| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ACOUSTICS HOLDCO LIMITED | 05018863 | 26/01/2009 | Dissolved |
| INSUMAT LIMITED | 00880336 | 16/12/2005 | Dissolved |
| NORWICH AERO PRODUCTS LIMITED | 02858312 | 11/06/2003 | Dissolved |
| RACAL ACOUSTICS GLOBAL LIMITED | 05478848 | 26/01/2009 | Dissolved |
| RACAL ACOUSTICS GROUP LIMITED | 05479016 | 26/01/2009 | Dissolved |
| RACAL ACOUSTICS HOLDINGS LIMITED | 05478873 | 26/01/2009 | Dissolved |
| RAG NEWCO LIMITED | 06747679 | 26/01/2009 | Dissolved |
| UKCI LIMITED | 05018869 | 26/01/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DARCHEM ENGINEERING LIMITED | SC144767 | 16/12/2005 | 01/03/2018 | Gold |
| DARCHEM HOLDINGS LIMITED | 03966333 | 16/12/2005 | 01/03/2018 | Silver |
| EST DEFENCE COMPANY UK LIMITED | 00675623 | 24/03/2006 | 01/03/2018 | Not Trading |
| ESTERLINE ACQUISITION LIMITED | 05720105 | 23/02/2006 | 01/03/2018 | One Red Flag |
| ESTERLINE TECHNOLOGIES ACQUISITION LIMITED | 04759585 | 19/06/2003 | 01/03/2018 | Dissolved |
| ESTERLINE TECHNOLOGIES HOLDINGS LIMITED | 05148070 | 30/06/2004 | 01/03/2018 | Amber |
| ESTERLINE TECHNOLOGIES UNLIMITED | 03837209 | 11/10/1999 | 01/03/2018 | Gold |
| LEACH INTERNATIONAL UK LIMITED | 01026277 | 10/12/2004 | 01/03/2018 | Silver |
| PRESSURE SYSTEMS INTERNATIONAL LIMITED | 02858303 | 11/06/2003 | 01/03/2018 | Bronze |
| RACAL ACOUSTICS LIMITED | 05019038 | 26/01/2009 | 01/03/2018 | Gold |
| TA MFG LIMITED | 01979171 | 01/07/1999 | 01/03/2018 | Silver |
| WALLOP DEFENCE UK LIMITED | 00410988 | 24/03/2006 | 01/03/2018 | Not Trading |
| WESTON AERO 2003 | 03817397 | 11/06/2003 | 01/03/2018 | Dissolved |
| WESTON AEROSPACE LIMITED | 04740406 | 11/06/2003 | 01/03/2018 | Gold |