| # | Company | Employees |
|---|---|---|
| 1 |
National Gridnationalgrid.com
Operate and develop electricity transmission and distribution networks, natural gas systems, and invest in clean energy infrastructure and technology ventures. |
17,432 |
| 2 |
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. |
7,832 |
| 3 | 4,218 | |
| 4 |
Liberty Globallibertyglobal.com
Global provider of broadband, mobile communications, and infrastructure investing in fibre, 5G networks, content, technology, and innovation. |
2,833 |
| 5 |
Blenheim Chalcotblenheimchalcot.com
A venture builder investing in high-growth sectors by providing funds, expertise, and infrastructure to build profitable, scalable companies globally |
2,370 |
| 6 |
Octopusoctopusgroup.com
It is an entrepreneurial investment group focused on building businesses that address societal challenges, emphasizing stakeholder interests and sustainability. |
1,234 |
| 7 |
Hghgcapital.com
Investing in European and transatlantic software and services businesses, building sector-leading enterprises with critical applications and workflow services for an automated workplace. |
1,191 |
| 8 |
Grosvenorgrosvenor.com
The company develops, manages, and invests in property, agtech, and charitable initiatives with a focus on creating lasting benefits for current and future generations |
1,045 |
| 9 |
Northern and Shellnorthernandshell.co.uk
A media group with newspapers, magazines, television channels, and a lottery business committed to excellence for customers and partners |
999 |
| 10 |
Patria Investmentspatria.com
Alternative investment firm specializing in resilient sectors using local insights and global knowledge to manage over fifty billion dollars in assets. |
977 |
| 11 | 961 | |
| 12 |
Angel Network
An angel investor network connecting individuals across London and the UK to invest in early stage businesses with growth potential |
853 |
| 13 |
DC Thomsondcthomson.co.uk
A leading UK media organization diversifying into publishing, digital technology, radio, TV, events, genealogy, cloud solutions, and a variety of media brands |
815 |
| 14 |
Entrepreneur Firstjoinef.com
A platform bringing exceptional individuals together to meet co-founders, develop ideas, and raise funds for startups, with backing from top tech founders and investors |
766 |
| 15 |
British International Investmentbii.co.uk
A UK-based development finance institution and impact investor, partnering with businesses in Africa, Asia, and the Caribbean to create inclusive economies |
706 |
| 16 |
Urban Partnersurban.partners
Urban Partners invest in solving urban problems by uniting insights, stakeholders, and capital to make cities sustainable and beneficial for people and the planet |
697 |
| 17 |
Permirapermira.com
Global investment firm providing long-term funding in private equity and credit across key sectors, backing businesses with growth ambitions through flexible financing solutions |
679 |
| 18 |
British Business Bankbritish-business-bank.co.uk
Design and manage government finance programs to increase access to funding for smaller businesses, supporting sustainable growth and net zero transition. |
644 |
| 19 |
Vesta Software Groupvestasoftwaregroup.com
The company acquires, manages, and builds software companies within vertical markets to become industry leaders, offering mission-critical enterprise solutions and growth opportunities |
643 |
| 20 | 639 | |
| 21 |
Bridgepoint Groupbridgepointgroup.com
A global private asset growth investor specializing in private equity and debt, managing €395bn in assets with expertise in Europe, US, and China |
637 |
| 22 |
Pantheonpantheon.com
Investment management firm specializing in private equity, real assets, and private credit with customized solutions and global client partnerships. |
626 |
| 23 | 624 | |
| 24 |
Miroma Groupmiromagroup.com
Global independent marketing business driving growth for disruptive brands through award-winning agencies and unique investment models for seed and Series A funding |
595 |
| 25 | 584 | |
| 26 |
Midwich Group plcmidwichgroupplc.com
Specializes in audiovisual technology solutions, product distribution, system design, marketing, financing, and support to connect manufacturers and customers worldwide. |
575 |
| 27 |
Foresight Groupforesight.group
Investment management firm specializing in real assets and growth capital, supporting energy transition, decarbonization, nature recovery, and ambitious companies. |
567 |
| 28 | 556 | |
| 29 | 547 | |
| 30 |
Arrow Global Grouparrowglobal.net
Manages private credit, real estate, and alternative assets across Europe, delivering risk-adjusted returns for investors through specialized platforms and local market expertise. |
538 |
| 31 |
AURELIUSaurelius-group.com
