| Company | Timeline | Status | |
| Ultravalve Limited Director • Director | 1 Oct 1992←33 Years→Current | Active | |
| R.P.Z. Valves Limited Director • Director | 30 Jul 1991←31 Years→25 Apr 2023 | Dissolved | |
| Ultravalve Limited Director • Unreported | 1 Jan 1970←56 Years→31 Dec 2025 | Active | |
