- MARK SIMPSON LTDDisolved- 04748971 - Dissolved on 9 April 2024 
- DAVE SIMPSON LTD- 08613605 - Incorporated on 17 July 2013 
- PAUL SIMPSON LTD.Active - Proposal to Strike off- 09492026 - Incorporated on 16 March 2015 
- AMEE SIMPSON LTD- 09489955 - Incorporated on 13 March 2015 
- MIAH-SIMPSON LTDActive - Proposal to Strike off- 11126426 - Incorporated on 28 December 2017 
- FORT SIMPSON LTD- 12945823 - Incorporated on 13 October 2020 
- SIMPSONJAMES LTDDisolved- 14121374 - Dissolved on 24 October 2023 
- SIMPSON RAIL LTDActive - Proposal to Strike off- 06991860 - Incorporated on 17 August 2009 
- WARD SIMPSON LTD- 04435027 - Incorporated on 9 May 2002 
- SIMPSON RAIL LTDActive - Proposal to Strike off- 10141706 - Incorporated on 22 April 2016 
- GARY M SIMPSON LTD- SC520487 - Incorporated on 17 November 2015 
- MARC A SIMPSON LTDActive - Proposal to Strike off- SC550724 - Incorporated on 21 November 2016 
- MIKE SIMPSON LTD- 11806822 - Incorporated on 5 February 2019 
- JOHN T SIMPSON LTD- 11896704 - Incorporated on 21 March 2019 
- SIMPSON LETS LTDDisolved- 13656179 - Dissolved on 28 March 2023 
- MR3D LTDDissolved- 07916045 - Dissolved on 28 May 2013 
- MR H2O LTD- 08833148 - Incorporated on 6 January 2014 
- MR3D LTD- 09086767 - Incorporated on 16 June 2014 
- MRBD- 08542859 - Incorporated on 23 May 2013 
- MR13 LTD- 09350242 - Incorporated on 11 December 2014