Company lists · Data refreshed September 2026
Top 25 Reinsurance underwriting companies based in the United Kingdom
RevenueBase identified 207 company matches for reinsurance underwriting companies associated with the United Kingdom as of September 2026 and tracks 29,337 professional contacts across them, including 13,784 with verified work emails. London is the largest hub.
This list covers company matches for reinsurance 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 16, 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.
The 25 largest reinsurance underwriting companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,564 contacts → | ||||
Exact match “We are a specialty insurer with more than three decades of experience in providing clients with the highest standards of underwriting and claims service worldwide.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 2 | 2,463 contacts → | ||||
Exact match “Gallagher Re is one of the largest global reinsurance brokers, helping clients access the capital they need with strategic solutions built for volatile markets.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 3 | 1,343 contacts → | ||||
Exact match “At QBE we’re driven by our purpose of enabling a more resilient future.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 4 | 1,273 contacts → | ||||
Exact match “For over four decades, BMS has transformed risk into progress, earning our place as one of the world’s leading insurance and reinsurance brokers.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 5 | 1,201 contacts → | ||||
Exact match “We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 6 | 926 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 7 | 918 contacts → | ||||
Exact match “Our history has made us.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 8 | 853 contacts → | ||||
Exact match “We are Canopius, a global specialty and Property & Casualty (re)insurer with offices in the UK, the US, Bermuda, Singapore and Australia.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 9 | 844 contacts → | ||||
Exact match “If the future was predictable, there would be no risk and if change was linear, there’d be no need for experts.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 10 | 752 contacts → | ||||
Exact match “The global reinsurance broker and risk, capital, and strategic advisor focused on relentless innovation and superior analytics for top client service.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 11 | 694 contacts → | ||||
Exact match “Chaucer are a leading specialty (re)insurance group working with brokers, coverholders and clients to protect and support business activities around the world.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 12 | 690 contacts → | ||||
Exact match “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.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 13 | 677 contacts → | ||||
Exact match “Tokio Marine Kiln is a leading international insurer with a reputation for specialist underwriting excellence, great people and innovative products.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 14 | 566 contacts → | ||||
Exact match “Complex risk.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 15 | 484 contacts → | ||||
Exact match “As a global specialty insurance broker, Amwins Global Risks – formerly THB – delivers insurance and reinsurance coverage to clients around the world.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 16 | 463 contacts → | ||||
Exact match “Tokio Marine HCC is a leading specialty insurance group conducting business in approximately 180 countries and underwriting more than 100 classes of specialty insurance.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 17 | 385 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 18 | 370 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 16, 2026 · View company records in RevenueBase | |||||
| 19 | 346 contacts → | ||||
Exact match “IQUW is now Starr.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 20 | 326 contacts → | ||||
Exact match “RiverStone International is an industry-leading acquirer and reinsurer of legacy and discontinued insurance business.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 21 | 323 contacts → | ||||
Exact match “Antares provides local and international insurance and reinsurance capacity, risks transfer solutions and products through our Lloyd’s and company market platforms operating from…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 22 | 268 contacts → | ||||
Exact match “Apollo was launched in 2009 to provide clients and brokers with an agile and entrepreneurial insurance partner.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 23 | 257 contacts → | ||||
Exact match “In an industry often shaped by legacy and complexity, Inigo was built to be different.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 24 | 249 contacts → | ||||
Exact match “Specialist Risk Group (SRG) brings together individuals and businesses from across the world, who are united in our pursuit of specialism.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
| 25 | 234 contacts → | ||||
Exact match “Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “reinsurance underwriting companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 207 reinsurance underwriting companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 13,784 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Reinsurance underwriting companies based in the United Kingdom at a glance
As of Sep 16, 2026Companies by employee count
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 207 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 “reinsurance 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 13,784 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 16, 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 “reinsurance underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many reinsurance underwriting companies are there based in the United Kingdom?
