- GILLIAN SUMNER REGULATORY SERVICES LIMITEDActive - Proposal to Strike off- 05211317 - Incorporated on 20 August 2004 
- J.N. SUMNER- 08248104 - Incorporated on 10 October 2012 
- SUMNER & SUMNER HOLDINGS LTD- 14103342 - Incorporated on 12 May 2022 
- V SUMNER LTD- 15512960 - Incorporated on 22 February 2024 
- K SUMNER LTDDisolved- 11322365 - Dissolved on 12 December 2023 
- R T SUMNER LTDActive - Proposal to Strike off- 09588927 - Incorporated on 13 May 2015 
- M C SUMNER LTD- 09232899 - Incorporated on 24 September 2014 
- 170 SUMNER LLPActive - Proposal to Strike off- OC392759 - Incorporated on 17 April 2014 
- SUMNER & CO LTDDisolved- 08524609 - Dissolved on 28 November 2023 
- SN SUMNER LTDActive - Proposal to Strike off- 13999544 - Incorporated on 24 March 2022 
- RED BIRD TECHNOLOGY LTDDisolved- 09979521 - Dissolved on 12 October 2021 
- PG SUMNER LTDDisolved- 13742867 - Dissolved on 8 August 2023 
- AF SUMNER LTD- 14147765 - Incorporated on 2 June 2022 
- SU SUMNER LTDDisolved- 13992174 - Dissolved on 2 July 2024 
- BO SUMNER LTDDisolved- 13704155 - Dissolved on 21 March 2023 
- XR SUMNER LTDDisolved- 13745939 - Dissolved on 22 April 2025 
- EG SUMNER LTDDisolved- 13667679 - Dissolved on 9 April 2024 
- XY SUMNER LTDDisolved- 14117191 - Dissolved on 3 October 2023 
- MRS & MRS LIMITEDActive - Proposal to Strike off- 09898454 - Incorporated on 2 December 2015 
- WW SUMNER LTDDisolved- 14089802 - Dissolved on 16 July 2024