| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ABACO SYSTEMS LIMITED | 02151516 | 28/04/2021 | Silver |
| ABACO UK HOLDCO LIMITED | 10500391 | 28/04/2021 | One Red Flag |
| AMETEK (GB) LIMITED | 02569386 | 25/04/2018 | Silver |
| AMETEK AEROSPACE AND DEFENSE GROUP UK LIMITED | 08330514 | 26/04/2018 | Bronze |
| AMETEK EUROPEAN HOLDINGS LIMITED | 07397586 | 25/04/2018 | Silver |
| AMETEK INSTRUMENTS GROUP UK LIMITED | 08330531 | 26/04/2018 | Bronze |
| AMETEK SCP (BARROW) LIMITED | 05635616 | 25/04/2018 | Gold |
| EMA HOLDINGS UK LIMITED | 04600860 | 25/04/2018 | Dissolved |
| FOUNDATION TECHNOLOGY LIMITED | 02451086 | 28/04/2021 | Dissolved |
| FRAMEFLAIR LIMITED | 04998637 | 25/04/2018 | Gold |
| GATAN U.K. LIMITED | 11720789 | 29/10/2019 | Dissolved |
| MILMEGA LIMITED | 02185653 | 26/04/2018 | Gold |
| NSI-MI UK LIMITED | 05720810 | 28/04/2021 | Dissolved |
| POWERVAR LIMITED | 03407619 | 26/04/2018 | Dissolved |
| Solartron Metrology (1994) Ltd | 02853875 | 26/09/2005 | Dissolved |
| TAYLOR HOBSON LIMITED | 03230332 | 10/11/1999 | Silver |
| TUBES HOLDCO LIMITED | 08087520 | 25/04/2018 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FINE TUBES LIMITED | 00381159 | 25/04/2018 | 15/10/2018 | Gold |
| SOLARTRON METROLOGY 2001 LIMITED | 02858374 | 26/09/2005 | 15/08/2012 | Dissolved |
| TAYLOR HOBSON HOLDINGS LIMITED | 03230257 | 05/11/1999 | 04/01/2013 | Dissolved |
| TAYLOR HOBSON OVERSEAS LIMITED | 03230303 | 10/11/1999 | 04/01/2013 | Dissolved |