As of February 2025, Shell Plc was the leading company in the energy sector listed on the London Stock Exchange (LSE), with a total market capitalization value of over *** billion British pounds. This was followed by Reliance Industries Limited and TotalEnergies, with values of over *** billion and *** billion British pounds, respectively.

Shell had the highest annual revenue of all companies based in the United Kingdom in 2025, at approximately 284 billion U.S. dollars. BP had the second-highest annual revenue at over 189 billion dollars, followed by HSBC Holdings, which had a revenue of around 142 billion U.S. dollars. In terms of global employee numbers, however, Compass Group had the highest number among UK-based businesses, at approximately half a million in 2024, followed by Tesco at 336,400 and HSBC at almost 211,000. Big Oil, a banking giant, and Britain's top supermarket chain The two companies listed as having the most revenue in the UK this year are also two of the biggest oil and gas companies in the world, alongside Chevron, Eni, ExxonMobil, and TotalEnergies. After a huge surge in energy prices in 2022, these companies saw their profits recede slightly in 2023, but clearly remain in strong financial positions as of 2024. HSBC Holdings, meanwhile, was the largest bank in Europe in terms of market capitalization, and was estimated to have the second-highest number of UK-based customers in 2024. The company with the fourth-highest revenue in this year, Tesco has by some distance the largest grocery-market share in Great Britain, a position it has maintained despite growing competition from discounters like Lidl and Aldi. UK economy health check In the first quarter of 2025, the UK economy grew by 0.7 percent, emerging from a brief slowdown in growth towards the end of 2024. Consumer Price inflation, has, however, started to increase, with the inflation rate reaching 3.5 percent in April, the highest rate since January 2024. Furthermore, the UK labor market is showing signs of weakness, with quite a high number of job losses since the start of the year. Alongside these generally negative signs, business confidence in the UK has been falling, with the main concern of UK firms being that of taxation, as of early 2025.

Compass Group had by far the highest number of global employees among companies based in the United Kingdom as of 2025, at approximately 500,000 employees. Tesco had the second-highest number of employees at around 336,400, followed by HSBC Holdings which had 211,000 employees. In the same year, HSBC Holdings had an annual revenue of 142.3 billion U.S. dollars, the third-highest among UK-based companies. The oil and gas giant Shell had the highest annual revenue at over 283 billion dollars, ahead of BP at 189 billion dollars. How many businesses are there in the UK? In 2024, there were approximately 5.5 million business enterprises in the UK, down from a peak of 5.98 million in 2020. Although there were just 1,930 large firms that employed 1,000 people or more, these firms employed more than a quarter of the UK's private sector workforce, and made a combined turnover of approximately 1.69 trillion British pounds. As of this year, the construction industry had the highest number of enterprises by sector, at over 870,000. The sector with the most workers was that of wholesale and retail, which collectively employed just under 4.9 million people in 2024, and also had the highest turnover compared to other sectors, at over 1.8 trillion pounds. Current UK economic climate Although the UK economy is expected to grow in 2025, growth has been downgraded from earlier forecasts, while inflation and unemployment are expected to be higher than initially thought. According to the business confidence index, sentiment among businesses at the end of 2024 was lower than it has been since early 2021. Furthermore, since the start of 2025, businesses have been shedding jobs at an accelerating rate, possibly due to recent tax rises, which was seen as the main external concern of businesses in early 2025. The precarious state of the UK's government finances, and potential tax rises in the next budget, are also likely feeding into this pessimistic mood.