- ALEXANDER SANDISON & SONS LIMITEDDissolved- SC014752 - Dissolved on 25 May 2009 
- S SANDISON ELECTRICAL LIMITED- 10367891 - Incorporated on 9 September 2016 
- CAS DUNCAN LTD- SC660201 - Incorporated on 30 April 2020 
- CODEVITY LIMITED- 06729698 - Incorporated on 22 October 2008 
- IAN DUNCAN CONSTRUCTION SITE MANAGEMENT SERVICES LTDDissolved- 06209473 - Dissolved on 9 October 2012 
- DUNCAN 50 LTDActive - Proposal to Strike off- 09345360 - Incorporated on 8 December 2014 
- N L A DUNCAN LTD- 09024084 - Incorporated on 6 May 2014 
- DUNCAN 52 LTDActive - Proposal to Strike off- 11050321 - Incorporated on 7 November 2017 
- OUT FOR LUNCH LTD.Dissolved- SC266528 - Dissolved on 6 April 2012 
- JAMIESON CORPORATE FINANCE LLP- OC308682 - Incorporated on 16 July 2004 
- S.E. DUNCAN LTD- SC432407 - Incorporated on 12 September 2012 
- DUNCAN 123 LTDActive - Proposal to Strike off- 08955770 - Incorporated on 24 March 2014 
- DUNCAN 444 LTDActive - Proposal to Strike off- 11698545 - Incorporated on 27 November 2018 
- DUNCAN 444 LTDActive - Proposal to Strike off- 09826488 - Incorporated on 15 October 2015 
- DUNCAN 524. LTDActive - Proposal to Strike off- 11060720 - Incorporated on 13 November 2017 
- A K DUNCAN LTDDissolved- 04439595 - Dissolved on 29 December 2009 
- E.J. DUNCAN LTD- 03221200 - Incorporated on 5 July 1996 
- A K DUNCAN (2008) LTD- 06659970 - Incorporated on 30 July 2008 
- DUNCAN 121 LTDDissolved- 06768273 - Dissolved on 20 July 2010 
- VELOCITY ELECTRICAL SURREY LTD- 13064923 - Incorporated on 6 December 2020