| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 4SITE TELECOMS UK LTD | 08627828 | 13/12/2019 | 30/04/2024 | Silver |
| BELLCOM UK LIMITED | 05459035 | 29/09/2017 | 30/04/2024 | Silver |
| HUTCHISON COMMUNICATION SYSTEMS LIMITED | 03462357 | 11/07/2016 | 30/04/2024 | Not Trading |
| INDIGO GROUP HOLDINGS LIMITED | 10072338 | 18/03/2016 | 30/04/2024 | Bronze |
| INDIGO TELECOM GROUP LIMITED | 03675459 | 22/08/2014 | 30/04/2024 | One Red Flag |
| INDIGO TELECOM INSTALLATION SERVICES LIMITED | 04200834 | 11/07/2016 | 30/04/2024 | Not Trading |
| SION BIDCO LIMITED | 11680047 | 30/11/2018 | 30/04/2024 | One Red Flag |
| SION MIDCO LIMITED | 11680008 | 30/11/2018 | 30/04/2024 | Bronze |
| SION TOPCO LIMITED | 11679768 | 30/11/2018 | 30/04/2024 | Amber |