Company lists · Data refreshed September 2026

Top 25 Insurance brokerage firms based in the United Kingdom

Name: Insurance brokerage firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,756 companies tracked

RevenueBase identified 1,756 insurance brokerage firms headquartered in the United Kingdom as of September 2026 and tracks 117,122 professional contacts across them, including 45,134 with verified work emails. London is the largest hub.

This list covers insurance brokerage firms headquartered in the 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

1,756Companies

117,122Contacts tracked

45,134Verified emails

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The 25 largest insurance brokerage firms based in the United Kingdom

Ranked by team size

Top 25 of 1,756 insurance brokerage firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to insurance brokerage firms: 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	AON	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	63,446 contacts →
	Indirect evidence “We exist to shape decisions for the better, to protect and enrich the lives of people around the world.” Source: RevenueBase Database · checked Sep 17, 2026
2	Howden	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	7,834 contacts →
	Partial evidence “We’re Howden, the people first insurance group with employee ownership at its heart.” Source: RevenueBase Database · checked Sep 17, 2026
3	Gallagher RE	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	2,463 contacts →
	Indirect 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
4	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
5	Charles Taylor	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,713 contacts →
	Partial evidence “Charles Taylor provides an unrivalled and growing range of insurance services, claims and technology solutions across the globe, with a specialism in complex situations requiring…” Source: RevenueBase Database · checked Sep 17, 2026
6	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
7	Barnett Waddingham	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,331 contacts →
	Partial evidence “We are a leading UK professional services consultancy at the forefront of risk, pensions, investment and insurance.” Source: RevenueBase Database · checked Sep 17, 2026
8	BMS Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,273 contacts →
	Partial 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
9	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
10	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
11	Brit Insurance	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	844 contacts →
	Indirect evidence “If the future was predictable, there would be no risk and if change was linear, there’d be no need for experts.” Source: RevenueBase Database · checked Sep 17, 2026
12	Marsh Commercial	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	766 contacts →
	Partial 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
13	Howden RE	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	752 contacts →
	Indirect 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
14	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
15	Brown & Brown UK	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	690 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
16	Howden, The NEW Name For Aston Lark	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	672 contacts →
	Indirect 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
17	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
18	CNA Hardy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	553 contacts →
	Partial evidence “CNA Hardy is a leading specialist commercial insurance provider for clients within the Lloyd’s and company markets.” Source: RevenueBase Database · checked Sep 17, 2026
19	Reassured	Partial evidence	Basingstoke, United KingdomHQ checked Sep 17, 2026	501-1,000	552 contacts →
	Partial evidence “Reassured is the UK’s largest life insurance broker*, supporting thousands of new customers every month to protect what matters most.” Source: RevenueBase Database · checked Sep 17, 2026
20	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
21	Amwins Global Risks	Partial evidence	City Of London, United KingdomHQ checked Sep 17, 2026	501-1,000	484 contacts →
	Partial evidence “As a global specialty insurance broker, Amwins Global Risks – formerly THB – delivers insurance and reinsurance coverage to clients around the world.” Source: RevenueBase Database · checked Sep 17, 2026
22	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
23	Thomas Miller	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	423 contacts →
	Partial evidence “The Thomas Miller Group is an international provider of market leading insurance services.” Source: RevenueBase Database · checked Sep 17, 2026
24	Partners	Partial evidence	High Wycombe, United KingdomHQ checked Sep 17, 2026	501-1,000	398 contacts →
	Partial evidence “Welcome to the next generation insurance advisory – specialists in business and private client insurance, employee wellbeing, engagement and benefits, and risk management.” Source: RevenueBase Database · checked Sep 17, 2026
25	Acrisure RE	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	385 contacts →
	Partial 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

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: insurance brokerage firms. 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 insurance brokerage firms.
Partial evidence: Its own public description names part of insurance brokerage firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insurance brokerage firms. 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 1,756 insurance brokerage firms based in the United Kingdom

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Insurance brokerage firms based in the United Kingdom at a glance

As of Sep 17, 2026

38.5%Verified-email coverage

66.7Average contacts per company

1-10Median size (employees)

21.7%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

871

11-50

578

51-200

177

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,756 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 insurance brokerage firms, 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 the United Kingdom whose own description of what they do matches “insurance brokerage firms”. 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 insurance brokerage firms), 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 insurance brokerage firms, and records with no verified work email. Companies headquartered outside United Kingdom 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, 45,134 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.

Insurance brokerage firms by metro

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 insurance brokerage firms, 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 insurance brokerage firms are there based in the United Kingdom?

RevenueBase identified 1,756 insurance brokerage firms headquartered in the 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?

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

Which city has the most insurance brokerage firms?

London leads with 381 headquartered companies, followed by Manchester (42) and Birmingham (28).

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 45,134 verified decision-maker contacts tracked across these 1,756 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.

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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.