- MARK JOHN ENTERPRISE LIMITEDDisolved- 07979996 - Dissolved on 13 June 2023 
- MARK JOHN HUTCHISON LTDActive - Proposal to Strike off- 07812988 - Incorporated on 17 October 2011 
- JOHN MARK DEVELOPMENTS LIMITEDDisolved- 04244817 - Dissolved on 7 May 2024 
- MARK ALEXANDER JOHN LTDDisolved- SC687162 - Dissolved on 28 June 2022 
- MARK JOHN HOWARD LIMITED- 16509115 - Incorporated on 10 June 2025 
- A-LIST MARKETING GROUP LIMITED- 15482536 - Incorporated on 11 February 2024 
- JOHN MARKHAM LTD- 12339920 - Incorporated on 29 November 2019 
- MARK JOHN HUTCHINSON LTDActive - Proposal to Strike off- 07810010 - Incorporated on 14 October 2011 
- JOHN CONNOR PA LIMITED- 04523464 - Incorporated on 2 September 2002 
- JOHN P. O'CONNELL LIMITED- 09002683 - Incorporated on 17 April 2014 
- LAIPING CONN LIMITEDDisolved- 14961108 - Dissolved on 3 December 2024 
- JAMIE CONN LTD- SC792328 - Incorporated on 13 December 2023 
- CONN & FENTON LIMITED- NI688413 - Incorporated on 24 May 2022 
- CJ CONN LTDActive - Proposal to Strike off- 10085301 - Incorporated on 25 March 2016 
- VIRTUAL CONN LTD- 09751214 - Incorporated on 27 August 2015 
- CONN SECURITIES LIMITED- 03431091 - Incorporated on 9 September 1997 
- CONN TINNEY LIMITEDActive - Proposal to Strike off- NI657313 - Incorporated on 22 November 2018 
- AGRI-CONN LIMITEDDisolved- 12651969 - Dissolved on 12 September 2023 
- CONN APP LIMITEDActive - Proposal to Strike off- 06357308 - Incorporated on 31 August 2007 
- CONN & MCHUGH LTDActive - Proposal to Strike off- NI620887 - Incorporated on 11 October 2013