| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Cavisys Holdings Ltd | 05359215 | 09/05/2005 | Dissolved |
| Cavisys Ltd | 05359431 | 09/05/2005 | Dissolved |
| Engineering Services to Insurers Ltd | 03796784 | 12/08/1999 | Dissolved |
| Environmental Investments Llp | OC313157 | 05/07/2005 | Dissolved |
| Environmental Project Management Ltd | 02737590 | 05/08/1993 | Dissolved |
| Porterswood Ltd | 02834668 | 08/02/2001 | Dissolved |
| Stats Consultancy Ltd | 02793160 | 24/02/1993 | Dissolved |
| Stats Geotechnical Ltd | 02793158 | 24/02/1993 | Dissolved |
| Stats Q A Ltd | 02198392 | 31/01/1992 | Dissolved |
| Stats Q.A. Gulf Limited | 02684520 | 05/02/1993 | Dissolved |
| Stats U K Ltd | 00986413 | 31/01/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CHILTERN OPEN-AIR MUSEUM LIMITED | 01279396 | 21/09/2009 | 23/02/2021 | Amber |
| GLANVILLE CONSULTANTS LIMITED | 01912317 | 16/12/1993 | 16/07/2015 | Silver |
| RSK ENVIRONMENT LIMITED | SC115530 | 01/04/2012 | 02/11/2023 | Silver |
| RSK STATS LIMITED | 02833839 | 23/09/1993 | 21/05/2021 | Dissolved |
| STATS PROJECTS LIMITED | 03751533 | 14/04/1999 | 28/11/2001 | Dissolved |