Updated 28 October 2026 · from filed accounts
The 10 biggest companies in London
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.
- 1J Sainsbury
London · Grocery & retail · FY to Feb 2026
£33.6bn
+2.7% on the year before
- 2BAE Systems
London · Other · FY to Dec 2025
£28.3bn
+7.7% on the year before
- 3British American Tobacco
London · Other · FY to Dec 2025
£25.6bn
-1.0% on the year before
- 4Rolls-Royce
London · Other · FY to Dec 2025
£21.2bn
+12% on the year before
- 5BT Group
London · Other · FY to Mar 2026
£19.7bn
-3.5% on the year before
- 6Associated British Foods
London · Other · FY to Sept 2025
£19.5bn
-3.1% on the year before
- 7National Grid
London · Other · FY to Mar 2026
£17.7bn
-3.8% on the year before
- 8Marks & Spencer
London · Grocery & retail · FY to Mar 2026
£17.3bn
+25% on the year before
- 9Kingfisher
London · Other · FY to Jan 2026
£12.9bn
+1.3% on the year before
- 10International Distribution Services
London · Other · FY to Mar 2024
£12.7bn
+5.3% on the year before
How this list is made
From each company's latest accounts filed at Companies House, or its annual report for listed groups: the figures as filed, nothing estimated. Changes compare the two latest filed years. Only companies that report in pounds are ranked; groups that report in dollars or euros aren't converted. Subsidiaries whose figures are part of a listed group's are counted once, in the group. Updated daily as new accounts are filed.