Top 10 Biggest Companies in the UK

Top 10 Biggest Companies in the UK

The UK is home to some of the world’s largest companies known for their high-quality products and services. This blog will discuss the top 10 biggest companies in the UK that have significantly impacted the global market. From energy giants Shell and BP to retail giant Tesco, we have covered everything you need to know about these companies.

We have also listed other prominent names such as HSBC, Aviva, Rio Tento, Legal & General, Unilever, Lloyds Banking Group, and Vodafone. Join us as we examine how these companies have achieved success and their growth plans.

Top 10 Biggest Companies in the UK

The largest companies in the UK are noteworthy for their revenue generation capacity and market capitalisation. This blog post highlights some of them. For instance, British Petroleum or BP, is one of the biggest oil and gas producers globally. HSBC Holdings is one of Europe’s largest banks offering financial services worldwide. Unilever owns popular consumer goods brands such as Dove and Lipton.

Tesco is one of the largest supermarket chains, with over 6,500 stores worldwide. Other notable UK companies include Royal Dutch Shell, GlaxoSmithKline (GSK), Diageo (which owns Guinness), AstraZeneca (pharmaceuticals), BAE Systems (aerospace & defence), Rio Tinto Group (mining company).

1. Shell plc

Shell plc

Shell plc, located in London, UK, is one of the largest oil and gas companies globally; it has over 80k employees across 70 countries. Shell’s portfolio comprises exploration, production, refining, and marketing of petroleum products. The corporation also acknowledges its responsibility towards climate change by reducing carbon emissions while adhering to legal requirements. In addition, it aims to invest in renewable energy sources whilst engaging in social and environmental initiatives for sustainability purposes.

2. BP


Operating globally, specialising in oil and gas production, refining and marketing, BP is considered one of the largest energy companies worldwide. The company, which aims at reducing its carbon footprint by investing more in renewable energy sources, has faced criticism for its involvement in environmental disasters such as the Deepwater Horizon oil spill but still holds a significant position in the UK’s economic landscape and global energy industry.

3. Tesco


As the largest retailer in the UK, Tesco has over 3,700 stores and 310,000 employees. This company has become a household name in the UK and beyond, offering everything from groceries to clothing to financial services. In addition, Tesco operates internationally, with stores throughout Europe and Asia. So whether you’re looking for essential medicines or electronics, you will find them at Tesco.



Founded in 1865, HSBC has become one of the largest banks globally, with operations spread across 80 countries. The bank also provides customers with personalised banking solutions that cater to their commercial and business investment needs.

Although it has recently faced negative publicity due to alleged involvement in money laundering and tax evasion schemes, HSBC still stands tall as a profitable organisation contributing significantly to the UK’s economy.

5. Aviva


Aviva is a leading multinational insurance company headquartered in London. Established in 2000, Aviva has become one of the most prominent financial institutions worldwide. The company provides various insurance services, including life, home, car and travel insurance, and investment and retirement solutions.

Operating in more than sixteen countries globally with over thirty thousand employees on its payroll, Aviva is synonymous with trust and reliability.

6. Rio Tinto

Rio Tinto

Rio Tinto Group is a leading British-Australian multinational company specialising in producing essential minerals such as iron ore, copper, and diamonds. Operating out of more than 35 countries across Europe, Africa, Asia-Pacific, and North America makes them an industry leader with a market capitalisation of £71.8bn ($94bn).

Despite controversies surrounding their activities in Australia about indigenous lands, Rio remains one of the largest employers in London, with over 4k employees traded on both ASX200 and FTSE20.

7. Legal & General

Legal & General

With a market capitalisation of over £17 billion, its focus on sustainable investing, and responsible financing practices that have earned it various accolades, Legal & General is among the top players offering financial services in the United Kingdom. It provides extensive services, from insurance to investment solutions to retirement planning.

Alongside this broad spectrum of offerings in the UK property market space that covers commercial and residential real estate throughout Europe, Legal & General continues to operate its business across multiple geographical locations, including the US and Asia.

8. Unilever


With operations in over 190 countries, Unilever is a global leader in consumer goods. The company’s focus on sustainability has earned it several awards and recognition. Its presence in the UK is marked by its headquarters situated in London. Unilever employs over 155,000 people worldwide, making it one of the largest employers globally. As a company with significant operations in the food industry, Unilever continues to set the standard for sustainable practices.

9. Lloyds Banking Group

Lloyds Banking Group

With its headquarters in London, Lloyds Banking Group is one of the largest financial services companies in the United Kingdom. Following its merger with HBOS in 2009, it offers banking, insurance, and investment products to both individuals and small businesses. With an eye towards sustainability, Lloyds aims to become a net-zero carbon business by 2050.

This dedication has earned recognition as one of the top-performing British companies regarding climate change action. In addition, Lloyds’ commitment to reducing its environmental impact means they’re an excellent choice for anyone who values ethical investing.

10. Vodafone


With headquarters in London, Vodafone is a British multinational telecommunications company that offers a wide range of services, such as mobile and fixed-line voice and data services, broadband, and TV services. Having won several awards for customer service, it has over 19 million customers in the UK alone. Vodafone is committed to sustainability, with ambitious goals to reduce its carbon footprint and support renewable energy. It operates globally in over 25 countries with a strong focus on customer service.


These top companies in the UK are a testament to their unwavering dedication and hard work towards achieving goals. The companies range from oil and gas giants to banks, retailers, and insurance providers. They have provided employment opportunities on a large scale, boosted the economy, and given back to society in many ways.

FAQ – Top 10 Biggest Companies in the UK

FAQ - Top 10 Biggest Companies in the UK

What is Britain’s richest company?

According to recent data, Shell is currently the wealthiest company in the UK, with revenue exceeding £200 billion. However, rankings may differ based on various factors. Other top companies include BP, HSBC Holdings, and Tesco.

How many Fortune 500 companies are from the UK?

In 2021, the Fortune Global 500 list included 16 companies based in the UK, such as BP, HSBC Holdings, and Unilever, ranked by their revenue. However, it’s important to note that the number of UK companies on the list can change annually.

What is the strongest industry in the UK?

The UK’s largest and strongest industry is the service industry, with finance and banking as standout sectors. Manufacturing, healthcare, and technology also contribute to the economy. However, an industry’s strength can fluctuate due to economic factors and government policies.

What is the UK’s fastest-growing company?

The UK’s fastest-growing company is a fluid title influenced by many factors. Gymshark, Cazoo, and Gousto are among the rapidly expanding firms. These innovative companies challenge traditional business models. To stay up to date on the latest, follow industry news.

How many Indian companies are in the UK?

The UK hosts over 850 Indian companies, contributing to over 110,000 jobs. Tata Group, Infosys, and Wipro are some of the top Indian firms in the UK. In addition, India is the UK’s third-largest foreign investor, investing over 36 billion pounds.