| Company | Timeline | Status | |
| DMS Custom Install Ltd Secretary • Secretary | 1 Feb 2007←6 Years→1 Oct 2013 | Liquidation | |
| Decibel Systems Ltd Secretary • Secretary | 1 Feb 2007←6 Years→1 Oct 2013 | Active | |
| DMS Support Ltd Secretary • Secretary | 1 Feb 2007←6 Years→1 Oct 2013 | Dissolved | |
| Decibel Managed Systems Ltd Secretary • Unreported | 15 May 2006←6 Years→2 Jan 2013 | Dissolved | |