RevenueBase identified 207 company matches for reinsurance 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?
Beazley tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most reinsurance underwriting companies?
London leads with 142 company records, followed by City Of London (8) and Manchester (5).
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 13,784 professional contacts with verified work emails tracked across these 207 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 16, 2026.
Ready to reach these companies? Verified emails and direct dials for all 207 reinsurance underwriting companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Reinsurance underwriting companies by geography
- Reinsurance underwriting companies based in Argentina
- Reinsurance underwriting companies based in Australia
- Reinsurance underwriting companies based in Bermuda
- Reinsurance underwriting companies based in Brazil
- Reinsurance underwriting companies based in Canada
- Reinsurance underwriting companies based in France
- Reinsurance underwriting companies based in Germany
- Reinsurance underwriting companies based in India
- Reinsurance underwriting companies based in Italy
- Reinsurance underwriting companies based in Mexico
- Reinsurance underwriting companies based in the Netherlands
- Reinsurance underwriting companies based in South Africa
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Reinsurance underwriting companies based in Argentina
- Reinsurance underwriting companies based in Australia
- Reinsurance underwriting companies based in Bermuda
- Reinsurance underwriting companies based in Brazil
- Reinsurance underwriting companies based in Canada
- Reinsurance underwriting companies based in France
Company intelligence · public preview
Top 25 reinsurance underwriting companies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 207 matching company records for reinsurance underwriting companies based in the United Kingdom, with 29,337 tracked contacts and 13,784 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 16, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 reinsurance underwriting companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Beazleybeazley.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,564 contacts → |
“We are a specialty insurer with more than three decades of experience in providing clients with the highest standards of underwriting and claims service worldwide.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Gallagher REajg.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,463 contacts → |
“Gallagher Re is one of the largest global reinsurance brokers, helping clients access the capital they need with strategic solutions built for volatile markets.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  QBE Europeqbeeurope.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,343 contacts → |
“At QBE we’re driven by our purpose of enabling a more resilient future.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  BMS Groupbmsgroup.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,273 contacts → |
“For over four decades, BMS has transformed risk into progress, earning our place as one of the world’s leading insurance and reinsurance brokers.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | MS Amlinmsamlin.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,201 contacts → |
“We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Markel Internationalmarkel.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 926 contacts → |
“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…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Price Forbespriceforbes.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 918 contacts → |
“Our history has made us.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Canopius Groupcanopius.comHQ: 22 Bishopsgate, United KingdomReported employees: 501-1,000 | 22 Bishopsgate, United Kingdom | 501-1,000 | Exact match | 853 contacts → |
“We are Canopius, a global specialty and Property & Casualty (re)insurer with offices in the UK, the US, Bermuda, Singapore and Australia.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Brit Insurancebritinsurance.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 844 contacts → |
“If the future was predictable, there would be no risk and if change was linear, there’d be no need for experts.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Howden REhowdenre.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 752 contacts → |
“The global reinsurance broker and risk, capital, and strategic advisor focused on relentless innovation and superior analytics for top client service.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Chaucer Groupchaucergroup.com HQ: City Of London, United KingdomReported employees: 501-1,000 | City Of London, United Kingdom | 501-1,000 | Exact match | 694 contacts → |
“Chaucer are a leading specialty (re)insurance group working with brokers, coverholders and clients to protect and support business activities around the world.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Brown & Brown UKbbrown.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 690 contacts → |
“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.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Tokio Marine Kilntmkiln.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 677 contacts → |
“Tokio Marine Kiln is a leading international insurer with a reputation for specialist underwriting excellence, great people and innovative products.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Mcgill And Partnersmcgillpartners.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 566 contacts → |
“Complex risk.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Amwins Global Risksamwinsglobalrisks.comHQ: City Of London, United KingdomReported employees: 501-1,000 | City Of London, United Kingdom | 501-1,000 | Exact match | 484 contacts → |
“As a global specialty insurance broker, Amwins Global Risks – formerly THB – delivers insurance and reinsurance coverage to clients around the world.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Tokio Marine HCC Internationaltmhcc.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 463 contacts → |
