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The 100 largest Insurance companies in the United Kingdom

Tamtam tracks 679 Insurance companies headquartered in the United Kingdom. This list ranks the 100 largest by number of employees on LinkedIn, led by Aviva, Howden and AXA XL. Their median headcount is 864. Half of them were founded in 1994 or later. The most common headquarters are London (55) and Manchester (2).

πŸ‡¬πŸ‡§ United Kingdom100 companiesUpdated Oct 10, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Avivaaviva.com

This company prioritizes their people, striving to create an inclusive workplace with market-leading benefits for employees and a strong connection to customers and communities

Insurance πŸ‡¬πŸ‡§ London 36,000 1696
2
Howdenhowdengroupholdings.com

Employee-owned insurance group specializing in broking, reinsurance, underwriting, risk consultancy, and employee benefits with global expertise.

Insurance πŸ‡¬πŸ‡§ London 15,000 1994
3
AXA XLaxaxl.com

Specializing in solving complex risks, this division provides innovative insurance solutions for mid-sized companies, multinational corporations, and individuals

Insurance πŸ‡¬πŸ‡§ Hamilton 10,917 n/a
4
RSAintactinsurance.co.uk

A multinational insurer with a 300-year heritage, operating across Europe with significant businesses in the UK, Ireland, and Luxembourg Employing over 4,500 people

Insurance πŸ‡¬πŸ‡§ London 8,918 n/a
5
Allianz UKallianz.co.uk

Global financial services provider offering commercial and personal insurance products through brokers, focusing on employee growth, diversity, and sustainability for a better future

Insurance πŸ‡¬πŸ‡§ Guildford 8,735 n/a
6
Direct Line Groupdirectlinegroupcareers.com

Insurance services integration into Aviva plc, focusing on providing updates and news through Aviva's communication channels.

Insurance πŸ‡¬πŸ‡§ Bromley 5,968 n/a
7
NFU Mutualnfumutual.co.uk

Providing personalized insurance, life assurance, investments, and pensions with strong community relationships and customer-focused mutual business model.

Insurance πŸ‡¬πŸ‡§ Stratford-upon-Avon 5,693 1910
8
Daviesdavies-group.com

Specialist professional services and technology firm providing risk management, business process optimization, and digital transformation solutions to insurance, regulated, and global businesses

Insurance πŸ‡¬πŸ‡§ London 5,693 n/a
9
Hastings Directhastingsdirectcareers.com

Fast-growing UK insurance provider offering car, van, bike, and home insurance with digital focus, strong partnerships, and customer retention.

Insurance πŸ‡¬πŸ‡§ East Sussex 3,492 n/a
10
PIB Grouppibgroup.co.uk

A specialist insurance solutions provider in the UK market and beyond, offering commercial and personal lines products through acquisitions and expertise

Insurance πŸ‡¬πŸ‡§ London 3,023 2015
11
Gallagher Reajg.com

Provides strategic reinsurance brokerage services using data analytics to meet clients' unique risk transfer and capital access needs worldwide.

Insurance πŸ‡¬πŸ‡§ London 2,947 n/a
12
Howden Insurance Brokers Limitedhowdengroup.com

A leading insurance broker providing risk consulting and employee benefits advice, with specialized teams serving clients worldwide Employee-owned, part of a global broking group

Insurance πŸ‡¬πŸ‡§ London 2,797 1994
13
Beazleybeazley.com

Specialist insurer offering high standards in underwriting and claims globally Market leaders in cyber, management liability, professional indemnity, and more

Insurance πŸ‡¬πŸ‡§ London 2,726 1986
14
Liberty Specialty Marketslibertyspecialtymarkets.com

Global provider of specialty and commercial insurance and reinsurance products with 1,900 employees in 60 offices worldwide, backed by a Fortune 100 company for financial strength

Insurance πŸ‡¬πŸ‡§ London 2,536 1994
15
Lloyd'slloyds.com

Global marketplace connecting underwriters and brokers to provide insurance and reinsurance solutions through collective intelligence and risk-sharing expertise.

