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
| RANK | COMPANY | MARKET CAPITAL (USD DOLLAR) |
|---|---|---|
| 1 | ASTRAZENECA PLC | $229 billion |
| 2 | SHELL PLC | $206 billion |
| 3 | HSBC HOLDINGS PLC | $193 billion |
| 4 | UNILEVER PLC | $137 billion |
| 5 | RIO TINTO PLC | $108 billion |
| 6 | RELX PLC | $95.12 billion |
| 7 | BP PLC | $92.35 billion |
| 8 | BRITISH AMERICAN TOBACCO P.L.C. | $85.74 billion |
| 9 | LONDON STOCK EXCHANGE GROUP PLC | $78.17 billion |
| 10 | GSK PLC | $73.85 billion |
| 11 | ROLLS-ROYCE HOLDINGS PLC | $66.57 billion |
| 12 | COMPASS GROUP PLC | $60.69 billion |
| 13 | DIAGEO PLC | $60.12 billion |
| 14 | NATIONAL GRID PLC | $59.05 billion |
| 15 | GLENCORE PLC | $54.15 billion |
| 16 | BARCLAYS PLC | $53.5 billion |
| 17 | 3I GROUP PLC | $49.6 billion |
| 18 | LLOYDS BANKING GROUP PLC | $48.97 billion |
| 19 | BAE SYSTEMS PLC | $46.15 billion |
| 20 | EXPERIAN PLC | $45.48 billion |
| 21 | RECKITT BENCKISER GROUP PLC | $45.06 billion |
| 22 | HALEON PLC | $43.88 billion |
| 23 | NATWEST GROUP PLC | $43.44 billion |
| 24 | ANGLO AMERICAN PLC | $37.65 billion |
| 25 | STANDARD CHARTERED PLC | $33.81 billion |
| 26 | TESCO PLC | $33.49 billion |
| 27 | IMPERIAL BRANDS PLC | $29.01 billion |
| 28 | ASHTEAD GROUP PLC | $27.78 billion |
| 29 | PRUDENTIAL PLC | $24.15 billion |
| 30 | ANTOFAGASTA 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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