| S.I.L.T. LIMITED | Private company limited by shares | Dissolved |
| SILTA INVESTMENTS LIMITED | Private company limited by shares | Live |
| SILTACT LIMITED | Private company limited by shares | Dissolved |
| SILTECK LIMITED | Private company limited by shares | Live |
| SILTER INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SILTEX COMPANY LIMITED | Private company limited by shares | Dissolved |
| SILTEX INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SILTOP LIMITED | Private company limited by shares | Dissolved |
| SILTRAN LIMITED | Private company limited by shares | Live |
| Siltron Technology Limited | Private company limited by shares | Live |