| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BIOGAS TECHNOLOGY LIMITED | 02323287 | 27/11/2018 | Silver |
| BLAGUEGATE POWER LIMITED | 14686583 | 24/02/2023 | Bronze |
| CORRINGHAM POWER LIMITED | 14686701 | 24/02/2023 | Bronze |
| ESSENTIAL CONTROL LIMITED | 03104919 | 14/05/2018 | Amber |
| GREAT DUNMOW POWER LIMITED | 14686673 | 24/02/2023 | Bronze |
| HEWDEN PROPERTIES LIMITED | SC043085 | 11/05/2015 | Dissolved |
| HS REALISATIONS LIMITED | SC045681 | 11/05/2015 | Dissolved |
| KNOWSLEY ENERGY RECOVERY LIMITED | 07058988 | 11/03/2022 | Not Trading |
| LLAY POWER LIMITED | 14686634 | 24/02/2023 | Bronze |
| MAJOR OAK INVESTMENTS LIMITED | 14455918 | 01/11/2022 | Gold |
| POWERZERO ENERGY LIMITED | 15037832 | 31/07/2023 | Bronze |
| ROOT-POWER (NORTH) LIMITED | 15286460 | 15/11/2023 | Bronze |
| ROOT-POWER (SOUTH) LIMITED | 15287001 | 15/11/2023 | Bronze |
| ROOT-POWER LIMITED | 15499441 | 18/02/2024 | Amber |
| SUTTON POWER LIMITED | 14686578 | 24/02/2023 | Bronze |
| SWITCH2 ENERGY LIMITED | 02409803 | 14/05/2018 | Silver |
| THE RIGGING HOUSE LTD | 07786032 | 12/01/2016 | Dissolved |
| WHARFSIDE POWER LIMITED | 14686535 | 24/02/2023 | Bronze |
| WOODSTER REALISATIONS LIMITED | 05724045 | 12/01/2016 | Dissolved |
| XANGEO LIMITED | 07870009 | 05/12/2011 | Dissolved |
| YLEM ENERGY LIMITED | 02152229 | 14/05/2018 | Silver |
| YLEM FLEXIBLE POWER LIMITED | 15503405 | 19/02/2024 | Amber |
| YLEM GROUP LIMITED | 03516925 | 14/05/2018 | Gold |
| YLEM POWER LIMITED | 11934674 | 09/04/2019 | One Red Flag |
| YLEM RENEWABLES LIMITED | 10940218 | 14/05/2018 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ATG ACCESS (HOLDINGS) LIMITED | 03864111 | 30/11/2017 | 09/04/2018 | Dissolved |
| BYPRODUCT RECOVERY LIMITED | 06257744 | 24/05/2007 | 23/12/2010 | Silver |
| COBACO BARRIER COMPANY LIMITED | 03911862 | 30/11/2017 | 09/04/2018 | Dissolved |
| COBACO LIMITED | 05619753 | 30/11/2017 | 09/04/2018 | Not Trading |
| CUSHON GROUP LIMITED | 10967805 | 04/04/2020 | 01/06/2023 | Amber |
| CUSHON HOLDINGS LIMITED | 14213564 | 16/11/2022 | 01/06/2023 | Gold |
| GRANGE GREEN (MANAGEMENT) LIMITED | 03453210 | 30/11/2001 | 28/01/2004 | Silver |
| GRANGE GREEN (MANAGEMENT) LIMITED | 03453210 | 30/11/2001 | 28/01/2004 | Silver |
| MWH FARRER LIMITED | 05728436 | 02/03/2006 | 23/12/2010 | Amber |
| MWH TREATMENT LIMITED | 01535477 | 01/02/2004 | 23/12/2010 | Silver |
| STANTEC TREATMENT HOLDING LIMITED | 05728439 | 02/03/2006 | 23/12/2010 | Dissolved |
| VEHICLE PROTECTION SECURITY POSTS LIMITED | 04857158 | 30/11/2017 | 09/04/2018 | Dissolved |