These large UK companies specialize in data and analytics across diverse sectors. RELX provides information-based analytics for professionals, LSEG offers financial indexing and analytic services, and Kantar is a global leader in marketing data. Clarivate delivers trusted intelligence in academia, life sciences, and intellectual property.
A clear pattern is the concentration of headquarters in London, with companies like Publicis Media, Smollan, and Apex Group Ltd (UK & Ireland) based there. Other significant players include AVEVA in Cambridge, which provides industrial software solutions, and EV in Norwich, specializing in well diagnosis for the energy sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 37,600 | ||||
| 2 | 25,298 | ||||
| 3 |
Kantarkantar.com
Global leader in marketing data and analytics with deep expertise, innovative technology, and insights to help clients understand people and drive growth worldwide |
24,976 | |||
| 4 |
Smollansmollan.com
Partners with brands and retailers, building solutions that drive growth and create opportunities at the point of purchase. |
13,502 | |||
| 5 |
Clarivateclarivate.com
A global information services provider connecting people and organizations to trusted intelligence in Academia & Government, Life Sciences & Healthcare, and Intellectual Property |
11,385 | |||
| 6 |
Publicis Mediapublicisgroupe.com
A global media company within Publicis Groupe, employing data-driven solutions and platform-based technologies to deliver client value and drive growth internationally |
11,033 | |||
| 7 |
Informainforma.com
Leading international business in events, digital services, and academic knowledge, connecting specialists worldwide to learn, know, and do more in their fields |
9,410 | |||
| 8 |
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 |
9,281 | |||
| 9 | 7,630 | ||||
| 10 |
Acuity Analyticsacuityanalytics.com
Provides bespoke research, analytics, and technology solutions to financial services, helping institutions operate efficiently and unlock human capital to drive revenue. |
7,619 | |||
| 11 |
TP ICAPtpicap.com
Specialist in connecting clients to liquidity and data solutions across financial and commodities markets with advanced technology and global presence. |
7,548 | |||
| 12 |
PHDphdmedia.com
Global media agency network combining data, technology, and human expertise to create innovative campaigns and transform brand experiences worldwide. |
5,700 | |||
| 13 | 5,696 | ||||
| 14 |
IONiongroup.com
Innovative company providing trading and workflow automation software to financial institutions, corporations, and governments, empowering decision-making and accelerating processes |
5,591 | |||
| 15 |
LSEG Data & Analyticslseg.com
A global provider of financial markets data and infrastructure, enabling customers to gain insights through data, feeds, analytics, and workflow solutions |
5,147 | |||
| 16 |
YouGovyougov.com
An international online research and analytics technology group providing unparalleled consumer insights for brands, media owners, and agencies worldwide |
4,691 | |||
| 17 |
Hexagon Manufacturing Intelligencehexagon.com
The company offers hardware and software solutions to empower makers to design, test, produce, and optimize products throughout the entire value chain |
4,300 | |||
| 18 |
Fitch Group, Inc.fitch.group
Global leader in financial information services with operations in 30+ countries Offers credit ratings, research, risk solutions, training, and venture investments Dual headquarters in London and New York |
4,203 | |||
| 19 |
Playtechplaytech.com
Leading software and services supplier for the gambling industry, offering omni-channel solutions for online, mobile, and retail operations, including financial trading. |
3,735 | |||
| 20 |
Worldpanelworldpanelbynumerator.com
Experts in global shopper and consumer behavior providing analytics for retail and marketing strategies, enabling smarter decisions for a better world |
3,437 | |||
| 21 |
Stats Performstatsperform.com
Global leader in sports technology providing unrivaled AI-powered sports data for media, tech, betting, and team performance solutions |
3,359 | |||
| 22 |
BAE Systems Digital Intelligencebaesystems.com
A global team of over 4,500 experts in digital, cyber, and intelligence, collaborating to collect and analyze complex data for governments and businesses |
3,252 | |||
| 23 |
Tolunatolunacorporate.com
Global leader providing advanced technology and comprehensive solutions for data-driven market research, leveraging AI and extensive global panels. |
3,218 | |||
| 24 |
Genius Sportsgeniussports.com
This company delivers technology and expertise to sports, betting, and media partners worldwide, enhancing data collection, fan engagement, and overall performance |
3,054 | |||
