| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| QTS CIVIL ENGINEERING LTD | SC346109 | 23/07/2008 | Dissolved |
| QTS CONSTRUCTION SERVICES LTD. | SC346111 | 23/07/2008 | Dissolved |
| QTS GROUP LTD. | SC346116 | 24/07/2008 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DAMAS DEVELOPMENTS LTD. | SC233237 | 25/06/2002 | 22/12/2011 | Dissolved |
| Q.T.S. Technical Services Ltd | SC203141 | 25/08/2000 | 31/03/2004 | Dissolved |
| QTS RAIL LTD | SC346110 | 23/07/2008 | 10/05/2018 | Not Trading |
| QTS TRAINING LTD | SC346108 | 23/07/2008 | 10/05/2018 | Silver |