| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BLU WIRELESS TECHNOLOGY (EBT) LIMITED | 10948757 | 10/09/2019 | Not Trading |
| BLU WIRELESS TECHNOLOGY LIMITED | 06855929 | 19/12/2018 | Amber |
| CALCULUS VCT PLC | 07142153 | 22/02/2024 | Silver |
| Filtronic Cable Communications Ltd | 03183533 | 02/11/2007 | Dissolved |
| Filtronic Executive Share Option Trustees Ltd | 01845899 | 02/11/2007 | Dissolved |
| Filtronic Microtek Ltd | 03398100 | 02/11/2007 | Dissolved |
| Filtronic Quest Trustees Ltd | 03134295 | 02/11/2007 | Dissolved |
| HEADLIGHT TECHNOLOGY PARTNERS LIMITED | 14223353 | 08/07/2022 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FILTRONIC BROADBAND LIMITED | 03398105 | 02/11/2007 | 21/09/2012 | Silver |
| FILTRONIC COMTEK (UK) LIMITED | 02700306 | 02/11/2007 | 12/01/2010 | Dissolved |
| FILTRONIC HOLDINGS UK LIMITED | 05920312 | 02/11/2007 | 21/09/2012 | Silver |
| FILTRONIC WIRELESS LTD | 01360332 | 16/11/2010 | 21/09/2012 | One Red Flag |
| Filtronic Cable Communications Ltd | 03183533 | 01/06/1996 | 28/05/2004 | Dissolved |
| IDEX BIOMETRICS UK LTD | 09193617 | 29/08/2014 | 01/04/2018 | Amber |
| ISOTEK (HOLDINGS) LIMITED | 03398090 | 16/11/2010 | 21/09/2012 | Bronze |
| ISOTEK LIMITED | 02919177 | 16/11/2010 | 21/09/2012 | Dissolved |
| RFMD (UK) LIMITED | 02927965 | 02/11/2007 | 29/02/2008 | Dissolved |
| RUDDING DOWER MANAGEMENT LIMITED | 01150498 | 01/03/2010 | 04/04/2016 | Silver |
| TELEDYNE PROPERTIES LIMITED | 03183532 | 02/11/2007 | 15/08/2008 | Dissolved |