| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CLARKE & HARVEY LTD | 09417276 | 02/02/2015 | Dissolved |
| MEL AVIATION COMPONENTS LIMITED | 08488525 | 10/03/2014 | Silver |
| TRENT AERO ENGINEERING LIMITED | 01420006 | 10/03/2014 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARROWSMITH ENGINEERING AND CONSULTANTS LIMITED | 01555389 | 10/03/2014 | 18/06/2024 | Bronze |
| C.RAYMENT(PRECISION ENGINEERING)LIMITED | 00813866 | 28/09/2018 | 18/06/2024 | Strike Off |
| CLEMENT CLARKE COMMUNICATIONS LIMITED | 09377876 | 07/01/2015 | 18/06/2024 | Bronze |
| DIDSBURY ENGINEERING CO.LIMITED | 00371191 | 04/07/2016 | 03/03/2023 | Silver |
| E.D.S. ENGINEERING LIMITED | 02142541 | 14/02/2018 | 18/06/2024 | Bronze |
| H.B.S. ELECTRONICS LIMITED | 05089025 | 10/03/2014 | 18/06/2024 | Silver |
| HBS ELECTRONICS (HOLDINGS) LIMITED | 08780150 | 10/03/2014 | 31/05/2023 | Bronze |
| HBSEH VENTURES LIMITED | 04783710 | 04/07/2016 | 18/06/2024 | Dissolved |
| HEADSET SERVICES LTD. | 02962104 | 10/03/2014 | 18/06/2024 | Gold |
| LAURENCE WALTER LIMITED | 05777178 | 10/03/2014 | 18/06/2024 | Silver |
| LINTON PLASTIC MOULDERS LIMITED | 01505843 | 01/07/2014 | 18/06/2024 | Bronze |
| MEL AVIATION LIMITED | 00939400 | 10/03/2014 | 18/06/2023 | Gold |
| OLDBURY ENGINEERING CO.,LIMITED | 00414684 | 19/05/2017 | 18/06/2024 | Gold |
| REDMAYNE ENGINEERING LIMITED | 00745097 | 01/09/2017 | 18/06/2024 | Silver |
| REDMAYNE HGS LIMITED | 06523205 | 01/09/2017 | 18/06/2024 | Gold |
| SENSORCOM LIMITED | 03991038 | 01/09/2015 | 18/06/2024 | Bronze |
| SMA PLASTICS LIMITED | 13435270 | 02/06/2021 | 18/06/2024 | One Red Flag |