| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BASE3 LIMITED | 06837946 | 05/03/2009 | Dissolved |
| CONTAINERISED ENERGY SOLUTIONS LIMITED | 08412744 | 21/02/2013 | Dissolved |
| ENPAL LIMITED | 09003242 | 17/04/2014 | Amber |
| FAIR HEAT EOT TRUSTEE LIMITED | 16037565 | 23/10/2024 | Amber |
| FAIR HEAT HOLDING COMPANY LIMITED | 12054307 | 17/06/2019 | Bronze |
| FAIR HEAT LIMITED | 09408296 | 27/01/2015 | One Red Flag |
| FECP LIMITED | 07512065 | 01/02/2011 | Dissolved |
| FONTEN SOLAR CAPITAL ITALY LIMITED | 07079189 | 17/11/2009 | Dissolved |
| FONTENERGY LTD | 06015657 | 01/12/2006 | Dissolved |
| FS SOLAR R&D LIMITED | 07649236 | 26/05/2011 | Dissolved |
| GURU SYSTEMS LIMITED | 08172055 | 08/08/2012 | One Red Flag |
| HOFSCO LIMITED | 09268908 | 17/10/2014 | Dissolved |
| LANCASHIRE HEAT SERVICES LIMITED | 08413690 | 21/02/2013 | Dissolved |
| RESBOX LIMITED | 08170452 | 07/08/2012 | Dissolved |
| SALFORD HEAT SERVICES LIMITED | 08413219 | 21/02/2013 | Dissolved |
| SOL.EVO LIMITED | 07668234 | 14/06/2011 | Dissolved |
| SOLSPACE LIMITED | 06817118 | 12/02/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BOXED ENERGY LIMITED | 08333841 | 17/12/2012 | 15/12/2014 | One Red Flag |
| BOXED ESCO SERVICES LIMITED | 09178335 | 28/11/2014 | 23/06/2015 | Amber |
| BOXED MANAGEMENT SERVICES LIMITED | 08170605 | 07/08/2012 | 24/09/2014 | One Red Flag |
| ENNFI LTD | 07274655 | 07/06/2010 | 20/09/2010 | Dissolved |
| INSITE ENERGY LIMITED | 07073730 | 16/03/2010 | 30/11/2015 | Bronze |
| INSITE HOLDCO LIMITED | 09107226 | 30/06/2014 | 01/12/2015 | One Red Flag |