A globally active alternative investment group with key focuses on private equity, private debt, and real estate, known for operational excellence and delivering superior returns |
499 |
| 32 |
3i Group plc3i.com
Investment company focusing on private equity and infrastructure in northern Europe and North America, supporting mid-market businesses and entrepreneurs. |
454 |
| 33 |
LifeArclifearc.org
LifeArc is a medical research charity specializing in advancing lab discoveries into diagnostics, treatments, and cures, resulting in life-changing medical breakthroughs |
438 |
| 34 |
Coller Capitalcollereqt.com
provides liquidity solutions acquiring interests in private equity, credit, and other private market assets for global investors |
400 |
| 35 |
BC Partnersbcpartners.com
International investment firm offering select investment strategies in Europe and North America, including real estate and credit investments, with a focus on creating synergies for investors |
399 |
| 36 |
Schroders Capitalschroderscapital.com
Specialized teams provide global access to investments in Real Estate, Infrastructure, Private Equity, and Private Debt & Credit Alternatives with a focus on sustainability and impact investing |
396 |
| 37 |
Cinvencinven.com
International private equity firm driving revenue growth for companies, with a focus on global expansion and responsible investing in various sectors 40 years, 6 sectors, 1 team |
356 |
| 38 |
Hamilton Bradshaw Grouphamiltonbradshaw.com
A London-based private equity firm specializing in providing advice, management services, and investments in recruitment and property sectors in the UK |
351 |
| 39 |
Octopus Investmentsoctopusinvestments.com
Investment company managing £134 billion for retail and institutional investors, focused on empowering people, revitalising healthcare, and building a sustainable planet |
350 |
| 40 |
Bregal Investmentsbregal.com
Global investment platform providing capital, expertise, and infrastructure to private markets teams across various strategies and life cycle stages. |
330 |
| 41 |
Downingdowning.co.uk
Manages approximately £2.4 billion in assets across funds, investment trusts, and products, focusing on private and public market investments. |
321 |
| 42 |
IK Partnersikpartners.com
European private equity firm investing in companies across Benelux, DACH, France, Nordics, and UK with long-term growth focus. |
318 |
| 43 |
Hayfin Capital Management LLPhayfin.com
A leading alternative asset management firm investing over €36 billion in capital across various strategies, with a diverse team globally |
305 |
| 44 |
Gresham Housegreshamhouse.com
Specialist alternative asset manager focused on sustainable investments in forestry, renewable energy, affordable housing, and more, with £85bn assets under management |
300 |
| 45 |
Peter Vardy Globalpetervardyglobal.com
A family-run motor retail business in the UK offering a variety of franchises, committed to giving back through the Peter Vardy Foundation |
299 |
| 46 |
Rothschild & Co Redburnrothschildandco.com
Provides institutional investors with equity research, analysis, execution services, and connects investors to experts and corporates globally. |
289 |
| 47 |
SoftBank Investment Advisersvisionfund.com
Invests over $140 billion in AI businesses and technologies through Vision Funds, providing operational expertise, global network, and capital to founders. |
284 |
| 48 |
Triple Pointtriplepoint.co.uk
Activates capital innovatively across industries and asset classes, acting as a productive partner to create immediate and lasting impact. |
282 |
| 49 |
John Lainglaing.com
Leading international investor, active manager of core infrastructure assets across transportation, energy, utilities, telecommunications, and social infrastructure in OECD countries. |
281 |
| 50 |
Oakley Capitaloakleycapital.com
Invests in private European businesses, supports founders with growth strategies, manages over €15 billion, focuses on technology and services sectors. |
272 |
| 51 |
Shop Circleshopcircle.co
A leading provider of e-commerce tools empowering independent brands to create consumer-friendly experiences and helping sellers scale their businesses |
272 |
| 52 |
EPIC Investment Partnersepicip.com
Global investment firm offering capital investment, fund administration, market management, and advisory services to companies, entrepreneurs, and investors worldwide |
270 |
| 53 |
Five Arrowsrothschildandco.com
Management of private equity funds, multi-manager funds, co-investments, syndicated loans, and direct lending across global offices. |
264 |
| 54 |
Investindustrialinvestindustrial.com
Investindustrial provides capital, expertise, and global platforms to mid-market European companies, focusing on sustainable value creation and international expansion across various industries |