Insurance πŸ‡¬πŸ‡§ London 2,501 1688
16
Markerstudy Groupmarkerstudy.com

Specialist in niche motor insurance products targeting unique customer segments, leveraging expert underwriting and strong broker relationships.

Insurance πŸ‡¬πŸ‡§ Sevenoaks 2,498 2001
17
AXIS (AXIS Capital)axiscapital.com

specialty insurer and reinsurer providing tailored insurance and reinsurance solutions globally, focusing on collaboration, diversity, and responsible business practices

Insurance πŸ‡¬πŸ‡§ Pembroke 2,493 n/a
18
SunLife UKsunlife.co.uk

Providing support and services tailored for individuals aged 50 and above to enhance life quality and enjoyment.

Insurance πŸ‡¬πŸ‡§ Bristol 2,164 1810
19
Bupa Globalbupaglobal.com

Provides premium international health insurance plans with holistic wellness focus, continuous service improvement, and coverage at home or abroad.

Insurance πŸ‡¬πŸ‡§ Brighton 1,994 1971
20
XL Catlinaxaxl.com

Offers insurance and reinsurance, providing innovative risk solutions with advanced analytics and technology for diverse business challenges.

Insurance πŸ‡¬πŸ‡§ Hamilton 1,961 n/a
21
HomeServe UKhomeserve.co.uk

A leading UK home assistance provider with over one and a half million customers, offering services in plumbing, drainage, electrics, and heating through their own nationwide network of engineers

Insurance πŸ‡¬πŸ‡§ Walsall 1,957 1993
22
CFCcfc.com

Specialist insurance provider leading in cyber risk, utilizing technology and data science for faster underwriting and protection of global businesses

Insurance πŸ‡¬πŸ‡§ London 1,896 1999
23
Charles Taylorcharlestaylor.com

Global provider of insurance services, claims management, and technology solutions specializing in complex cases with expert technical support.

Insurance πŸ‡¬πŸ‡§ London 1,886 1884
24
Ageas UKageas.co.uk

One of the largest car and home insurers in the UK, part of an international group, with over 3 million customers, offering excellent insurance cover and customer service

Insurance πŸ‡¬πŸ‡§ Eastleigh 1,868 1824
25
Atlanta Groupatlantagroup.co.uk

Provides strategic consulting, business development, and operational improvement services to help companies enhance performance and achieve growth objectives.

Insurance πŸ‡¬πŸ‡§ Manchester 1,722 n/a
26
Allied Worldalliedworldinsurance.com

Global provider of innovative property, casualty, specialty insurance and reinsurance solutions with strong capital and worldwide client support.

Insurance πŸ‡¬πŸ‡§ Hamilton 1,718 2001
27
Utmost Grouputmostgroup.com

A leading provider of insurance and savings solutions with a focus on international life assurance, wealth and corporate solutions, and UK life consolidation

Insurance πŸ‡¬πŸ‡§ London 1,697 2013
28
Independent Agentww1.directionsintravel.co.uk

Established in 1989, Directions offers personalized one-to-one travel services with over 50 years of experience, prioritizing attention to detail and exceptional customer service

Insurance πŸ‡¬πŸ‡§ Malton 1,574 n/a
29
BMS Groupbmsgroup.com

Specialist independent insurance brokerage offering tailored wholesale, reinsurance, direct insurance, and capital advisory solutions worldwide with expert teams.

Insurance πŸ‡¬πŸ‡§ London 1,571 1980
30
QBE Europeqbeeurope.com

International insurer and reinsurer offering tailored commercial, personal, and specialty insurance products with strong local expertise across multiple global markets.

