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Home » Global CEO Forum » The United Kingdom’s Largest Companies by market capitalization, 2024
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The United Kingdom’s Largest Companies by market capitalization, 2024

As of February 18, 2025, AstraZeneca is the most valuable company in the United Kingdom, with a market cap of $229 billion. Following it are Shell ($206 billion) and HSBC HOLDINGS PLC ($193 billion).

Which one is the most valuable in the United Kingdom by market cap? This list comprises the biggest companies currently in the United Kingdom by market cap in 2024:

United Kingdom's Largest Companies by market capitalization, 2024

RANKCOMPANYMARKET CAPITAL (USD DOLLAR)
1ASTRAZENECA PLC$229 billion
2SHELL PLC$206 billion
3HSBC HOLDINGS PLC$193 billion
4UNILEVER PLC$137 billion
5RIO TINTO PLC$108 billion
6RELX PLC$95.12 billion
7BP PLC$92.35 billion
8BRITISH AMERICAN TOBACCO P.L.C.$85.74 billion
9LONDON STOCK EXCHANGE GROUP PLC$78.17 billion
10GSK PLC$73.85 billion
11ROLLS-ROYCE HOLDINGS PLC$66.57 billion
12COMPASS GROUP PLC$60.69 billion
13DIAGEO PLC$60.12 billion
14NATIONAL GRID PLC$59.05 billion
15GLENCORE PLC$54.15 billion
16BARCLAYS PLC$53.5 billion
173I GROUP PLC$49.6 billion
18LLOYDS BANKING GROUP PLC$48.97 billion
19BAE SYSTEMS PLC$46.15 billion
20EXPERIAN PLC$45.48 billion
21RECKITT BENCKISER GROUP PLC$45.06 billion
22HALEON PLC$43.88 billion
23NATWEST GROUP PLC$43.44 billion
24ANGLO AMERICAN PLC$37.65 billion
25STANDARD CHARTERED PLC$33.81 billion
26TESCO PLC$33.49 billion
27IMPERIAL BRANDS PLC$29.01 billion
28ASHTEAD GROUP PLC$27.78 billion
29PRUDENTIAL PLC$24.15 billion
30ANTOFAGASTA PLC$22.83 billion

Market capitalization, commonly known as market cap, refers to the total market value of a company’s outstanding shares. It is calculated by multiplying the current stock price by the total number of shares outstanding. For example, if a company has 2.34 billion shares outstanding and its stock price is $66.66 per share, its market cap would be $156 billion (2,340,000,000 x $66.66). Investors often use the market cap as a quick estimate of a company’s overall value and as a factor in determining whether to buy a stock. Stocks are often categorized by market cap: mega-cap ($100 billion-plus), large-cap ($10 billion-$100 billion), mid-cap ($2 billion-$10 billion), small-cap ($300 million-$2 billion), and micro-cap (less than $300 million).

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Christina Miller, Ph.D.
Dr. Christina Miller, PhD in Public Narrative and Media Ethics, is Associate News Editor at CEOWORLD Magazine, specialising in economics, global trade, financial forecasting, corporate...

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