- DUNCAN 444 LTDActive - Proposal to Strike off- 11698545 - Incorporated on 27 November 2018 
- DUNCAN 444 LTDActive - Proposal to Strike off- 09826488 - Incorporated on 15 October 2015 
- DUNCAN 524. LTDActive - Proposal to Strike off- 11060720 - Incorporated on 13 November 2017 
- A K DUNCAN LTDDissolved- 04439595 - Dissolved on 29 December 2009 
- E.J. DUNCAN LTD- 03221200 - Incorporated on 5 July 1996 
- A K DUNCAN (2008) LTD- 06659970 - Incorporated on 30 July 2008 
- DUNCAN 121 LTDDissolved- 06768273 - Dissolved on 20 July 2010 
- VELOCITY ELECTRICAL SURREY LTD- 13064923 - Incorporated on 6 December 2020 
- G S DUNCAN LTD.- SC253809 - Incorporated on 5 August 2003 
- P J DUNCAN LTDDissolved- 06332194 - Dissolved on 28 October 2014 
- G A DUNCAN LTD- SC558621 - Incorporated on 24 February 2017 
- R.J DUNCAN LTD- 11177731 - Incorporated on 30 January 2018 
- C&G DUNCAN LTD- 12970681 - Incorporated on 23 October 2020 
- T J DUNCAN LTD- 13181341 - Incorporated on 5 February 2021 
- A&P DUNCAN LTD- 14045090 - Incorporated on 13 April 2022 
- RALPH MEDIA GROUP LIMITEDActive - Proposal to Strike off- 11011448 - Incorporated on 13 October 2017 
- A & D DUNCAN LTDDisolved- 06238398 - Dissolved on 11 October 2022 
- DUNCAN M LTD- SC037178 - Incorporated on 18 January 1962 
- DUNCAN 1000 LTDActive - Proposal to Strike off- 08738680 - Incorporated on 18 October 2013 
- P & J DUNCAN LTDDissolved- 09292810 - Dissolved on 6 August 2019