Insurance πŸ‡¬πŸ‡§ London 1,517 1886
31
Price Forbespriceforbes.com

Global specialty insurance broker with offices worldwide, working closely with clients to provide tailored solutions, now part of the Ardonagh Group

Insurance πŸ‡¬πŸ‡§ London 1,514 1893
32
Innovation Group UKinnovation.group

Global claims specialists offering end-to-end solutions in motor and property lines to insurers, brokers, MGA's, and self-insured entities with advanced technology and supplier network

Insurance πŸ‡¬πŸ‡§ Whiteley 1,496 1999
33
MS Amlinglobal.msamlin.com

A leading global specialty commercial insurer and reinsurer, providing insurance cover for commercial enterprises and reinsurance protection worldwide

Insurance πŸ‡¬πŸ‡§ London 1,484 2000
34
NHBCnhbc.co.uk

A leading provider of warranty and insurance for new homes in the UK, ensuring construction quality and protecting homeowners with expert assessment and inspection services

Insurance πŸ‡¬πŸ‡§ Milton Keynes 1,426 1936
35
Miller Insurance Services LLPmiller-insurance.com

Leading independent insurance broking firm providing specialist (re)insurance services internationally, focusing on integrity, expertise, and client trust.

Insurance πŸ‡¬πŸ‡§ London 1,191 1902
36
Cigna Healthcare International Healthcignaglobal.com

International healthcare provider offering expert care to improve people's well-being at every stage of life Promoting holistic health and well-being through informative content

Insurance πŸ‡¬πŸ‡§ Greenock 1,174 n/a
37
Ascot Groupascotgroup.com

Global specialty insurance and reinsurance group offering property and casualty products, underwriting, and claims services through Lloyd’s and Bermuda platforms.

Insurance πŸ‡¬πŸ‡§ Bermuda 1,127 2001
38
First Centralfirstcentralgroup.com

Insurance group using technology and data to reduce risk, prevent fraud, and offer competitive insurance products through innovative underwriting and brokering.

Insurance πŸ‡¬πŸ‡§ Haywards Heath 1,122 2008
39
esure Groupesure.com

A leading personal lines insurer providing car, home, and travel insurance through digital innovation, exceptional service, and commitment to environmental sustainability and community impact

Insurance πŸ‡¬πŸ‡§ Reigate 1,101 2000
40
ERSers.com

Specialist motor insurer in the UK with A+ rating, catering to unique insurance needs through partnerships with brokers Passionate about protecting what matters most

Insurance πŸ‡¬πŸ‡§ London 1,073 1946
41
CovΓ©a Insurancecoveainsurancehub.co.uk

A leading UK underwriting business operating across multiple product lines with a focus on financial reassurance, excellent service, and recognition in the industry

Insurance πŸ‡¬πŸ‡§ Halifax 1,071 2012
42
RenaissanceRerenre.com

Provide innovative reinsurance services managing risks from natural disasters, climate change, cyber threats, supporting clients and communities during crises.

Insurance πŸ‡¬πŸ‡§ Pembroke 1,066 1993
43
Canopius Groupcanopius.com

Global specialty insurer and reinsurer with operations in multiple countries, including Lloyd's Syndicates, US surplus lines, and Bermuda-based reinsurance Emphasizes collaboration, innovation, and diversity

Insurance πŸ‡¬πŸ‡§ 22 Bishopsgate 1,016 2003
44
DUAL Groupdualgroup.com

Global underwriting business offering diverse insurance products and services across 21 countries, empowering partners with innovative solutions and entrepreneurial spirit.

Insurance πŸ‡¬πŸ‡§ London 986 n/a
45
Markel Internationalmarkel.com

Global insurance operations offering specialty, international, reinsurance, program services, and insurance-linked securities with tailored solutions for complex risks.

Insurance πŸ‡¬πŸ‡§ London 971 1930
46
Brit Insurancebritinsurance.com

Providing innovative insurance solutions and risk management services to help businesses and individuals navigate an unpredictable and changing future.

Insurance πŸ‡¬πŸ‡§ London 946 1999
47
Howden Rehowdenre.com

A global reinsurance broker and risk advisor utilizing innovation and analytics to provide top client service, operating as part of Howden

Insurance πŸ‡¬πŸ‡§ London 942 2008
48
Pacific Life Repacificlifere.com

Specializes in life, critical illness, income protection, hospital cash, and retirement reinsurance with personalized, technology-driven solutions worldwide.

