| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| NEXEON LIMITED | 05717554 | 15/05/2020 | Silver |
| RHEON LABS LTD | 10828503 | 01/10/2023 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH CERAMIC RESEARCH | 00453225 | 13/09/2007 | 03/06/2015 | Dissolved |
| CERTECH INTERNATIONAL LIMITED | 01893781 | 15/03/2010 | 13/10/2015 | Not Trading |
| CONSORT MEDICAL LIMITED | 00406711 | 14/07/2014 | 04/02/2020 | Bronze |
| E/M COATINGS LIMITED | 01252250 | 17/04/2002 | 14/10/2002 | Strike Off |
| FIBERWEB LIMITED | 05683352 | 10/09/2012 | 15/11/2013 | Amber |
| International Graphite Services Ltd | 01419295 | 03/11/1994 | 11/03/1996 | Dissolved |
| JAMES CROPPER EBT LIMITED | 06377466 | 03/12/2018 | 09/11/2021 | Not Trading |
| JAMES CROPPER PUBLIC LIMITED COMPANY | 00030226 | 01/08/2018 | 09/11/2021 | Silver |
| KENOTEQ LTD | SC625638 | 05/07/2021 | 05/07/2024 | Amber |
| L3HARRIS RELEASE & INTEGRATED SOLUTIONS LTD | 00402684 | 20/07/1998 | 31/12/1999 | One Red Flag |
| LUCIDEON CICS LIMITED | 01871628 | 17/09/2001 | 15/12/2003 | Silver |
| MORGAN ADVANCED MATERIALS PLC | 00286773 | 28/07/2010 | 08/01/2016 | Bronze |
| MORGAN ELECTRO CERAMICS LIMITED | 00112286 | 15/03/2010 | 13/10/2015 | Not Trading |
| MORGAN TECHNICAL CERAMICS LIMITED | 00262938 | 18/07/2000 | 13/10/2015 | Silver |
| MORGANITE SPECIAL CARBONS LIMITED | 01034654 | 03/11/1994 | 11/03/1996 | Not Trading |
| Morgan Archer Ltd | 02033038 | 09/09/1994 | 08/05/2000 | Dissolved |
| Morgan Fuel Cells Ltd | 00896626 | 08/01/1996 | 09/06/2000 | Dissolved |
| SOUTHERN GRAPHITE SERVICES LIMITED | 01190207 | 03/11/1994 | 11/03/1996 | Strike Off |
| Sceld Two Ltd | 00516266 | 08/01/1996 | 09/06/2000 | Dissolved |
| THERMAL CERAMICS UK LIMITED | 00890443 | 31/10/2010 | 13/10/2015 | Bronze |