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100 leading financial services firms in London

Tamtam tracks 1,682 financial services firms headquartered in London. This list ranks the 100 largest by number of employees on LinkedIn, led by HSBC, Aon and Barclays. Their median headcount is 2,622. Half of them were founded in 1989 or later.

πŸ‡¬πŸ‡§ London100 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
HSBChsbc.com

A global financial services organization with a network spanning 63 countries, serving individuals, companies, and governments, creating opportunities for customers worldwide

Financial Services πŸ‡¬πŸ‡§ London 197,879 n/a
2
Aonaon.com

The company provides advice and solutions to clients worldwide, helping them make better decisions to protect and grow their business

Financial Services πŸ‡¬πŸ‡§ London 93,574 n/a
3
Barclayshome.barclays

A British universal bank with global presence, offering consumer banking, payments, corporate and investment banking services, supported by technology and operational solutions

Financial Services πŸ‡¬πŸ‡§ London 82,417 n/a
4
Standard Charteredsc.com

An international banking group with a presence in 53 markets, driving commerce and prosperity through diversity and values Listed on London and Hong Kong Stock Exchanges

Banking πŸ‡¬πŸ‡§ London 79,401 n/a
5
Sainsbury'ssainsburys.jobs

A leading UK retailer with over 1400 stores and a strong digital presence, offering affordable, greener products and convenient financial services to customers

Retail πŸ‡¬πŸ‡§ London 68,549 1869
6
Lloyds Banking Grouplloydsbankinggroup.com

This company focuses on creating a more sustainable and inclusive future in the financial services industry, while supporting customers' changing needs

Financial Services πŸ‡¬πŸ‡§ London 57,702 n/a
7
WTWwtwco.com

Offering data-driven solutions in people, risk, and capital areas, leveraging global expertise to enhance strategy, resilience, workforce motivation, and performance

Financial Services πŸ‡¬πŸ‡§ London 55,656 n/a
8
John Lewis Partnershipjlpjobs.com

Employee-owned business operating department stores and supermarkets focused on quality service, retail innovation, and shared responsibility among partners for collective success and growth.

Retail πŸ‡¬πŸ‡§ London 36,517 n/a
9
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
10
LSEGlseg.com

Provides financial indexing, benchmarking, analytic services, technology solutions, and integrated market infrastructure across data, capital markets, and post-trade.

Financial Services πŸ‡¬πŸ‡§ London 25,298 n/a
11
Santander UKsantander.co.uk

Providing personal and commercial financial products and services to millions of customers, fostering diversity and a positive workplace culture.

Banking πŸ‡¬πŸ‡§ London 21,000 n/a
12
Bupa UKbupa.co.uk

International healthcare company dedicated to helping people live longer, healthier, happier lives by providing quality healthcare services to over 38 million customers worldwide

Hospitals and Health Care πŸ‡¬πŸ‡§ London 20,537 1947
13
Revolutrevolut.com

A fintech company on a mission to provide customers with more visibility, control, and freedom over their money through innovative products

Financial Services πŸ‡¬πŸ‡§ London 18,462 2015
14
Post Office Ltdpostoffice.co.uk

operates largest UK retail network with 11,500 branches and a major digital presence, focusing on customer service and innovation

Retail πŸ‡¬πŸ‡§ London 17,058 n/a
15
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
16
Wisewise.com

Platform enabling individuals and businesses to hold multiple currencies, transfer money internationally, and spend abroad with low fees.

Financial Services πŸ‡¬πŸ‡§ London 11,769 2011
17
Barclays UKsearch.jobs.barclays

A company focused on helping individuals progress in their lives through financial services, digital innovation, career guidance, and customer-centric approach

Banking πŸ‡¬πŸ‡§ London 9,925 1690
18
Fidelity Internationalfidelityinternational.com

Offers global investment solutions, services, and retirement expertise to diverse clients, managing substantial assets for long-term financial futures.

