- JEFFRIES RADIOVISION LIMITED- 01213145 - Incorporated on 20 May 1975 
- JEFFRIES CATERING LIMITED- 08337044 - Incorporated on 19 December 2012 
- JEFFRIES CONSTRUCTION LIMITED- 09349904 - Incorporated on 10 December 2014 
- POLLY JEFFRIES LIMITED- 13490626 - Incorporated on 2 July 2021 
- JEFFRIES COMMISSIONING LTD- 11292699 - Incorporated on 5 April 2018 
- JEFFRIES & PARTNERS LIMITED- 03185348 - Incorporated on 12 April 1996 - 112-114 London Road, Northend, PO2 0LZ 
- JEFFRIES ENTERPRISE LIMITEDDisolved- 14190109 - Dissolved on 28 November 2023 
- JEFFRIES SERVICES LTD- 15319320 - Incorporated on 30 November 2023 
- JEFFRIES ENTERPRISES LTD- 15481028 - Incorporated on 10 February 2024 
- JEFFRIES EYECARE LTD- 15569037 - Incorporated on 16 March 2024 
- JEFFRIES ONLINE LTD- 14346530 - Incorporated on 9 September 2022 
- CM JEFFRIES GROUP LTDDisolved- 13421076 - Dissolved on 12 December 2023 
- GWYNSSON CIC- 15370817 - Incorporated on 27 December 2023 
- TY GWYN PETS LTD- 14026828 - Incorporated on 5 April 2022 - Chester Road, Padeswood, CH7 4JF 
- GWYN MEDIA LTDDisolved- 14088016 - Dissolved on 14 March 2023 
- GWYNFRYN LTDDisolved- 13569521 - Dissolved on 23 January 2024 
- GWYN JAMES LLPDisolved- OC367654 - Dissolved on 6 February 2024 
- GWYNELLE LTDActive - Proposal to Strike off- 12373659 - Incorporated on 20 December 2019 
- GWYNYNEA LTDDisolved- 12403870 - Dissolved on 5 July 2022 
- GWYNYLIS LTDActive - Proposal to Strike off- 12394276 - Incorporated on 9 January 2020