| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALUMAX EXTRUSIONS LIMITED | 00758916 | 14/09/2001 | Dissolved |
| Alcoa Systems (U K) Ltd | 01320531 | 19/06/2008 | Dissolved |
| Aluminium Supply Aerospace Distribution Ltd | 04130495 | 19/12/2000 | Dissolved |
| Kaynar Technologies Ltd | 02867469 | 19/06/2008 | Dissolved |
| Uk Aluminium Holdings Ltd | 03981366 | 31/10/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALLOY TECHNOLOGIES (UK) LIMITED | 02965664 | 19/06/2008 | 11/09/2020 | Gold |
| ALUMAX U.K. LIMITED | 03136596 | 14/09/2001 | 01/02/2020 | Dissolved |
| ARCONIC CLOSURE SYSTEMS INTERNATIONAL (UK) LIMITED | 00640988 | 19/06/2008 | 01/02/2020 | Amber |
| ARCONIC MANUFACTURING (GB) LIMITED | 00633328 | 14/09/2001 | 01/02/2020 | One Red Flag |
| ARCONIC UK FINANCE | 04100571 | 27/10/2000 | 01/02/2020 | Bronze |
| ARCONIC UK HOLDINGS LIMITED | 04099001 | 25/10/2000 | 01/02/2020 | Silver |
| BAL 1996 LIMITED | 03081702 | 31/10/2000 | 27/03/2001 | Dissolved |
| BRITISH ALUMINIUM LIMITED | 03981390 | 31/10/2000 | 11/09/2020 | Gold |
| FAIRCHILD FASTENERS (UK) LIMITED | 01118517 | 08/07/2011 | 01/02/2020 | Dissolved |
| HARRISON COMMONS HOLDINGS LIMITED | 03293207 | 01/02/2008 | 29/02/2008 | Bronze |
| HOWMET FASTENING SYSTEMS LIMITED | 01736094 | 01/03/2014 | 31/08/2020 | Gold |
| HOWMET LIMITED | 02659893 | 19/12/2000 | 31/08/2020 | Silver |
| HOWMET PRODUCTS UK LIMITED | 01927599 | 14/09/2001 | 31/08/2020 | Gold |
| KAWNEER U.K. LIMITED | 02917765 | 01/03/2014 | 01/02/2020 | Bronze |
| LGL 1996 LIMITED | 03034136 | 31/10/2000 | 27/03/2001 | Dissolved |
| LINREAD LIMITED | 00207655 | 09/03/2011 | 31/08/2020 | Gold |
| PFF PACKAGING (SEDGEFIELD) LIMITED | 02548722 | 01/02/2008 | 29/02/2008 | Gold |
| REYNOLDS SUBCO (UK) LIMITED | 03322218 | 01/02/2008 | 29/02/2008 | Dissolved |