| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SIRIUS CIVIL ENGINEERING LIMITED | 05158885 | 03/09/2020 | Silver |
| SIRIUS DEMOLITION LTD | 06675850 | 03/09/2020 | Gold |
| SIRIUS DRILLING LTD | 07502493 | 03/09/2020 | Silver |
| SIRIUS ENGINEERING GROUP LTD | 04660007 | 03/09/2020 | Silver |
| SIRIUS ENVIRONMENTAL LTD | 07057801 | 03/09/2020 | Silver |
| SIRIUS GEOTECHNICAL LTD | 04676011 | 03/09/2020 | Amber |
| SIRIUS MIDLANDS LTD | 06675852 | 03/09/2020 | Dissolved |
| SIRIUS PLANT LTD | 10518182 | 03/09/2020 | Silver |
| SIRIUS REMEDIATION LIMITED | 04860112 | 03/09/2020 | Bronze |
| SIRIUS RENEWABLE ENERGY (INVESTMENTS) LIMITED | 12889668 | 03/03/2021 | One Red Flag |
| SIRIUS RENEWABLE ENERGY LTD | 10925888 | 03/09/2020 | Bronze |
| SOTHIS GROUP LIMITED | 06675487 | 03/09/2020 | Dissolved |
| SRE (HALFWAY) LTD | 10980752 | 03/09/2020 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CADEMUIR ENGINEERING LIMITED | SC069993 | 26/07/2017 | 28/02/2018 | Bronze |
| H C S DRAIN SERVICES LIMITED | 04758344 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH & COMPANY LIMITED | 00415592 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH AGGREGATES LIMITED | 01277269 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH CIVIL ENGINEERING LIMITED | 03104421 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH CONTRACTS LIMITED | 00445590 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH HOLDINGS LIMITED | 05314796 | 01/04/2011 | 06/01/2015 | Dissolved |
| OWEN PUGH PROPERTIES LIMITED | 06252475 | 01/04/2011 | 06/01/2015 | Dissolved |