Company lists · Data refreshed September 2026

Top 25 Commercial insurance underwriting companies based in the United Kingdom

RevenueBase identified 129 company matches for commercial insurance underwriting companies associated with the United Kingdom as of September 2026 and tracks 5,149 professional contacts across them, including 1,147 with verified work emails. London is the largest hub.

This list covers company matches for commercial insurance underwriting 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 15, 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 15, 2026 How this list was built
129Companies
5,149Contacts tracked
1,147Verified emails
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The 25 largest commercial insurance underwriting companies based in the United Kingdom

Ranked by team size
Top 25 of 129 company matches for commercial insurance underwriting companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 15, 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 15, 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 15, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 15, 2026201-500330 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 15, 20261,001-5,000237 contacts →

Exact match

“DUAL is a different kind of underwriting business.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 15, 2026201-500220 contacts →

Exact match

“hyperexponential (hx) is the agentic platform for underwriting work for commercial P&C insurance.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
5Exact matchLondon Ec3m 5bn, United KingdomHQ recorded Sep 15, 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 15, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 15, 2026501-1,000173 contacts →

Exact match

“DUAL is driven by a mission to be the MGA of choice for brokers, clients and carriers, through the provision of deep underwriting expertise and global distribution.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 15, 202651-20096 contacts →

Exact match

“Specialist MGA providing quality products for niche commercial markets.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
8Exact matchLeeds, United KingdomHQ recorded Sep 15, 202651-20076 contacts →

Exact match

“Since 1972, we’ve helped businesses and individuals to find the right insurance at competitive premiums.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
9Exact matchMid Glamorgan, United KingdomHQ recorded Sep 15, 202651-20066 contacts →

Exact match

“Moorhouse Group has recently been acquired by the exciting Lucida Group with our Managing Director, Linda Haggett, leading us forward.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
10Exact matchOxford, United KingdomHQ recorded Sep 15, 202651-20062 contacts →

Exact match

“Imaginera builds next-generation underwriting systems that empower insurance, reinsurance, ILS and broker teams through the creative application of technology.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5044 contacts →

Exact match

“Our model is built around underwriting excellence, driven by rigorous risk selection, innovative, intelligent underwriting and catastrophe modelling.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
12Exact matchNorwich, United KingdomHQ recorded Sep 15, 202651-20039 contacts →

Exact match

“Hugh J Boswell is a commercial insurance and risk management group based in Carrow Hill, Norwich.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5037 contacts →

Exact match

“Medical & Commercial International (MCI) specialises in underwriting international liability risks.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
14Exact matchRedhill, United KingdomHQ recorded Sep 15, 202651-20036 contacts →

Exact match

“Plan Insurance Brokers are a specialist commercial insurance brokerage Family-run, with over 30 years’ experience, Plan Insurance Brokers is totally independent and works to find…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
15Exact matchWatford, United KingdomHQ recorded Sep 15, 202611-5035 contacts →

Exact match

“Touchstone Underwriting are a team of innovative and experienced underwriters, specialising in commercial insurance business including the following areas: 1.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 15, 2026201-50031 contacts →

Exact match

“Barbican Insurance Group underwrites business predominantly through our syndicates at Lloyd’s.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5028 contacts →

Exact match

“Re)insurance for tougher risks.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 15, 20261-1025 contacts →

Exact match

“Navium started trading in May 2021 and was formed as a result of a partnership between Clive Washbourn (CEO), Pine Walk Capital Limited, and Fidelis Insurance Holdings Limited.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5019 contacts →

Exact match

“We’ve listened.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
20Exact matchCranleigh, United KingdomHQ recorded Sep 15, 20261-1017 contacts →

Exact match

“Business insurance for Professionals.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
21Exact matchBirmingham, United KingdomHQ recorded Sep 15, 202611-5015 contacts →

Exact match

“Underwriting of Commercial Combined and Property Owners risks with ‘A’ rated capacity for both standard and non-standard risks including non-standard construction (Including…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
22Exact matchHornchurch, United KingdomHQ recorded Sep 15, 202611-5014 contacts →

Exact match

“Incorporated Insurance Group Limited aims to be recognised as one of the leading underwriting agencies in the UK.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
23Exact matchSolihull, United KingdomHQ recorded Sep 15, 202611-5014 contacts →

Exact match

“Coversure Solihull was established to provide businesses, commercial vehicle owners and private clients with an affordable, independent insurance service and it remains that way…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
24Exact matchBelfast, United KingdomHQ recorded Sep 15, 202611-5012 contacts →

Exact match

“Underwriting and Claims Handling Agency based in Belfast, providing bespoke Commercial Motor, Liability & Contractors All Risks insurance.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
25Exact matchHarlow, United KingdomHQ recorded Sep 15, 202611-5012 contacts →

Exact match

“At kinetiQ, we’re on a clear mission, to use technology, data and traditional expertise to create a smarter, more connected approach to underwriting.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase

Showing 25 of 129 commercial insurance underwriting companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,147 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial insurance underwriting companies based in the United Kingdom at a glance

As of Sep 15, 2026
22.3%Verified-email coverage
39.9Average contacts per company
11-50Median size (employees)
35.7%Largest-city concentration · London
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
57
11-50
45
51-200
13
201-500
6
501-1,000
1
1,001-5,000
4
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 129 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 “commercial insurance underwriting 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 1,147 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 15, 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 “commercial insurance underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 129 company matches for commercial insurance underwriting 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?

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

Which city has the most commercial insurance underwriting companies?

London leads with 46 company records, followed by Birmingham (4) and Bradford (2).

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 1,147 professional contacts with verified work emails tracked across these 129 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 15, 2026.

Ready to reach these companies? Verified emails and direct dials for all 129 commercial insurance underwriting companies based in the United Kingdom. Start with a free account, no credit card.

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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.