Company lists · Data refreshed September 2026

Top 14 Offshore platform insurance companies based in London, United Kingdom

RevenueBase identified 36 offshore platform insurance companies headquartered in London, United Kingdom as of September 2026 and tracks 1,384 professional contacts across them, including 499 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers offshore platform insurance companies headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review
36Companies
1,384Contacts tracked
499Verified emails
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The 14 largest offshore platform insurance companies based in London, United Kingdom

Ranked by team size
Top 14 of 36 offshore platform insurance companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to offshore platform insurance companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceLondon, United KingdomHQ checked Sep 29, 2026501-1,000449 contacts →

Indirect evidence

“At SSY, we believe that experience matters.”

Source: RevenueBase Database · checked Sep 29, 2026
2Partial evidenceLondon, United KingdomHQ checked Sep 29, 2026201-500330 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
3Partial evidenceLondon, United KingdomHQ checked Sep 29, 2026201-500102 contacts →

Partial evidence

“Alesco is a fast-growing and dynamic insurance broker that specialises in energy, construction, terrorism, alternative risk transfer, property, liability and related lines of…”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceLondon, United KingdomHQ checked Sep 29, 202651-20072 contacts →

Indirect evidence

“MatthewsDaniel is a global leader in specialist pre risk services, with risk assessment and loss adjusting at its core.”

Source: RevenueBase Database · checked Sep 29, 2026
5Partial evidenceLondon, United KingdomHQ checked Sep 29, 202611-5036 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceLondon, United KingdomHQ checked Sep 29, 202611-5021 contacts →

Partial evidence

“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…”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceLondon, United KingdomHQ checked Sep 29, 202611-5017 contacts →

Indirect evidence

“Roanoke International Brokers Limited (RIBL) is a vibrant broker situated within close proximity of Lloyd’s of London.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceLondon, United KingdomHQ checked Sep 29, 2026201-50016 contacts →

Partial evidence

“Price Forbes Marine was formed by bringing together a group of professionals who share the same values and ambitions in the shipping insurance industry.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceLondon, United KingdomHQ checked Sep 29, 202611-5015 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceLondon, United KingdomHQ checked Sep 29, 20261-108 contacts →

Partial evidence

“Clearwater UW Limited offers flexible insurance solutions to the maritime industry.”

Source: RevenueBase Database · checked Sep 29, 2026
11Partial evidenceLondon, United KingdomHQ checked Sep 29, 20261-106 contacts →

Partial evidence

“PLATINUM UNDERWRITING LTD is an insurance company based out of United Kingdom.”

Source: RevenueBase Database · checked Sep 29, 2026
12Partial evidenceLondon, United KingdomHQ checked Sep 29, 202611-503 contacts →

Partial evidence

“We are an independent, international Insurance and Reinsurance Broker based in London, and at Lloyd’s (RAP 1368), with a particular focus on every aspect of the Marine and Energy…”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceLondon, United KingdomHQ checked Sep 29, 202611-502 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceLondon, United KingdomHQ checked Sep 29, 20261-101 contacts →

Partial evidence

“London based leading MGA 100% supported by (‘A’ rated) Lloyd’s & Company markets offering specialist Marine Shipyard insurance along with bespoke ancillary products.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 14 of 36 offshore platform insurance companies based in London, United Kingdom

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Offshore platform insurance companies based in London, United Kingdom at a glance

As of Sep 29, 2026
36.1%Verified-email coverage
38.4Average contacts per company
11-50Median size (employees)
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
15
11-50
12
51-200
3
201-500
5
501-1,000
1

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 36 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among offshore platform insurance companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in London, United Kingdom whose own description of what they do matches “offshore platform insurance companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names offshore platform insurance companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among offshore platform insurance companies, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 499 across the full list. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names offshore platform insurance companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many offshore platform insurance companies are there based in London, United Kingdom?

RevenueBase identified 36 offshore platform insurance companies headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SSY, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most offshore platform insurance companies?

London leads the United Kingdom with 36 headquartered companies, followed by Aberdeen (2) and Chester (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 499 verified decision-maker contacts tracked across these 36 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 Smart Search, 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.