Company lists · Data refreshed September 2026

Top 25 Marine insurance underwriting companies based in the United Kingdom

RevenueBase identified 149 company matches for marine insurance underwriting companies associated with the United Kingdom as of September 2026 and tracks 4,141 professional contacts across them, including 1,713 with verified work emails. London is the largest hub.

This list covers company matches for marine 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
149Companies
4,141Contacts tracked
1,713Verified emails
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The 25 largest marine insurance underwriting companies based in the United Kingdom

Ranked by team size
Top 25 of 149 company matches for marine 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 matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 15, 2026501-1,000584 contacts →

Exact match

“The home of NorthStandard updates.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 15, 2026501-1,000449 contacts →

Exact match

“At SSY, we believe that experience matters.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 15, 2026201-500370 contacts →

Exact match

“Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
4Exact 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
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, 202651-200180 contacts →

Exact match

“Rokstone is one of the world’s largest MGAs, with offices in the UK, Europe, USA, Asia, Africa and the Middle East.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 15, 2026201-500151 contacts →

Exact match

“Ark Syndicate Management Ltd is an insurance company based out of 30 Fenchurch Avenue, London, United Kingdom.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 15, 202651-20080 contacts →

Exact match

“TT Club is the international transport and logistics industry’s leading provider of insurance and related risk management services.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 15, 202651-20071 contacts →

Exact match

“London P&I is a leading, globally connected, mutual marine insurer our members can depend on.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5053 contacts →

Exact match

“K2 International is a specialty insurance and reinsurance underwriting platform – the London-based arm of K2 Insurance Services, a leading underwriting and distribution franchise…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
11Exact matchBristol, United KingdomHQ recorded Sep 15, 202651-20047 contacts →

Exact match

“Hayes Parsons Insurance Brokers is an independent Chartered Insurance Broker specialising in commercial and marine insurance.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
12Exact 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
13Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5036 contacts →

Exact match

“Founded in 1987, Lochain Patrick, a division of Burns & Wilcox Global solutions, is a highly respected, expert and experienced leading firm of insurance brokers.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
14Exact 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
15Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5033 contacts →

Exact match

“Marine insurance delivered properly.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
16Exact matchHull, United KingdomHQ recorded Sep 15, 202611-5032 contacts →

Exact match

“McAuslands began as McAusland Turner, a UK marine surveying and consulting firm, back in The company is the oldest Marine Surveying and Consulting firm in continuous operation in…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
17Exact 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
18Exact matchLondon, United KingdomHQ recorded Sep 15, 202651-20029 contacts →

Exact match

“aurum motor & aurum home: We underwrite high value home insurance for High Net Worth and Ultra High Net Worth individuals, providing worldwide cover for contents, art and…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
19Exact 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
20Exact matchLeeds, United KingdomHQ recorded Sep 15, 202611-5022 contacts →

Exact match

“Fiducia MGA specialise in Marine Cargo, Freight Liability, Engineering, Terrorism, Marine Equipment and Combined Liability insurance for UK Regional Brokers.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5021 contacts →

Exact match

“We are a specialist marine insurance underwriting agency located in the City of London, and market leaders for marine insurance products which provide innovative, bespoke and…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5019 contacts →

Exact match

“Globe Underwriting is a UK based managing general agent committed to providing world class underwriting services to insurance brokers across the world.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 15, 202611-5018 contacts →

Exact match

“Channing Lucas and Partners Limited (“CLP”), founded in 2007, is an independent marine insurance broker, working with clients throughout the UK and internationally.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
24Exact matchPlymouth, United KingdomHQ recorded Sep 15, 202611-5018 contacts →

Exact match

“Pantaenius UK Ltd is a leading provider of sail and motor yacht insurance with offices in Plymouth and on the River Hamble in the United Kingdom.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
25Exact matchManchester, United KingdomHQ recorded Sep 15, 202651-20018 contacts →

Exact match

“Boat Insurance you can trust.”

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

Showing 25 of 149 marine insurance underwriting companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,713 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 15, 2026
41.4%Verified-email coverage
27.8Average contacts per company
11-50Median size (employees)
57.0%Largest-city concentration · London
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
60
11-50
57
51-200
16
201-500
10
501-1,000
4
1,001-5,000
1

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 149 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 “marine 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 1,713 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 “marine insurance underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 149 company matches for marine 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?

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

Which city has the most marine insurance underwriting companies?

London leads with 85 company records, followed by Newcastle Upon Tyne (3) and Gibraltar (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 1,713 professional contacts with verified work emails tracked across these 149 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 149 marine 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.