| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CALVERLEY LANE (SDL SITE) LIMITED | 12655502 | 09/06/2020 | Dissolved |
| HOUNDSWOOD (SDL SITE) LIMITED | 12062781 | 21/06/2019 | One Red Flag |
| S D LAUNCHBURY HOLDINGS LIMITED | 10891859 | 31/07/2017 | One Red Flag |
| SDL BIOMASS (NORTH) LIMITED | 11130665 | 03/01/2018 | Dissolved |
| SDL BIOMASS (SOUTH) LIMITED | 10819201 | 20/09/2017 | One Red Flag |
| SDL BIOMASS LIMITED | 07556433 | 08/03/2011 | One Red Flag |
| SDL CONSTRUCTION & CIVIL ENGINEERING LIMITED | 12062759 | 21/06/2019 | One Red Flag |
| SDL ESCO LIMITED | 10897222 | 03/08/2017 | One Red Flag |
| SDL PELLETS LIMITED | 10897042 | 03/08/2017 | Dissolved |
| SDL PELLETS LIMITED | 14398960 | 14/03/2024 | Bronze |
| SDL SAWMILLS LIMITED | 14643737 | 14/03/2024 | Bronze |
| SIBSEY BIOMASS LIMITED | 11087606 | 29/11/2017 | One Red Flag |
| STANLEY'S BIOMASS LIMITED | 09995463 | 09/02/2016 | One Red Flag |
| ULTRA HILLIER LTD | 13017442 | 13/11/2020 | Bronze |
| WESTINGTON BIOMASS LIMITED | 11218660 | 21/02/2018 | Dissolved |
| ZZ TOPCO LIMITED | 15528340 | 28/02/2024 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| S D LAUNCHBURY LIMITED | 10890974 | 31/07/2017 | 16/01/2024 | Silver |
| SDL PELLETS LIMITED | 14398960 | 05/10/2022 | 23/11/2023 | Bronze |
| SDL SAWMILLS LIMITED | 14643737 | 06/02/2023 | 23/11/2023 | Bronze |
| THE UK PELLET COUNCIL | 08869506 | 01/04/2019 | 02/02/2021 | Gold |