Financial Services πŸ‡¬πŸ‡§ London 9,884 1969
19
Investecinvestec.com

Provides global banking and asset management services, creating and managing wealth through specialized financial solutions and insights for diverse international clients.

Financial Services πŸ‡¬πŸ‡§ London 9,732 1974
20
Apex Group Ltd (UK & Ireland)apexgroup.com

A global financial services provider with offices in over 50 countries, offering a wide range of services to asset managers, capital markets, and family offices

Financial Services πŸ‡¬πŸ‡§ London 9,281 2003
21
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
22
Legal & Generallegalandgeneral.com

Provides financial services through asset management, pension risk transfers, and retail savings while investing capital responsibly to deliver long-term shareholder returns.

Financial Services πŸ‡¬πŸ‡§ London 7,832 n/a
23
FNZfnz.com

We provide a global wealth management platform to help financial institutions and wealth managers simplify operations and enable millions to invest

Financial Services πŸ‡¬πŸ‡§ London 6,270 n/a
24
Lloyds Banklloydsbank.com

A UK-based bank focusing on serving the needs of individuals and businesses, prioritizing what truly matters in life Connect with us online

Banking πŸ‡¬πŸ‡§ London 5,996 n/a
25
SS&C GlobeOpssctech.com

Global provider of cloud-based fund services and technology for hedge funds, private equity, and asset managers, offering outsourcing support for operational efficiency and risk reduction

Financial Services πŸ‡¬πŸ‡§ London 5,416 2000
26
Monzomonzo.com

A mobile-first bank focused on solving problems, treating customers fairly, and being transparent to make banking better

Financial Services πŸ‡¬πŸ‡§ London 5,267 2015
27
Schrodersschroders.com

Manages investments globally for institutions, intermediaries, and individuals, focusing on active management and sustainability to create prosperity and resilient outcomes.

Financial Services πŸ‡¬πŸ‡§ London 4,905 1804
28
EBRDebrd.com

The company focuses on building sustainable economies, supporting countries affected by war, promoting equality, and leveraging digital technology for positive change

Banking πŸ‡¬πŸ‡§ London 4,789 1991
29
TSB Banktsb.co.uk

Innovative banking solution providing simple, customer-centric services with a commitment to community, serving 5 million customers with over 6,000 employees

Banking πŸ‡¬πŸ‡§ London 4,161 1812
30
Royal Londonroyallondon.com

A purpose-driven mutual company focused on protecting and investing for the future, promoting inclusivity, diversity, and a positive workplace environment for all

Financial Services πŸ‡¬πŸ‡§ London 4,058 1861
31
Man Groupman.com

Global firm managing alternative investments, seeking outperformance for clients through systematic, discretionary, and solutions-based strategies across various asset classes.

Investment Management πŸ‡¬πŸ‡§ London 3,987 1783
32
M&Gmandg.com

An international savings and investments business managing assets for retail and institutional clients, with a focus on helping people grow their savings responsibly

Financial Services πŸ‡¬πŸ‡§ London 3,717 n/a
33
Janus Henderson Investorsjanushenderson.com

The company is dedicated to helping clients achieve financial success by offering differentiated insights, disciplined investments, and world-class service

Financial Services πŸ‡¬πŸ‡§ London 3,515 n/a
34
Domestic & Generaldomesticandgeneral.com

Protection, repair, and care for household appliances including fridges, washing machines, TVs, and boilers, ensuring reliable home operation.

Financial Services πŸ‡¬πŸ‡§ London 3,376 1912
35
Tidetide.co

Leading fintech providing UK and Indian SMEs with business accounts, banking services, and admin tools Award-winning with global recognition and funding

Financial Services πŸ‡¬πŸ‡§ London 3,323 2015
36
M-KOPAm-kopa.com

Affordable smartphone and e-motorbike financing with embedded digital financial services, leveraging AI-driven credit analytics for emerging market customers.

