The UK market includes some of the world’s most valuable corporations. Which companies rank highest by market value today?
We’ve compiled the largest UK-listed companies by market capitalisation – calculated by multiplying the share price by total outstanding shares – as of 30 April 2026.
Below are the leading UK-listed companies by market capitalisation as of 30 April 2026. Market caps are shown in US dollars (USD), together with their latest share prices.
| Rank | Company | Market cap (USD) | Share price (USD) |
|---|---|---|---|
| 1 | HSBC | $309.3bn | $89.28 |
| 2 | AstraZeneca | $287.1bn | $185.20 |
| 3 | Shell | $248bn | $88.91 |
| 4 | Linde | $233.9bn | $504.71 |
| 5 | Arm Holdings | $214.2bn | $201.69 |
| 6 | Rio Tinto | $156.9bn | $96.49 |
| 7 | Rolls-Royce Holdings | $128bn | $15.40 |
| 8 | British American Tobacco | $124.3bn | $57.45 |
| 9 | Unilever | $124.3bn | $56.90 |
| 10 | BP | $120.5bn | $46.80 |
The information on this page is based on public company disclosures and filings. It is provided for informational purposes only and does not constitute investment advice or a recommendation to trade. Figures are accurate as of the stated date and may be updated without notice.
Market capitalisation is the total value of a company's outstanding shares, calculated by multiplying its share price by the number of shares in issue. If a company has 200 million diluted shares outstanding and its shares close at $20, its market cap is $4 billion. Because share prices move constantly, market cap changes with them, sometimes by billions of dollars across the UK's largest companies. That makes it a useful snapshot of how the market values a business at a given time, rather than a fixed measure of its underlying performance. Companies near the top of the UK rankings, such as HSBC and AstraZeneca, tend to combine large operating scale with share prices that have remained relatively well supported over time.
The FTSE 100 moved above 10,000 points for the first time in January 2026 after rising nearly 22% in 2025, its strongest annual gain since 2009 (Reuters, 2 January 2026). By late April 2026, the UK's GB100 index stood near 10,213 points, despite falling around 5.29% over the previous month amid broader global uncertainty. Even so, it remained about 18% higher year on year. Analysts forecast a further 14% advance in FTSE 100 pre-tax profits in 2026, with aggregate earnings expected to reach a record £264bn that year and rise further to £288bn in 2027 (Yahoo Finance, 1 April 2026). Taken together, those figures show how short-term market moves and longer-term earnings expectations can point in different directions.
The 10 largest UK-listed companies span several major sectors, including energy, financials, healthcare, industrials and consumer goods. Shell and BP reflect the market's long-standing exposure to oil and gas, while HSBC remains the UK's largest bank by market value. AstraZeneca represents healthcare, and Arm Holdings highlights the UK's technology presence through semiconductor IP licensing. Mining, aerospace and finance together drove over 70% of the FTSE 100's gains in 2025 and continued to act as key drivers at the start of 2026 (Motley Fool, 19 January 2026). In Q1 2026, energy was the best-performing global sector, with the Morningstar Global Energy Index up 35.08% in euro terms – its strongest start to a year on record (Morningstar, 15 April 2026). Sector leadership like this can have a clear effect on the wider market.
One of the main market themes in 2026 has been a shift away from growth-focused technology stocks towards value-oriented sectors. Energy was the leading sector globally in early 2026, up nearly 20% year to date by mid-February, while technology was the worst performer – creating a gap of more than 24 percentage points between the best and worst sectors, signalling meaningful dispersion (Morningstar, 19 February 2026). Energy stocks extended those gains through Q1 2026, driven by tight supply, strong cash flow and disciplined capital spending across upstream producers (Yahoo Finance, 3 April 2026). Because the FTSE 100 has relatively high weightings in energy, financials and materials, it behaves differently in this environment from indices with heavier exposure to technology – a characteristic that contributed to the FTSE 100 outperforming the S&P 500 in 2025 (Reuters, 2 January 2026). The rotation also reflects a broader valuation reassessment, with investors questioning whether AI-driven gains in technology could continue at the pace seen in 2023 and 2024 (Morningstar, 19 February 2026).
Learn more about market capitalisation.
Market capitalisation is the total value of a company’s shares in issue, calculated by multiplying the current share price by the number of shares outstanding. It’s a quick way to compare the relative size of publicly listed companies.
To trade UK share CFDs, you need to open and verify an account with an FCA-regulated provider. After depositing funds, locate the share you want to trade, set your position size, and choose to buy or sell. CFDs are traded on margin, leverage amplifies both profits and losses, and they don’t give ownership of the underlying shares. You can also apply risk management such as stop-loss orders. Standard stop-loss orders are not guaranteed. Guaranteed stop-loss orders (GSLOs) incur a fee if activated.
Start with research into a company’s financial position, competitive standing and sector outlook. Begin with small trades, use risk limits, and consider practising on a demo account before trading with real funds.
Large-cap stocks can be more stable than smaller companies because of their established businesses and diversified operations – but they are still exposed to market volatility, sector-specific risks and wider economic conditions. Past performance is not a reliable guide to future outcomes.
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