members include Chief Strategy Officer (cso): H. M.Chief Operating Officer: J. T. F.Chief Risk Officer: S. S.. Explore Atrium Underwriters Ltd's employee directory with LeadIQ.

What industry does Atrium Underwriters Ltd belong to?

Atrium Underwriters Ltd operates in the Insurance industry.

What technology does Atrium Underwriters Ltd use?

Atrium Underwriters Ltd's tech stack includes Open GraphSQLApple iCloud MailAngularjQueryHSTSGoogle Tag ManagerX-Content-Type-Options.

What is Atrium Underwriters Ltd's email format?

Atrium Underwriters Ltd's email format typically follows the pattern of First.Last@atrium-uw.com. Find more Atrium Underwriters Ltd email formats with LeadIQ.

When was Atrium Underwriters Ltd founded?

Atrium Underwriters Ltd was founded in 1932.

Atrium Underwriters Ltd

Q: What is Atrium Underwriters Ltd's official website and social media links?

Atrium Underwriters Ltd's official website is atrium-uw.com. Atrium Underwriters Ltd has social profiles on LinkedIn.

Q: How many employees does Atrium Underwriters Ltd have currently?

Atrium Underwriters Ltd has approximately 248 employees.

Q: What technology does Atrium Underwriters Ltd use?

Atrium Underwriters Ltd's tech stack includes SQL, Duck Creek Platform, Google Tag Manager, Bootstrap, Video.js.

InsuranceEngland, United Kingdom201-500 Employees

Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market. With a proud history going back to the 1930s, we protect our clients around the world from the risks they face. 
Atrium is ranked as one of the top-performing Lloyd’s Syndicates of the past decade, measured by high profitability and low volatility, achieving substantial growth whilst generating value for the Group.
Syndicate 609 and Syndicate 2026 write a diversified insurance and reinsurance portfolio across the Property, Casualty, and Specialty business groups.