| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHRIS B2B LTD | SC465966 | 16/12/2013 | Gold |
| EAST OF SCOTLAND WATER LIMITED | SC184569 | 30/06/2004 | Dissolved |
| NORTH OF SCOTLAND WATER LIMITED | SC165686 | 01/05/2002 | Dissolved |
| WATERMARQUE LIMITED | SC184568 | 01/08/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AGUA VIA LIMITED | 06420717 | 01/06/2021 | 11/05/2022 | Amber |
| ALAUNA RENEWABLE ENERGY LIMITED | 07586543 | 21/05/2013 | 27/03/2014 | Bronze |
| ALEXANDER MACRAE GLOBAL LIMITED | SC588637 | 01/12/2018 | 18/11/2022 | Gold |
| BARNEY PRECAST LIMITED | 02393312 | 01/10/2000 | 01/03/2001 | Amber |
| CENTRAL MARKET AGENCY LIMITED | SC328635 | 01/08/2007 | 23/01/2014 | Gold |
| ENNEUROPE LIMITED | 04254360 | 22/11/2001 | 29/07/2005 | Amber |
| GSI CORPORATION LTD | SC398080 | 26/03/2015 | 12/01/2017 | One Red Flag |
| ONESOURCE INFRASTRUCTURE SERVICES LIMITED | SC334582 | 28/11/2007 | 15/11/2013 | Dissolved |
| SCOTTISH WATER HORIZONS HOLDINGS LIMITED | SC334620 | 29/11/2007 | 27/03/2014 | Gold |
| SCOTTISH WATER HORIZONS LIMITED | SC264806 | 11/03/2004 | 27/03/2014 | Silver |
| SCOTTISH WATER INTERNATIONAL LIMITED | SC415570 | 27/01/2012 | 27/03/2014 | Silver |
| SCOTTISH WATER LIMITED | SC207004 | 26/02/2004 | 15/11/2013 | Silver |
| SCOTTISH WATER RETAIL LIMITED | SC271640 | 05/08/2004 | 15/11/2013 | Silver |
| SCOTTISH WATER SOLUTIONS LIMITED | SC233277 | 08/08/2003 | 20/06/2007 | Dissolved |
| SCOTTISH WATER TECHNOLOGY LIMITED | SC296713 | 07/02/2006 | 15/11/2013 | Dissolved |
| SCOTTISH WATER UTILITIES LIMITED | SC271639 | 05/08/2004 | 15/11/2013 | Silver |
| SCOTTISH WATER WHOLESALE LIMITED | SC271641 | 05/08/2004 | 15/11/2013 | Silver |
| SELECTUSONLINE LIMITED | 04077163 | 05/02/2008 | 28/11/2008 | Not Trading |
| THE STEAMSHIP SIR WALTER SCOTT LIMITED | SC277474 | 31/03/2005 | 07/12/2007 | Bronze |
| WATER SOLUTIONS LIMITED | SC189952 | 24/01/2011 | 15/11/2013 | Dissolved |