- DAVID SIMONS SERVICES LTDDisolved- 12163987 - Dissolved on 5 October 2021 
- SIMON DAVID BATHROOMS LIMITED- 11751149 - Incorporated on 4 January 2019 
- DAVID SIMON (NEWSUB1) LIMITED- 13367424 - Incorporated on 29 April 2021 - 5 Jardine House, Harrovian Business Village, Bessborough Road, Harrow, HA1 3EX 
- DAVID SIMON (HOLDCOB) LIMITED- 13362059 - Incorporated on 27 April 2021 - 5 Jardine House, Harrovian Business Village, Bessborough Road, Harrow, HA1 3EX 
- DAVID SIMON (NEWHOLDCO) LIMITEDLiquidation- 13360917 - Incorporated on 27 April 2021 - 5 Jardine House, Harrovian Business Village, Bessborough Road, Harrow, HA1 3EX 
- DAVID SIMON TRADING LIMITED- 12749146 - Incorporated on 16 July 2020 
- DAVID SIMON MARKS LIMITEDActive - Proposal to Strike off- 04987648 - Incorporated on 8 December 2003 
- DAVID SIMON ASSOCIATES LIMITED- 06070652 - Incorporated on 26 January 2007 
- SIMON DAVID WILLIAMS LIMITED- 05873663 - Incorporated on 12 July 2006 
- DAVID SIMON PROPERTIES LTDDisolved- 13902024 - Dissolved on 16 July 2024 - 5 Jardine House, Harrovian Business Village, Bessborough Road, Harrow, HA1 3EX 
- DAVID @ TEES MRI LIMITEDActive - Proposal to Strike off- 09392679 - Incorporated on 16 January 2015 
- DAVID SIMONS CREATIVE LTD- 12864580 - Incorporated on 8 September 2020 
- SIMONA DAVID CATERING LTDDisolved- 13716062 - Dissolved on 25 April 2023 
- DR DAVID M JONES MRCVS LTD- 15107831 - Incorporated on 31 August 2023 
- MR DAVID MOORE LIMITEDDissolved- 07205744 - Dissolved on 4 December 2012 
- HOLLIER CONTRACTS LIMITEDDissolved- 05022316 - Dissolved on 8 March 2011 
- HOLLIER CONSULTANCY LTDDisolved- 14813597 - Dissolved on 23 July 2024 
- HOLLIER INVESTMENTS LIMITED- 03728100 - Incorporated on 8 March 1999 
- HOLLIER BROADCAST LIMITED- 07717707 - Incorporated on 26 July 2011 
- SIMON DAVID EDWARD LUCAS LTD- 14013555 - Incorporated on 30 March 2022