| I-UNITED SYSTEM INTEGRATION SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| SPECTRUM SYSTEM INTEGRATION LIMITED | Private company limited by shares | Dissolved |
| SYNJONES SYSTEM INTEGRATION COMPANY (HK) LIMITED | Private company limited by shares | Dissolved |
| INTEGRATION SYSTEMS LIMITED | Private company limited by shares | Live |
| TAU INTEGRATION SYSTEMS LIMITED | Private company limited by shares | Live |
| INNOVATIVE SYSTEMS INTEGRATION LIMITED | Private company limited by shares | Live |
| Fort Power and Systems Integration Limited | Private company limited by shares | Live |
| Teclink Integration Limited | Private company limited by shares | Live |
| SMART KEY INTEGRATIONS LIMITED | Private company limited by shares | Live |
| INTEGRATIVE LIMITED | Private company limited by shares | Live |
| WAN YAN INTEGRATIVE COUNSELLING CENTRE LIMITED | Private company limited by shares | Live |
| BOB Integrato Consulente Impresa Co., Limited | Private company limited by shares | Live |
| INTEGRATOR COMPANY LIMITED | Private company limited by shares | Live |
| ACE INTEGRATOR LIMITED | | Live |
| AllTech Integrator Limited | Private company limited by shares | Live |
| INTEGRATOR (ASIA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| GLOBAL TECHNOLOGY INTEGRATOR LIMITED | Private company limited by shares | Live |
| Hong Kong System Integrator Limited | Private company limited by shares | Live |
| OPTICAL SYSTEM INTEGRATOR LIMITED | Private company limited by shares | Live |
| FRONTIER SYSTEMS INTEGRATOR LIMITED | Private company limited by shares | Live |
| Info-Tech Systems Integrators (HK) Limited | Private company limited by shares | Live |
| MERIDIAN INTEGRATORS (HK) LIMITED | Private company limited by shares | Dissolved |
| SYSTEM INTEGRATORS LIMITED | Private company limited by shares | Dissolved |
| PACIFIC SYSTEM INTEGRATORS LIMITED | Private company limited by shares | Dissolved |
| SMART SYSTEM INTEGRATORS LIMITED | Private company limited by shares | Live |
| SYSTEMS INTEGRATORS LIMITED | Private company limited by shares | Live |
| SYSTEMS INTEGRATORS (ASIA) LIMITED | Private company limited by shares | Live |
| VISUAL SYSTEM INTEGRATORS LIMITED | Private company limited by shares | Dissolved |