- ALLAN & DAVIDSON LIMITEDDisolved- SC676305 - Dissolved on 24 May 2022 
- DOIG & SMITH SURVEYORS LLPDissolved- SO300563 - Dissolved on 26 April 2013 
- R DOIG LIMITED- SC165042 - Incorporated on 19 April 1996 
- DAVID ALLAN HEALTHCARE LTD.Disolved- SC247120 - Dissolved on 24 April 2023 
- DAVID ALLAN SMITH LIMITEDDissolved- 06350950 - Dissolved on 11 January 2011 
- DAVID ALLAN CONSULTING LTD- 15080895 - Incorporated on 18 August 2023 
- K DOIG LIMITED- 07278161 - Incorporated on 9 June 2010 
- DAVID ALLAN COMPUTING LIMITED- 05215498 - Incorporated on 26 August 2004 
- DAVID ALLAN CONSULTING LIMITEDActive - Proposal to Strike off- 06542298 - Incorporated on 25 March 2008 
- DAVID ALLAN SECURITY LIMITEDActive - Proposal to Strike off- 10532247 - Incorporated on 19 December 2016 
- DAVID ALLAN CONSULTANCY LTD- 11956914 - Incorporated on 23 April 2019 
- DAVID ALLAN LITTLEJOHN LIMITEDActive - Proposal to Strike off- 08063264 - Incorporated on 10 May 2012 
- MR THOMAS DAVID LTDDisolved- 15351641 - Dissolved on 3 June 2025 
- DAVID ALLAN CONSTRUCTION LIMITEDDisolved- 09790032 - Dissolved on 13 September 2022 
- VARTY ALLAN DAVID 80168 LIMITEDActive - Proposal to Strike off- 08984355 - Incorporated on 8 April 2014 
- DAVID H ALLAN GROUP LIMITED- SC084532 - Incorporated on 8 September 1983 
- MCKENZIE BERWIN UK LIMITEDLiquidation- 07817907 - Incorporated on 20 October 2011 
- DOIG SPOT LTD- SC793273 - Incorporated on 22 December 2023 
- DL DOIG LIMITEDDissolved- 08851683 - Dissolved on 30 July 2019 
- A DOIG LIMITEDDissolved- SC540218 - Dissolved on 18 December 2018