Company lists · Data refreshed September 2026

Top 25 Specialty insurance companies based in the United Kingdom

RevenueBase identified 422 company matches for specialty insurance companies associated with the United Kingdom as of September 2026 and tracks 25,600 professional contacts across them, including 12,003 with verified work emails. London is the largest hub.

This list covers company matches for specialty insurance companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 18, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 18, 2026 How this list was built
422Companies
25,600Contacts tracked
12,003Verified emails
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The 25 largest specialty insurance companies based in the United Kingdom

Ranked by team size
Top 25 of 422 company matches for specialty insurance companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 18, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,0002,564 contacts →

Exact match

“We are a specialty insurer with more than three decades of experience in providing clients with the highest standards of underwriting and claims service worldwide.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,0001,343 contacts →

Exact match

“At QBE we’re driven by our purpose of enabling a more resilient future.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,0001,201 contacts →

Exact match

“We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,0001,115 contacts →

Exact match

“CFC is a specialist insurance provider, pioneer in emerging risk and market leader in cyber.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,000926 contacts →

Exact match

“As the insurance operations within the Markel Group Inc.(NYSE: MKL), we operate the Markel Specialty, Markel International, and Markel Global Reinsurance divisions, as well as…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,000918 contacts →

Exact match

“Our history has made us.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
7Exact matchGloucester, United KingdomHQ recorded Sep 18, 20261,001-5,000740 contacts →

Exact match

“For over 135 years, we‘ve provided specialist insurance, expert risk management and knowledge, and award-winning service* to our clients and partners.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
8Exact matchCity Of London, United KingdomHQ recorded Sep 18, 2026501-1,000694 contacts →

Exact match

“Chaucer are a leading specialty (re)insurance group working with brokers, coverholders and clients to protect and support business activities around the world.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,000690 contacts →

Exact match

“No matter where you are on your growth journey, we can help you find solutions to meet your ever-evolving insurance and risk management needs.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 18, 2026501-1,000677 contacts →

Exact match

“Tokio Marine Kiln is a leading international insurer with a reputation for specialist underwriting excellence, great people and innovative products.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 18, 2026501-1,000553 contacts →

Exact match

“CNA Hardy is a leading specialist commercial insurance provider for clients within the Lloyd’s and company markets.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 18, 2026501-1,000509 contacts →

Exact match

“ERS is the UK's largest specialist motor insurer with an A+ rating.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
13Exact matchCity Of London, United KingdomHQ recorded Sep 18, 2026501-1,000484 contacts →

Exact match

“As a global specialty insurance broker, Amwins Global Risks – formerly THB – delivers insurance and reinsurance coverage to clients around the world.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 18, 20261,001-5,000463 contacts →

Exact match

“Tokio Marine HCC is a leading specialty insurance group conducting business in approximately 180 countries and underwriting more than 100 classes of specialty insurance.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 18, 2026501-1,000449 contacts →

Exact match

“At SSY, we believe that experience matters.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 18, 2026501-1,000423 contacts →

Exact match

“The Thomas Miller Group is an international provider of market leading insurance services.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
17Exact matchCity Of London, United KingdomHQ recorded Sep 18, 2026201-500346 contacts →

Exact match

“IQUW is now Starr.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 18, 2026201-500330 contacts →

Exact match

“At Arch Insurance, we trade how you want to trade.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 18, 2026201-500268 contacts →

Exact match

“Apollo was launched in 2009 to provide clients and brokers with an agile and entrepreneurial insurance partner.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 18, 2026201-500257 contacts →

Exact match

“In an industry often shaped by legacy and complexity, Inigo was built to be different.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 18, 2026201-500234 contacts →

Exact match

“Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
22Exact matchLondon Ec3m 5bn, United KingdomHQ recorded Sep 18, 2026201-500215 contacts →

Exact match

“Newline Group is a market leading specialty insurance group that operates through three underwriting platforms: Newline Syndicate 1218 at Lloyd’s, Newline Insurance Company…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
23Exact matchManchester, United KingdomHQ recorded Sep 18, 202651-200180 contacts →

Exact match

“Munich Re Specialty combines premier specialty expertise, capabilities, and products to offer partners and customers simplified access to a wide range of specialty insurance…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
24Exact matchUnited KingdomHQ recorded Sep 18, 2026201-500174 contacts →

Exact match

“At Academy, we do insurance differently.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 18, 202651-200159 contacts →

Exact match

“BPL is the world’s leading independent broker specialising exclusively in credit and political risk insurance (CPRI) for multinational corporations, banks and financial…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase

Showing 25 of 422 specialty insurance companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,003 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Specialty insurance companies based in the United Kingdom at a glance

As of Sep 18, 2026
46.9%Verified-email coverage
60.7Average contacts per company
11-50Median size (employees)
39.1%Largest-city concentration · London
Sep 18, 2026Page data refreshed

Companies by employee count

1-10
181
11-50
150
51-200
37
201-500
19
501-1,000
12
1,001-5,000
19
10001+
2

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 422 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “specialty insurance companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 12,003 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 18, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “specialty insurance companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many specialty insurance companies are there based in the United Kingdom?

RevenueBase identified 422 company matches for specialty insurance companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Beazley tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most specialty insurance companies?

London leads with 165 company records, followed by Manchester (12) and Birmingham (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 12,003 professional contacts with verified work emails tracked across these 422 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 18, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.