| 25 |
dunnhumbydunnhumby.com
Connects retailers and brands, applying AI-enabled science, software, and expertise to customer loyalty, media, and category management for business growth. |
2,990 | |||
| 26 |
Ocado Technologycareers.ocadogroup.com
Revolutionizing online retail with cutting-edge technology in robotics, IoT, cloud platforms, big data, and machine learning to create world-class systems |
2,894 | |||
| 27 |
Two Circlestwocircles.com
Management of extensive fan data to enhance audience engagement and increase revenue for leading sports and entertainment organizations worldwide. |
2,877 | |||
| 28 |
TradingViewtradingview.com
Social network and charting platform for traders and investors, used by 50 million+ users worldwide with open source charts used by financial giants |
2,761 | |||
| 29 |
ICAPtpicap.com
A leading markets operator providing electronic execution and information services for wholesale market participants, facilitating capital flow and supporting borrowing needs |
2,750 | |||
| 30 |
GlobalData Plcglobaldata.com
A leading information services company helps organizations and decision-makers predict the future, make informed decisions, and gain a competitive edge |
2,711 | |||
| 31 |
HM Land Registrygov.uk
This UK government department registers land and property ownership in England and Wales, safeguarding assets worth over 拢8 trillion |
2,709 | |||
| 32 |
Advantage Smollanadvantagesmollan.com
Local experts providing consistent service and strong client relationships, leveraging global insights, innovation, and technology for growth. |
2,706 | |||
| 33 | 2,661 | ||||
| 34 |
Wood Mackenziewoodmac.com
Provider of data, analytics, and consultancy services for renewables, energy, and natural resources sectors supporting investment decisions. |
2,472 | |||
| 35 |
Third Bridge Groupthirdbridge.com
A global investment research firm delivering unique insights to help investment firms make better decisions through a team of 1,200+ employees |
2,438 | |||
| 36 |
Keyloopkeyloop.com
Global automotive technology company delivering cutting-edge solutions for auto retailers and OEMs, connecting them to consumers through innovative technology and distinctive customer experiences |
2,435 | |||
| 37 |
Dialecticadialectica.io
A B2B information services firm connecting professionals with industry experts worldwide through a trusted knowledge-sharing platform, recognized for growth and workplace excellence |
2,400 | |||
| 38 |
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 |
2,393 | |||
| 39 |
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. |
2,358 | |||
| 40 |
Met Officemetoffice.gov.uk
A world leader in weather and climate services, with global coverage and ties to industries, government, media, and disaster contingency |
2,303 | |||
| 41 |
Euromonitor Internationaleuromonitor.com
Provides comprehensive global data analytics and research on markets, industries, economies, and consumers to support strategic business growth decisions. |
2,176 | |||
| 42 |
National Energy System Operatorneso.energy
Central organization managing energy systems, ensuring reliable, clean, affordable energy access, driving sustainable energy future globally. |
2,146 | |||
| 43 |
FD Technologiesfdtechnologies.com
A data-driven group that offers technology, services in capital markets, and predictive marketing solutions to drive organizations forward globally |
2,025 | |||
| 44 |
CACI Ltdcaci.co.uk
Provides data, marketing, IT solutions, software, consulting services, and managed services to public and private sector clients. Improves sales, marketing, operations, and reduces costs. |
2,025 | |||
| 45 |
Argus Mediaargusmedia.com
Provides price assessments, news, analytics, consulting, data tools, and conferences for global energy and commodity market transparency and decision-making. |
2,024 | |||
| 46 |
Clarksonsclarksons.com
Global maritime services company offering shipbroking, research, finance, digital tools, port services, and green advisory services for smarter, sustainable shipping solutions |
1,991 | |||
| 47 |
MICHELIN Connected Fleetconnectedfleet.michelin.com
Provide tools and data-driven recommendations to fleet operators for cost reduction, productivity improvement, driver safety, and sustainable fleet management. |
1,961 | |||
| 48 | 1,896 | ||||
| 49 |
Ipsos in the UKipsos.com
A global research firm passionate about understanding people, brands, and society, providing insightful knowledge to inspire impactful decision-making for clients |
1,697 | |||
| 50 |
Hawk-Eye Innovationshawkeyeinnovations.com
Innovative sports technology company specializing in officiating, production, tracking, and analytics tools to make sports fairer, safer, and more engaging |
1,641 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 51 |