Insurance πŸ‡¬πŸ‡§ Bermuda 917 2008
49
Thomas Millerthomasmiller.com

An international provider of market-leading insurance services, specializing in managing mutual organizations, underwriting, claims handling, legal services, and investment management

Insurance πŸ‡¬πŸ‡§ London 894 1885
50
Cigna Insurance Servicescigna.co.uk

Insurance services provider that is no longer in business, providing contact details for ex-policyholders to make claims Visit their LinkedIn page for more information

Insurance πŸ‡¬πŸ‡§ Plymouth 864 2013
51
Jenstenjensten.co.uk

Providing brokerage services with strong advisory and product distribution expertise, serving commercial, corporate, and personal clients with superior outcomes.

Insurance πŸ‡¬πŸ‡§ London 860 n/a
52
Simply Businesssimplybusiness.co.uk

Provides an online platform for small business owners to compare, customize, and purchase insurance policies with expert agent support.

Insurance πŸ‡¬πŸ‡§ London 851 2000
53
Pension Insurance Corporation plcpensioncorporation.com

Provides secure retirement incomes through pension insurance buyouts, managing assets and liabilities for UK defined benefit pension schemes.

Insurance πŸ‡¬πŸ‡§ London 808 2006
54
Amwins Global Risksamwins.com

Specialty insurance and reinsurance broker with global reach, providing risk management solutions and coverage across more than 150 countries.

Insurance πŸ‡¬πŸ‡§ London 802 1968
55
Chaucer Groupchaucergroup.com

Specialty insurance group providing tailored (re)insurance solutions globally through Lloyd's of London and company markets, backed by China Re Group

Insurance πŸ‡¬πŸ‡§ London 798 1922
56
Brown & Brown UKus.bbrown.com

Providing specialized insurance brokerage and risk management services across personal, commercial, wholesale, and specialty markets in the UK and Ireland.

Insurance πŸ‡¬πŸ‡§ London 792 2013
57
Kiki-insurance.com

Ki leverages technology and data to streamline risk placement at Lloyd’s of London, providing instant underwriting decisions and expert assistance

Insurance πŸ‡¬πŸ‡§ London 786 2020
58
Tokio Marine HCC Internationaltmhcc.com

Specialty insurance group offering coverage in 180 countries with expertise in over 100 classes Known for innovative solutions and industry-leading experts

Insurance πŸ‡¬πŸ‡§ London 775 n/a
59
Tyserstysers.com

A leading UK insurance broker with expertise in specialist divisions, serving clients in over 100 countries with a focus on client satisfaction and forward-thinking solutions

Insurance πŸ‡¬πŸ‡§ London 770 1821
60
Tokio Marine Kilntmkiln.com

Specialist international insurer, part of a global insurance group, offering innovative products and specialized underwriting services to protect against complex risks

Insurance πŸ‡¬πŸ‡§ London 764 1880
61
Swinton Groupswinton.co.uk

Providing a wide range of insurance products including car, home, commercial, and taxi insurance with personalized customer service and support.

Insurance πŸ‡¬πŸ‡§ Salford 754 n/a
62
Ecclesiastical Insurance UKecclesiastical.com

Providing specialist insurance, expert risk management, and award-winning service to clients in faith, heritage, education, schemes, and real estate sectors.

Insurance πŸ‡¬πŸ‡§ Gloucester 740 1887
63
InsurTech Labbiaster.com

An insurance marketing agency that provides high performance marketing and lead generation services for businesses distributing insurance products

Insurance πŸ‡¬πŸ‡§ London 736 n/a
64
Clear Groupthecleargroup.com

Specialist insurance group offering retail, MGAs, broker networks, technology, and solutions with a focus on ethics and sustainability.

Insurance πŸ‡¬πŸ‡§ London 728 2001
65
Marsh Commercialmarshcommercial.co.uk

Provides UK insurance brokerage services with global backing, combining expertise, personal service, and access to broad insurance products.