“Tokio Marine HCC is a leading specialty insurance group conducting business in approximately 180 countries and underwriting more than 100 classes of specialty insurance.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Acrisure REacrisurere.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 385 contacts → |
“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…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Talbot Underwritingtalbot.aig.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 370 contacts → |
“Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  IQUWiquw.comHQ: City Of London, United KingdomReported employees: 201-500 | City Of London, United Kingdom | 201-500 | Exact match | 346 contacts → |
“IQUW is now Starr.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Riverstone Internationalriverstoneinternational.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 326 contacts → |
“RiverStone International is an industry-leading acquirer and reinsurer of legacy and discontinued insurance business.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Antaresantaresglobal.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 323 contacts → |
“Antares provides local and international insurance and reinsurance capacity, risks transfer solutions and products through our Lloyd’s and company market platforms operating from…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Apolloapollounderwriting.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 268 contacts → |
“Apollo was launched in 2009 to provide clients and brokers with an agile and entrepreneurial insurance partner.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  INIGOinigoinsurance.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 257 contacts → |
“In an industry often shaped by legacy and complexity, Inigo was built to be different.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Specialist Risk Groupspecialistrisk.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 249 contacts → |
“Specialist Risk Group (SRG) brings together individuals and businesses from across the world, who are united in our pursuit of specialism.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Atriumatrium-uw.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 234 contacts → |
“Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 207 company matches
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Reinsurance underwriting companies: dataset insights
September 16, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
205 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 207 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 16, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for reinsurance underwriting companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many reinsurance underwriting companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 207 matching company records, 29,337 tracked contacts and 13,784 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 16, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Reinsurance underwriting companies by geography
- Reinsurance underwriting companies based in Argentina
- Reinsurance underwriting companies based in Australia
- Reinsurance underwriting companies based in Bermuda
- Reinsurance underwriting companies based in Brazil
- Reinsurance underwriting companies based in Canada
- Reinsurance underwriting companies based in France
- Reinsurance underwriting companies based in Germany
- Reinsurance underwriting companies based in India
- Reinsurance underwriting companies based in Italy
- Reinsurance underwriting companies based in Mexico
- Reinsurance underwriting companies based in the Netherlands
- Reinsurance underwriting companies based in South Africa
Cite this list
RevenueBase Data Team. Top 25 reinsurance underwriting companies based in the United Kingdom. Snapshot: September 16, 2026. https://revenuebase.ai/companies/reinsurance-underwriting-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Reinsurance underwriting companies based in Argentina
- Reinsurance underwriting companies based in Australia
- Reinsurance underwriting companies based in Bermuda
- Reinsurance underwriting companies based in Brazil
- Reinsurance underwriting companies based in Canada
- Reinsurance underwriting companies based in France
Company intelligence · public preview
Top 25 reinsurance underwriting companies based in the United Kingdom
RevenueBase records 207 matching company records for reinsurance underwriting companies based in the United Kingdom, with 29,337 tracked contacts and 13,784 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 16, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 reinsurance underwriting companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Beazleybeazley.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,564 contacts → |
“We are a specialty insurer with more than three decades of experience in providing clients with the highest standards of underwriting and claims service worldwide.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Gallagher REajg.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 2,463 contacts → |
“Gallagher Re is one of the largest global reinsurance brokers, helping clients access the capital they need with strategic solutions built for volatile markets.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | QBE Europeqbeeurope.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,343 contacts → |
“At QBE we’re driven by our purpose of enabling a more resilient future.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | BMS Groupbmsgroup.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,273 contacts → |
“For over four decades, BMS has transformed risk into progress, earning our place as one of the world’s leading insurance and reinsurance brokers.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | MS Amlinmsamlin.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,201 contacts → |
“We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Markel Internationalmarkel.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 926 contacts → |
