The United Kingdom’s Largest Companies by market capitalization, 2024
As of January 14, 2025, AstraZeneca is the most valuable company in the United Kingdom, with a market cap of $204 billion. Following it are Shell ($201 billion) and HSBC HOLDINGS PLC ($171 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 | $204 billion |
| 2 | SHELL PLC | $201 billion |
| 3 | HSBC HOLDINGS PLC | $171 billion |
| 4 | UNILEVER PLC | $136 billion |
| 5 | RIO TINTO PLC | $101 billion |
| 6 | RELX PLC | $84.89 billion |
| 7 | BP PLC | $82.87 billion |
| 8 | BRITISH AMERICAN TOBACCO P.L.C. | $78.55 billion |
| 9 | LONDON STOCK EXCHANGE GROUP PLC | $74.59 billion |
| 10 | GSK PLC | $66.03 billion |
| 11 | DIAGEO PLC | $64.61 billion |
| 12 | ROLLS-ROYCE HOLDINGS PLC | $58.3 billion |
| 13 | COMPASS GROUP PLC | $55.21 billion |
| 14 | NATIONAL GRID PLC | $54.4 billion |
| 15 | GLENCORE PLC | $53.79 billion |
| 16 | BARCLAYS PLC | $45.59 billion |
| 17 | BAE SYSTEMS PLC | $42.84 billion |
| 18 | 3I GROUP PLC | $41.72 billion |
| 19 | RECKITT BENCKISER GROUP PLC | $40.82 billion |
| 20 | HALEON PLC | $40.53 billion |
| 21 | EXPERIAN PLC | $40.44 billion |
| 22 | LLOYDS BANKING GROUP PLC | $39.13 billion |
| 23 | NATWEST GROUP PLC | $37.32 billion |
| 24 | ANGLO AMERICAN PLC | $36.15 billion |
| 25 | STANDARD CHARTERED PLC | $29.54 billion |
| 26 | TESCO PLC | $29.35 billion |
| 27 | IMPERIAL BRANDS PLC | $25.92 billion |
| 28 | ASHTEAD GROUP PLC | $25.79 billion |
| 29 | VODAFONE GROUP PLC | $20.72 billion |
| 30 | SSE PLC | $20.61 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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