| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Aram Properties Ltd | 03893801 | 01/04/2005 | Dissolved |
| Aram Quarries Ltd | 03388960 | 01/04/2005 | Dissolved |
| Aramix Ltd | 03441954 | 01/04/2005 | Dissolved |
| HIGHWAYS WASTE LIMITED | 03395106 | 01/04/2005 | Dissolved |
| Lamarco Ltd | 04031611 | 01/04/2005 | Dissolved |
| Rovas Light & Power Ltd | 02864492 | 01/04/2005 | Dissolved |
| S.W.T.D. Ltd. | 03370939 | 01/04/2005 | Dissolved |
| South Western Tar Distilleries Ltd. | 03370611 | 01/04/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A ONE INTEGRATED HIGHWAY SERVICES LIMITED | 03695888 | 01/04/2005 | 31/10/2020 | Not Trading |
| AFS-COLAS LIGHTING LIMITED | 04014184 | 01/04/2005 | 31/10/2020 | Dissolved |
| ARAM RESOURCES LIMITED | 03358080 | 01/04/2005 | 31/10/2010 | Not Trading |
| BITUMAC LIMITED | 02864489 | 01/04/2005 | 31/10/2020 | Dissolved |
| COLAS HIGHWAY SERVICES LIMITED | 03551032 | 01/04/2005 | 31/10/2020 | Dissolved |
| COLAS LIMITED | 02644726 | 01/04/2005 | 31/10/2020 | One Red Flag |
| COLCON LIMITED | 00202709 | 01/04/2005 | 31/10/2020 | Not Trading |
| ENSIGN HIGHWAYS HOLDINGS LIMITED | 05148685 | 28/11/2007 | 31/10/2020 | Gold |
| ENSIGN HIGHWAYS LIMITED | 05133561 | 28/11/2007 | 31/10/2020 | Silver |
| FIBREDEC LIMITED | 02864500 | 01/04/2005 | 31/10/2020 | Dissolved |
| LION EMULSIONS LIMITED | 02864497 | 01/04/2005 | 31/10/2020 | Dissolved |
| RETREAD (ROADS) LIMITED | 02864496 | 01/04/2005 | 31/10/2020 | Dissolved |
| SAFEDRAIN LIMITED | 02864494 | 01/04/2005 | 31/10/2020 | Dissolved |
| SOUTH WEST HIGHWAYS LIMITED | 03021985 | 01/04/2005 | 31/01/2018 | Bronze |
| SPRAYGRIP LIMITED | 02864501 | 01/04/2005 | 31/10/2020 | Dissolved |
| TREGUNNON QUARRY LIMITED | 03112045 | 01/04/2005 | 31/10/2020 | Amber |
| WEST OF ENGLAND QUARRY COMPANY LIMITED | 03315476 | 01/04/2005 | 31/10/2020 | Not Trading |
| WIGHT HIGHWAYS LIMITED | 03752277 | 01/04/2005 | 31/10/2020 | Dissolved |