| Company | Timeline | Status | |
| Special Steels Limited Secretary • Unreported | 12 May 1995←10 Years→18 Dec 2005 | Active | |
| Special Quality Alloys Limited Secretary • Unreported | 30 Oct 1992←13 Years→18 Dec 2005 | Active | |
| Sheffield Special Steels Limited Secretary • Unreported | 12 Dec 1991←14 Years→18 Dec 2005 | Active | |
| Special Testing Limited Secretary • Unreported | 30 Oct 1991←14 Years→18 Dec 2005 | Active | |
| Special Steel Co.,Limited Secretary • Unreported | 30 Oct 1991←3 Years→1 Jun 1995 | Active | |
| S.T.W. (Non-Destructive) Limited Secretary • Unreported | 17 Dec 1990←15 Years→18 Dec 2005 | Active | |
