| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 4DELIVERY LIMITED | 05322479 | 12/12/2018 | 31/10/2022 | Silver |
| AYR ENVIRONMENTAL SERVICES LIMITED | SC198368 | 01/10/2010 | 25/10/2018 | Bronze |
| AYR ENVIRONMENTAL SERVICES OPERATIONS LIMITED | SC201810 | 21/11/2005 | 21/11/2005 | One Red Flag |
| AYR ENVIRONMENTAL SERVICES OPERATIONS LIMITED | SC201810 | 21/11/2005 | 25/10/2018 | One Red Flag |
| BRIGHTON & HOVE 4DELIVERY LIMITED | 06732453 | 12/12/2018 | 31/10/2022 | Silver |
| CALEDONIAN ENVIRONMENTAL LEVENMOUTH TREATMENT SERVICES LIMITED | 03991397 | 21/11/2005 | 25/10/2018 | Gold |
| CALEDONIAN ENVIRONMENTAL SERVICES HOLDINGS LIMITED | 03936960 | 01/10/2010 | 25/10/2018 | Silver |
| CALEDONIAN ENVIRONMENTAL SERVICES PLC | SC156608 | 01/10/2010 | 25/10/2018 | Silver |
| LYNN WIND FARM LIMITED | 04155137 | 06/12/2002 | 23/12/2003 | Bronze |
| NORTHUMBRIAN WATER PROJECTS LIMITED | 02528704 | 31/03/2008 | 25/10/2018 | Silver |
| RIDGE ROAD ENERGY LIMITED | 09547098 | 02/06/2015 | 25/10/2018 | Bronze |
| WASTEWATER MANAGEMENT HOLDINGS LIMITED | SC201429 | 01/10/2010 | 25/10/2018 | Bronze |
| WAVE UTILITIES LIMITED | 04047470 | 15/11/2013 | 18/04/2016 | Amber |