CFcarnallfarrar.com
This company specializes in healthcare improvement through consulting, data services, and products for health systems and the life sciences industry |
1,499 | |||
| 52 |
XPS Groupxpsgroup.com
Leading UK pension consulting and administration business providing services to over 1,500 schemes, with awards for third-party administration, consultancy, and diversity |
1,492 | |||
| 53 |
Euromoney Institutional Investordelinian.com
Global B2B information-services business providing actionable data, analysis, intelligence, and market participant access across multiple international markets. |
1,487 | |||
| 54 |
Connectweconnect.tech
Communication experts providing solutions in Contact Centre, Unified Communications, and Network Services, delivering digital transformation through bespoke strategies for businesses globally |
1,387 | |||
| 55 | 1,358 | ||||
| 56 |
Kantar Mediafifty5blue.com
Provides cross-media audience measurement, data analytics, targeting, and advertising intelligence services to support informed decision-making and business growth globally. |
1,340 | |||
| 57 |
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 |
1,332 | |||
| 58 |
Ordnance Surveyordnancesurvey.co.uk
Provide location data and mapping solutions to governments, businesses, and individuals to enhance safety, security, and decision-making. |
1,296 | |||
| 59 |
FE fundinfofefundinfo.com
By providing accurate data, technology solutions, research, and expert insights, we connect the fund management industry to inform better investment decisions |
1,216 | |||
| 60 |
Aurora Energy Researchauroraer.com
Provide power market forecasting, analytics, advisory support, and software solutions to support investment and financing decisions in energy sector. |
1,188 | |||
| 61 | 1,187 | ||||
| 62 |
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 |
1,153 | |||
| 63 |
QS Quacquarelli Symondsqs.com
Global provider of higher education and career solutions, offering independent data and insights to help students make informed decisions at all academic stages |
1,147 | |||
| 64 |
Merit Data & Technology Indiameritdata-tech.com
A company that provides marketing data, product data, customized software, and marketing automation to help B2B brands embrace the challenges of the future |
1,128 | |||
| 65 |
Smartstreamsmart.stream
Provides financial institutions with accurate, timely data insights to streamline operations, reduce costs, and ensure regulatory compliance confidently. |
1,114 | |||
| 66 |
Companies Housegov.uk
This company is an executive agency that incorporates and dissolves limited companies, registers company information, and makes it accessible to the public |
1,110 | |||
| 67 |
Brandwatchbrandwatch.com
It provides consumer intelligence, social media management, and influencer management to help businesses understand and engage with their customers effectively. |
1,100 | |||
| 68 |
Onclusiveonclusive.com
Global PR and Communications partner offering data-driven insights, consultancy, workflow tools, and media monitoring to elevate performance and prove value |
1,098 | |||
| 69 | 1,076 | ||||
| 70 |
Facultyfaculty.ai
The company develops and implements safe AI systems integrating human and artificial intelligence for optimized performance |
1,073 | |||
| 71 |
Reed Business Informationrisk.lexisnexis.com
Provides innovative data analytics, decision tools, and management services across industries to reduce risk, ensure compliance, and improve operations. |
1,061 | |||
| 72 |
Deltatredeltatre.com
Global leader in fan-first digital experiences offering innovative products/services for sports, media, and entertainment, reaching over one billion minutes of digital content annually |
1,055 | |||
| 73 | 1,010 | ||||
| 74 | 969 | ||||
| 75 | 966 | ||||
| 76 |
Ab Initio Softwareabinitio.com
Development of a high-performance, scalable data processing and analysis platform combined with expert implementation and support across diverse industries. |
965 | |||
| 77 |
Fitch Solutionsfitchsolutions.com
Provides specialized financial data, analytics, and expert insights on credit risk, markets, ESG, and investment strategies worldwide. |
965 | |||
| 78 |
Fastmarketsfastmarkets.com
A leading global provider of price reporting, analytics, and events services for key commodity markets, striving for market transparency and sustainability |
950 | |||
| 79 | 913 | ||||
| 80 |
Achilles Information Limitedachilles.com
Providing supply chain transparency, ESG reporting, carbon management, and risk analysis to support global organizations' sustainability and compliance goals. |
911 | |||
| 81 |
KBC A Yokogawa Companykbc.global
A company specializing in Digital Energy Management & Carbon Emissions Management, offering innovative technologies for low-carbon processes and automated surveillance for sustainability goals |
