- DONALD MARSHALL LTD- 08740538 - Incorporated on 21 October 2013 
- DONALD ROBERTS LTDActive - Proposal to Strike off- 08746982 - Incorporated on 24 October 2013 
- DONALD BRADSHAW LTDActive - Proposal to Strike off- 09307937 - Incorporated on 12 November 2014 
- DONALD STEPHENSON LIMITEDActive - Proposal to Strike off- 08782805 - Incorporated on 20 November 2013 
- DONALD THOMSON LIMITED- 08848611 - Incorporated on 16 January 2014 
- DONALD BRAMBLE LTDActive - Proposal to Strike off- 08936322 - Incorporated on 12 March 2014 
- DONALD PLANE LIMITEDActive - Proposal to Strike off- 11639257 - Incorporated on 24 October 2018 
- DONALD TECHNOLOGIES LTDActive - Proposal to Strike off- 11453538 - Incorporated on 9 July 2018 
- DONALD NORTON LIMITED- 12147785 - Incorporated on 9 August 2019 
- DONALD MATHIESON LIMITEDActive - Proposal to Strike off- SC515297 - Incorporated on 10 September 2015 
- DONALD SERVICES LIMITEDActive - Proposal to Strike off- 10469460 - Incorporated on 8 November 2016 
- DONALD MCDOUGALL & CO- SL000083 - Incorporated on 19 October 1982 
- DONALD ALEXANDER LTD- 12365423 - Incorporated on 16 December 2019 
- DONALD TRUM LIMITEDDisolved- 13707799 - Dissolved on 14 February 2023 
- DONALD CONSTRUCTION LTDDisolved- 13912210 - Dissolved on 23 May 2023 
- DONALD NORTON LTDActive - Proposal to Strike off- 14915817 - Incorporated on 5 June 2023 
- DONALD BUILDERS LTD- SC807794 - Incorporated on 22 April 2024 
- HARRIS & HARRIS ASSOCIATES LIMITEDDisolved- 07499368 - Dissolved on 6 February 2024 
- HARRIS & HARRIS LONDON LIMITED- 09063948 - Incorporated on 30 May 2014 
- HARRIS & HARRIS PROPERTIES LIMITED- 11559186 - Incorporated on 7 September 2018