| TexAir System Limited | | Live |
| THEMOEDGE SYSTEM LIMITED | Private company limited by shares | Live |
| TIANKONG SYSTEM LIMITED | Private company limited by shares | Live |
| TICTAS SYSTEM AUTOMATION LIMITED | Private company limited by shares | Live |
| TIME SYSTEM LIMITED | Private company limited by shares | Dissolved |
| TIMES SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG TONGDA NETWORK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| TRADE AIR SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM TRADE LIMITED | Private company limited by shares | Dissolved |
| TRANSPORT SYSTEM LIMITED | Private company limited by shares | Live |
| EUROPEAN TRANSPORT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| EUROSTAR TRANSPORT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Transport System Solutions Limited | Private company limited by shares | Live |
| TRIBUTA SYSTEM LIMITED | Private company limited by shares | Live |
| TUBI P&D SYSTEM LIMITED | Private company limited by shares | Dissolved |
| TUEXE SYSTEM LIMITED | | Live |
| ULTRANET SYSTEM LIMITED | Private company limited by shares | Live |
| UltraTec System Limited | Private company limited by shares | Live |
| ULTRATEK SYSTEM LIMITED | Private company limited by shares | Live |
| UNIBEAN SYSTEM LIMITED | Private company limited by shares | Dissolved |
| UNICORN SYSTEM LIMITED | Private company limited by shares | Live |
| UNIFORCE SYSTEM LIMITED | Private company limited by shares | Live |
| VAST SYSTEM LIMITED | Private company limited by shares | Dissolved |
| VEBER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| VICTOR SYSTEM LIMITED | Private company limited by shares | Live |
| China Audio & Video System Technology Association Limited | Private company limited by shares | Live |
| New Vision System Limited | Private company limited by shares | Live |
| VISION IT SYSTEM LIMITED | | Live |
| VOXUS SYSTEM (ASIA) LIMITED | Private company limited by shares | Dissolved |
| VPLUS SYSTEM LIMITED | Private company limited by shares | Live |
| Wasonic System Limited | Private company limited by shares | Dissolved |
| Wasonic System Limited | Private company limited by shares | Live |
| BURGEON WASTE SORTING SYSTEM LIMITED | Private company limited by shares | Live |
| WEALTHY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| WEALTHY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| WEALTHY SYSTEM LIMITED | Private company limited by shares | Live |
| WEILING SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Optimistic Whitening Legend System Company Limited | Private company limited by shares | Live |
| Hotwire Payment System World Limited | Private company limited by shares | Dissolved |
| Wuguang System Company Limited | Private company limited by shares | Live |
| YOUNG FURNITURE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ZENITH SYSTEM LIMITED | Private company limited by shares | Live |
| ZITEX SYSTEM LIMITED | Private company limited by shares | Live |
| System3 Solution Limited | Private company limited by shares | Live |
| SYSTEM4U LIMITED | Private company limited by shares | Dissolved |
| Systemair Tech Co., Limited | | Live |
| SYSTEMAIR (HK) LIMITED | Private company limited by shares | Live |
| SYSTEMAR LIMITED | | Live |
| SYSTEMART LIMITED | Private company limited by shares | Dissolved |
| SYSTEMATIC LIMITED | Private company limited by shares | Dissolved |
| I. T. SYSTEMATIC LIMITED | Private company limited by shares | Dissolved |
| Unicorn Service Systematic Limited | Private company limited by shares | Dissolved |
| SystematicEdge Limited | Private company limited by shares | Live |
| M AND M SYSTEMATICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSTEMATICS ASIA LIMITED | Private company limited by shares | Dissolved |
| SYSTEMATION LIMITED | Private company limited by shares | Dissolved |
| China Housing Systematization Technology Institute Research Co., Limited | Private company limited by shares | Live |
| SYSTEMAX LIMITED | Private company limited by shares | Dissolved |
| SYSTEMAX DESIGN & CONTRACTING LIMITED | Private company limited by shares | Live |
| SYSTEMAX MARKETING LIMITED | Private company limited by shares | Dissolved |
| SYSTEMBOARD LIMITED | Private company limited by shares | Dissolved |
| SYSTEMCARD ASIA LIMITED | Private company limited by shares | Dissolved |
| SYSTEM-COM LIMITED | Private company limited by shares | Dissolved |
| NPC SYSTEM.COM LIMITED | Private company limited by shares | Dissolved |
| SYSTEMDEK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Hopscotch Systeme Asia Limited | Private company limited by shares | Live |
| SYNTHESIS SYSTEMES LIMITED | Private company limited by shares | Dissolved |
| SYSTEMGRAFX LIMITED | Private company limited by shares | Dissolved |
| SYSTEMHOUSE LIMITED | Private company limited by shares | Dissolved |
| SYSTEMIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSTEMIC TRADING LIMITED | | Live |
| Systemize Technology Limited | Private company limited by shares | Dissolved |
| SYSTEMLINE LIMITED | Private company limited by shares | Dissolved |
| SYSTEMLINK LIMITED | Private company limited by shares | Live |
| SYSTEMLINK HK LIMITED | Private company limited by shares | Live |
| SYSTEMLUX LIMITED | Private company limited by shares | Live |
| Systemo Limited | Private company limited by shares | Live |
| SYSTEMONE LIMITED | Private company limited by shares | Live |
| SystemOne Limited | | Live |
| SYSTEM-ONE COMPUTER COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSTEM-ONE COMPUTER TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SYSTEMONE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| SYSTEMPARTS HARDWARE CORPORATION LIMITED | Private company limited by shares | Live |
| SYSTEMPORT LIMITED | Private company limited by shares | Dissolved |
| SYSTEMPOWER (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SYSTEMPRESS LIMITED | Private company limited by shares | Dissolved |
| System-Pro Limited | Private company limited by shares | Live |
| SYSTEM-PRO INVESTMENT LIMITED | Private company limited by shares | Live |
| SYSTEM-PRO SOLUTIONS LIMITED | Private company limited by shares | Live |
| SYSTEM-R LIMITED | Private company limited by shares | Dissolved |
| RDM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| CTS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HWA YIK SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| DSP SYSTEMS LIMITED | Private company limited by shares | Live |
| CPU SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HPT SYSTEMS LIMITED | Private company limited by shares | Live |
| CIM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| L & M SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| G & S SYSTEMS LIMITED | Private company limited by shares | Dissolved |