- SHANE DUNCAN LTDDisolved- 14056815 - Dissolved on 26 September 2023 
- DUNCAN JAMES LTD- 15389542 - Incorporated on 5 January 2024 
- DUNCAN SHEDS LTD- NI727411 - Incorporated on 13 March 2025 
- MR AND MRS P HANLON GROUP LIMITED- 10092065 - Incorporated on 31 March 2016 
- MR F G, MRS N K AND MR A J GAMMON LIMITED- 08665204 - Incorporated on 27 August 2013 
- LINDA DUNCAN LTD- SC395623 - Incorporated on 16 March 2011 
- R D DUNCAN LIMITED- SC417023 - Incorporated on 14 February 2012 
- DUNCAN PRATT P0610 LTD- 04845855 - Incorporated on 25 July 2003 
- DUNCAN DAYEK LTD- 08914788 - Incorporated on 27 February 2014 
- C & L DUNCAN LIMITED- SC481931 - Incorporated on 10 July 2014 
- DUNCAN BRACK LTD- 08482659 - Incorporated on 10 April 2013 
- MOSHE DUNCAN LTDDisolved- 10883987 - Dissolved on 5 October 2021 
- H DUNCAN LIMITEDActive - Proposal to Strike off- 10989361 - Incorporated on 29 September 2017 
- LEIGH DUNCAN LLP- OC403471 - Incorporated on 16 December 2015 
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- DUNCAN ELLIS LTDActive - Proposal to Strike off- 13757969 - Incorporated on 22 November 2021 
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- DUNCANCLEANING LTDDisolved- 15116526 - Dissolved on 11 February 2025 
- KATHY DUNCAN LTD- 12991671 - Incorporated on 2 November 2020