- 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 
- NIGEL COYLE & CO LTD- 07431604 - Incorporated on 5 November 2010 
- NIGEL HODGES LTDDisolved- 07451075 - Dissolved on 14 June 2022 
- NIGEL MURRAY LLP- OC391294 - Incorporated on 18 February 2014 
- NIGEL SHAW ART LTD- 09072551 - Incorporated on 5 June 2014 
- NIGEL MURPHY LTDDissolved- 06502980 - Dissolved on 10 September 2013 
- NIGEL DUNLOP LTDDisolved- 11494051 - Dissolved on 26 September 2023 
- NIGEL SPENCE LTD- 12055147 - Incorporated on 17 June 2019 
- NIGEL'S BISTRO LTD- 15934863 - Incorporated on 4 September 2024 
- NIGEL OLIVER LTD- NI729525 - Incorporated on 19 May 2025 
- HARRIS & HARRIS CONSULTING LIMITEDLiquidation- 08676311 - Incorporated on 4 September 2013 
- HARRIS TWEED HARRIS LTDDisolved- SC666989 - Dissolved on 12 September 2023 
- NIGEL YAXLEY LTDDisolved- 05664934 - Dissolved on 5 July 2022 
- NIGEL LARKIN LTD- 12088651 - Incorporated on 6 July 2019 
- NIGEL WILKES LTD- 12213441 - Incorporated on 18 September 2019 
- NIGEL MOYLER LTD- 11848103 - Incorporated on 26 February 2019