- LEXDEX LIMITEDDisolved- 11535739 - Dissolved on 7 March 2023 
- MR DUNCAN ROY LTDDisolved- 13244435 - Dissolved on 27 June 2023 
- IAN S DUNCAN LIMITEDActive - Proposal to Strike off- 03968653 - Incorporated on 10 April 2000 
- SANDISON CABS- SL004336 - Incorporated on 21 August 2001 
- MR PHILLIP DUNCAN LTDDisolved- 14841077 - Dissolved on 8 October 2024 
- IAN DUNCAN ARCHITECTS LTD.- SC249771 - Incorporated on 20 May 2003 
- IAN DUNCAN CONSULTING LTDActive - Proposal to Strike off- SC617489 - Incorporated on 8 January 2019 
- IAN DUNCAN DEVELOPMENTS LIMITED- SC228077 - Incorporated on 13 February 2002 
- MR DUNCAN MCRAE LIMITEDLiquidation- 07060379 - Incorporated on 29 October 2009 
- G SANDISON LTD- SC594671 - Incorporated on 18 April 2018 
- MR IAN HEALY LIMITEDDisolved- NI682989 - Dissolved on 21 November 2023 
- MR LAURENCE IAN HOWARD-CLARK LIMITED- 09316877 - Incorporated on 18 November 2014 
- SANDISONPAY LTD- 04745849 - Incorporated on 28 April 2003 
- SHAW SANDISON LTD.Disolved- SC371337 - Dissolved on 16 May 2023 
- SANDISON EASSON LIMITED- 06731820 - Incorporated on 23 October 2008 - Rex Buildings, Cheshire, Wilmslow, SK9 1HY 
- DUNCAN IAN PROJECT MANAGEMENT LIMITED- 10788013 - Incorporated on 24 May 2017 
- SANDISON LANG LTD- 08398054 - Incorporated on 11 February 2013 
- DUNCAN & DUNCAN- LP004860 - Incorporated on 16 May 1995 
- MR NICHOLAS IAN PURSEY LTDDisolved- 12206854 - Dissolved on 29 March 2022 
- MRS IAN CROSSMAN LIMITEDActive - Proposal to Strike off- 07769687 - Incorporated on 12 September 2011