| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AMICAE LIMITED | 12253481 | 10/10/2019 | Dissolved |
| AVON BIO POWER LIMITED | 09716977 | 12/12/2016 | Strike Off |
| AVONMOUTH BIO POWER (OPERATIONS) LIMITED | 09666577 | 13/04/2016 | Dissolved |
| AVONMOUTH BIO POWER CONTRACTING LIMITED | 07061917 | 13/04/2016 | Dissolved |
| AVONMOUTH BIO POWER ENERGY LIMITED | 07932861 | 13/04/2016 | Dissolved |
| AVONMOUTH BIO POWER LIMITED | 09626128 | 13/04/2016 | Dissolved |
| AVONMOUTH BIO POWER PROPERTY LIMITED | 07695099 | 13/04/2016 | Dissolved |
| BILSTHORPE BIO POWER LIMITED | 09219870 | 16/09/2014 | Strike Off |
| BOOM ENERGY LIMITED | 10312568 | 04/08/2016 | Amber |
| CARBONARIUS2 LIMITED | 08136526 | 10/07/2012 | Strike Off |
| CARDIFF BIO POWER LIMITED | 10108211 | 30/11/2016 | Dissolved |
| CARNBROE BIO POWER LIMITED | 10312897 | 04/08/2016 | Dissolved |
| CARNBROE PROPERTIES LIMITED | 10308075 | 02/08/2016 | Dissolved |
| CG REALISATIONS 2023 LIMITED | 09161643 | 05/08/2014 | Insolvent |
| COGEN HOLDINGS LIMITED | 10308185 | 02/08/2016 | Amber |
| CONCOCTIO LIMITED | 07652166 | 31/05/2011 | Not Trading |
| CRUMB RUBBER LTD. | 04465965 | 16/07/2004 | One Red Flag |
| CRUMB RUBBER LTD. | 04465965 | 20/06/2002 | One Red Flag |
| DEVONSHIRE 24 LIMITED | 06680300 | 22/08/2008 | Amber |
| DYNASLATE LIMITED | 06969296 | 22/07/2009 | Amber |
| EASTHAM BIO POWER LIMITED | 09545668 | 09/09/2015 | Gold |
| ERUS LIMITED | 11705602 | 30/11/2018 | One Red Flag |
| Ebee Developments Ltd | 03858764 | 11/10/1999 | Dissolved |
| HAY HALL BIO POWER LIMITED | 10312967 | 04/08/2016 | One Red Flag |
| HOUGHTON MAIN BIO POWER LIMITED | 10308338 | 02/08/2016 | Dissolved |
| ISLAND CONSTRUCTION (SW) LIMITED | 07457804 | 02/12/2010 | Dissolved |
| ISLAND PUBS LIMITED | 10308059 | 02/08/2016 | Amber |
| KAZ RESERO POWER (UK) LIMITED | 09545922 | 30/11/2016 | Dissolved |
| KINGSBRIDGE RUGBY FOOTBALL CLUB TRADING COMPANY LIMITED | 11876256 | 12/03/2019 | One Red Flag |
| MÔR HAFREN BIO POWER LIMITED | 10312928 | 04/08/2016 | Dissolved |
| NEXTERRA SYSTEMS CORP. | FC031759 | 10/07/2016 | Bronze |
| NORTH LANARKSHIRE BIO POWER LIMITED | 10215713 | 30/11/2016 | Silver |
| O-GEN UK LIMITED | 06759792 | 30/11/2020 | Amber |
| PORT CLARENCE ENERGY LIMITED | 08790013 | 07/06/2023 | Three Red Flags (Highest) |
| QUATTRO PROJECTS LIMITED | 07925075 | 26/01/2012 | Not Trading |
| QUINQUEVIR LIMITED | 07642162 | 20/05/2011 | Bronze |
| SCANDINAVIAN ENERGY CONTRACTOR OPERATIONS LIMITED | 10313042 | 04/08/2016 | Amber |
| SEVERN BIO POWER LIMITED | 09716073 | 12/12/2016 | Strike Off |
| SHORE ENERGY (CARNBROE) LIMITED | SC459592 | 19/04/2017 | Not Trading |
| SMALL HEATH BIO POWER LIMITED | 10307941 | 02/08/2016 | Dissolved |
| SOUTH LANARKSHIRE BIO POWER LIMITED | SC579421 | 20/10/2017 | Amber |
