Key information about United Kingdom Market Capitalization

• United Kingdom Market Capitalization accounted for 3,825.441 USD bn in Oct 2025, compared with a percentage of 3,793.672 USD bn in the previous month
• UK Market Capitalization is updated monthly, available from Apr 1999 to Oct 2025
• The data reached an all-time high of 4,211.587 USD bn in Oct 2007 and a record low of 1,402.869 USD bn in Sep 2002

CEIC converts monthly Market Capitalization into USD. London Stock Exchange provides Market Capitalization in local currency. The Federal Reserve Board period end market exchange rate is used for currency conversions. Market capitalization includes only domestically listed companies. As of 2017, definitions from the revised Markets in Financial Instruments Directive (MiFID II) have been introduced.

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.

Between the first quarter of 2007 and the fourth quarter of 2024, the lowest market capitalization of all companies listed on the London Stock Exchange (LSE) was recorded in the first quarter of 2009, at *** trillion British pounds. As of the fourth quarter of 2024, the market capitalization of the entire LSE amounted to *** trillion British pounds. Although the value of companies trading has fluctuated and increased overall, a downward trend can be seen in the number of companies listed on the LSE.

Key information about United Kingdom Market Capitalization: % of GDP

• United Kingdom Market Capitalization accounted for 82.7 % of its Nominal GDP in Dec 2024, compared with a percentage of 69.6 % 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 130.7 % in Dec 2006 and a record low of 69.6 % 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 9,720.5 points in Nov 2025

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.

Graph and download economic data for Stock Market Capitalization to GDP for United Kingdom (DDDM01GBA156NWDB) from 1975 to 2014 about market cap, stock market, capital, United Kingdom, and GDP.

United Kingdom Market Capitalization: LSE: Annual: Equities data was reported at 2,624,992.105 GBP mn in 2017. This records an increase from the previous number of 2,366,329.969 GBP mn for 2016. United Kingdom Market Capitalization: LSE: Annual: Equities data is updated yearly, averaging 855,216.150 GBP mn from Dec 1972 (Median) to 2017, with 46 observations. The data reached an all-time high of 2,624,992.105 GBP mn in 2017 and a record low of 17,465.700 GBP mn in 1974. United Kingdom Market Capitalization: LSE: Annual: Equities data remains active status in CEIC and is reported by London Stock Exchange. The data is categorized under Global Database’s United Kingdom – Table UK.Z004: London Stock Exchange: Market Capitalisation.

United Kingdom Market Capitalisation: UK Main Market: Total data was reported at 2,499,251.385 GBP mn in Mar 2025. This records a decrease from the previous number of 2,527,274.100 GBP mn for Feb 2025. United Kingdom Market Capitalisation: UK Main Market: Total data is updated monthly, averaging 2,256,749.813 GBP mn from Feb 2017 (Median) to Mar 2025, with 98 observations. The data reached an all-time high of 2,527,274.100 GBP mn in Feb 2025 and a record low of 1,618,175.400 GBP mn in Oct 2020. United Kingdom Market Capitalisation: UK Main Market: Total data remains active status in CEIC and is reported by London Stock Exchange. The data is categorized under Global Database’s United Kingdom – Table UK.Z004: London Stock Exchange: Market Capitalisation: Main Market.

United Kingdom UK: Market Capitalization: Listed Domestic Companies: % of GDP data was reported at 64.629 % in 2008. This records a decrease from the previous number of 125.114 % for 2007. United Kingdom UK: Market Capitalization: Listed Domestic Companies: % of GDP data is updated yearly, averaging 87.239 % from Dec 1975 (Median) to 2008, with 34 observations. The data reached an all-time high of 177.400 % in 1999 and a record low of 6.368 % in 1980. United Kingdom UK: Market Capitalization: Listed Domestic Companies: % of GDP data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s United Kingdom – Table UK.World Bank.WDI: Financial Sector. Market capitalization (also known as market value) is the share price times the number of shares outstanding (including their several classes) for listed domestic companies. Investment funds, unit trusts, and companies whose only business goal is to hold shares of other listed companies are excluded. Data are end of year values.; ; World Federation of Exchanges database.; Weighted average; Stock market data were previously sourced from Standard & Poor's until they discontinued their 'Global Stock Markets Factbook' and database in April 2013. Time series have been replaced in December 2015 with data from the World Federation of Exchanges and may differ from the previous S&P definitions and methodology.

*********** was the leading company in the United Kingdom by market capitalization as of October 11, 2024. Headquartered in Cambridge, England, the pharmaceutical and biotechnology company had a market capitalization of approximately ****** billion U.S. dollars.

The United Kingdom: Stock market capitalization, billion USD: The latest value from 2022 is 3095.98 billion U.S. dollars, a decline from 3799.46 billion U.S. dollars in 2021. In comparison, the world average is 1225.97 billion U.S. dollars, based on data from 75 countries. Historically, the average for the United Kingdom from 1975 to 2022 is 1673.7 billion U.S. dollars. The minimum value, 30.1 billion U.S. dollars, was reached in 1979 while the maximum of 3946.88 billion U.S. dollars was recorded in 2013.

