- MR SEAN WILLIAMS LTDDisolved- 13943677 - Dissolved on 1 August 2023 
- MR SEAN WILLIAMS LTDDisolved- 15175917 - Dissolved on 4 March 2025 
- DAVID WILLIAMS LIMITEDActive - Proposal to Strike off- 08699825 - Incorporated on 20 September 2013 
- MR THOMAS DAVID LTDDisolved- 15351641 - Dissolved on 3 June 2025 
- DAVID WILLIAMS TM LTDDisolved- 12746911 - Dissolved on 21 December 2021 
- MR WILLIAMS MEDIA LTDActive - Proposal to Strike off- 10594215 - Incorporated on 1 February 2017 
- ALP SHACK LTD- 01473837 - Incorporated on 18 January 1980 
- DAVID WILLIAMS LAW LTD- 08331198 - Incorporated on 14 December 2012 
- SURREY ACCOUNTS LIMITED- 07400148 - Incorporated on 7 October 2010 
- MRT WILLIAMS LIMITEDActive - Proposal to Strike off- 10154180 - Incorporated on 28 April 2016 
- PAUL DAVID WILLIAMS LTD- 15656359 - Incorporated on 17 April 2024 
- MR DAVID SHAW LIMITEDDissolved- 06674205 - Dissolved on 23 March 2010 
- SES (SCOTLAND) LTDActive - Proposal to Strike off- SC597643 - Incorporated on 18 May 2018 
- WILLIAMS ASSOCIATES (MR) LIMITED- 10507919 - Incorporated on 2 December 2016 
- DAVID @ TEES MRI LIMITEDActive - Proposal to Strike off- 09392679 - Incorporated on 16 January 2015 
- DAVID WILLIAMS I F A LIMITED- 04638076 - Incorporated on 15 January 2003 
- VALIDATION CONSULTANTS LTDActive - Proposal to Strike off- 11885843 - Incorporated on 15 March 2019 
- DAVID T WILLIAMS LIMITED- 06450283 - Incorporated on 11 December 2007 
- DAVID W. WILLIAMS LIMITED- 00629628 - Incorporated on 4 June 1959 
- DAVID J.G. WILLIAMS LIMITEDDisolved- 10292114 - Dissolved on 7 June 2022