| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DUTYBOUND LIMITED | 02896552 | 31/03/2011 | Dissolved |
| THE EUROPEAN MARINE ENERGY CENTRE LIMITED | SC249331 | 26/03/2014 | Silver |
| WRC EVALUATION AND TESTING CENTRE LIMITED | 02113721 | 15/10/2019 | Dissolved |
| WRC P.L.C. | 02262098 | 01/11/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADVANTICA CORPORATE VENTURES LIMITED | 02450936 | 01/05/2004 | 18/10/2004 | Dissolved |
| ADVANTICA INTELLECTUAL PROPERTY LIMITED | 02732228 | 01/05/2004 | 18/10/2004 | Silver |
| ASSOCIATED EMPLOYERS TRUSTEE LIMITED | 03489842 | 01/01/2016 | 03/12/2019 | Dissolved |
| BUILDCERT LIMITED | 03643572 | 02/05/2006 | 31/03/2011 | Dissolved |
| COGNICA LIMITED | 03498533 | 29/04/2019 | 18/08/2020 | One Red Flag |
| EMEC HYDROGEN LIMITED | SC591376 | 28/03/2018 | 20/08/2021 | Not Trading |
| GL INDUSTRIAL SERVICES UK LTD | 03294136 | 01/05/2004 | 18/10/2004 | Gold |
| Iwa Uk Committee | 02159946 | 14/02/1992 | 04/09/1996 | Dissolved |
| NSF WALES LIMITED | 03754780 | 09/03/2005 | 31/03/2011 | Bronze |
| Risx Environmental Management Ltd | SC199657 | 01/05/2004 | 18/10/2004 | Dissolved |
| Risx Ltd | SC169033 | 01/05/2004 | 18/10/2004 | Dissolved |
| Stoner Associates Europe Ltd | 02593248 | 01/05/2004 | 18/10/2004 | Dissolved |
| WATER RESEARCH CENTRE LIMITED | 11172223 | 26/01/2018 | 18/08/2020 | One Red Flag |