| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ELDER ENGINEERING LIMITED | 01562497 | 04/06/1991 | Silver |
| Johnson Progress (Holdings) Ltd | 02255862 | 04/06/1991 | Dissolved |
| Johnson Progress (Properties) Ltd | 02999071 | 07/12/1994 | Dissolved |
| Johnson Progress Ltd | 02744472 | 01/12/1992 | Dissolved |
| Jp Filtration Ltd | 02255854 | 10/05/1991 | Dissolved |
| N C K Cranes Ltd | 03409010 | 25/07/1997 | Dissolved |
| Nck Crawler Cranes Ltd | 04035278 | 17/07/2000 | Dissolved |
| SPW TRAFFIC CONTROL LIMITED | 01554163 | 04/06/1991 | Strike Off |
| STAFFORDSHIRE PUBLIC WORKS COMPANY,LIMITED(THE) | 00200470 | 04/06/1991 | Dissolved |
| Spw Mechanical Engineers Ltd | 02308350 | 04/06/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DELDEN CRANE HIRE LIMITED | 06550610 | 17/04/2008 | 06/04/2012 | Not Trading |
| JOHNSON PROGRESS (2012) LIMITED | 08199669 | 30/04/2015 | 23/11/2022 | Silver |
| JOHNSON PROGRESS LIMITED | 06550537 | 17/04/2008 | 23/11/2022 | Not Trading |
| JP FILTRATION LIMITED | 06550587 | 17/04/2008 | 23/11/2022 | Not Trading |
| NCK LIMITED | 02416584 | 24/08/1991 | 06/04/2012 | Not Trading |
| NORTH STAFFORDSHIRE ENGINEERING GROUP TRAINING ASSOCIATION LIMITED | 00926888 | 22/11/1991 | 01/01/1998 | Gold |
| ROSS ENGINEERS LIMITED | 04283231 | 07/09/2001 | 23/11/2022 | Amber |
| S P W GROUP LIMITED | 04289360 | 18/09/2001 | 23/11/2022 | Not Trading |
| S.H. JOHNSON AND COMPANY LIMITED | 02549430 | 17/10/1991 | 23/11/2022 | Amber |
| SPW MECHANICAL ENGINEERS LIMITED | 06550422 | 01/04/2008 | 23/11/2022 | One Red Flag |