- JOHN DUFFY LTD- 14775400 - Incorporated on 3 April 2023 
- JOHN DUFFY LTDDisolved- NI030163 - Dissolved on 1 November 2022 
- CHRIS DUFFY (UK) LLP- OC330949 - Incorporated on 29 August 2007 
- CHRIS DUFFY LIMITED- SC255460 - Incorporated on 5 September 2003 
- CHRIS DUFFY PROPERTY LTD- 08810517 - Incorporated on 11 December 2013 
- DON TRANSPORT (NI) LTDActive - Proposal to Strike off- NI621100 
- MR. JOHN NEEDisolved- NI610586 - Dissolved on 18 June 2024 
- CHRIS DUFFY CONSULTING LIMITEDDisolved- 10897640 - Dissolved on 23 July 2024 
- JD SAFETY SERVICES LTD- 14747957 - Incorporated on 22 March 2023 - Brown Lane, Heald Green, SK8 3RL 
- TLCJ MR N A JOHNSON LIMITEDDisolved- 12680774 - Dissolved on 30 January 2024 
- MR AND MRS JOHNCOCK LTDDissolved- 09566798 - Dissolved on 8 May 2018 
- JOHN DUFFY GROUP LIMITEDDissolved- 06724869 - Dissolved on 21 October 2014 
- JOHN DUFFY HAULAGE LIMITEDDissolved- 06724758 - Dissolved on 4 June 2013 
- JOHN DUFFY CONSTRUCTION LIMITEDActive - Proposal to Strike off- 06724829 - Incorporated on 15 October 2008 
- MR CHRIS COLLINS- NI620815 - Incorporated on 8 October 2013 
- JOHN DUFFY INVESTMENTS LIMITEDDisolved- 12737771 - Dissolved on 19 September 2023 
- CHRIS & JOHN LTDDissolved- 07493610 - Dissolved on 28 August 2012 
- CHRIS JOHN LTD.- 07197719 - Incorporated on 22 March 2010 
- JOHN CHRIS LTD- 12819367 - Incorporated on 17 August 2020 
- JOHN&CHRIS LTD- 11085857 - Incorporated on 28 November 2017