| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| HIGHLAND COMPONENTS LIMITED | SC077468 | 20/01/2005 | Dissolved |
| HYDRASUN (CASPIAN SEA) LIMITED | SC276919 | 26/08/2005 | Dissolved |
| LEDGE 826 LIMITED | SC274011 | 01/09/2006 | Dissolved |
| NEVISMOUNT LIMITED | SC231079 | 20/01/2005 | Dissolved |
| SPRINGBOARD UK BIDCO LIMITED | 08369256 | 22/03/2013 | Dissolved |
| SPRINGBOARD UK MIDCO 1 LTD | 08369158 | 22/03/2013 | Dissolved |
| SPRINGBOARD UK MIDCO 2 LTD | 08369193 | 22/03/2013 | Dissolved |
| SPRINGBOARD UK TOPCO LTD | 08368958 | 22/03/2013 | Dissolved |
| VALVES & CONTROLS SCOTLAND LIMITED | SC086641 | 20/01/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DRUMDEAL LIMITED | SC282770 | 19/01/2010 | 01/09/2020 | Dissolved |
| FUEL CELL SYSTEMS LTD | 07411241 | 26/09/2022 | 15/11/2024 | Gold |
| HGEN2 ENERGY VENTURES LIMITED | SC700934 | 09/07/2021 | 15/11/2024 | Silver |
| HGEN2 LIMITED | SC701049 | 02/09/2021 | 15/11/2024 | Silver |
| HYDRASUN ACQUISITIONS LIMITED | 06338822 | 12/10/2007 | 21/12/2017 | Dissolved |
| HYDRASUN FINANCE LIMITED | 06346770 | 12/10/2007 | 21/12/2017 | Dissolved |
| HYDRASUN HOLDINGS LIMITED | 06346769 | 12/10/2007 | 21/12/2017 | Dissolved |
| HYDRASUN IFP LIMITED | SC343104 | 17/07/2008 | 21/12/2017 | Dissolved |
| HYDRASUN LIMITED | SC059688 | 20/01/2005 | 15/11/2024 | Gold |