| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SAMAERO LTD | 13104839 | 30/12/2020 | Not Trading |
| TV4ME Ltd | 03403196 | 14/07/1997 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| C & H PRECISION FINISHERS LIMITED | 02905047 | 22/09/2006 | 01/07/2020 | Silver |
| COMPOSITE PRODUCTS LIMITED | 07935728 | 10/02/2012 | 27/05/2016 | One Red Flag |
| HARTSHILL VENTURES LIMITED | 05783108 | 04/03/2016 | 15/10/2020 | Dissolved |
| MIDLANDS AEROSPACE ALLIANCE | 05357793 | 21/09/2005 | 22/09/2011 | Gold |
| SIGMA COMPONENTS (DERBY) LIMITED | 02751564 | 23/11/2012 | 01/07/2020 | Dissolved |
| SIGMA COMPONENTS (FARNBOROUGH) LIMITED | 06268374 | 08/06/2007 | 01/07/2020 | Amber |
| SIGMA COMPONENTS HOLDINGS LIMITED | 10010945 | 27/05/2016 | 30/06/2021 | Amber |
| SIGMA COMPONENTS LIMITED | 10145670 | 27/05/2016 | 01/07/2020 | Bronze |
| SIGMA COMPONENTS MIDCO 1 LIMITED | 10145833 | 27/05/2016 | 01/07/2020 | Silver |
| SIGMA COMPONENTS MIDCO 2 LIMITED | 10145829 | 27/05/2016 | 01/07/2020 | Silver |
| SIGMA PRECISION COMPONENTS LIMITED | 05321609 | 29/12/2004 | 15/10/2020 | One Red Flag |
| SIGMA PRECISION COMPONENTS UK LIMITED | 00781039 | 02/10/2006 | 01/07/2020 | Silver |
| SKYFLY TECHNOLOGIES LIMITED | 08742819 | 23/05/2022 | 06/10/2022 | Amber |
| Wadkin Ltd | 00298967 | 01/04/1998 | 26/03/1999 | Dissolved |