Largest UK companies by market cap

The largest UK companies by market cap are those listed on the UK stock exchange with the highest total value of all shares, representing their perceived worth by investors. These companies, such as BP, Shell, Unilever, HSBC Holdings, and GlaxoSmithKline, are considered some of the most valuable and powerful in the country, with a significant impact on the global economy. AstraZeneca, Rio Tinto, and Reckitt Benckiser are also notable high-market cap companies in the UK, reflecting their strong foothold in their respective markets.

The total market capitalization of all companies trading on the London Stock Exchange (LSE) took a large hit during the early months of 2020, due mostly part to a mass sell-off of shares caused by the fears surrounding the global coronavirus (COVID-19) pandemic. Between December 2019 and March 2020, the total value of market capitalization decreased by more than *** billion British pounds (GBP). The overall number of companies currently trading has also been falling. The number of daily trades spiked in March 2020 and then decreased as well. As of February 2025, the total market value of all companies trading on the London Stock Exchange stood at over **** trillion British pounds. European stock exchanges While almost every country has a stock Exchange, in Europe only five exchanges are considered major, with total market capital amounting to over *** trillion euros. The London Stock Exchange is the second largest in Europe and tenth largest worldwide. As of January 2025, Europe’s largest stock exchange, Euronext had a total market capital of listed companies valued at approximately **** trillion U.S. dollars.

As of February 2025, the France-incorporated company Saint-Gobain was the second-largest construction company listed on the London Stock Exchange (LSE) with a market capitalization of approximately ** billion British pounds. The leading construction company on the LSE was the Irish CRH, with a market cap of over ** billion British pounds. Construction and materials companies on the exchange had a combined market capital value of *** billion British pounds as of December 2024. CRH largest Irish company CRH, is an international group of enterprises which cover the construction process from materials and products, to distribution. CRH not only topped the London Stock exchange for construction companies, they are also the second largest company headquartered in Ireland in terms of turnover. London Stock Exchange As of February 2025, the London Stock Exchange had approximately ***** companies trading from more than ** countries globally with a combined market capital of approximately *** trillion British pounds (GBP). Seen as the heart of the global financial community, the London Stock Exchange is the second largest market in Europe and ranks eighth globally.

***************** was the leading internet company in the United Kingdom as of October 11, 2024, with a market capitalization amounting to over ** billion U.S. dollars. ********* followed as the second-largest internet company in the country, with a market cap of **** billion U.S. dollars.

With a market capitalization of 3.12 trillion U.S. dollars as of May 2024, Microsoft was the world’s largest company that year. Rounding out the top five were some of the world’s most recognizable brands: Apple, NVIDIA, Google’s parent company Alphabet, and Amazon. Saudi Aramco led the ranking of the world's most profitable companies in 2023, with a pre-tax income of nearly 250 billion U.S. dollars. How are market value and market capitalization determined? Market value and market capitalization are two terms frequently used – and confused - when discussing the profitability and viability of companies. Strictly speaking, market capitalization (or market cap) is the worth of a company based on the total value of all their shares; an important metric when determining the comparative value of companies for trading opportunities. Accordingly, many stock exchanges such as the New York or London Stock Exchange release market capitalization data on their listed companies. On the other hand, market value technically refers to what a company is worth in a much broader context. It is determined by multiple factors, including profitability, corporate debt, and the market environment as a whole. In this sense it aims to estimate the overall value of a company, with share price only being one element. Market value is therefore useful for determining whether a company’s shares are over- or undervalued, and in arriving at a price if the company is to be sold. Such valuations are generally made on a case-by-case basis though, and not regularly reported. For this reason, market capitalization is often reported as market value. What are the top companies in the world? The answer to this question depends on the metric used. Although the largest company by market capitalization, Microsoft's global revenue did not manage to crack the top 20 companies. Rather, American multinational retailer Walmart was ranked as the largest company in the world by revenue. Walmart also had the highest number of employees in the world.

As of February 2025, AstraZeneca Plc was by far the leading healthcare company listed on the London Stock Exchange (LSE) with a total market capitalization of *** billion British pounds. This was followed by GSK Plc and Haleon Plc, with a value of over ** billion and ** billion British pounds, respectively.

