- 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 
- HARRIS TWEED HARRIS LTDDisolved- SC666989 - Dissolved on 12 September 2023 
- FORTAS HOMES LTDActive - Proposal to Strike off- 06395248 - Incorporated on 10 October 2007 
- HARRIS & HARRISON LTD- 11623254 - Incorporated on 15 October 2018 
- NATHAN WATERS LTD- 07354204 - Incorporated on 24 August 2010 
- NATHAN MUIR INT LTD- 07489999 - Incorporated on 12 January 2011 
- LISTON NATHAN LTDActive - Proposal to Strike off- 06333802 - Incorporated on 6 August 2007 
- NATHAN PARKER LTD- 09044695 - Incorporated on 16 May 2014 
- NATHAN ERVIN & CO. LTD.Dissolved- 08279765 - Dissolved on 2 December 2014 
- NATHAN WALTON LTD- 10706422 - Incorporated on 4 April 2017 
- NATHAN CULLEN LTDDisolved- 12647000 - Dissolved on 9 November 2021 
- SURESH NATHAN LTDDisolved- 13273565 - Dissolved on 23 August 2022 
- HARRIS & HARRIS CONSTRUCTION LIMITED- 02591706 - Incorporated on 14 March 1991 
- NATHAN'SHOUSE LTDActive - Proposal to Strike off- 09648331 - Incorporated on 19 June 2015 
- S J NATHANS LIMITED- 08426377 - Incorporated on 1 March 2013