| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| FLEXTIME LIMITED | 07383704 | 22/09/2010 | Insolvent |
| SIRIUS MIDLANDS LTD | 06675852 | 18/08/2008 | Dissolved |
| SOTHIS GROUP LIMITED | 06675487 | 18/08/2008 | Dissolved |
| STRATUS RENEWABLE ENERGY LIMITED | 08744523 | 23/10/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| RICHMONDSHIRE LEISURE TRUST | 05095316 | 30/09/2013 | 25/09/2017 | Silver |
| SIRIUS CIVIL ENGINEERING LIMITED | 05158885 | 21/06/2004 | 17/10/2023 | Silver |
| SIRIUS DEMOLITION LTD | 06675850 | 18/08/2008 | 17/10/2023 | Gold |
| SIRIUS DRILLING LTD | 07502493 | 26/01/2011 | 17/10/2023 | Silver |
| SIRIUS DRILLING SERVICES LIMITED | 06075338 | 31/01/2007 | 08/04/2014 | Dissolved |
| SIRIUS ENVIRONMENTAL LTD | 07057801 | 08/03/2010 | 17/10/2023 | Silver |
| SIRIUS GEOTECHNICAL LTD | 04676011 | 23/05/2003 | 17/10/2023 | Amber |
| SIRIUS REMEDIATION LIMITED | 04860112 | 31/07/2013 | 17/10/2023 | Bronze |
| SIRIUS STRATEGIC ENVIRONMENTAL MANAGEMENT LIMITED | 06473957 | 15/01/2008 | 08/04/2014 | Dissolved |
| WR ENERGY LIMITED | 08720149 | 07/10/2013 | 24/01/2020 | Bronze |