| # | Company | Employees |
|---|---|---|
| 1 |
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 |
1,868 |
| 2 |
Hampshire & Isle of Wight Constabularyhampshire.police.uk
Law enforcement agency serving Hampshire and Isle of Wight with over 3,000 officers and staff, committed to fairness, equality, and exceptional local policing |
1,769 |
| 3 |
Abri Groupabri.co.uk
Manage and own over 58,000 homes, providing affordable, social rent, shared ownership, and market housing across South England. |
959 |
| 4 |
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 |
| 5 |
Hendy Grouphendy.co.uk
A leading UK family motor group with a 160-year history, representing 22 automotive brands across eight counties on the South Coast |
798 |
| 6 |
Blake Morgan LLPblakemorgan.co.uk
A regional firm in southern England and Wales with over 100 partners and 800 staff, providing access to skilled legal professionals |
647 |
| 7 |
Selwood Ltdselwood.co.uk
Leading UK company providing pump rental services and manufacturing high-quality pumps for water, environmental, and construction sectors worldwide. |
623 |
| 8 |
NHS Talking Therapies Hampshiretalkingtherapieshiow.nhs.uk
A partnership providing free talking therapies in Hampshire for individuals 16+ registered with a GP, offering face-to-face, telephone, group, and online sessions |
554 |
| 9 |
Hampshire Fire and Rescue Service (HFRS)hantsfire.gov.uk
Fire and rescue service focusing on prevention, protection, and emergency response to safeguard communities in Hampshire and the Isle of Wight. |
496 |
| 10 |
NHS Hampshire and Isle of Wighthantsiow.icb.nhs.uk
The Hampshire and Isle of Wight Integrated Care Board sets strategic plans to allocate NHS resources for delivering health services in the region |
383 |
| 11 |
Eastleigh Borough Councileastleigh.gov.uk
Local government providing community support, housing development, environmental protection, health initiatives, and infrastructure projects for residents and businesses. |
358 |
| 12 |
Radian Groupabri.co.uk
Manage 38,000 homes across southern England, serve 79,000 customers, and plan to build 10,000 new homes in ten years. |
219 |
| 13 |
RioMed Ltd.riomed.com
A modern software company developing healthcare solutions for organizations worldwide, with a focus on digital transformation, interoperability, and customization |
199 |
| 14 |
TradePoint UKtrade-point.co.uk
A trade-only arm of a popular retailer, offering a wide range of trusted brands at competitive prices for tradesmen, including building, maintenance, and decorating products |
143 |
| 15 |
Amoscoamosco.com
Established in 1978, providing quality inspection services including radiographic and ultrasonic inspections, lifting equipment inspection, manpower services, maintenance and repair services, and training Operations in Africa and the Middle East |
102 |
| 16 |
Peters & May Grouppetersandmay.com
Providing tailored logistics solutions by sea, road, and air across marine, superyachts, commercial, automotive, and forwarding sectors worldwide. |
94 |
| 17 |
The Federation of Holistic Therapists (FHT)fht.org.uk
The company is the UK's largest professional association for therapists in complementary, beauty, and sports fields, supporting qualified individuals |
92 |
| 18 |
ActiveMe 360activeme360.com
A social enterprise dedicated to improving health and wellbeing through physical activity, sport, and education, with a focus on community impact |
46 |
| 19 |
Regal Insuranceww25.regalinsurance.co.uk
Specialist provider of high-value home insurance for low-risk customers, part of Ageas Group through Ageas Retail Limited |
42 |
| 20 |
DataGardenerdatagardener.com
It is a B Corp Certified Business Intelligence platform that centralizes data analysis for UK companies, enhancing efficiency and ROI. |
41 |
| 21 |
Business Choice Directbusinesschoicedirect.co.uk
Commercial insurance experts offering tailored policies from a wide range of partners, specializing in various types of business insurance with emphasis on personalized customer service |
41 |
| 22 |
AFC Stonehamafcstoneham.co.uk
The company provides a structured player pathway to their first team, offering football programs for all ages and abilities with a focus on youth development |
27 |
| 23 |
Alldays plcalldays.co.uk
A UK-based company with stores across the country, particularly in Scotland and the south-east of England, was acquired by The Coop in 2002 |
23 |
| 24 |
Knight Goodhead Chartered Accountantsknightgoodhead.co.uk
Offering accounting, auditing, and tax advice to businesses, individuals, and nonprofits in a clear manner with a friendly team approach |
12 |
| 25 |
Earnshaw Engineering Ltdearnshawengineering.co.uk
A diversified engineering company specializing in high quality manufacturing, adhering to EU standards, with ISO 9001 and CE marking certifications |
11 |
| 26 |
Stride Ltd.stride.co.uk
Independent insurance specialist with 40+ years experience in property and business insurance, offering tailored coverage, UK underwriting, and top insurer access for peace of mind |
10 |
| 27 |
DAZZLING WEB PLANETdazzlingwebplanet.com
Specializing in digital growth, we create integrated strategies to elevate brands and leverage data and innovation for impactful results Contact us for support |
10 |
| 28 |
Eurofins Hursleyemctesting.co.uk
UK-based UKAS accredited EMC test lab offers worldwide certification and access to global markets for a variety of industries |
6 |
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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.
The same list elsewhere in United Kingdom
- The largest companies in the United Kingdom 30,833
- The largest companies in England 27,553
- The largest companies in Scotland 1,331
- The largest companies in Wales 473
- The largest companies in Northern Ireland 297
- The largest companies in London 11,154
- The largest companies in Manchester 717
- The largest companies in Birmingham 410
- The largest companies in Leeds 393
- The largest companies in Edinburgh 380
- The largest companies in Glasgow 346
- The largest companies in Cambridge 235
- The largest companies in Nottingham 214
- The largest companies in Liverpool 210
- The largest companies in Bristol 198
- The largest companies in Newcastle upon Tyne 184
- The largest companies in Milton Keynes 181
- The largest companies in Leicester 180
- The largest companies in Sheffield 180
- The largest companies in Reading 169
- The largest companies in Oxford 167
- The largest companies in Cardiff 154
- The largest companies in Coventry 143
- The largest companies in Belfast 137