- MRT MARTINS LDA LIMITEDDissolved- 07629740 - Dissolved on 8 January 2013 
- MR DAVID JAMES MARTIN LTD- 16388942 - Incorporated on 15 April 2025 
- HEYMAN PRESTON LTD- 15915570 - Incorporated on 23 August 2024 
- HEYMAN CONSTRUCTION LIMITEDDisolved- 00452080 - Dissolved on 29 April 2025 
- HEYMAN COMPANY LIMITEDDisolved- 14734298 - Dissolved on 20 August 2024 
- HEYMAN INTERNATIONAL LTD.- 09876722 - Incorporated on 17 November 2015 
- HEYMAN CONSULTING LTD- 13884630 - Incorporated on 1 February 2022 
- HEYMAN ECO ENERGY LTDDisolved- 16115507 - Dissolved on 17 June 2025 
- J.H.MORGAN & HEYMANN LIMITEDLiquidation- 00582029 - Incorporated on 9 April 1957 
- HEYMANSVFX LIMITED- 11825924 - Incorporated on 13 February 2019 
- MARTIN GOODE MRICS LIMITEDActive - Proposal to Strike off- 07395477 - Incorporated on 4 October 2010 
- MARTINI MRT ENGINEERING LTD- 09452661 - Incorporated on 23 February 2015 
- IT-VENTURE CONSULTING LTDDisolved- 07519195 - Dissolved on 1 March 2024 
- JOHN HEYMANS & CO LIMITED- 04670478 - Incorporated on 19 February 2003 
- ERIC HEYMAN ILLUSTRATION LTD.- 05667173 - Incorporated on 5 January 2006 
- THE MR MARTIN CORPORATION LIMITEDActive - Proposal to Strike off- 09625052 - Incorporated on 5 June 2015 
- HEYMANS APARTMENTS LIMITED- 11527369 - Incorporated on 20 August 2018 
- HEYMAN WOODWORTH RECRUITMENT LIMITED- 04742896 - Incorporated on 24 April 2003 
- HEYMAN CONSULTING SERVICES LIMITED- 15763386 - Incorporated on 5 June 2024 
- HEYMANN BUILDERS LIMITED- 07233404 - Incorporated on 23 April 2010