Updated 1 November 2026 · from filed accounts
The 10 biggest companies in South East
Reckitt is the biggest company registered in South East by turnover, with £14.2bn in its latest filed accounts. Haleon and Serco Group follow. Together the 10 companies below turned over £46.1bn in their latest filed years.
- 1Reckitt
Berkshire · Other · FY to Dec 2025
£14.2bn
+0.3% on the year before
- 2Haleon
Weybridge · Other · FY to Dec 2025
£11bn
-1.8% on the year before
- 3Serco Group
Bartley Way Hook · Other · FY to Dec 2025
£4.88bn
+1.9% on the year before
- 4Taylor Wimpey
High Wycombe · Other · FY to Dec 2025
£3.84bn
+13% on the year before
- 5Halma
Amersham · Other · FY to Mar 2026
£2.58bn
+15% on the year before
- 6Berkeley Group Holdings
Cobham · Other · FY to Apr 2026
£2.38bn
-4.2% on the year before
- 7Micron Europe
Bracknell · Other · FY to Aug 2025
£2.19bn
+27% on the year before
- 8QinetiQ
Farnborough · Other · FY to Mar 2026
£1.92bn
-0.5% on the year before
- 9Michael Page
Addlestone · Other · FY to Dec 2025
£1.6bn
-8.2% on the year before
- 10Mitsubishi HC Capital UK
Staines-Upon-Thames · Finance & payments · FY to Mar 2026
£1.48bn
+6.7% 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.
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