Largest companies by market cap (UK)
The largest companies in the covered catalog by market capitalization (delayed market data, shown with its as-of date).
22 covered companies were left out of this ranking because their last price predates 2026-08-04 (CBC, CCRN, CPRX, ECHO, EEX, ESPR, FJET, GLXY, GTLS, IBEX, KORE, NFBK, and 10 more), more than 3 trading sessions behind the 2026-08-11 price the rest of the catalog carries. Every figure here is price-derived, so ranking a stale price beside a current one would order them wrongly. Those companies keep the price on their own page, with their own as-of date.
Ranked by market cap, AstraZeneca (AZN.L) leads the covered catalog at £249.1B.
| # | Company | Sector | Market cap | P/E | 1-year return |
|---|---|---|---|---|---|
| 1 | AstraZeneca (AZN.L) | — | £249.1B | n/a | +8.6% |
| 2 | Barclays (BARC.L) | — | £94.0B | n/a | +42.5% |
| 3 | BAE Systems (BA.L) | — | £90.0B | n/a | +26.2% |
| 4 | Anglo American plc (AAL.L) | — | £64.0B | n/a | +87.5% |
| 5 | Aviva (AV.L) | — | £28.9B | n/a | +9.5% |
| 6 | Associated British Foods (ABF.L) | — | £20.2B | n/a | -3.8% |
| 7 | Airtel Africa (AAF.L) | — | £16.2B | n/a | +56.9% |
| 8 | Beazley (BEZ.L) | — | £10.5B | n/a | +39.8% |
| 9 | Lion Finance Group (BGEO.L) | — | £7.2B | n/a | +59.1% |
| 10 | Aberdeen Group (ABDN.L) | — | £6.3B | n/a | +24.4% |
| 11 | British Land (BLND.L) | — | £6.0B | n/a | +24.8% |
| 12 | Balfour Beatty (BBY.L) | — | £5.7B | n/a | +59.0% |
| 13 | Burberry Group (BRBY.L) | — | £5.7B | n/a | -5.3% |
| 14 | Autotrader Group (AUTO.L) | — | £5.5B | n/a | -37.7% |
| 15 | Berkeley Group Holdings (BKG.L) | — | £4.5B | n/a | -2.1% |
| 16 | Bridgepoint Group (BPT.L) | — | £4.1B | n/a | +0.5% |
| 17 | AJ Bell (AJB.L) | — | £3.2B | n/a | +16.7% |
| 18 | BH Macro (BHMG.L) | — | £2.6B | n/a | +8.0% |
| 19 | Bodycote (BOY.L) | — | £2.1B | n/a | +43.8% |
| 20 | Breedon Group (BREE.L) | — | £1.7B | n/a | -4.8% |
| 21 | AEP Plantations (AEP.L) | — | £912M | n/a | +89.9% |
| 22 | AO World (AO.L) | — | £757M | n/a | +10.7% |
| 23 | Hollywood Bowl Group (BOWL.L) | — | £642M | n/a | +12.8% |
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Data: London Stock Exchange market data (delayed daily-close). Every figure is shown with its as-of date on the company page; a company with no data for this metric is excluded from the ranking, never estimated.
Last updated 2026-08-12 — rankings shift as the underlying data refreshes.
Informational only — NOT financial advice. All figures are delayed daily-close data from London Stock Exchange market data, shown with their as-of date.