Insurance πŸ‡¬πŸ‡§ London 718 1989
66
Neilson Financial Servicesneilsonfs.com

An international life insurance provider with offices in multiple countries, focused on helping families secure financial protection for their loved ones

Insurance πŸ‡¬πŸ‡§ Windsor 706 n/a
67
The Ardonagh Groupardonagh.com

The company is the UK's largest independent insurance distribution platform, offering a diverse range of insurance products and services globally

Insurance πŸ‡¬πŸ‡§ London 673 n/a
68
Pro Globalpro-global.com

Specialist insurance experts simplifying, consulting, outsourcing, and auditing complex insurance operations for brokers, insurers, reinsurers, and insurtechs globally.

Insurance πŸ‡¬πŸ‡§ London 649 1993
69
NorthStandardnorth-standard.com

A global marine insurer offering P&I, war risks, hull, machinery, and ancillary insurance to over 240 million GT of owned and chartered tonnage

Insurance πŸ‡¬πŸ‡§ Newcastle upon Tyne 647 1860
70
SiriusPointsiriuspt.com

Global underwriter providing property, casualty, accident, and health insurance and reinsurance solutions with strong financial ratings and strategic partnerships.

Insurance πŸ‡¬πŸ‡§ Corporate Headquarters: Bermuda 631 n/a
71
Rothesayrothesay.com

A UK pensions insurance specialist, Rothesay protects over 840,000 members' pensions with Β£48 billion in assets under management

Insurance πŸ‡¬πŸ‡§ London 615 2007
72
Acorn Insurance and Financial Services Limitedacorninsure.co.uk

Specialist provider of car, taxi, and home insurance policies throughout the United Kingdom with over forty years of insurance industry experience.

Insurance πŸ‡¬πŸ‡§ Liverpool 607 1982
73
CNA Hardycnahardy.com

Specialist commercial insurance provider offering innovative products for businesses of all sizes globally, backed by over 120 years of experience

Insurance πŸ‡¬πŸ‡§ London 600 n/a
74
McGill and Partnersmcgillpartners.com

A boutique risk solutions business founded in 2019 by industry leaders, specializing in creating specialist transactions to manage risk for clients globally

Insurance πŸ‡¬πŸ‡§ London 598 2019
75
Innovation Groupinnovation.group

End-to-end claims handling with 24/7 customer service, repairer network, and streamlined management to save time and money while delivering exceptional service

Insurance πŸ‡¬πŸ‡§ London 579 n/a
76
AND-Eand-e.com

provider of motor and mobility insurance products and services across Europe and Africa, specializing in connected insurance for Toyota customers

Insurance πŸ‡¬πŸ‡§ London 571 n/a
77
Chartered Insurance Institutecii.co.uk

A professional body promoting trust in insurance and financial planning worldwide, offering qualifications and oversight for members in over 150 countries

Insurance πŸ‡¬πŸ‡§ London 571 1912
78
AmTrust Internationalamtrustinternational.com

A global insurance provider with expertise in niche risks, offering comprehensive risk solutions worldwide through innovation, flexibility, and long-term partnerships

Insurance πŸ‡¬πŸ‡§ London 558 2007
79
The Fidelis Partnershipfidelispartnership.com

Provider of specialty insurance and reinsurance products globally through subsidiaries, rated A (Excellent) by A.M. Best Company.

Insurance πŸ‡¬πŸ‡§ Pembroke 549 2022
80
PIB Insurance Brokerspib-insurance.com

Leading insurance broker offering bespoke solutions for businesses and individuals, specializing in commercial and private client insurances with access to risk management services

Insurance πŸ‡¬πŸ‡§ London 546 2015
81
Willis Towers Watson Health and Benefitswtw-healthandbenefits.co.uk

A leading UK provider of employee healthcare and risk management services, offering in-house medical expertise to large companies for improved health and absence management

Insurance πŸ‡¬πŸ‡§ Wincham 530 1986
82
NIGnig.com

A company working in collaboration with Direct Line Group to achieve goals and deliver results

Insurance πŸ‡¬πŸ‡§ London 502 1894
83
Endurancesompo-intl.com

Global specialty provider of insurance and reinsurance, now part of Sompo International as of March 28, 2017 Visit Sompo International's LinkedIn page for more information

Insurance πŸ‡¬πŸ‡§ Pembroke 500 2001
84
WPA Health Insurancewpa.org.uk

Providing personalised, award-winning health insurance solutions for individuals, families, and businesses, combining expert service with digital innovation.