United Kingdom UK: Market Capitalization: Listed Domestic Companies data was reported at 1,868.153 USD bn in 2008. This records a decrease from the previous number of 3,846.462 USD bn for 2007. United Kingdom UK: Market Capitalization: Listed Domestic Companies data is updated yearly, averaging 972.400 USD bn from Dec 1975 (Median) to 2008, with 34 observations. The data reached an all-time high of 3,846.462 USD bn in 2007 and a record low of 30.096 USD bn in 1979. United Kingdom UK: Market Capitalization: Listed Domestic Companies data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s United Kingdom – Table UK.World Bank.WDI: Financial Sector. Market capitalization (also known as market value) is the share price times the number of shares outstanding (including their several classes) for listed domestic companies. Investment funds, unit trusts, and companies whose only business goal is to hold shares of other listed companies are excluded. Data are end of year values converted to U.S. dollars using corresponding year-end foreign exchange rates.; ; World Federation of Exchanges database.; Sum; Stock market data were previously sourced from Standard & Poor's until they discontinued their 'Global Stock Markets Factbook' and database in April 2013. Time series have been replaced in December 2015 with data from the World Federation of Exchanges and may differ from the previous S&P definitions and methodology.

This statistic displays the total market value of financial companies on the London Stock Exchange (LSE) from ************ to *************. During the first three months of 2020, the LSE along with other major markets took a huge hit due to the global coronavirus pandemic. In 2022, since the Russia-Ukraine war started, financial markets took another hit. As of *************, the total market capitalization of financial companies listed on the LSE amounted to ****** billion British pounds.

United Kingdom's main stock market index, the GB100, fell to 9690 points on December 2, 2025, losing 0.13% from the previous session. Over the past month, the index has declined 0.12%, though it remains 15.91% higher than a year ago, 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 December of 2025.

United Kingdom Market Capitalisation: AIM: Basic Materials data was reported at 5,260.048 GBP mn in Oct 2018. This records a decrease from the previous number of 5,688.683 GBP mn for Sep 2018. United Kingdom Market Capitalisation: AIM: Basic Materials data is updated monthly, averaging 7,985.973 GBP mn from Jan 2006 (Median) to Oct 2018, with 154 observations. The data reached an all-time high of 20,688.600 GBP mn in Mar 2007 and a record low of 3,683.827 GBP mn in Jan 2016. United Kingdom Market Capitalisation: AIM: Basic Materials data remains active status in CEIC and is reported by London Stock Exchange. The data is categorized under Global Database’s United Kingdom – Table UK.Z006: London Stock Exchange: Market Capitalisation: AIM Market.

United Kingdom Market Capitalization: LSE: Annual: AIM data was reported at 80,814.083 GBP mn in 2016. This records an increase from the previous number of 73,076.581 GBP mn for 2015. United Kingdom Market Capitalization: LSE: Annual: AIM data is updated yearly, averaging 47,164.398 GBP mn from Dec 1995 (Median) to 2016, with 22 observations. The data reached an all-time high of 97,561.046 GBP mn in 2007 and a record low of 2,382.400 GBP mn in 1995. United Kingdom Market Capitalization: LSE: Annual: AIM data remains active status in CEIC and is reported by London Stock Exchange. The data is categorized under Global Database’s United Kingdom – Table UK.Z004: London Stock Exchange: Market Capitalisation.

The market value of banks trading on the London Stock Exchange (LSE) fluctuated between June 2007 and December 2023. The lowest value during this period was observed in June 2020 at ****** billion British pounds, while the highest value was recorded in December 2016 at *** billion British pounds. As of December 2023, the market capitalization of banks listed on the LSE was over *** billion British pounds.

The United Kingdom: Stock market value traded, percent of GDP: The latest value from 2022 is 25.4 percent, a decline from 27.19 percent in 2021. In comparison, the world average is 34.95 percent, based on data from 74 countries. Historically, the average for the United Kingdom from 1975 to 2022 is 50.17 percent. The minimum value, 5.83 percent, was reached in 1979 while the maximum of 129.28 percent was recorded in 2010.

United Kingdom Market Capitalisation: UK Main Market: Consumer Services data was reported at 266,815.360 GBP mn in Oct 2018. This records a decrease from the previous number of 284,424.390 GBP mn for Sep 2018. United Kingdom Market Capitalisation: UK Main Market: Consumer Services data is updated monthly, averaging 246,913.436 GBP mn from Feb 2017 (Median) to Oct 2018, with 21 observations. The data reached an all-time high of 284,424.390 GBP mn in Sep 2018 and a record low of 236,458.395 GBP mn in Feb 2017. United Kingdom Market Capitalisation: UK Main Market: Consumer Services data remains active status in CEIC and is reported by London Stock Exchange. The data is categorized under Global Database’s UK – Table UK.Z005: London Stock Exchange: Market Capitalisation: Main Market.

As of May 2025, the pharmaceutical company AstraZeneca was the leading company listed on the London Exchange (LSE), with a market capitalization of 159 billion British pounds. This made them the largest of all companies listed on the LSE. Seen as the heart of the global financial community, the London Stock Exchange is the second-largest stock market in Europe and ranks eighth globally. Key information The London Stock Exchange (LSE) is among the largest stock market operators globally and ranks 11th in terms of the oldest stock exchanges in existence, with 224 years of operation as of 2025. Performance after Covid The COVID-19 pandemic had a profound effect on the global economy, causing considerable volatility on the stock market. The London Stock Exchange (LSE) saw a notable decline in the market capitalization value of its listed companies, reaching its lowest value in March 2020 at approximately three trillion British pounds in correlation with a surge in the average daily number of trades, which peaked at over two billion. Following this initial reaction, the LSE observed a decrease in the average daily active traders, alongside a gradual recovery in the market capitalization of the listed companies.