| SOUTH WEST BUSINESS VENTURES LLP | OC329304 | 25/06/2007 | Dissolved |
| SOUTHMOOR BIO POWER LIMITED | 10215735 | 30/11/2016 | Dissolved |
| TEESSIDE BIO FUELS LIMITED | 10273753 | 30/11/2016 | Not Trading |
| THAMES BIO POWER LTD | 10312734 | 04/08/2016 | Not Trading |
| THE BROOKING PLANT LIMITED | 15035827 | 28/07/2023 | Bronze |
| TYSELEY BIO POWER LIMITED | 08651766 | 23/01/2019 | Dissolved |
| UNA-CARB LIMITED | 09435202 | 11/02/2015 | Gold |
| UNA-QUIN LIMITED | 09435112 | 11/02/2015 | Gold |
| VERNEOS LIMITED | 07196749 | 02/11/2012 | Silver |
| WOMBLE ENERGY LIMITED | 14096546 | 10/05/2022 | One Red Flag |
| WOMBLE HOLDINGS LIMITED | 14882240 | 19/05/2023 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AIRPORT BUSINESS CENTRE LIMITED | 04867727 | 23/02/2004 | 23/05/2023 | Bronze |
| BACK2BUSINESS LIMITED | 06332513 | 02/08/2007 | 07/07/2014 | Not Trading |
| BIOGEN PROJECTS LIMITED | 09788012 | 30/11/2016 | 20/01/2019 | Dissolved |
| BIRMINGHAM BIO POWER LIMITED | 08145428 | 23/01/2019 | 19/03/2021 | Insolvent |
| BURTS CHIPS LIMITED | 03745420 | 01/04/2009 | 29/10/2014 | Not Trading |
| BURTS SNACKS LIMITED | 02665660 | 01/04/2009 | 28/10/2014 | Bronze |
| CARBONARIUS LIMITED | 07086885 | 25/11/2009 | 17/03/2020 | Dissolved |
| DARTMOOR BIO POWER LIMITED | 09489779 | 13/03/2015 | 08/11/2017 | Dissolved |
| DARTMOOR OPERATIONS LIMITED | 09496553 | 18/03/2015 | 08/11/2017 | Dissolved |
| HANDSIDE SOUTH WEST LIMITED | 06969337 | 22/07/2009 | 24/07/2010 | Dissolved |
| HIGHER HEATHFIELD MANAGEMENT COMPANY LIMITED | 03964667 | 05/04/2000 | 28/08/2003 | Silver |
| HOOTON BIO POWER LIMITED | 09386411 | 13/01/2015 | 23/10/2018 | Amber |
| INCE BIO POWER LIMITED | 09386360 | 13/01/2015 | 10/09/2019 | Amber |
| MOOFU EDUCATION LTD | 06254776 | 12/12/2008 | 04/03/2011 | Dissolved |
| NEXTERRA OPERATIONS LIMITED | 10308155 | 02/08/2016 | 05/12/2018 | Bronze |
| NORTH TEES PROPERTY LIMITED | 10308103 | 02/08/2016 | 02/11/2020 | One Red Flag |
| NORTHERN BIO POWER LIMITED | 08722695 | 08/10/2013 | 17/10/2019 | Dissolved |
| PEBBLEHALL BIO POWER LIMITED | 09181142 | 23/01/2019 | 12/04/2021 | One Red Flag |
| STANLOW BIO POWER LIMITED | 09546038 | 09/09/2015 | 10/09/2019 | Silver |
| STEM NETWORKS LIMITED | 05587008 | 24/11/2008 | 07/07/2014 | Not Trading |
| STOKELEY BARTON MANAGEMENT COMPANY LIMITED | 04104136 | 08/11/2000 | 08/10/2007 | Gold |
| THE UNA GROUP LIMITED | 05216676 | 02/02/2005 | 23/05/2023 | One Red Flag |
| TYSELEY BIO POWER LIMITED | 08651766 | 15/08/2013 | 14/11/2018 | Dissolved |
| UNA PROPERTY LIMITED | 09435197 | 11/02/2015 | 23/05/2023 | Gold |
| WELLAND BIO POWER LIMITED | 08336376 | 23/01/2019 | 12/04/2021 | One Red Flag |
| WENTLOOG LIMITED | 09192650 | 29/08/2014 | 03/01/2024 | One Red Flag |