| Company | Timeline | Status | |
| Ultravalve Limited Director • Director | 1 Oct 1992←33 Years→Current | Active | |
| Ultravalve Limited Secretary • Unreported | 1 Oct 1992←24 Years→1 Oct 2016 | Active | |
| R.P.Z. Valves Limited Director • Director | 30 Jul 1991←31 Years→25 Apr 2023 | Dissolved | |
| R.P.Z. Valves Limited Secretary • Unreported | 30 Jul 1991←13 Years→31 May 2005 | Dissolved | |
