| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BLUESTONE ENERGY LTD | 11673645 | 15/10/2019 | Bronze |
| BLUESTONE LLWYN-ONN 1 LTD | 13073295 | 09/12/2020 | Not Trading |
| BLUESTONE PONTHIR 1 LTD | 13073423 | 09/12/2020 | Not Trading |
| BLUESTONE QPE 1 LIMITED | 13130329 | 13/01/2021 | Not Trading |
| BLUESTONE RETTENDON 1 LTD | 12720126 | 05/07/2020 | Silver |
| BLUESTONE RHADYR 1 LTD | 13073392 | 09/12/2020 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BLUESTONE ENERGY LTD | 11673645 | 01/06/2019 | 15/08/2019 | Bronze |
| CLEARTEQ ENERGY LIMITED | 09692367 | 17/07/2015 | 28/11/2017 | One Red Flag |
| GRIDLOCK UK LTD | 12234180 | 30/09/2019 | 30/06/2022 | Silver |