| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| FLEXTIME LIMITED | 07383704 | 22/09/2010 | Insolvent |
| M P T K LIMITED LIABILITY PARTNERSHIP | OC306268 | 09/12/2003 | Dissolved |
| SIRIUS CIVIL ENGINEERING LIMITED | 05158885 | 21/06/2004 | Silver |
| SIRIUS DEMOLITION LTD | 06675850 | 18/08/2008 | Gold |
| SIRIUS DEV (OAKLANDS) LTD | 12774308 | 28/07/2020 | Amber |
| SIRIUS DRILLING LTD | 07502493 | 24/01/2011 | Silver |
| SIRIUS ENGINEERING GROUP LTD | 04660007 | 01/09/2003 | Silver |
| SIRIUS ENVIRONMENTAL LTD | 07057801 | 08/03/2010 | Silver |
| SIRIUS GEOTECHNICAL LTD | 04676011 | 31/07/2013 | Amber |
| SIRIUS MIDLANDS LTD | 06675852 | 18/08/2008 | Dissolved |
| SIRIUS PLANNING LTD | 10518189 | 25/06/2019 | Bronze |
| SIRIUS PLANT LTD | 10518182 | 25/06/2019 | Silver |
| SIRIUS REMEDIATION LIMITED | 04860112 | 26/08/2003 | Bronze |
| SIRIUS RENEWABLE ENERGY LTD | 10925888 | 25/06/2019 | Bronze |
| SOTHIS GROUP LIMITED | 06675487 | 18/08/2008 | Dissolved |
| SRE (HALFWAY) LTD | 10980752 | 25/06/2019 | Dissolved |
| STRATUS RENEWABLE ENERGY LIMITED | 08744523 | 23/10/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ELM SOLAR (DARRAN) LIMITED | 09827877 | 25/06/2019 | 24/03/2020 | Amber |
| SIRIUS DRILLING SERVICES LIMITED | 06075338 | 31/01/2007 | 08/04/2014 | Dissolved |
| SIRIUS STRATEGIC ENVIRONMENTAL MANAGEMENT LIMITED | 06473957 | 15/01/2008 | 08/04/2014 | Dissolved |
| WR (ALFRETON) LIMITED | 09219326 | 25/06/2019 | 24/03/2020 | Bronze |
| WR (HAREGROVE) LIMITED | 09495795 | 25/06/2019 | 24/03/2020 | One Red Flag |
| WR (LOUNGE) LIMITED | 09498086 | 25/06/2019 | 24/03/2020 | Bronze |
| WR (PEN Y FAN) LIMITED | 10362515 | 25/06/2019 | 24/03/2020 | Bronze |
| WR (TECHBOARD) LIMITED | 09811075 | 25/06/2019 | 24/03/2020 | Silver |
| WR ENERGY LIMITED | 08720149 | 07/10/2013 | 24/03/2020 | Bronze |