| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| METROPOLITAN EUROPEAN TRANSPORT LIMITED | 07521703 | 08/02/2011 | Dissolved |
| MOVELL - THE BUS COMPANY LIMITED | 09048671 | 20/05/2014 | Dissolved |
| SCOTTISH WATER BUSINESS STREAM HOLDINGS LIMITED | SC332622 | 01/04/2017 | Gold |
| SCOTTISH WATER HORIZONS HOLDINGS LIMITED | SC334620 | 01/04/2017 | Gold |
| TRANSPORT INVESTMENT LIMITED | 07047282 | 02/11/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BLAZE MANUFACTURING SOLUTIONS LTD. | SC306482 | 01/08/2019 | 16/12/2019 | Amber |
| CABOT ENERGY LIMITED | 02933545 | 12/02/2014 | 26/07/2018 | One Red Flag |
| DNO NORTH SEA (ENERGY) LIMITED | 04848025 | 26/04/2010 | 28/06/2013 | Not Trading |
| DNO NORTH SEA (U.K.) LIMITED | 04848017 | 04/05/2009 | 28/06/2013 | Bronze |
| DNO NORTH SEA PLC | 04622251 | 04/05/2009 | 28/06/2013 | Amber |
| DNO NORTH SEA SIP EMPLOYEE BENEFIT TRUST LIMITED | 07432949 | 08/11/2010 | 28/06/2013 | Not Trading |
| TRANSPORT INVESTMENT LIMITED | 07534835 | 18/02/2011 | 31/07/2019 | Not Trading |
| UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED | 03857752 | 12/08/2014 | 30/09/2019 | Silver |