| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Barrier North East Ltd | 01893507 | 30/09/2000 | Dissolved |
| INNVOTECH LIMITED | 01748748 | 31/07/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BARRIER FIRE PROTECTION LIMITED | 03672680 | 24/11/1998 | 08/06/2006 | Silver |
| BARRIER GROUP LIMITED | 03673848 | 25/11/1998 | 24/07/2015 | Silver |
| BARRIER WIND ENERGY LIMITED | 03672681 | 24/11/1998 | 30/03/2015 | Dissolved |