| Company | Timeline | Status | |
| Defence Optical Systems Holdings Limited Secretary • Unreported | 8 Mar 2004←14 Years→1 Dec 2018 | Dissolved | |
| Defence Optical Limited Secretary • Unreported | 5 Mar 2004←14 Years→1 Dec 2018 | Active | |
| D O Systems Mission Support Ltd Secretary • Unreported | 5 Mar 2004←14 Years→1 Dec 2018 | Dissolved | |