Financial Services πŸ‡¬πŸ‡§ London 3,301 2011
37
Starlingstarlingbank.com

This company is a digital bank offering fast technology, fair service, and honest values, focused on solving customer problems and building sustainable solutions

Banking πŸ‡¬πŸ‡§ London 3,231 2014
38
Barclaycardhome.barclays

A global payment business offering flexible payment solutions, short-term credit, and innovative contactless and mobile payment schemes to consumers and businesses worldwide

Financial Services πŸ‡¬πŸ‡§ London 3,083 n/a
39
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
40
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
41
Metro Bank (UK)metrobankonline.co.uk

Award-winning, customer-centric bank offering innovative banking services, open longer hours, with a strong focus on community, hiring for attitude, and supporting customers and colleagues

Banking πŸ‡¬πŸ‡§ London 2,895 2010
42
Howden Insurance Brokers Limitedhowdengroup.com

Leading provider of insurance broking, risk consulting, and employee benefits advice, serving diverse clients globally with specialist teams and employee ownership.

Insurance πŸ‡¬πŸ‡§ London 2,875 1994
43
ICAPtpicap.com

A leading markets operator providing electronic execution and information services for wholesale market participants, facilitating capital flow and supporting borrowing needs

Financial Services πŸ‡¬πŸ‡§ London 2,750 n/a
44
IG Groupiggroup.com

An innovative global fintech company empowering clients to pursue financial freedom through award-winning products and platforms across 19,000 financial markets

Financial Services πŸ‡¬πŸ‡§ London 2,734 1974
45
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
46
eToroetoro.tw

Social investment platform connecting 40 million users, offering investments in stocks, digital assets, and CFDs (excluding US where cryptoassets only).

Financial Services πŸ‡¬πŸ‡§ London 2,719 2007
47
Rathbonesrathbones.com

Providing investment and wealth management services to private clients, charities, trustees, and professional partners with a focus on responsibility.

Financial Services πŸ‡¬πŸ‡§ London 2,695 1742
48
Vitalityvitality.co.uk

This company offers health insurance, life insurance, and investments that reward healthy lifestyle choices, leading to a longer, healthier, and financially secure life

Financial Services πŸ‡¬πŸ‡§ London 2,671 2004
49
Close Brothersbit.ly

UK specialist banking group providing lending and deposit taking through commercial finance for SMEs, motor and insurance retail finance, and property development funding.

Financial Services πŸ‡¬πŸ‡§ London 2,632 1878
50
Saga plc.saga.co.uk

A dynamic company focused on providing exceptional experiences for people over 50, driving positive change in markets and communities

Financial Services πŸ‡¬πŸ‡§ London 2,622 1951
51
Barclays Corporate Bankingbarclayscorporate.com

This company offers corporate banking services to UK businesses with annual turnover above Β£65 million, providing insights and inspiration on social media

Banking πŸ‡¬πŸ‡§ London 2,600 1690
52
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
53
Barclays Wealth Managementprivatebank.barclays.com

Providing expert wealth management services through a regional network of financial experts to help clients manage wealth effectively.

Financial Services πŸ‡¬πŸ‡§ London 2,528 n/a
54
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
55
Phoenix Groupthephoenixgroup.com

The company is the UK's largest long term savings and retirement business, managing 'heritage' books of business and offering opportunities for development

Financial Services πŸ‡¬πŸ‡§ London 2,468 n/a
56
Qube Research & Technologiesqube-rt.com

Global quant and systematic investment manager using technology and data for scientific approach to investing, driving innovation for high quality returns Multiple open positions available

Financial Services πŸ‡¬πŸ‡§ London 2,393 2018
57
London Stock Exchangelondonstockexchange.com

Global financial marketplace providing extensive access to capital markets and liquidity across multiple asset classes for international businesses, governments, and investment funds.

Financial Services πŸ‡¬πŸ‡§ London 2,358 1698
58
L&G – Asset Managementam.landg.com

Asset management firm focusing on responsible investing, client partnership, innovation across public and private assets, and global professional collaboration.

