| Hi-tech Resources & Systems Limited | Private company limited by shares | Dissolved |
| RICHCOMTECH SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| RICHTECH SYSTEMS LIMITED | Private company limited by shares | Live |
| Ricom Systems Co. Limited | Private company limited by shares | Live |
| Red Road Systems Limited | | Live |
| ROCTEC SYSTEMS LIMITED | Private company limited by shares | Live |
| ROKET SYSTEMS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ROLLESTONE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| RTEC SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SATO SYSTEMS LIMITED | Private company limited by shares | Live |
| Air Seat Systems Limited | Private company limited by shares | Live |
| SYSTEMS COMPANY SECRETARIES LIMITED | Private company limited by shares | Live Commenced dormancy on 28-Jul-2016 |
| SEDNA SYSTEMS LIMITED | Private company limited by shares | Live |
| SelfTAP Pro Systems Limited | Private company limited by shares | Live |
| SERVICE SYSTEMS COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| DSP SYSTEMS SERVICE LIMITED | Private company limited by shares | Live |
| DC Systems Service Co. Limited | | Live |
| SERVO SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Sheppard Asia Steering Systems Limited | Private company limited by shares | Live |
| SIGNAGE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NEW SIGNAGE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SIGNS & SYSTEMS LIMITED | Private company limited by shares | Live |
| SILO SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SILOBAGS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SINOVIEW SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SKALI SYSTEMS LIMITED | Private company limited by shares | Live |
| SKYNET SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SLIDEHIDE Systems Limited | | Live |
| Smart Systems Limited | Private company limited by shares | Live |
| SMART ENTERPRISE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SMARTLINK SYSTEMS LIMITED | Private company limited by shares | Live |
| SMERP SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SOFTCUBE SYSTEMS LIMITED | Private company limited by shares | Live |
| SYSTEMS SOFTWARE LIMITED | Private company limited by shares | Dissolved |
| SOLAR SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SOLAR SYSTEMS LIMITED -THE- | Private company limited by shares | Live |
| Comtec Solar Systems HK Limited | Private company limited by shares | Live |
| Solar Systems Investments Limited | Private company limited by shares | Live |
| SOLIBRAINS SYSTEMS LIMITED | Private company limited by shares | Live |
| SPLINEWARE GRAPHICS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| STABLE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| STANDARD SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SUCCESS SYSTEMS LIMITED | Private company limited by shares | Live |
| SUHHYUN SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| SUNBIO SYSTEMS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUNLIGHT SYSTEMS LIMITED | Private company limited by shares | Live |
| SUNLIGHT SYSTEMS LIMITED | Private company limited by shares | Live |
| SUNRISE IT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SUNRISE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SUREN SYSTEMS LIMITED | Private company limited by shares | Live |
| Suresoft Systems Limited | Private company limited by shares | Dissolved |
| SWOT SYSTEMS LIMITED | Private company limited by shares | Live |
| SYNC-COM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| T.A. SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TALENTECH SYSTEMS LIMITED | Private company limited by shares | Live |
| TECHNICA SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TECHNICOM SYSTEMS LIMITED | Private company limited by shares | Live |
| DSK TECHNOLOGICAL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TECHTRONIC SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TECHTRONIC SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| TEKLOGICA SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TELEMATICS SYSTEMS LIMITED | Private company limited by shares | Live |
| TELO SYSTEMS LIMITED | Private company limited by shares | Live |
| One Thor Systems Company Limited | Private company limited by shares | Live |
| TianDi Systems Company Limited | Private company limited by shares | Dissolved |
| TIANLONG SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TIOS SYSTEMS LIMITED | Private company limited by shares | Live |
| TLINE SYSTEMS LIMITED | Private company limited by shares | Live |
| TONTER SYSTEMS LIMITED | Private company limited by shares | Live |
| TOPMIND SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| BIZ TRAC SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRADE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| QHC Systems Trade Limited | | Live |
| TRANSCENDENTAL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRANSLINK SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HOP ON FAT TRANSPORT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| CNT TRANSPORT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRANS-PORT SYSTEMS LIMITED | Private company limited by shares | Live |
| PENFIELD LIQUID TREATMENT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRENDLY SYSTEMS LIMITED | Private company limited by shares | Live |
| TRICAM SYSTEMS LIMITED | Private company limited by shares | Live |
| TRICONEX SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRINITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRINITY CARPET SYSTEMS LIMITED | Private company limited by shares | Live |
| TRIPLE R SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRUSTED SYSTEMS LIMITED | Private company limited by shares | Live |
| TXTC SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Tyneham Systems Limited | Private company limited by shares | Live |
| uLab Systems Asia Limited | Private company limited by shares | Live |
| ULTRAFLEX SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| ULTRAFLEX SYSTEMS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNITEX SYSTEMS LIMITED | Private company limited by shares | Live |
| UNI-WORLD SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| UPLEX SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Utiliti Systems Limited | Private company limited by shares | Live |
| VAAB SYSTEMS LIMITED | Private company limited by shares | Live |
| VACUUM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NET VEIN SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| VENTRONICS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Versatech Systems Limited | Private company limited by shares | Live |