| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| IMCO (62000) LIMITED | 03905626 | 01/01/2014 | Amber |
| SAFFIL 2011 LIMITED | 07696889 | 01/01/2014 | Amber |
| SAFFIL LIMITED | 03646114 | 01/01/2014 | Bronze |
| UNIFRAX (DERBY) LIMITED | 01747354 | 23/01/2020 | Bronze |
| UNIFRAX EUROPE HOLDINGS LIMITED | 04871772 | 01/01/2014 | Gold |
| UNIFRAX LIMITED | 04007148 | 01/01/2014 | Silver |
| UNIFRAX UK HOLDCO LIMITED | 04050796 | 01/01/2014 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| UNIFRAX EMISSION CONTROL EUROPE LTD | 01978805 | 01/01/2014 | 29/01/2021 | One Red Flag |