- NEIL HARRIS PLUMBING AND HEATING LIMITED- 07590690 - Incorporated on 4 April 2011 
- DAVID O'NEIL WELL SERVICES LIMITEDDissolved- SC350755 - Dissolved on 3 August 2012 
- DAVID NEILSON AGENCIES LIMITED- SC097810 - Incorporated on 13 March 1986 
- NEIL HARRISON CONSULTING LIMITEDDisolved- 04768423 - Dissolved on 30 November 2021 
- DAVID HARRIS (BESPOKE INTERIORS) LIMITEDDissolved- 04346666 - Dissolved on 18 October 2013 
- DAVID HARRIS MILITARY ENGINEERING LTDActive - Proposal to Strike off- 10350432 - Incorporated on 30 August 2016 
- DAVID O'NEILL ASSOCIATES LIMITED- SC574656 - Incorporated on 25 August 2017 
- DAVID HARRIS PRESTIGE CARS LIMITED- 12965868 - Incorporated on 21 October 2020 
- JACK DAVID HARRIS DECORATORS LIMITEDActive - Proposal to Strike off- 10597073 - Incorporated on 2 February 2017 
- DAVID HARRIS PARTITIONS & CEILINGS LIMITEDDisolved- 04159194 - Dissolved on 4 July 2023 
- DAVID OGILVIE-O'NEIL DESIGN LIMITED- SC321601 - Incorporated on 19 April 2007 
- NEIL DAVIDGE PRODUCTIONS LIMITED- 04610621 - Incorporated on 6 December 2002 
- DAVID HARRISON DESIGN LIMITEDActive - Proposal to Strike off- 06780541 - Incorporated on 29 December 2008 
- DAVID HARRISON (IMPORTS) LIMITED- 01836967 - Incorporated on 30 July 1984 
- DAVID HARRISON PRINTING LIMITEDActive - Proposal to Strike off- 04319310 - Incorporated on 8 November 2001 
- DAVID HARRISON SERVICES LIMITEDDisolved- 04915881 - Dissolved on 16 May 2023 
- HARRISON DAVID MOVEMENT LIMITEDDisolved- 14123350 - Dissolved on 24 October 2023 
- DAVID HARRISON PROPERTY LIMITED- SC298087 - Incorporated on 3 March 2006 
- DAVID NEILL ENGINEERING SOLUTIONS LTD- NI633126 - Incorporated on 20 August 2015 
- JONES ENGINEERING GROUP LIMITED- 06553548 - Incorporated on 3 April 2008