| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| COLUMBIA ENTERPRISES LIMITED | NI602579 | 29/06/2018 | One Red Flag |
| Glenthorpe Trading Ltd | NI041098 | 03/08/2001 | Dissolved |
| JTS MANUFACTURING LTD | NI063439 | 26/03/2010 | Dissolved |
| ORCHARD COUNTY INVESTMENTS LTD | NI033823 | 13/03/1998 | Bronze |
| SPENCE BRYSON LIMITED | NI042468 | 19/02/2019 | Silver |
| THOMPSON AEROSPACE LIMITED | NI068352 | 26/03/2010 | Dissolved |
| TRACEASSURED LIMITED | NI039770 | 05/12/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 202 BLACKSTOCK ROAD MANAGEMENT COMPANY LIMITED | 05344611 | 16/03/2011 | 16/03/2011 | Silver |
| ADVANCED SENSORS LIMITED | NI053892 | 01/07/2005 | 04/10/2013 | Silver |
| ATLAS TANKS LTD | NI040526 | 01/05/2003 | 17/10/2007 | Dissolved |
| DEVON AND SOMERSET ENGINEERING COMPANY LIMITED | 01844814 | 10/07/2007 | 17/10/2007 | Dissolved |
| INNOVATION ULSTER LIMITED | NI033135 | 20/08/2013 | 13/03/2017 | Silver |
| INTERFACE DEVICES LTD | 01825474 | 22/05/1998 | 02/04/1999 | Bronze |
| MIVAN GROUP HOLDING LIMITED | NI014829 | 25/03/1981 | 31/03/2000 | Dissolved |
| NOTTARB LIMITED | 02654204 | 10/07/2007 | 17/10/2007 | Dissolved |
| SENSOR SYSTEMS WATCHMAN | NI020631 | 26/06/1987 | 29/06/2006 | Dissolved |
| SENTEL INDEPENDENT LIMITED | NI032991 | 25/09/1997 | 20/12/2005 | Bronze |
| Sensor Services Ltd | NI039266 | 25/09/2000 | 29/06/2006 | Dissolved |
| Sensor Systems (Signalman) Ltd | NI031744 | 03/12/2004 | 29/06/2006 | Dissolved |
| THOMPSON AERO SEATING LIMITED | NI032654 | 16/02/2009 | 05/12/2016 | Amber |