| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALMONDBANK POWER LIMITED | 08067209 | 11/12/2012 | Dissolved |
| Biochar Ltd | 05710457 | 15/02/2006 | Dissolved |
| CARBONARIUS3 LIMITED | 08782783 | 20/11/2013 | Dissolved |
| EPIK PROJECTS LIMITED | 08305820 | 23/11/2012 | Bronze |
| HEADS OF THE VALLEYS BIO POWER LIMITED | 08145425 | 11/12/2012 | Dissolved |
| O-GEN BCTREK LIMITED | 06553924 | 03/04/2008 | Dissolved |
| O-GEN DEVTREK LIMITED | 06620566 | 16/06/2008 | Dissolved |
| O-GEN ENERGY LIMITED | 06487643 | 29/01/2008 | Dissolved |
| O-GEN EXTREK LIMITED | 06620336 | 16/06/2008 | Dissolved |
| O-GEN LETREK LTD | 06479395 | 22/01/2008 | Dissolved |
| O-GEN UNA GROUP LIMITED | 06604837 | 28/05/2008 | Dissolved |
| O-GEN VITREK LIMITED | 06487585 | 29/01/2008 | Dissolved |
| OGEN LIMITED | 05883843 | 21/07/2006 | Dissolved |
| U.K. Energy Recovery Ltd | 03618962 | 20/08/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALBA TRUSTEES LIMITED | SC206404 | 19/01/2001 | 22/11/2002 | Dissolved |
| AVON BIO POWER LIMITED | 09716977 | 04/08/2015 | 03/05/2017 | Amber |
| AVONMOUTH BIO POWER (OPERATIONS) LIMITED | 09666577 | 13/04/2016 | 29/03/2018 | Dissolved |
| AVONMOUTH BIO POWER CONTRACTING LIMITED | 07061917 | 13/04/2016 | 29/03/2018 | Dissolved |
| AVONMOUTH BIO POWER ENERGY LIMITED | 07932861 | 13/04/2016 | 29/03/2018 | Dissolved |
| AVONMOUTH BIO POWER LIMITED | 09626128 | 13/04/2016 | 29/03/2018 | Dissolved |
| AVONMOUTH BIO POWER PROPERTY LIMITED | 07695099 | 13/04/2016 | 29/03/2018 | Dissolved |
| BILSTHORPE BIO POWER LIMITED | 09219870 | 16/09/2014 | 03/05/2017 | Gold |
| BIOGEN PROJECTS LIMITED | 09788012 | 22/09/2015 | 01/12/2016 | Dissolved |
| BIRMINGHAM BIO POWER LIMITED | 08145428 | 11/12/2012 | 19/03/2021 | Insolvent |
| CARBONARIUS LIMITED | 07086885 | 05/11/2010 | 17/03/2020 | Dissolved |
| CARBONARIUS2 LIMITED | 08136526 | 11/12/2012 | 15/04/2024 | One Red Flag |
| CARDIFF BIO POWER LIMITED | 10108211 | 07/04/2016 | 01/12/2016 | Dissolved |
| CG REALISATIONS 2023 LIMITED | 09161643 | 05/08/2014 | 11/03/2021 | Insolvent |
| DARTMOOR BIO POWER LIMITED | 09489779 | 13/03/2015 | 08/11/2017 | Dissolved |
| DARTMOOR OPERATIONS LIMITED | 09496553 | 18/03/2015 | 08/11/2017 | Dissolved |
| DDP DEVELOPMENTS LIMITED | 03265323 | 08/01/2007 | 19/04/2007 | Amber |
| DOCHERTY HEAT AND ENERGY DISTRIBUTOR LTD. | SC321455 | 26/10/2010 | 24/03/2011 | Dissolved |
| EASTHAM BIO POWER LIMITED | 09545668 | 16/04/2015 | 03/05/2017 | Gold |
| ESTECH EUROPE LIMITED | 04237146 | 03/03/2003 | 20/01/2005 | Dissolved |
| Estech Household Waste Recycling (Wolverhampton) Ltd | 04915104 | 30/09/2003 | 20/01/2005 | Dissolved |
| HOOTON BIO POWER LIMITED | 09386411 | 13/01/2015 | 03/05/2017 | One Red Flag |
| INCE BIO POWER LIMITED | 09386360 | 13/01/2015 | 10/09/2019 | One Red Flag |
| KAZ RESERO POWER (UK) LIMITED | 09545922 | 16/04/2015 | 01/12/2016 | Dissolved |
| MES ENVIRONMENTAL LIMITED | 02826294 | 18/11/1996 | 18/08/2000 | Insolvent |
| NORTH LANARKSHIRE BIO POWER LIMITED | 10215713 | 06/06/2016 | 01/12/2016 | Silver |
| NORTHERN BIO POWER LIMITED | 08722695 | 08/10/2013 | 17/10/2019 | Dissolved |
| O-GEN PLYMTREK LIMITED | 06620196 | 13/06/2008 | 02/06/2015 | Dissolved |
| O-GEN UK LIMITED | 06759792 | 23/12/2008 | 30/11/2020 | Amber |
| PEBBLEHALL BIO POWER LIMITED | 09181142 | 19/08/2014 | 12/04/2021 | One Red Flag |
| SEVERN BIO POWER LIMITED | 09716073 | 04/08/2015 | 03/05/2017 | Bronze |
| SOUTHMOOR BIO POWER LIMITED | 10215735 | 06/06/2016 | 01/12/2016 | Dissolved |
| SRG RENEWABLES LIMITED | SC221042 | 25/09/2001 | 22/11/2002 | Dissolved |
| STANLOW BIO POWER LIMITED | 09546038 | 16/04/2015 | 10/09/2019 | Bronze |
| STOKE ENERGY LIMITED | 05525420 | 02/08/2005 | 04/01/2017 | Insolvent |
| TEESSIDE BIO FUELS LIMITED | 10273753 | 12/07/2016 | 01/12/2016 | Not Trading |
| TYSELEY BIO POWER LIMITED | 08651766 | 15/08/2013 | 21/03/2022 | Dissolved |
| WELLAND BIO POWER LIMITED | 08336376 | 19/12/2012 | 12/04/2021 | One Red Flag |