| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHARLES CAPITAL LTD | 12364279 | 16/12/2019 | Bronze |
| CHARLES VENTURES LTD | 12367881 | 17/12/2019 | Bronze |
| CORY TOPCO LIMITED | 11385842 | 01/01/2021 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BASILDON POWER LIMITED | 09144975 | 23/07/2014 | 01/12/2017 | One Red Flag |
| CITIGEN (LONDON) LIMITED | 02427823 | 07/04/2003 | 31/03/2004 | Bronze |
| DIAMOND POWER GENERATION LIMITED | 04000114 | 28/02/2003 | 31/03/2004 | Dissolved |
| ERGON POWER LIMITED | 03548347 | 28/02/2003 | 31/03/2004 | Dissolved |
| FIELD GERRARDS CROSS LTD | 09718112 | 05/08/2015 | 19/04/2019 | One Red Flag |
| ITCHEN POWER LIMITED | 09146100 | 24/07/2014 | 01/12/2017 | One Red Flag |
| OCEAN POWER TECHNOLOGIES LIMITED | 05225532 | 27/09/2004 | 15/01/2010 | One Red Flag |
| PEAK GEN HOLDINGS LIMITED | 08179597 | 14/09/2012 | 19/04/2019 | Not Trading |
| PEAK GEN POWER 10 LIMITED | 09144106 | 23/07/2014 | 16/04/2019 | Not Trading |
| PEAK GEN POWER 12 LIMITED | 09144365 | 23/07/2014 | 16/04/2019 | Not Trading |
| PEAK GEN POWER 13 LIMITED | 09144209 | 23/07/2014 | 16/04/2019 | Silver |
| PEAK GEN POWER 14 LIMITED | 09145062 | 24/07/2014 | 16/04/2019 | Bronze |
| PEAK GEN POWER 17 LIMITED | 09145136 | 24/07/2014 | 16/04/2019 | Not Trading |
| PEAK GEN POWER 18 LIMITED | 09145186 | 24/07/2014 | 16/04/2019 | Silver |
| PEAK GEN POWER 19 LIMITED | 09145990 | 24/07/2014 | 16/04/2019 | Dissolved |
| PEAK GEN POWER 2 LIMITED | 08179576 | 14/09/2012 | 01/04/2019 | Amber |
| PEAK GEN POWER 20 LIMITED | 09146042 | 24/07/2014 | 16/04/2019 | Dissolved |
| PEAK GEN POWER 21 LIMITED | 09145955 | 24/07/2014 | 16/04/2019 | Not Trading |
| PEAK GEN POWER 23 LIMITED | 09146738 | 24/07/2014 | 16/04/2019 | Dissolved |
| PEAK GEN POWER 24 LIMITED | 09148247 | 25/07/2014 | 19/04/2019 | Not Trading |
| PEAK GEN POWER 25 LIMITED | 09718110 | 05/08/2015 | 19/04/2019 | Not Trading |
| PEAK GEN POWER 26 LIMITED | 09718111 | 05/08/2015 | 19/04/2019 | Not Trading |
| PEAK GEN POWER 28 LIMITED | 09718104 | 05/08/2015 | 19/04/2019 | Dissolved |
| PEAK GEN POWER 29 LIMITED | 09718128 | 05/08/2015 | 19/04/2019 | Dissolved |
| PEAK GEN POWER 3 LIMITED | 08527073 | 13/05/2013 | 01/04/2019 | Not Trading |
| PEAK GEN POWER 30 LIMITED | 09718163 | 05/08/2015 | 19/04/2019 | Dissolved |
| PEAK GEN POWER 4 LIMITED | 08527210 | 13/05/2013 | 01/04/2019 | Not Trading |
| PEAK GEN POWER 5 LIMITED | 08527380 | 13/05/2013 | 01/04/2019 | Silver |
| PEAK GEN POWER 6 LIMITED | 08527433 | 13/05/2013 | 01/04/2019 | Silver |
| PEAK GEN POWER 7 LIMITED | 08527468 | 13/05/2013 | 01/04/2019 | Bronze |
| PEAK GEN POWER 8 LIMITED | 09143483 | 23/07/2014 | 01/04/2019 | Not Trading |
| PEAK GEN POWER 9 LIMITED | 09144145 | 23/07/2014 | 16/04/2019 | Not Trading |
| PEAK GEN POWER LIMITED | 07344467 | 23/11/2010 | 01/04/2019 | Gold |
| PEAK GEN POWER SYSTEMS LIMITED | 07706943 | 15/07/2011 | 19/04/2019 | Not Trading |
| PEAK POWER ASSOCIATES LIMITED | 07132401 | 28/07/2011 | 19/04/2019 | Not Trading |
| PGP SYSTEMS LIMITED | 07773382 | 14/09/2011 | 19/04/2019 | Not Trading |
| POWERGEN IRELAND LIMITED | 04721782 | 04/04/2003 | 31/03/2004 | Dissolved |
| RENEWABLE POWER & LIGHT LIMITED | 05817450 | 07/11/2006 | 24/09/2009 | Dissolved |
| SLOUGH HEAT & POWER LIMITED | 00174142 | 01/01/2005 | 31/12/2007 | Bronze |
| SMETHWICK POWER LIMITED | 09145011 | 23/07/2014 | 01/12/2017 | One Red Flag |
| W4B RENEWABLE ENERGY LIMITED | 06479668 | 30/09/2011 | 01/04/2019 | Gold |
| WINDY HILLS LIMITED | NI027739 | 15/10/2001 | 31/03/2004 | Dissolved |