| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Montgomery Watson Ltd | 04208168 | 28/06/2001 | Dissolved |
| Montgomery Watson Projects Ltd | 02339158 | 20/08/2002 | Dissolved |
| Stirling Water Esk Ltd | SC192308 | 25/02/1999 | Dissolved |
| Watson Desmonde Ltd | 02201789 | 18/11/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Montgomery Watson Projects Ltd | 02339158 | 01/12/1994 | 08/01/1998 | Dissolved |
| STANTEC EUROPE LIMITED | 02438136 | 18/08/1999 | 27/04/2006 | Silver |
| STANTEC TREATMENT GROUP LIMITED | 04635724 | 28/02/2003 | 24/10/2005 | Dissolved |
| STANTEC UK LIMITED | 01188070 | 02/10/1995 | 05/03/2008 | Silver |
| STIRLING WATER SEAFIELD FINANCE PLC | SC190621 | 22/02/1999 | 09/07/2008 | Bronze |
| STIRLING WATER SEAFIELD HOLDINGS LIMITED | SC190803 | 22/02/1999 | 09/07/2008 | Silver |
| STIRLING WATER SEAFIELD LIMITED | SC182250 | 29/04/1998 | 09/07/2008 | Bronze |
| TURNBULL INFRASTRUCTURE & UTILITIES LIMITED | 03652435 | 18/12/2001 | 17/01/2003 | Bronze |
| WATERMARK (YORKSHIRE) LTD | 05090494 | 02/04/2005 | 05/05/2006 | Dissolved |
| WHITELEAF GOLF CLUB,LIMITED(THE) | 00202369 | 08/03/1991 | 08/05/1993 | Silver |