| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CONCURRENT TECHNOLOGIES PLC | 01919979 | 27/09/2021 | Gold |
| FILTRONIC BROADBAND LIMITED | 03398105 | 13/05/2024 | Silver |
| FILTRONIC HOLDINGS UK LIMITED | 05920312 | 13/05/2024 | Silver |
| FILTRONIC PLC | 02891064 | 13/05/2024 | Gold |
| FILTRONIC WIRELESS LTD | 01360332 | 13/05/2024 | One Red Flag |
| ISOTEK (HOLDINGS) LIMITED | 03398090 | 13/05/2024 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CERES HOLOGRAPHICS LIMITED | SC330746 | 01/05/2021 | 07/11/2024 | Amber |
| UNIPHY LIMITED | 10003458 | 01/10/2017 | 05/04/2018 | Amber |