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.

Key information about United Kingdom Market Capitalization: % of GDP

• United Kingdom Market Capitalization accounted for 83.8 % of its Nominal GDP in Dec 2024, compared with a percentage of 70.5 % in the previous year
• UK Market Capitalization: % Nominal GDP is updated yearly, available from Dec 1999 to Dec 2024
• The data reached an all-time high of 131.2 % in Dec 2006 and a record low of 70.5 % in Dec 2023

CEIC calculates annual Market Capitalization as % of Nominal GDP from monthly Market Capitalization and quarterly Nominal GDP. London Stock Exchange provides Market Capitalization in local currency. The Office for National Statistics provides Nominal GDP in local currency. As of 2017, definitions from the revised Markets in Financial Instruments Directive (MiFID II) have been introduced. Market Capitalization includes domestically listed companies only.


Further information about United Kingdom Market Capitalization: % of GDP

• In the latest reports, FTSE All-Share recorded a daily P/E ratio of 14.4 in Jul 2022
• FTSE 100 closed at 8,674.0 points in Jan 2025

Greece ASE: Market Capitalization: FTSE Athex Large Cap Index data was reported at 20,602,468.197 EUR th in Nov 2018. This records a decrease from the previous number of 20,931,921.681 EUR th for Oct 2018. Greece ASE: Market Capitalization: FTSE Athex Large Cap Index data is updated monthly, averaging 23,762,615.233 EUR th from Feb 2008 (Median) to Nov 2018, with 129 observations. The data reached an all-time high of 85,940,034.040 EUR th in Apr 2008 and a record low of 8,892,189.420 EUR th in May 2012. Greece ASE: Market Capitalization: FTSE Athex Large Cap Index data remains active status in CEIC and is reported by Athens Stock Exchange. The data is categorized under Global Database’s Greece – Table GR.Z002: Athens Stock Exchange: Market Capitalization.

United Kingdom's main stock market index, the GB100, rose to 9646 points on October 24, 2025, gaining 0.70% from the previous session. Over the past month, the index has climbed 4.68% and is up 16.93% compared to the same time last year, according to trading on a contract for difference (CFD) that tracks this benchmark index from United Kingdom. United Kingdom Stock Market Index (GB100) - values, historical data, forecasts and news - updated on October of 2025.

South Africa Market Cap: FTSE/JSE: Capped Top 40 data was reported at 5,049,296.838 ZAR mn in Jun 2018. This records a decrease from the previous number of 5,165,149.750 ZAR mn for May 2018. South Africa Market Cap: FTSE/JSE: Capped Top 40 data is updated monthly, averaging 3,266,747.846 ZAR mn from Feb 2003 (Median) to Jun 2018, with 185 observations. The data reached an all-time high of 5,908,462.212 ZAR mn in Oct 2015 and a record low of 772,420.061 ZAR mn in Apr 2003. South Africa Market Cap: FTSE/JSE: Capped Top 40 data remains active status in CEIC and is reported by Johannesburg Stock Exchange. The data is categorized under Global Database’s South Africa – Table ZA.Z004: Johannesburg Stock Exchange: Market Capitalization: by Index.

As of February 2025, British holding bank HSBC Holdings Plc was the leading finance company listed on the London Stock Exchange (LSE) with a total market capitalization of almost 166 billion British pounds. Second in the ranking was Spanish bank Banco Santander S.A., with a market cap of nearly 77.7 billion U.S. dollars.

Techsalerator offers an extensive dataset of End-of-Day Pricing Data for all 26 companies listed on the GEMMA (Gilt Edged Market Maker Association) (GEMX) in United Kingdom. This dataset includes the closing prices of equities (stocks), bonds, and indices at the end of each trading session. End-of-day prices are vital pieces of market data that are widely used by investors, traders, and financial institutions to monitor the performance and value of these assets over time.

