| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| A Y D LIMITED | 05660556 | 20/01/2006 | Silver |
| ARRESTYD LIMITED | 07474014 | 20/12/2010 | Silver |
| Invetek (Marketing) Ltd | 02173853 | 03/11/1992 | Dissolved |
| Invetek (Marketing) Ltd | 02173853 | 03/11/1991 | Dissolved |
| Invetek (Products) Ltd | 02173717 | 03/11/1991 | Dissolved |
| Modswitch Ltd | 02431710 | 10/03/1994 | Dissolved |
| Modswitch Ltd | 02431710 | 11/03/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Atal Syrthio Ltd | 02836294 | 09/07/1994 | 30/04/1998 | Dissolved |
| HEIGHTLIST SAFETY LIMITED | 08337073 | 19/12/2012 | 14/03/2014 | Dissolved |
| Invetek (Products) Ltd | 02173717 | 03/11/1991 | 18/11/1992 | Dissolved |
| Invetek Plc | 02035286 | 17/10/1992 | 28/06/1993 | Dissolved |