| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Intergen (Uk) Extra Ltd | 03927860 | 05/05/2004 | Dissolved |
| Nec Holdings Ltd | 03866278 | 05/05/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CORYTON ENERGY COMPANY, LTD. | FC020597 | 24/01/2020 | 07/09/2023 | Silver |
| GREEN BESS DEVELOPMENT SERVICES (UK) LIMITED | 03547451 | 05/05/2004 | 01/12/2009 | Silver |
| INTERGEN (UK) LTD. | 03039100 | 22/01/2020 | 07/09/2023 | Gold |
| INTERGEN ENERGY TRADING AND SHIPPING LIMITED | 11842451 | 26/05/2022 | 07/09/2023 | Not Trading |
| INTERGEN ENTERPRISES (UK) LTD. | 03568678 | 05/05/2004 | 01/10/2015 | Not Trading |
| INTERGEN MANAGEMENT SERVICES (U.K.) LTD | 03547447 | 05/05/2004 | 01/10/2015 | Dissolved |
| INTERGEN OPERATING COMPANY (UK) LIMITED | 03197643 | 05/05/2004 | 01/10/2015 | Gold |
| ROCKSAVAGE POWER COMPANY, LTD. | FC018868 | 05/05/2004 | 01/10/2015 | Silver |
| SAVAGE LAND LIMITED | 03145444 | 05/05/2004 | 01/10/2015 | Not Trading |
| SPALDING ENERGY COMPANY, LTD. | FC019668 | 05/05/2004 | 01/10/2015 | Silver |
| SPALDING ENERGY EXPANSION LIMITED | 06790895 | 22/01/2020 | 07/09/2023 | Bronze |