Financial Services πŸ‡¬πŸ‡§ London 2,339 n/a
59
AXA UKaxa.co.uk

Specializes in insurance products protecting homes, cars, businesses, and offers affordable healthcare plans for UK and international customers.

Financial Services πŸ‡¬πŸ‡§ London 2,289 n/a
60
S&Wswgroup.com

Financial and professional services firm specializing in wealth management, accountancy, tax advisory, and investment management solutions.

Professional Services πŸ‡¬πŸ‡§ London 2,218 1881
61
Collinson Groupcollinsongroup.com

Global company specializing in travel solutions, airport experiences, loyalty programs, insurance, and customer engagement for millions of consumers worldwide

Consumer Services πŸ‡¬πŸ‡§ London 2,108 1989
62
Evelyn Partnersevelyn.com

A leading UK wealth management and professional services group providing good advice to individuals and businesses for almost 200 years

Financial Services πŸ‡¬πŸ‡§ London 2,048 n/a
63
Eburyebury.com

Specializes in international payments, foreign exchange, trade finance, and cash management solutions primarily for SMEs and mid-sized companies.

Financial Services πŸ‡¬πŸ‡§ London 2,025 2009
64
RBC Brewin Dolphinbrewin.co.uk

Providing personalised financial planning, investment management, and specialist advice to individuals, advisers, businesses, and charities for wealth growth and protection.

Financial Services πŸ‡¬πŸ‡§ London 1,967 1762
65
Traditiontradition.com

Provides brokerage and market data services across capital and commodity markets, facilitating transactions in money markets, interest rates, equities, and energy derivatives.

Financial Services πŸ‡¬πŸ‡§ London 1,948 1959
66
Quilterquilter.com

A UK wealth management company dedicated to creating prosperity for present and future generations through high-quality investment products and services

Financial Services πŸ‡¬πŸ‡§ London 1,900 n/a
67
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
68
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
69
Ocorianocorian.com

A global provider of fund administration, capital markets, corporate, and compliance solutions for various clients, offering expertise, trust, and scale

Financial Services πŸ‡¬πŸ‡§ London 1,846 1971
70
M&G Investmentsmandg.com

Global asset manager with over 90 years of experience, offering a range of investment solutions across various asset classes for customers worldwide

Financial Services πŸ‡¬πŸ‡§ London 1,761 n/a
71
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
72
Ninety Oneninetyone.com

Independent global asset manager offering active strategies across equities, fixed income, multi-asset, and alternatives to institutions, advisors, and individual investors worldwide

Financial Services πŸ‡¬πŸ‡§ London 1,646 1991
73
Barclays Private Bankprivatebank.barclays.com

A premier private bank offering specialized investment, banking, lending, and wealth advisory services to high-net-worth clients globally with tailored opportunities and expert advice

Financial Services πŸ‡¬πŸ‡§ London 1,615 1690
74
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
75
CMC Marketscmcmarkets.com

Provides online trading and investing platforms with broad financial services, partnering with major organizations and innovating in fintech.

Financial Services πŸ‡¬πŸ‡§ London 1,517 1989
76
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
77
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
78
Trading 212trading212.com

A company focused on democratizing financial markets through innovative products, with a mission to enable everyone to build wealth Regulatory compliance ensures investor protection

Financial Services πŸ‡¬πŸ‡§ London 1,502 2004
79
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
80
NatWest Commercial and Institutionalnatwest.com

Provides global financial solutions including rates, currencies, and financing for corporates, banks, sovereigns, funds, and asset managers across various sectors.

Banking πŸ‡¬πŸ‡§ London 1,414 n/a
81
Motability Operations Ltdmo.co.uk

Providing affordable vehicle leasing and comprehensive support services to over 815,000 disabled customers across the UK for independent mobility.

