| Company | Timeline | Status | |
| Calcium Design Ltd Secretary • Company Secretary | 2 Jun 2003←22 Years→Current | Active | |
Calcium Communications Ltd Secretary • Company Secretary | 2 Jun 2003←12 Years→22 Sep 2015 | Dissolved | |
| Calcium Creative Ltd Secretary • Company Secretary | 2 Jun 2003←22 Years→Current | Active | |