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Top 5 used data fields in the End-of-Day Pricing Dataset for United Kingdom :

1. Equity Closing Price :The closing price of individual company stocks at the end of the trading day.This field provides insights into the final price at which market participants were willing to buy or sell shares of a specific company.

2. Bond Closing Price: The closing price of various fixed-income securities, including government bonds, corporate bonds, and municipal bonds. Bond investors use this field to assess the current market value of their bond holdings.

3. Index Closing Price: The closing value of market indices, such as the Botswana stock market index, at the end of the trading day. These indices track the overall market performance and direction.

4. Equity Ticker Symbol: The unique symbol used to identify individual company stocks. Ticker symbols facilitate efficient trading and data retrieval.

5. Date of Closing Price: The specific trading day for which the closing price is provided. This date is essential for historical analysis and trend monitoring.

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Top 5 financial instruments with End-of-Day Pricing Data in United Kingdom:

FTSE 100 Index: The Financial Times Stock Exchange 100 Index, often referred to as the FTSE 100 or "Footsie," is the main benchmark index of the London Stock Exchange. It tracks the performance of the 100 largest publicly traded companies in the United Kingdom based on market capitalization.

FTSE 250 Index: The FTSE 250 Index is another major stock market index in the United Kingdom. It includes the next 250 largest companies listed on the London Stock Exchange after the FTSE 100.

Company X: A prominent British multinational corporation that operates in various sectors, such as finance, technology, or energy. This company's stock is actively traded on the London Stock Exchange.

Company Y: A leading British financial institution that offers banking, investment, and financial services both domestically and internationally. This company's stock is widely traded on the London Stock Exchange.

Company Z: A major British pharmaceutical, consumer goods, or manufacturing company with a significant global presence. This company's stock is listed and actively traded on the London Stock Exchange.

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If you're interested in accessing Techsalerator's End-of-Day Pricing Data for United Kingdom, please contact info@techsalerator.com with your specific requirements. Techsalerator will provide you with a customized quote based on the number of data fields and records you need. The dataset can be delivered within 24 hours, and ongoing access options can be discussed if needed.

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Data fields included:

Equity Ticker Symbol Equity Closing Price Bond Ticker Symbol Bond Closing Price Index Ticker Symbol Index Closing Price Date of Closing Price Equity Name Equity Volume Equity High Price Equity Low Price Equity Open Price Bond Name Bond Coupon Rate Bond Maturity Index Name Index Change Index Percent Change Exchange Currency Total Market Capitalization Dividend Yield Price-to-Earnings Ratio (P/E) ‍

Q&A:

1. How much does the End-of-Day Pricing Data cost in United Kingdom ?

The cost of this dataset may vary depending on factors such as the number of data fields, the frequency of updates, and the total records count. For precise pricing details, it is recommended to directly consult with a Techsalerator Data specialist.

1. How complete is the End-of-Day Pricing Data coverage in United Kingdom?

Techsalerator provides comprehensive coverage of End-of-Day Pricing Data for various financial instruments, including equities, bonds, and indices. Thedataset encompasses major companies and securities traded on United Kingdom exchanges.

1. How does Techsalerator collect this data?

Techsalerator collects End-of-Day Pricing Data from reliable sources, including stock exchanges, financial news outlets, and other market data providers. Data is carefully curated to ensure accuracy and reliability.

1. Can I select specific financial instruments or multiple countries with Techsalerator's End-of-Day Pricing Data?

Techsalerator offers the flexibility to select specific financial instruments, such as equities, bonds, or indices, depending on your needs. While the dataset focuses on Botswana, Techsalerator also provides data for other countries and international markets.

1. How do I pay for this dataset?

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South Africa Market Cap: FTSE: Shariah Top 40 Net Total Return data was reported at 2,146,802.794 ZAR mn in Jun 2022. This records a decrease from the previous number of 2,550,627.470 ZAR mn for May 2022. South Africa Market Cap: FTSE: Shariah Top 40 Net Total Return data is updated monthly, averaging 3,053,160.924 ZAR mn from Mar 2021 (Median) to Jun 2022, with 16 observations. The data reached an all-time high of 3,877,807.149 ZAR mn in Feb 2022 and a record low of 2,146,802.794 ZAR mn in Jun 2022. South Africa Market Cap: FTSE: Shariah Top 40 Net Total Return data remains active status in CEIC and is reported by FTSE Russell. The data is categorized under Global Database’s South Africa – Table ZA.Z003: Financial Times Stock Exchange: Enhanced ICB Framework: Market Capitalization: by Index.