Financial Services πŸ‡¬πŸ‡§ London 1,368 1978
82
OSTTRAosttra.com

A company specializing in post-trade solutions, fostering collaboration, innovation, and efficient processes for global financial markets across all asset classes

Financial Services πŸ‡¬πŸ‡§ London 1,360 2021
83
Aviva Investorsavivainvestors.com

Global asset management firm focusing on client integration, delivering tailored investment solutions across asset classes with disciplined risk management.

Financial Services πŸ‡¬πŸ‡§ London 1,349 2008
84
Barnett Waddinghambarnett-waddingham.co.uk

Providing expert consultancy in risk, pensions, investment, and insurance with trusted partnerships and innovative solutions for diverse clients.

Financial Services πŸ‡¬πŸ‡§ London 1,346 1989
85
Standard Life plcstandardlifeplc.com

Providing retirement planning services, leveraging expertise and influence to improve customers' retirement journeys and future financial security.

Financial Services πŸ‡¬πŸ‡§ London 1,342 n/a
86
Tullett Prebontpicap.com

A global interdealer broker facilitating trading activities in financial and energy sectors through various platforms, market data services, and award-winning brokerage solutions

Financial Services πŸ‡¬πŸ‡§ London 1,332 n/a
87
Isioisio.com

A leading financial services company challenging traditional thinking in pensions, benefits, and investment advice by providing expertise and innovative solutions

Financial Services πŸ‡¬πŸ‡§ London 1,250 2020
88
Octopusoctopusgroup.com

It is an entrepreneurial investment group focused on building businesses that address societal challenges, emphasizing stakeholder interests and sustainability.

Financial Services πŸ‡¬πŸ‡§ London 1,234 n/a
89
Interpathinterpath.com

Providing expertise and creative solutions for critical business decisions, guiding clients towards the right path quickly

Financial Services πŸ‡¬πŸ‡§ London 1,220 n/a
90
NewDaynewday.co.uk

This company helps people access credit responsibly through a variety of credit products, superior customer service, and data-driven decision-making

Financial Services πŸ‡¬πŸ‡§ London 1,203 2001
91
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
92
Pepper Advantagepepper-advantage.com

A global credit management company using technology and analytics to manage assets, make informed decisions, and guide clients towards positive outcomes

Financial Services πŸ‡¬πŸ‡§ London 1,187 2012
93
Bestway Wholesalebestwaygroup.co.uk

Largest UK trade-only retailer offering diverse career opportunities across finance, marketing, logistics, communications, and various industry sectors.

Wholesale πŸ‡¬πŸ‡§ London 1,167 1976
94
Insight Investmentinsightinvestment.com

Global asset manager offering LDI, CDI, fixed income, and ESG-driven investment strategies for various clients, prioritizing meeting objectives over maximizing returns

Investment Management πŸ‡¬πŸ‡§ London 1,164 n/a
95
G-Researchgresearch.com

A leading quantitative research and technology firm tackling big questions in finance using machine learning and big data for predicting market movements

Financial Services πŸ‡¬πŸ‡§ London 1,153 2001
96
Brevan Howardbrevanhoward.com

Management of global macro alternative investments for institutional clients including sovereign wealth funds, pension plans, foundations, and endowments worldwide.

Investment Management πŸ‡¬πŸ‡§ London 1,114 n/a
97
JLT Groupmarsh.com

Company merged into Mercer, continuing consulting and solutions management services with focus on health, wealth, and career needs.

Business Consulting and Services πŸ‡¬πŸ‡§ London 1,090 n/a
98
HSBC Innovation Bankinghsbcinnovationbanking.com

Supporting innovators and investors worldwide with flexible banking solutions for startups, growth businesses, and investors, powering bold ideas and global opportunities

Financial Services πŸ‡¬πŸ‡§ London 1,087 2023
99
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
100
Hymans Robertsonhymans.co.uk

Providing independent pensions, investments, benefits, risk consulting, and technology solutions to employers, trustees, and financial institutions.

Financial Services πŸ‡¬πŸ‡§ London 1,060 1921

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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 24, 2026.

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