“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…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Price Forbespriceforbes.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 918 contacts → |
“Our history has made us.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Canopius Groupcanopius.com HQ: 22 Bishopsgate, United KingdomReported employees: 501-1,000 | 22 Bishopsgate, United Kingdom | 501-1,000 | Exact match | 853 contacts → |
“We are Canopius, a global specialty and Property & Casualty (re)insurer with offices in the UK, the US, Bermuda, Singapore and Australia.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Brit Insurancebritinsurance.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 844 contacts → |
“If the future was predictable, there would be no risk and if change was linear, there’d be no need for experts.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Howden REhowdenre.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 752 contacts → |
“The global reinsurance broker and risk, capital, and strategic advisor focused on relentless innovation and superior analytics for top client service.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Chaucer Groupchaucergroup.com HQ: City Of London, United KingdomReported employees: 501-1,000 | City Of London, United Kingdom | 501-1,000 | Exact match | 694 contacts → |
“Chaucer are a leading specialty (re)insurance group working with brokers, coverholders and clients to protect and support business activities around the world.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Brown & Brown UKbbrown.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 690 contacts → |
“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.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Tokio Marine Kilntmkiln.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 677 contacts → |
“Tokio Marine Kiln is a leading international insurer with a reputation for specialist underwriting excellence, great people and innovative products.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Mcgill And Partnersmcgillpartners.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 566 contacts → |
“Complex risk.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Amwins Global Risksamwinsglobalrisks.com HQ: City Of London, United KingdomReported employees: 501-1,000 | City Of London, United Kingdom | 501-1,000 | Exact match | 484 contacts → |
“As a global specialty insurance broker, Amwins Global Risks – formerly THB – delivers insurance and reinsurance coverage to clients around the world.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Tokio Marine HCC Internationaltmhcc.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 463 contacts → |
“Tokio Marine HCC is a leading specialty insurance group conducting business in approximately 180 countries and underwriting more than 100 classes of specialty insurance.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Acrisure REacrisurere.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 385 contacts → |
“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…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Talbot Underwritingtalbot.aig.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 370 contacts → |
“Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | IQUWiquw.com HQ: City Of London, United KingdomReported employees: 201-500 | City Of London, United Kingdom | 201-500 | Exact match | 346 contacts → |
“IQUW is now Starr.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Riverstone Internationalriverstoneinternational.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 326 contacts → |
“RiverStone International is an industry-leading acquirer and reinsurer of legacy and discontinued insurance business.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Antaresantaresglobal.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 323 contacts → |
“Antares provides local and international insurance and reinsurance capacity, risks transfer solutions and products through our Lloyd’s and company market platforms operating from…” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Apolloapollounderwriting.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 268 contacts → |
“Apollo was launched in 2009 to provide clients and brokers with an agile and entrepreneurial insurance partner.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | INIGOinigoinsurance.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 257 contacts → |
“In an industry often shaped by legacy and complexity, Inigo was built to be different.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Specialist Risk Groupspecialistrisk.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 249 contacts → |
“Specialist Risk Group (SRG) brings together individuals and businesses from across the world, who are united in our pursuit of specialism.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Atriumatrium-uw.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 234 contacts → |
“Atrium is a leading (re)insurance group at Lloyd's, the world's specialist insurance market.” Recorded description excerpt · September 16, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 207 company matches
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Reinsurance underwriting companies: dataset insights
September 16, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
205 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 207 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 16, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for reinsurance underwriting companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many reinsurance underwriting companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 207 matching company records, 29,337 tracked contacts and 13,784 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 16, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 reinsurance underwriting companies based in the United Kingdom. Snapshot: September 16, 2026. https://revenuebase.ai/companies/reinsurance-underwriting-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Reinsurance underwriting companies based in Argentina
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