| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| A-BELCO LIMITED | 03881238 | 03/11/2015 | Dissolved |
| MEP BIM SOLUTIONS LIMITED | 08933005 | 03/11/2015 | Dissolved |
| MEP SOLUTIONS LIMITED | 02769705 | 03/11/2015 | Dissolved |
| OPSOL REALISATION 2016 LTD | 04603008 | 03/11/2015 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BANDWOOD LIMITED | 05420025 | 30/06/2005 | 01/05/2007 | Silver |
| Bladepark Ltd | 05419441 | 30/06/2005 | 01/05/2007 | Dissolved |
| Bladeplace Ltd | 05419451 | 30/06/2005 | 01/05/2007 | Dissolved |
| CARADON BIDCO 6 LIMITED | 04048935 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON BOILERS HOLDINGS LIMITED | 04048959 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON HEATING LIMITED | 01744824 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON PLUMBING LIMITED | 04049216 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON PLUMBING SOLUTIONS LIMITED | 04011010 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON RADIATORS HOLDINGS LIMITED | 03983137 | 12/07/2004 | 01/05/2007 | Dissolved |
| CARADON STELRAD LIMITED | 04049017 | 12/07/2004 | 01/05/2007 | Dissolved |
| EDWARD THOMPSON (PRINTERS) LIMITED | 00745108 | 02/04/2007 | 20/09/2013 | Bronze |
| EDWARD THOMPSON (PRINTERS) LIMITED | 00745108 | 15/06/2007 | 20/09/2013 | Bronze |
| EDWARD THOMPSON GROUP LIMITED | 04488223 | 30/08/2007 | 20/09/2013 | Not Trading |
| HENRAD (U.K.) LIMITED | 01857795 | 12/07/2004 | 01/05/2007 | Not Trading |
| IDEAL BOILERS LIMITED | 00322137 | 12/07/2004 | 01/05/2007 | Bronze |
| IDEAL HEATING LIMITED | 04049211 | 12/07/2004 | 01/05/2007 | Dissolved |
| IDEAL STELRAD GROUP LIMITED | 04049013 | 12/07/2004 | 01/05/2007 | Dissolved |
| ISG BOILER HOLDINGS LIMITED | 04048962 | 12/07/2004 | 01/05/2007 | Gold |
| KESTON BOILERS LIMITED | 03544589 | 31/07/2006 | 31/03/2007 | Silver |
| KESTON BOILERS SALES LIMITED | 04590889 | 31/07/2006 | 01/05/2007 | Dissolved |
| KESTON HOLDINGS LIMITED | 00795957 | 31/07/2006 | 01/05/2007 | Dissolved |
| LIFEART COFFINS NORTH LIMITED | 13661541 | 05/10/2021 | 16/11/2022 | Amber |
| NATURAL SUSTAINABLE ENERGY RESOURCES LIMITED | 04011009 | 12/07/2004 | 01/05/2007 | Dissolved |
| SIMPSON GROUP HOLDINGS LIMITED | 11299837 | 16/08/2019 | 16/11/2022 | Amber |
| SIMPSON GROUP LIMITED | 11171309 | 16/08/2019 | 16/11/2022 | Gold |
| SIMPSON PRINT LIMITED | 01061464 | 16/08/2019 | 16/11/2022 | Silver |
| STELRAD BATHROOM PRODUCTS LIMITED | 04049023 | 12/07/2004 | 01/05/2007 | Dissolved |
| STELRAD GROUP LIMITED | 04049020 | 12/07/2004 | 01/05/2007 | Dissolved |
| STELRAD LIMITED | 02263368 | 12/07/2004 | 01/05/2007 | Silver |
| STELRAD MANAGEMENT LIMITED | 04049093 | 12/07/2004 | 01/05/2007 | Silver |
| STELRAD RADIATOR HOLDINGS LIMITED | 03983125 | 12/07/2004 | 01/05/2007 | Silver |
| WARMSURE LIMITED | 05769525 | 15/05/2006 | 31/03/2007 | Dissolved |