| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| EVENTAPP LIMITED | 09293075 | 03/11/2014 | Dissolved |
| GROUPAPP LIMITED | 09339573 | 03/12/2014 | Dissolved |
| HC 1241 LIMITED | 09293162 | 03/11/2014 | Dissolved |
| PLANET PARENT LIMITED | 07789672 | 28/09/2011 | Dissolved |
| SMI EVENT MANAGEMENT LIMITED | 09267284 | 16/10/2014 | Dissolved |
| SMI MILSATCOM LIMITED | 09265507 | 15/10/2014 | Dissolved |
| SMI TRAINING LIMITED | 09267746 | 16/10/2014 | Dissolved |
| Smi Information Services Ltd | 03727155 | 14/07/2005 | Dissolved |
| Smi Publishing Ltd | 03123616 | 14/07/2005 | Dissolved |
| Smi-Online Ltd | 04014229 | 14/07/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| SAE MEDIA GROUP LIMITED | 07154888 | 10/09/2010 | 01/02/2020 | Silver |
| SMI CONFERENCES LIMITED | 02883832 | 14/07/2005 | 01/02/2020 | Not Trading |
| SMI GROUP LIMITED | 03779287 | 20/06/2005 | 01/02/2020 | Bronze |