- MR DUNCAN ROY LTDDisolved- 13244435 - Dissolved on 27 June 2023 
- JOHN DUNCAN LTDActive - Proposal to Strike off- SC590704 - Incorporated on 7 March 2018 
- JOHN DUNCAN NE LTD- 07867049 - Incorporated on 1 December 2011 
- MR. JOHN NEEDisolved- NI610586 - Dissolved on 18 June 2024 
- JOHN DUNCAN LIMITEDLiquidation- 04639727 - Incorporated on 17 January 2003 
- JOHN HARLEY LIMITED- 00378919 - Incorporated on 18 February 1943 
- MR PHILLIP DUNCAN LTDDisolved- 14841077 - Dissolved on 8 October 2024 
- JOHN S.DUNCAN LIMITED- SC035444 - Incorporated on 30 June 1960 
- TLCJ MR N A JOHNSON LIMITEDDisolved- 12680774 - Dissolved on 30 January 2024 
- MR AND MRS JOHNCOCK LTDDissolved- 09566798 - Dissolved on 8 May 2018 
- MR DUNCAN MCRAE LIMITEDLiquidation- 07060379 - Incorporated on 29 October 2009 
- DUNCAN JOHN FISHER LTDDissolved- 10600961 - Dissolved on 10 September 2019 
- MR JOHN'S LIMITEDActive - Proposal to Strike off- 04692323 - Incorporated on 10 March 2003 
- MR NIGEL JOHN LTDActive - Proposal to Strike off- 15513862 - Incorporated on 22 February 2024 
- MR JOHN BROWN LTDDissolved- SC645267 - Dissolved on 22 June 2021 
- DUNCAN JOHNSON LIMITEDDisolved- 09705897 - Dissolved on 13 September 2022 
- MR NEVILLE JOHNSON NBA AND MRS HELEN JOHNSON NBA (COA RCOJ) (VAUXHALL) UK LIMITEDActive - Proposal to Strike off- 12089736 - Incorporated on 6 July 2019 
- JOHN DUNCAN ROOFING LIMITEDLiquidation- SC309634 - Incorporated on 4 October 2006 
- JOHN DUNCAN BUILDERS LTD- SC669234 - Incorporated on 29 July 2020 
- MR JOHNNY CARS LTDDisolved- 12592215 - Dissolved on 12 October 2021