- FENNY CONS LTDDisolved- 14012949 - Dissolved on 5 September 2023 
- COED Y FENNI LTD- 16558702 - Incorporated on 3 July 2025 
- FENNER GROUP HOLDINGS LIMITED- 00329377 - Incorporated on 1 July 1937 
- FENNERDON LLP- OC361862 - Incorporated on 16 February 2011 
- ROSE & FENNEL LTDActive - Proposal to Strike off- 10076836 - Incorporated on 22 March 2016 
- FENNECART LTDDisolved- 15280224 - Dissolved on 22 April 2025 
- RAYS & RAYS LTD- 14664884 - Incorporated on 15 February 2023 
- CODRINGHER & FENN LIMITED- 14905954 - Incorporated on 31 May 2023 
- FENN CONTRACTS LLPDissolved- OC302306 - Dissolved on 30 April 2008 
- SIROKH FENN LIMITEDActive - Proposal to Strike off- 04553943 - Incorporated on 4 October 2002 
- FENN LANDSCAPES LIMITEDDisolved- 05713826 - Dissolved on 11 October 2022 
- FENN SOFTWARE LIMITEDDissolved- 02827814 - Dissolved on 18 October 2011 
- CHRISTIAN FENN LIMITEDActive - Proposal to Strike off- 07153632 - Incorporated on 10 February 2010 
- FENN NORGE LIMITED- 07522348 - Incorporated on 9 February 2011 
- FENN & PICKERING LIMITEDDisolved- 03878652 - Dissolved on 18 January 2022 
- FENN INVESTMENTS LIMITED- 08592448 - Incorporated on 1 July 2013 
- TEAM FENN LIMITED- 08738301 - Incorporated on 18 October 2013 
- FENN BUSINESS LTD- 12876320 - Incorporated on 13 September 2020 
- FENN TRAPS LIMITEDDisolved- 11324597 - Dissolved on 24 May 2022 
- FENN GRIFFIN LIMITED- 11738571 - Incorporated on 21 December 2018