- COLM BYRNE ELECTRICAL LIMITEDActive - Proposal to Strike off- 08551719 - Incorporated on 31 May 2013 
- DAVID O'BYRNE LTD- 14231001 - Incorporated on 13 July 2022 
- MR J P BYRNE LIMITED- 09769284 - Incorporated on 9 September 2015 
- COLIN BYRNE ROV LIMITEDActive - Proposal to Strike off- 08362443 - Incorporated on 16 January 2013 
- MR DAVID P C LTD- 16409026 - Incorporated on 25 April 2025 
- MR COLIN WU LIMITED- SC478901 - Incorporated on 30 May 2014 
- MRH DAVID LTDActive - Proposal to Strike off- 11325633 - Incorporated on 24 April 2018 
- COLIN DAVID RUSS LLPDissolved- OC347076 - Dissolved on 28 June 2016 
- DAVID BYRNE CATERING LTDActive - Proposal to Strike off- 08820437 - Incorporated on 19 December 2013 
- MR A W DAVIDSON LTD- 07957458 - Incorporated on 21 February 2012 
- DAVID BYRNE TRANSPORT LTD- NI697876 - Incorporated on 5 June 2023 
- DAVID BYRNE EDUCATION LIMITED- 07477896 - Incorporated on 23 December 2010 
- MR DAVID HAILS LTDDisolved- 14066091 - Dissolved on 14 February 2023 
- MR DAVID PEREZ LTD- 11853572 - Incorporated on 28 February 2019 
- MR DAVID BRADY LTD.Active - Proposal to Strike off- 10943286 - Incorporated on 4 September 2017 
- COLIN DAVIDSON LIMITED- NI064106 - Incorporated on 16 April 2007 
- MR THOMAS DAVID LTDDisolved- 15351641 - Dissolved on 3 June 2025 
- BYRNE & BYRNE LTD.- 07766700 - Incorporated on 8 September 2011 
- DAVID BYRNE DRIVER HIRE LIMITED- 06653637 - Incorporated on 23 July 2008 
- MR DAVID SHAW LIMITEDDissolved- 06674205 - Dissolved on 23 March 2010