- CERIUM SOLUTIONS LTDActive - Proposal to Strike off- 08925235 - Incorporated on 6 March 2014 
- CERIUM SOLUTIONS LTDActive - Proposal to Strike off- 11026723 - Incorporated on 23 October 2017 
- CERISE BURLESQUE LTDActive - Proposal to Strike off- 10195507 - Incorporated on 24 May 2016 
- AU TEMPS DES CERISES LTDDisolved- 13996968 - Dissolved on 29 August 2023 
- CERITH GRIFFITHS CYF.- 16464253 - Incorporated on 21 May 2025 
- CERIN&ODI TRANSPORT LTDDisolved- 12871836 - Dissolved on 21 December 2021 
- CERISE HEALTHCARE LTD- 10302140 - Incorporated on 29 July 2016 
- CERISE PROPERTIES LTD- 15606006 - Incorporated on 30 March 2024 
- CERISE EVENTS LIMITED- 07540674 - Incorporated on 23 February 2011 
- CERION EUROPE LIMITEDActive - Proposal to Strike off- 09224548 - Incorporated on 18 September 2014 
- CERIS WYN JAMES LIMITEDDisolved- 13822055 - Dissolved on 11 June 2024 
- CERISE HEALTH LIMITED- 09721985 - Incorporated on 7 August 2015 
- CERIECO UK CORP LIMITEDDisolved- 13072901 - Dissolved on 17 May 2022 
- 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 
- TJ&MS- 12924181 - Incorporated on 2 October 2020