# The 10 biggest companies in London

The companies registered in London with the highest turnover in their latest filed accounts, ranked, with profit and growth.

J Sainsbury is the biggest company registered in London by turnover, with £33.6bn in its latest filed accounts. BAE Systems and British American Tobacco follow. Together the 10 companies below turned over £208bn in their latest filed years.

| Rank | Company | Town | Turnover | Year |
| ---: | --- | --- | ---: | --- |
| 1 | [J Sainsbury](https://firmfacts.co/company/j-sainsbury-00185647) | London | £33.6bn | FY to Feb 2026 |
| 2 | [BAE Systems](https://firmfacts.co/company/bae-systems-01470151) | London | £28.3bn | FY to Dec 2025 |
| 3 | [British American Tobacco](https://firmfacts.co/company/british-american-tobacco-plc-03407696) | London | £25.6bn | FY to Dec 2025 |
| 4 | [Rolls-Royce](https://firmfacts.co/company/rolls-royce-holdings-07524813) | London | £21.2bn | FY to Dec 2025 |
| 5 | [BT Group](https://firmfacts.co/company/bt-group-04190816) | London | £19.7bn | FY to Mar 2026 |
| 6 | [Associated British Foods](https://firmfacts.co/company/associated-british-foods-00293262) | London | £19.5bn | FY to Sept 2025 |
| 7 | [National Grid](https://firmfacts.co/company/national-grid-04031152) | London | £17.7bn | FY to Mar 2026 |
| 8 | [Marks & Spencer](https://firmfacts.co/company/marks-and-spencer-group-plc-04256886) | London | £17.3bn | FY to Mar 2026 |
| 9 | [Kingfisher](https://firmfacts.co/company/kingfisher-01664812) | London | £12.9bn | FY to Jan 2026 |
| 10 | [International Distribution Services](https://firmfacts.co/company/international-distribution-services-08680755) | London | £12.7bn | FY to Mar 2024 |

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Updated 2026-10-29 from the latest filed accounts at Companies House (Open Government Licence v3.0). Page: https://firmfacts.co/blog/biggest-companies-in-london