Company lists · Data refreshed September 2026

Top 25 Reinsurance brokers based in London, United Kingdom

Name: Reinsurance brokers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 453 companies tracked

RevenueBase identified 453 reinsurance brokers headquartered in London, United Kingdom as of September 2026 and tracks 38,481 professional contacts across them, including 18,172 with verified work emails. London is the largest hub.

This list covers reinsurance brokers 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 17, 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 17, 2026 86% judged on-target in blind review

453Companies

38,481Contacts tracked

18,172Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest reinsurance brokers based in London, United Kingdom

Ranked by team size

Top 25 of 453 reinsurance brokers based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to reinsurance brokers: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Howden	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	7,834 contacts →
	Indirect evidence “We’re Howden, the people first insurance group with employee ownership at its heart.” Source: RevenueBase Database · checked Sep 17, 2026
2	Gallagher RE	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	2,463 contacts →
	Strong evidence “Gallagher Re is one of the largest global reinsurance brokers, helping clients access the capital they need with strategic solutions built for volatile markets.” Source: RevenueBase Database · checked Sep 17, 2026
3	Howden Insurance Brokers Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	2,183 contacts →
	Partial evidence “Howden Insurance Brokers Ltd is a leading provider of insurance broking, risk consulting, and employee benefits advice.” Source: RevenueBase Database · checked Sep 17, 2026
4	QBE Europe	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,343 contacts →
	Indirect evidence “At QBE we’re driven by our purpose of enabling a more resilient future.” Source: RevenueBase Database · checked Sep 17, 2026
5	BMS Group	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,273 contacts →
	Strong evidence “For over four decades, BMS has transformed risk into progress, earning our place as one of the world’s leading insurance and reinsurance brokers.” Source: RevenueBase Database · checked Sep 17, 2026
6	MS Amlin	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,201 contacts →
	Indirect evidence “We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.” Source: RevenueBase Database · checked Sep 17, 2026
7	Miller Insurance Services LLP	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,040 contacts →
	Indirect evidence “Our reputation as the finest advocates in the business comes from our exceptional people delivering exceptional results for over 120 years.” Source: RevenueBase Database · checked Sep 17, 2026
8	Markel International	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	926 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
9	Price Forbes	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	918 contacts →
	Indirect evidence “Our history has made us.” Source: RevenueBase Database · checked Sep 17, 2026
10	Marsh Commercial	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	766 contacts →
	Indirect evidence “Marsh Commercial, a Marsh business, is the SME and mid market specialist providing tailored commercial insurance placements and comprehensive end-to-end risk management.” Source: RevenueBase Database · checked Sep 17, 2026
11	Howden RE	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	752 contacts →
	Strong evidence “The global reinsurance broker and risk, capital, and strategic advisor focused on relentless innovation and superior analytics for top client service.” Source: RevenueBase Database · checked Sep 17, 2026
12	Tysers	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	727 contacts →
	Partial evidence “Tysers is a leading independent Lloyd’s insurance broker.” Source: RevenueBase Database · checked Sep 17, 2026
13	Howden, The NEW Name For Aston Lark	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	672 contacts →
	Partial evidence “In April 2022, Aston Lark became part of the Howden Group, with the aim of creating a standout full-service broker, unrivalled in its quality, scale and reach in the UK and…” Source: RevenueBase Database · checked Sep 17, 2026
14	Mcgill And Partners	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	566 contacts →
	Indirect evidence “Complex risk.” Source: RevenueBase Database · checked Sep 17, 2026
15	PIB Insurance Brokers	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	498 contacts →
	Partial evidence “PIB Insurance Brokers (PIB) are a leading insurance broker with access to risk management services.” Source: RevenueBase Database · checked Sep 17, 2026
16	SSY	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	449 contacts →
	Indirect evidence “At SSY, we believe that experience matters.” Source: RevenueBase Database · checked Sep 17, 2026
17	Thomas Miller	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	423 contacts →
	Indirect evidence “The Thomas Miller Group is an international provider of market leading insurance services.” Source: RevenueBase Database · checked Sep 17, 2026
18	Acrisure RE	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	385 contacts →
	Indirect evidence “Acrisure Re is a leading re/insurance intermediary and corporate advisor, offering bespoke and innovative capital, risk and program solutions to clients across the global…” Source: RevenueBase Database · checked Sep 17, 2026
19	Talbot Underwriting	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	370 contacts →
	Indirect evidence “Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019.” Source: RevenueBase Database · checked Sep 17, 2026
20	Arch Insurance UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	330 contacts →
	Indirect evidence “At Arch Insurance, we trade how you want to trade.” Source: RevenueBase Database · checked Sep 17, 2026
21	Riverstone International	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	326 contacts →
	Indirect evidence “RiverStone International is an industry-leading acquirer and reinsurer of legacy and discontinued insurance business.” Source: RevenueBase Database · checked Sep 17, 2026
22	Antares	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	323 contacts →
	Partial evidence “Antares provides local and international insurance and reinsurance capacity, risks transfer solutions and products through our Lloyd’s and company market platforms operating from…” Source: RevenueBase Database · checked Sep 17, 2026
23	INIGO	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	257 contacts →
	Indirect evidence “In an industry often shaped by legacy and complexity, Inigo was built to be different.” Source: RevenueBase Database · checked Sep 17, 2026
24	Specialist Risk Group	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	249 contacts →
	Indirect evidence “Specialist Risk Group (SRG) brings together individuals and businesses from across the world, who are united in our pursuit of specialism.” Source: RevenueBase Database · checked Sep 17, 2026
25	Atrium	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	234 contacts →
	Indirect evidence “Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: reinsurance brokers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names reinsurance brokers.
Partial evidence: Its own public description names part of reinsurance brokers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name reinsurance brokers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 453 reinsurance brokers based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 18,172 reachable decision-makers.

Free signup · no credit card

View the full list →

Reinsurance brokers based in London, United Kingdom at a glance

As of Sep 17, 2026

47.2%Verified-email coverage

84.9Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

174

11-50

151

51-200

201-500

501-1,000

1,001-5,000

10001+

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 453 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 reinsurance brokers, 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 “reinsurance brokers”. 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 reinsurance brokers), 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 reinsurance brokers, 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, 18,172 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 17, 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.

Reinsurance brokers by metro in the United Kingdom

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 reinsurance brokers, 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 reinsurance brokers are there based in London, United Kingdom?

RevenueBase identified 453 reinsurance brokers 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?

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

Which city has the most reinsurance brokers?

London leads with 453 headquartered companies, followed by Manchester (30) and Birmingham (26).

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 18,172 verified decision-maker contacts tracked across these 453 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 453 reinsurance brokers based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Reinsurance brokers by geography

Browse the directory

Browse: Companies home · Reinsurance brokers in United Kingdom · All United Kingdom lists · All Reinsurance brokers lists · New lists

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.