Insurance πŸ‡¬πŸ‡§ Taunton 499 1901
85
Policy Expertpolicyexpert.co.uk

Providing accessible and easy-to-understand home, car, and pet insurance trusted by over 1.5 million customers with excellent ratings.

Insurance πŸ‡¬πŸ‡§ 110 Bishopsgate 497 2010
86
Towergate Insurance Brokerseverywhen.co.uk

Providing tailored insurance solutions and risk management advice for businesses across various sectors and private individuals throughout Europe.

Insurance πŸ‡¬πŸ‡§ London 492 1997
87
Solus - an Aviva companysolusarc.co.uk

Solus prioritizes individual needs to help customers overcome challenges and return to their version of 'normal,' whether by resolving issues or restoring joy

Insurance πŸ‡¬πŸ‡§ Norwich 491 1997
88
HSB | UK and Irelandmunichre.com

Specialist provider of engineering insurance and inspection services covering construction, equipment breakdown, cyber risks, leveraging over 150 years of expertise.

Insurance πŸ‡¬πŸ‡§ Manchester 487 n/a
89
Aventum Groupaventumgroup.com

Global insurance group specializing in underwriting and broking, creating innovative schemes, nurturing relationships, and challenging industry standards worldwide.

Insurance πŸ‡¬πŸ‡§ London 475 n/a
90
Partners&.partnersand.com

Specialists in insurance advisory, employee wellbeing, and risk management, providing advice and solutions for businesses and private clients regulated by the Financial Conduct Authority

Insurance πŸ‡¬πŸ‡§ High Wycombe 463 n/a
91
Monument Re Groupmonumentregroup.com

Reinsurance company specializing in asset-based risk assumption and efficient operation of reinsurance portfolios, backed by major global shareholders.

Insurance πŸ‡¬πŸ‡§ Hamilton 438 2017
92
Car Care Plancarcareplan.com

Provider of vehicle and cosmetic warranties, working with manufacturers and dealers, offering after-sales motoring programs and repair services globally.

Insurance πŸ‡¬πŸ‡§ Thornbury 435 1976
93
Animal Friendsanimalfriends.co.uk

Provides award-winning, affordable pet insurance policies while donating millions to animal welfare charities and continuously improving customer and colleague experiences.

Insurance πŸ‡¬πŸ‡§ Amesbury 433 1998
94
Acrisure Reacrisure.com

Acrisure Re is a global re/insurance intermediary and corporate advisor offering innovative capital, risk, and program solutions with a tech-enabled approach

Insurance πŸ‡¬πŸ‡§ London 416 n/a
95
Global Aerospaceglobal-aero.com

Providing aviation insurance solutions with financial stability, innovative technology, and global presence to protect and empower industry stakeholders.

Insurance πŸ‡¬πŸ‡§ London 415 1924
96
Travelers Europetravelers.co.uk

Industry-leading organization with 160+ years of experience, offering specialist underwriting and claims services to meet customers' needs with first-class service

Insurance πŸ‡¬πŸ‡§ London 410 1865
97
Bluefin - Page Closedlinkedin.com

Stay up to date with the latest news and updates from a company specializing in commercial insurance and risk management solutions

Insurance πŸ‡¬πŸ‡§ Chipping Sodbury 409 n/a
98
Pinnacle Pet Grouppinnaclepetgroup.com

Development and distribution of pet and protection insurance products through partnerships and direct online channels with a digital operating model.

Insurance πŸ‡¬πŸ‡§ London 404 1971
99
LPGlegalprotectiongroup.co.uk

A team of legal protection professionals providing innovative products underwritten by A-Rated insurers with a focus on top-notch service

Insurance πŸ‡¬πŸ‡§ Rudgeway 398 2016
100
Ardonagh Specialtyardonagh.com

Holding company for independent brokers offering wholesale, specialty, reinsurance, and international broking solutions with global market expertise.

Insurance πŸ‡¬πŸ‡§ London 397 n/a

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 10, 2026.

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