| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADAMSON DEL 1 LIMITED | 04187357 | 27/03/2001 | Dissolved |
| Adamson 2005 Ltd | 01668348 | 22/05/1997 | Dissolved |
| Adamson 2005 Ltd | 01668348 | 22/05/1997 | Dissolved |
| Combined Power (Central) Ltd | 02592831 | 03/05/1997 | Dissolved |
| Combined Power (Central) Ltd | 02592831 | 03/05/1997 | Dissolved |
| Combined Power (North) Ltd | 02592846 | 03/05/1997 | Dissolved |
| Combined Power (North) Ltd | 02592846 | 03/05/1997 | Dissolved |
| ENER-G SUSTAINABLE TECHNOLOGIES LIMITED | 06786679 | 04/08/2009 | Dissolved |
| Intersceptre Ltd. | 04127456 | 19/12/2000 | Dissolved |
| Norgen (Belper) Ltd | 02994645 | 22/05/1997 | Dissolved |
| Norgen (Belper) Ltd | 02994645 | 22/05/1997 | Dissolved |
| Norgen (Ffestiniog) Ltd | 02900853 | 22/05/1997 | Dissolved |
| Norgen (Ffestiniog) Ltd | 02900853 | 22/05/1997 | Dissolved |
| Norgen Land Fill Gas Ltd | 02437203 | 22/05/1997 | Dissolved |
| Norgen Land Fill Gas Ltd | 02437203 | 22/05/1997 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 04821916 LIMITED | 04821916 | 02/04/2008 | 26/01/2012 | Insolvent |
| ABERTILLERY HOLDINGS LIMITED | 02050754 | 03/11/1992 | 05/01/1999 | Bronze |
| ADAMSON 2013 LIMITED | 05302754 | 21/12/2007 | 26/01/2012 | Dissolved |
| ADAMSON 2013 LIMITED | 05302754 | 21/12/2007 | 12/10/2011 | Dissolved |
| ADAMSON DEL 2 LIMITED | 02475151 | 03/05/1997 | 26/01/2012 | Dissolved |
| ADAMSON DEL 2 LIMITED | 02475151 | 03/05/1997 | 12/10/2011 | Dissolved |
| ADAMSON DEL 3 LIMITED | 02961734 | 22/05/1997 | 26/01/2012 | Dissolved |
| ADAMSON DEL 4 LIMITED | 05157967 | 02/10/2007 | 26/01/2012 | Not Trading |
| ADAMSON DEL 4 LIMITED | 05157967 | 02/10/2007 | 12/10/2011 | Not Trading |
| BIOGAS TECHNOLOGY (SAWTRY) LIMITED | 05146688 | 29/07/2004 | 18/12/2013 | One Red Flag |
| BIOGAS TECHNOLOGY LIMITED | 02323287 | 30/11/1991 | 22/10/1999 | Silver |
| BIOGAS TECHNOLOGY LIMITED | 02323287 | 30/11/1991 | 22/10/1999 | Silver |
| C & F MILLIER LIMITED | 00724656 | 03/11/1992 | 19/04/1994 | Amber |
| CENTRICA BUSINESS SOLUTIONS (GENERATION) LIMITED | 02592745 | 03/05/1997 | 26/01/2012 | Gold |
| CENTRICA BUSINESS SOLUTIONS UK LIMITED | 01874716 | 12/08/1997 | 26/01/2012 | Amber |
| CMR CONSULTANTS LIMITED | 03192206 | 02/10/2007 | 26/01/2012 | One Red Flag |
| CMR CONSULTANTS LIMITED | 03192206 | 02/10/2007 | 01/02/2010 | One Red Flag |
| ENER-G SERVICES CO LIMITED | 03664148 | 02/10/2007 | 26/01/2012 | Dissolved |
| ENER-G SERVICES CO LIMITED | 03664148 | 02/10/2007 | 12/10/2011 | Dissolved |
| ENER-G SUSTAINABLE TECHNOLOGIES LIMITED | 06786679 | 04/08/2009 | 26/01/2012 | Dissolved |
| ENER.G EFFICIENCY LIMITED | 02700990 | 01/04/2005 | 26/01/2012 | Dissolved |
| ENER.G EFFICIENCY LIMITED | 02700990 | 01/04/2005 | 01/02/2010 | Dissolved |
| ENERGOS LIMITED | 03109022 | 21/03/1996 | 26/01/2012 | Dissolved |
| ENERGOS LIMITED | 03109022 | 08/12/1995 | 16/01/2013 | Dissolved |
| ENERGY TEAM (MIDLANDS) LTD | 02913371 | 02/03/2006 | 26/01/2012 | One Red Flag |
| ENERGY TEAM (MIDLANDS) LTD | 02913371 | 02/03/2006 | 01/02/2010 | One Red Flag |
| ESSENTIAL CONTROL LIMITED | 03104919 | 31/01/2005 | 26/01/2012 | Amber |
| ESSENTIAL CONTROL LIMITED | 03104919 | 04/07/2007 | 01/02/2010 | Amber |
| FAMILY CENTRES LTD. | 03755596 | 21/04/1999 | 30/07/2014 | Dissolved |
| FISHPOND INVESTMENTS LIMITED | 02341019 | 03/11/1992 | 05/01/1999 | Dissolved |
| IRVINE ENERGY RECOVERY LIMITED | 06416410 | 09/11/2007 | 26/01/2012 | Dissolved |
| S I L International Ltd | 04431601 | 03/05/2002 | 30/05/2003 | Dissolved |
| SMARTKONTROLS LIMITED | 04107961 | 22/12/2000 | 23/05/2002 | Dissolved |
| SWITCH2 ENERGY LIMITED | 02409803 | 21/12/2007 | 26/01/2012 | Silver |
| SWITCH2 HOLDINGS LIMITED | 04990582 | 21/12/2007 | 26/01/2012 | Not Trading |
| SWITCH2 HOLDINGS LIMITED | 04990582 | 21/12/2007 | 12/10/2011 | Not Trading |
| THE COMPASS COFFEE HOUSE LTD | 06447455 | 07/12/2007 | 31/12/2007 | Dissolved |
| VIRIDIS ENERGY (NORGEN) LIMITED | 03059500 | 07/07/1995 | 06/04/2006 | Silver |
| VIRIDIS ENERGY (NORGEN) LIMITED | 03059500 | 24/02/1998 | 06/04/2006 | Silver |
| W. H. Millier Gear Specialists Ltd | 01147510 | 03/11/1992 | 05/01/1999 | Dissolved |
| WASTE GAS TECHNOLOGY (IOW) LIMITED | 05302756 | 21/12/2007 | 26/01/2012 | Dissolved |
| WASTE GAS TECHNOLOGY (IOW) LIMITED | 05302756 | 21/12/2007 | 12/10/2011 | Dissolved |
| WASTE GAS TECHNOLOGY UK LIMITED | 03051278 | 31/03/2004 | 26/01/2012 | Dissolved |
| YLEM ENERGY LIMITED | 02152229 | 22/05/1997 | 26/01/2012 | Silver |
| YLEM GROUP LIMITED | 03516925 | 20/02/1998 | 09/01/2018 | Gold |