| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADPO PROJECTS LIMITED | 06816997 | 15/10/2009 | Dissolved |
| Armadillo Partners Ltd | 06582009 | 01/05/2008 | Dissolved |
| BASEPOWER LIMITED | 09124995 | 10/07/2014 | Silver |
| CALLINGTON SUSTAINABLE ENERGY LIMITED | 11113214 | 15/12/2017 | Gold |
| CREWE SUSTAINABLE ENERGY LIMITED | 14614493 | 24/01/2023 | Not Trading |
| Cambridge Edge Ltd | 04678574 | 26/02/2003 | Dissolved |
| DOMINO ENERGY LIMITED | 09945075 | 18/03/2016 | Silver |
| FEATHERMILE LIMITED | 04649116 | 06/12/2006 | Dissolved |
| Flexistone Ltd | 06241542 | 09/05/2007 | Dissolved |
| HAMS HALL SUSTAINABLE ENERGY LTD | 11811570 | 07/02/2019 | One Red Flag |
| Intranext Ltd | 04677257 | 25/02/2003 | Dissolved |
| Live Result Ltd | 03909242 | 19/01/2000 | Dissolved |
| MEASHAM SUSTAINABLE HEAT AND POWER LTD | 10025841 | 22/03/2016 | One Red Flag |
| POOLE SUSTAINABLE ENERGY LIMITED | 12046017 | 12/06/2019 | Bronze |
| PRESTON SUSTAINABLE HEAT AND POWER LIMITED | 10001568 | 18/03/2016 | Bronze |
| RIVERSIDE SUSTAINABLE ENERGY LIMITED | 14614267 | 24/01/2023 | Not Trading |
| SCALA DISTRIBUTION LIMITED | 10437698 | 24/03/2017 | Silver |
| SEEBECK 143 LIMITED | 10025838 | 22/03/2016 | Not Trading |
| SEEDBEDS DEVELOPMENTS LIMITED | 11570455 | 14/09/2018 | Not Trading |
| SEEDBEDS LIMITED | 08851986 | 20/01/2014 | Not Trading |
| SIGHTLINE ENERGY LIMITED | 09947901 | 22/03/2016 | Amber |
| STRANRAER SUSTAINABLE ENERGY LIMITED | 09822657 | 13/10/2015 | Not Trading |
| STRANRAER SUSTAINABLE HEAT AND POWER LIMITED | 10001358 | 18/03/2016 | Bronze |
| SYMMETRY BASEPOWER ASTON CLINTON LIMITED | 14165884 | 10/06/2022 | Amber |
| SYMMETRY BASEPOWER BICESTER LIMITED | 14531108 | 08/12/2022 | Amber |
| SYMMETRY BASEPOWER BIGGLESWADE LIMITED | 11550492 | 04/09/2018 | One Red Flag |
| SYMMETRY BASEPOWER DONCASTER LIMITED | 13057409 | 02/12/2020 | Bronze |
| SYMMETRY BASEPOWER KETTERING LIMITED | 14165590 | 10/06/2022 | One Red Flag |
| SYMMETRY BASEPOWER MERSEYSIDE LIMITED | 14528365 | 07/12/2022 | Silver |
| SYMMETRY BASEPOWER RUGBY LIMITED | 13434749 | 02/06/2021 | One Red Flag |
| Seedbeds Group Plc | 06242490 | 10/05/2007 | Dissolved |
| Seedbeds Ventures Ltd | 06241561 | 09/05/2007 | Dissolved |
| TALYLLYN HOLDINGS LIMITED | 00511996 | 18/07/2014 | Bronze |
| THE TALYLLYN RAILWAY COMPANY | ZC000204 | 18/07/2014 | Amber |
| TRENT SUSTAINABLE ENERGY LIMITED | 14614566 | 24/01/2023 | Not Trading |
| WARRINGTON SUSTAINABLE ENERGY LTD | 11811906 | 07/02/2019 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIOGEN (UK) LIMITED | 05616520 | 19/05/2008 | 12/05/2009 | Silver |
| BRUMAIRE LIMITED | 03897800 | 21/12/1999 | 26/10/2000 | Dissolved |
| Brumaire Services Ltd | 03927725 | 05/06/2000 | 26/10/2000 | Dissolved |
| CLAPHAM PROPERTIES (BRIGHTON) LTD | 04443253 | 30/07/2003 | 01/03/2007 | Bronze |
| GREENFINCH LIMITED | 02829513 | 29/10/2008 | 12/05/2009 | Strike Off |
| HOLBEACH BIOGAS LIMITED | 07739876 | 12/07/2012 | 23/07/2014 | Bronze |
| OPTIMA-LIFE LIMITED | 06306099 | 11/06/2008 | 23/09/2019 | Gold |
| SUTTON GRANGE AD LIMITED | 07948621 | 19/03/2013 | 30/10/2013 | One Red Flag |
| TAMAR ENERGY DEVELOPMENT COMPANY LIMITED | 03856752 | 11/10/1999 | 23/07/2014 | One Red Flag |
| TAMAR ENERGY LIMITED | 07703877 | 21/02/2012 | 25/04/2012 | Gold |