- STEPHANIE WAUGH TEACHING LIMITEDActive - Proposal to Strike off- 10213162 - Incorporated on 3 June 2016 
- JAMIE WAUGH ASSOCIATES LIMITEDDisolved- 13463040 - Dissolved on 21 November 2023 
- WILLIAM DUNCAN (UK) LIMITED- SC475044 - Incorporated on 11 April 2014 
- DUNCAN 3333 LIMITEDActive - Proposal to Strike off- 10648593 - Incorporated on 2 March 2017 
- TOM AND DUNCAN LTD- 14210391 - Incorporated on 2 July 2022 
- DUNCAN R BLACK LTD- 15647988 - Incorporated on 15 April 2024 
- J & L DUNCAN LIMITEDLiquidation- 02824291 - Incorporated on 4 June 1993 
- A DUNCAN LIMITED- 04455030 - Incorporated on 6 June 2002 
- BRIAN DUNCAN (19836) LTD- 09556757 - Incorporated on 23 April 2015 
- G A DUNCAN LIMITEDDissolved- SC296117 - Dissolved on 17 May 2013 
- DUNCANATHERTON LTD- 08391684 - Incorporated on 6 February 2013 
- J.G.S. & D DUNCAN LIMITED- SC378150 - Incorporated on 7 May 2010 
- C DUNCAN LIMITED- 10011526 - Incorporated on 18 February 2016 
- DUNCAN 95 LIMITEDActive - Proposal to Strike off- 10061350 - Incorporated on 14 March 2016 
- DUNCAN VALLE LTDDissolved- 09797777 - Dissolved on 7 March 2017 
- N S DUNCAN LIMITED- 11092178 - Incorporated on 1 December 2017 
- DUNCAN KELLY LTD- SC589219 - Incorporated on 19 February 2018 
- DUNCAN 56 LIMITEDDisolved- 13506643 - Dissolved on 30 January 2024 
- DUNCANROBINSON LTDDisolved- 13598410 - Dissolved on 16 May 2023 
- DUNCAN GROUP LTD- 15952833 - Incorporated on 12 September 2024