902 | |||
| 82 |
Oxane Partnersoxanepartners.com
A technology-driven solutions provider for private markets, offering transformative solutions for investment analysis and management across all asset classes |
898 | |||
| 83 |
Kyneteckynetec.com
Global leader in providing data, analytics, and insights for agriculture, animal health, and sustainability to empower clients in making informed decisions and driving growth |
897 | |||
| 84 |
Quantexaquantexa.com
Global platform connecting siloed systems to visualize complex relationships, providing single views of data for risk mitigation and strategic organizational decision making. |
895 | |||
| 85 |
NHS South, Central and Westscwcsu.nhs.uk
Provides support and transformation services to health and care systems, improving outcomes for people, communities, and populations. |
889 | |||
| 86 |
Kantar Operationskantar.com
Kantar Operations delivers competitive advantage through innovation, automation, and expertise with global local teams, delivery centers, and specialists |
886 | |||
| 87 |
SAIsaigroups.co.uk
Overlays machine vision AI on existing CCTV feeds for retailers, preventing theft, recapturing lost sales, and improving operations and safety for customers and employees. |
857 | |||
| 88 |
Computershare UKcomputershare.com
Global leader providing transfer agency, share registration, employee equity plans, mortgage servicing, proxy solicitation, stakeholder communications, and diversified financial services worldwide |
838 | |||
| 89 |
STEMinizio.com
Inizio Advisory provides data-driven solutions for pharmaceutical companies to optimize brand strategy alignment, improve ROI, and accelerate brands' performance |
832 | |||
| 90 |
VML Enterprise Solutionsvml.com
Global company offering end-to-end solutions for retailers and brands to drive transactions and customer loyalty through commerce, technology, data, and experience |
806 | |||
| 91 |
Lead Forensicsleadforensics.com
It provides software that identifies anonymous website visitors, offering businesses valuable information to convert them into actionable sales-ready leads. |
800 | |||
| 92 |
Chambers and Partnerschambers.com
Provides independent rankings and insights on law firms and lawyers worldwide through comprehensive research and analysis across jurisdictions. |
799 | |||
| 93 |
CRUcrugroup.com
Delivers independent, expert intelligence into the global commodities markets, drawing on data, insights, and strategic thinking to help businesses navigate complexities. |
790 | |||
| 94 |
JATO Dynamicsjato.com
provides fast, accurate automotive data and analysis supporting critical decision making for global mobility leaders and market transparency |
783 | |||
| 95 |
Verian Groupveriangroup.com
Leading agency providing research, evidence, evaluation, and communications services to government and public realm clients to solve public policy challenges. |
781 | |||
| 96 |
BBC Monitoringmonitoring.bbc.co.uk
Global media tracking, translation, analysis, and summarization service providing essential insights for various entities since 1939 in over 100 languages |
773 | |||
| 97 |
Microlisemicrolise.com
A company that generates actionable insights from connected assets for fleet operators and product manufacturers through integrated solutions for location, performance, safety, and compliance |
766 | |||
| 98 | 758 | ||||
| 99 |
Incubetaincubeta.com
A global team of 800+ experts across 20 offices offering digital services to unlock business growth for clients like Google, Hyundai, and Netflix |
750 | |||
| 100 |
FACEpulsarplatform.com
A company has merged with Pulsar for global expansion Visit the press release for more information Follow Pulsar Platform on LinkedIn |
734 | |||
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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 Nov 12, 2026.
More company lists in the United Kingdom
- The largest companies in the United Kingdom 36,548
- Multinational companies in the United Kingdom 7,458
- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
- Companies with in-house R&D in the United Kingdom 1,930
- IT Services and IT Consulting companies in the United Kingdom 1,722
- Retail companies in the United Kingdom 1,596
- IT services companies in the United Kingdom 1,583
- Hotel and hospitality groups in the United Kingdom 1,461
- Companies with a mobile app in the United Kingdom 1,411
- Consulting firms in the United Kingdom 1,298
- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
- Family-owned companies in the United Kingdom 1,224
- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
- Wellness and Fitness Services companies in the United Kingdom 1,151
- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060