| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Filtronic Cable Communications Ltd | 03183533 | 02/04/2004 | Dissolved |
| Filtronic Executive Share Option Trustees Ltd | 01845899 | 02/04/2004 | Dissolved |
| Filtronic Microtek Ltd | 03398100 | 02/04/2004 | Dissolved |
| Filtronic Quest Trustees Ltd | 03134295 | 02/04/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FILTRONIC BROADBAND LIMITED | 03398105 | 02/04/2004 | 01/06/2022 | Silver |
| FILTRONIC COMTEK (UK) LIMITED | 02700306 | 02/04/2004 | 12/01/2010 | Dissolved |
| FILTRONIC PLC | 02891064 | 02/04/2004 | 01/06/2022 | Gold |
| POWERWAVE OVERSEAS HOLDINGS LIMITED | 05298744 | 31/01/2005 | 15/10/2006 | Dissolved |
| PULSE LK | 03042647 | 02/04/2004 | 08/09/2005 | Dissolved |
| RFMD (UK) LIMITED | 02927965 | 02/04/2004 | 29/02/2008 | Dissolved |
| TELEDYNE DEFENCE LIMITED | 01659830 | 02/04/2004 | 15/08/2008 | Dissolved |
| TELEDYNE PROPERTIES LIMITED | 03183532 | 02/04/2004 | 15/08/2008 | Dissolved |
| THE WHITE ROSE TECHNOLOGY SEEDCORN FUND | 03959536 | 24/03/2000 | 10/07/2001 | Dissolved |
| UNIVERSITY OF LEEDS INNOVATIONS LIMITED | 01002075 | 27/09/2000 | 11/04/2002 | Dissolved |
| WHITE ROSE TECHNOLOGY LIMITED | 03785280 | 24/02/2000 | 27/07/2000 | Dissolved |