South Africa Market Cap: FTSE/JSE: Shareholder Weighted Top 40 Net Total Return data was reported at 4,246,834.997 ZAR mn in Nov 2018. This records a decrease from the previous number of 4,265,557.624 ZAR mn for Oct 2018. South Africa Market Cap: FTSE/JSE: Shareholder Weighted Top 40 Net Total Return data is updated monthly, averaging 4,100,444.067 ZAR mn from Apr 2012 (Median) to Nov 2018, with 80 observations. The data reached an all-time high of 5,125,537.136 ZAR mn in Nov 2017 and a record low of 2,562,684.415 ZAR mn in May 2012. South Africa Market Cap: FTSE/JSE: Shareholder Weighted Top 40 Net Total Return data remains active status in CEIC and is reported by Johannesburg Stock Exchange. The data is categorized under Global Database’s South Africa – Table ZA.Z004: Johannesburg Stock Exchange: Market Capitalization: by Index.

Rio Tinto was the leading mining company in the United Kingdom (UK) as of October 15, 2024, with a market capitalization amounting to over *** billion U.S. dollars. Anglo American followed as the second largest mining company in the country, with a market cap of around ** billion U.S. dollars.

As of February 2025, China Pacific Insurance Group had the highest market cap of any insurance company trading on the London Stock Exchange (LSE). The group saw a market capitalization of **** billion British pounds. Market capitalization is the outstanding value of a company's shares and is often used to measure the size of a company and investor's interest in each enterprise. London Stock Exchange As of July 2023, there were just under ***** companies trading on the London Stock Exchange, and on average somewhere around ******* trades per day. The combined market value of companies trading on the LSE was *** trillion British pounds (GBP) in July 2023, below the peaks found before the COVID-19 pandemic. Initial public offerings (IPOs) When a private company first offers its shares to the public, the process is called an initial public offering (IPO). IPOs are typically used by growing companies that need to raise capital or by allowing owners to sell off some of their ownership of a company. The Kazakhstani technology-focused bank Kaspi saw the highest initial public offering in 2020 of over *** billion British pounds.

South Africa Market Cap: FTSE: Top 40 Net Total Return data was reported at 5,991,489.765 ZAR mn in Jun 2022. This records a decrease from the previous number of 6,526,591.943 ZAR mn for May 2022. South Africa Market Cap: FTSE: Top 40 Net Total Return data is updated monthly, averaging 7,238,001.315 ZAR mn from Mar 2021 (Median) to Jun 2022, with 16 observations. The data reached an all-time high of 7,913,243.449 ZAR mn in Feb 2022 and a record low of 5,991,489.765 ZAR mn in Jun 2022. South Africa Market Cap: FTSE: Top 40 Net Total Return data remains active status in CEIC and is reported by FTSE Russell. The data is categorized under Global Database’s South Africa – Table ZA.Z003: Financial Times Stock Exchange: Enhanced ICB Framework: Market Capitalization: by Index.

The Report Covers Business Intelligence Companies UK and the Market is segmented by Organization Size (Small & Medium-scale, Large-scale) and End-User (BFSI, IT & Telecom, Retail & Consumer Goods, Manufacturing & Logistics, and Public Services). The market sizes and forecasts are provided in terms of value (USD million) for all the above segments.

The United Kingdom Hedge Funds Market is Segmented by Investment Strategy (Equity Long/Short, Global Macro, Event-Driven, and More), Investor Type (Pension Funds, Insurance Companies, and More), Distribution Channel (Direct Sales, Placement Agents/Intermediaries, and More), Fund Domicile & Structure (UK-Onshore, Offshore, Cayman, and More), and Region. The Market Forecasts are Provided in Value (USD).