| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Greenberg-Hansen Ltd | 03172150 | 24/07/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CEDOR LIMITED | 10214354 | 03/06/2016 | 31/08/2021 | Bronze |
| CONDUIT CONSTRUCTION NETWORK LIMITED | 05460879 | 11/11/2005 | 31/08/2021 | One Red Flag |
| Fire Resistant Glass and Glazed Systems Association | 02801891 | 19/03/1993 | 17/03/1998 | Dissolved |
| HANSEN GLASS PROCESSING LIMITED | 02583327 | 01/11/1995 | 01/09/1998 | Dissolved |
| Harris Architectural Metalwork Ltd | 00481790 | 28/03/1992 | 01/03/1993 | Dissolved |
| MAGHANSEN LIMITED | 02737254 | 10/02/1993 | 25/06/2004 | Dissolved |
| NT SITTINGBOURNE LIMITED | 01041771 | 02/06/1992 | 01/03/1993 | Dissolved |
| Newman Tonks (Gateshead) Ltd | 01920584 | 28/03/1992 | 01/03/1993 | Dissolved |
| PARKWAY 4 LIMITED | 02361297 | 31/05/1996 | 24/06/2002 | Dissolved |