| Company | Timeline | Status | |
| Oliver Twinsafe Valves Limited Secretary • Unreported | 15 Jun 2002←23 Years→Current | Active | |
| Oliver Valvetek Limited Secretary • Unreported | 15 Jun 2002←23 Years→Current | Active | |
| Oliver Valves Limited Secretary • Unreported | 15 Jun 2002←23 Years→Current | Active | |
| Transcabin Limited Secretary • Unreported | 17 Sep 1998←5 Years→31 Aug 2004 | Liquidation | |
