- MARCUS WILLIS LTD- 14073507 - Incorporated on 27 April 2022 
- MARCUS BY SHIRT LTDActive - Proposal to Strike off- 14939459 - Incorporated on 15 June 2023 
- MARCUS & HOMIES LTDDisolved- 14401923 - Dissolved on 21 May 2024 
- MARCUS MORGAN LTDActive - Proposal to Strike off- 15577547 - Incorporated on 19 March 2024 
- THERM O RAD UK LIMITED- 09637084 - Incorporated on 12 June 2015 
- MARCOS CORRAZZIN 1381 LTDActive - Proposal to Strike off- 10056381 - Incorporated on 10 March 2016 
- MARCUS BOWING LTDActive - Proposal to Strike off- 08433433 - Incorporated on 7 March 2013 
- MARCUS HORNBY LTDActive - Proposal to Strike off- 09569837 - Incorporated on 30 April 2015 
- MARCUS J BARNES LTDActive - Proposal to Strike off- 10282309 - Incorporated on 16 July 2016 
- MARCUS YS LIMITED- 13856061 - Incorporated on 18 January 2022 
- MARCUS LYWOOD LTDDisolved- 13895040 - Dissolved on 18 October 2022 
- MARCUS LEAVER LTD- 15820297 - Incorporated on 4 July 2024 
- MR & MRS LARK LTDDissolved- 08146557 - Dissolved on 26 November 2019 
- HARRIS & HARRIS ASSOCIATES LIMITEDDisolved- 07499368 - Dissolved on 6 February 2024 
- HARRIS & HARRIS LONDON LIMITED- 09063948 - Incorporated on 30 May 2014 
- HARRIS & HARRIS PROPERTIES LIMITED- 11559186 - Incorporated on 7 September 2018 
- HARRIS & HARRIS (RETAIL) LIMITED- 03673355 - Incorporated on 24 November 1998 
- HARRIS & HARRIS CONSULTANCY LTD- 08165619 - Incorporated on 2 August 2012 
- HARRIS & HARRIS BOOKS LIMITED- 16245404 - Incorporated on 11 February 2025 
- HARRIS & HARRIS CONSULTING LIMITEDLiquidation- 08676311 - Incorporated on 4 September 2013