- RICHARD DAVID WILLIAMS LTDActive - Proposal to Strike off- 08971313 - Incorporated on 1 April 2014 
- DAVID WILLIAMS TRAINING LIMITEDDissolved- 04280810 - Dissolved on 17 August 2010 
- MR DAVID JOHN CLAPHAM LTD- 11962964 - Incorporated on 25 April 2019 
- MR WILLIAMS RAIL CO LIMITEDDisolved- 12268602 - Dissolved on 11 April 2023 
- MR DAVID ENTERPRISES LIMITEDDissolved- 05897067 - Dissolved on 9 August 2011 
- MARTYN O LTD- 09999661 - Incorporated on 11 February 2016 
- MR DAVID GEORGE BARNEY LTDDisolved- 13206712 - Dissolved on 26 July 2022 
- DAVID WILLIAMSON LIMITED- 04504467 - Incorporated on 6 August 2002 
- MR DAVID ROBERT WEAVER LTD.Active - Proposal to Strike off- 15543865 - Incorporated on 6 March 2024 
- MR DAVID JAMES RUSHTON LTDDisolved- 15424554 - Dissolved on 17 September 2024 
- WILLIAMSON MR PETER DEAN LTDDisolved- 15374656 - Dissolved on 3 June 2025 
- H MARTYN LTDDisolved- 13141701 - Dissolved on 26 April 2022 
- MARTYN LTD.- 09456313 - Incorporated on 24 February 2015 
- DAVID G WILLIAMS CREATIVE LTDDisolved- 11076010 - Dissolved on 19 December 2023 
- DR MATTHEW WILLIAMS MRCVS LTD- 11706517 - Incorporated on 30 November 2018 
- PARAMI LIVING LTD.- 10167658 - Incorporated on 6 May 2016 
- RYAN JOSHUA DAVID WILLIAMS LTD- 15406420 - Incorporated on 11 January 2024 
- MARTYNA LTDActive - Proposal to Strike off- 06836892 - Incorporated on 4 March 2009 
- MARTYN PM LTDActive - Proposal to Strike off- 07662249 - Incorporated on 8 June 2011 
- MR DAVID MICHAEL HAMMITT LTDDisolved- 13881191 - Dissolved on 9 July 2024