262 |
| 55 |
IP Group plcipgroupplc.com
Investment in early-stage science businesses focusing on deeptech, life sciences, and cleantech, supporting university innovations and growth funds. |
256 |
| 56 |
Inflexioninflexion.com
Investment firm focusing on high-growth entrepreneurial businesses, supporting growth through partnerships, international expansion, and strategic expertise across multiple sectors. |
238 |
| 57 |
Equitixequitix.com
Responsible investor developing and managing global infrastructure assets, contributing to communities. Employs 200 professionals, manages 360 assets in 20 countries, $12bn AUM. |
223 |
| 58 |
Cheyne Capitalcheynecapital.com
London-based alternative investment fund manager specializing in real estate debt, impact real estate, corporate credit, and equity investments. |
219 |
| 59 |
CVC Creditcvc.com
Established in 2005, the company invests in sub-investment grade corporate credit markets in Europe and North America, focusing on downside protection and active risk management |
210 |
| 60 |
Vitruvian Partnersvitruvianpartners.com
International investment firm supporting ambitious entrepreneurs and high growth companies through buyouts and growth capital investments, investing €40m-€600m+ in companies valued between €75m-€4bn+ |
207 |
| 61 |
Montagumontagu.com
Leading mid-market private equity firm, committed to finding and growing businesses that make the world work, specializing in carve-out and first-time buyout investments. |
205 |
| 62 |
Pollinationpollinationgroup.com
Specialist climate change advisory and investment firm focused on accelerating the transition to a net zero, climate-resilient future through global partnerships and investment platforms |
189 |
| 63 |
Algebris Investmentsalgebris.com
Independent global asset manager offering long-only and alternative investment strategies focused on generating long-term stable income for investors. |
181 |
| 64 |
Eight Roadseightroads.com
Global venture capital firm supporting technology and healthcare entrepreneurs across Europe, India, China, Japan, and the US with extensive experience. |
179 |
| 65 |
Amber Infrastructureamberinfrastructure.com
Specialist international investment manager focusing on infrastructure asset management across public, transport, energy, digital, and demographic sectors globally. |
179 |
| 66 |
InfraRed Capital Partnersircp.com
manages global infrastructure assets with $13bn equity, develops early-stage projects, operates worldwide with sector expertise and investor focus |
178 |
| 67 |
StartupLanesstartuplanes.com
Provides comprehensive services from idea to IPO for startups, including legal, financial, marketing, and funding, reducing costs and increasing revenue across 15 countries. |
172 |
| 68 |
Park Square Capitalparksquarecapital.com
A leading private credit investor offering mid-market direct loans, senior debt and junior capital solutions to stable companies in Europe and the US |
169 |
| 69 |
M7 Real Estate Ltdm7re.eu
Leading pan-European commercial real estate specialist managing over 500 properties worth €58 billion through private funds, separate accounts, joint ventures, and advisory mandates |
166 |
| 70 |
Arcmont Asset Managementarcmont.com
A private debt asset management firm providing flexible capital solutions to European businesses with a proven investment track record and experienced team |
166 |
| 71 | 157 | |
| 72 |
Tristan Capital Partnerstristancap.com
Real estate investment manager specializing in value-added strategies across UK and mainland Europe, with funds including Core+, opportunistic, and debt strategies |
152 |
| 73 |
MARK Capital Managementthisismark.com
A private equity real estate investment manager targeting urbanization and technological opportunities to make a lasting impact on invested cities |
152 |
| 74 |
DST Globaldst-global.com
Global Internet investment firm with investments in top companies worldwide, including Silicon Valley, New York, London, Beijing, and Hong Kong offices |
148 |
| 75 |
Opus Business Advisory Groupopusllp.com
A diverse group of practices specializing in business advisory, restructuring, M&A, forensic accounting, equity investment, business rescue plans, and turnaround services |
147 |
| 76 |
Keensight Capitalkeensight.com
Investment firm specializing in growth buyouts, supporting profitable technology and healthcare companies across Europe with capital and strategic guidance. |
144 |
| 77 |
Caincainint.com
A privately held investment firm focusing on real estate and business opportunities in global gateway cities, managing over $15 billion in assets |
143 |
| 78 |
Pharo Managementpharo.com
Global investment firm specializing in macro trends in developing countries Manages $10B across four funds, delivering attractive returns through expertise gained across market cycles |
