| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADAMSON DEL 3 LIMITED | 02961734 | 29/07/2013 | Dissolved |
| ADAMSON DEL 4 LIMITED | 05157967 | 26/09/2017 | Not Trading |
| BALANCE POWER TWO LTD | 12370459 | 27/12/2019 | Dissolved |
| BIOGAS TECHNOLOGY (SAWTRY) LIMITED | 05146688 | 04/01/2022 | One Red Flag |
| BIOGAS TECHNOLOGY CARBON LIMITED | 06798648 | 22/01/2009 | Dissolved |
| BIOGAS TECHNOLOGY LIMITED | 02323287 | 09/08/1999 | Silver |
| BLAGUEGATE POWER LIMITED | 14686583 | 24/02/2023 | Bronze |
| CHECKERS ENERGY LIMITED | SC698178 | 10/11/2023 | One Red Flag |
| CORPOWER LIMITED | 10171623 | 07/09/2021 | Amber |
| CORRINGHAM POWER LIMITED | 14686701 | 24/02/2023 | Bronze |
| GORING POWER LTD | 13003823 | 10/02/2023 | Bronze |
| GREAT DUNMOW POWER LIMITED | 14686673 | 24/02/2023 | Bronze |
| HEYWOOD POWER LIMITED | 12542296 | 07/08/2023 | Not Trading |
| LLAY POWER LIMITED | 14686634 | 24/02/2023 | Bronze |
| POWERZERO ENERGY LIMITED | 15037832 | 31/07/2023 | Bronze |
| REAY POWER LIMITED | 14260512 | 10/05/2023 | Not Trading |
| ROOT-POWER (NORTH) LIMITED | 15286460 | 15/11/2023 | Amber |
| ROOT-POWER (SOUTH) LIMITED | 15287001 | 15/11/2023 | Amber |
| ROOT-POWER LIMITED | 15499441 | 18/02/2024 | Amber |
| SUTTON POWER LIMITED | 14686578 | 24/02/2023 | Bronze |
| WHARFSIDE POWER LIMITED | 14686535 | 24/02/2023 | Bronze |
| WHEATLEY POWER LTD | 12508378 | 06/12/2021 | Dissolved |
| YLEM ENERGY LIMITED | 02152229 | 29/07/2013 | Silver |
| YLEM FLEXIBLE POWER LIMITED | 15503405 | 19/02/2024 | Amber |
| YLEM GROUP LIMITED | 03516925 | 10/09/2020 | Gold |
| YLEM POWER LIMITED | 11934674 | 09/04/2019 | One Red Flag |
| YLEM RENEWABLES LIMITED | 10940218 | 11/02/2022 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIOGAS TECHNOLOGY (SAWTRY) LIMITED | 05146688 | 29/07/2004 | 18/12/2013 | One Red Flag |
| NATURAL POWER INTERNATIONAL LIMITED | 09418242 | 03/02/2015 | 14/06/2017 | Dissolved |