139 |
| 79 |
Everfieldeverfield.com
everfield is a long-term investor and accelerator for established software companies, providing holistic best practices, strong network, and deep financial backup |
137 |
| 80 |
Mercia Asset Management PLCmercia.co.uk
Specialist asset manager supporting regional businesses with growth aspirations through proactive investment and tailored financial solutions. |
136 |
| 81 |
17Capital17capital.com
Global source of non-dilutive capital for private equity investors, offering NAV finance and strategic partnerships to support value creation and portfolio management |
135 |
| 82 |
CVC Secondary Partnerscvc.com
A secondary private equity firm specializing in acquiring private equity assets, providing liquidity solutions globally, with expertise in various transaction types |
134 |
| 83 |
Fasanara Capitalfasanara.com
Manages over $5.7 billion in fintech-focused strategies for pension funds, insurance companies, using a proprietary technology platform to invest in alternative credit. |
133 |
| 84 |
Atomicoatomico.com
European venture capital firm partnering with ambitious technology entrepreneurs from early stage to scale, providing investment and operational support for global progress. |
133 |
| 85 |
Blackfinch Groupblackfinch.com
specialist in tax-efficient investments, managed portfolios, early-stage investing, property financing, and energy infrastructure with extensive asset management |
133 |
| 86 |
Schroders Greencoat LLPschrodersgreencoat.com
Manages investments in renewable infrastructure globally, providing solutions for investors in assets like wind and solar, aiming for strong risk-adjusted returns and positive environmental outcomes. |
133 |
| 87 |
SISBANsisban.com
Company specializing in investment development services, providing strategic guidance and support for financial growth and portfolio management |
129 |
| 88 |
Cambria Automobilescambriaautomobiles.co.uk
The company is a UK motor dealership group that sells new and used cars, commercial vehicles, and motorbikes with a focus on associate, guest, brand, and stakeholder satisfaction |
129 |
| 89 |
CDC Group plcbii.co.uk
A company specializing in international investments, providing services in various financial sectors with a focus on British markets |
127 |
| 90 |
Terra Firmaterrafirma.com
Investment firm focusing on transforming asset-rich businesses in essential industries through long-term strategic, operational, and financial improvements. |
124 |
| 91 |
Maven Capital Partnersmavencp.com
Support UK companies with buyouts, growth capital, pre-IPO financing, and offer investors co-investment and tax-efficient opportunities. |
124 |
| 92 |
Pollen Street Capitalpollenstreetgroup.com
A high-performing private capital asset manager with expertise in real estate, financial, and business services, managing over £34bn AUM globally |
119 |
| 93 |
Index Venturesindexventures.com
Partners with driven entrepreneurs globally, transforming bold ideas into successful businesses with funding, strategy, and network support from early stages to IPO. |
117 |
| 94 |
Octopus Venturesoctopusventures.com
venture capital firm investing in entrepreneurs and businesses focused on sustainability, empowerment, and healthcare innovation across UK and Europe |
115 |
| 95 |
Seedcampseedcamp.com
Seedcamp is a leading seed fund in Europe investing in early-stage startups solving global problems with technology, supporting over 490 successful businesses |
113 |
| 96 |
EMK Capitalemkcapital.com
UK-based private equity fund investing in businesses for growth and change, offering support beyond capital with over £100m commitment per investment Specializing in various sectors |
109 |
| 97 |
Madsgencyabout.madsgency.com
A full-service digital marketing agency driving results with battle-tested strategies and trusted services to help businesses grow online leads, calls, and revenue |
108 |
| 98 |
Flashpoint Venture Capitalflashpointvc.com
An international tech investment manager with $500 million AUM, focusing on US and Western European tech companies, offering Venture Capital, Growth Debt, and Direct Secondary products |
107 |
| 99 |
Baldertonbalderton.com
Multistage venture firm with 25 years of experience supporting Europe’s best founders from Seed to IPO, investing across the technology sector. |
107 |
| 100 |
Cygnum Capitalcygnumcapital.com
A leading investment banking and asset management firm offering tailored financial solutions across frontier and emerging markets with deep sectoral knowledge |
106 |
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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.
More company lists in the United Kingdom
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