| B & J System Limited | Private company limited by shares | Live |
| ALL ONE SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| CT SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| MY SYSTEM ET LIMITED | Private company limited by shares | Live |
| Noa System. Co. Limited | Private company limited by shares | Live |
| AG System Limited | Private company limited by shares | Live |
| PI SYSTEM LIMITED | Private company limited by shares | Live |
| 3A SYSTEM LIMITED | Private company limited by shares | Live |
| GT SYSTEM LIMITED | Private company limited by shares | Live |
| KEM SYSTEM LIMITED | Private company limited by shares | Live |
| ABK System Limited | Private company limited by shares | Live |
| VBS SYSTEM LIMITED | Private company limited by shares | Live |
| MRD System Limited | Private company limited by shares | Live |
| ALL WIN SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| MY SYSTEM LIMITED | Private company limited by shares | Live |
| AFO SYSTEM LIMITED | Private company limited by shares | Live |
| J System Limited | Private company limited by shares | Live |
| Ace system Limited | Private company limited by shares | Live |
| JC System Limited | Private company limited by shares | Live |
| ACT SYSTEM LIMITED | Private company limited by shares | Live |
| A&Y System Co. Limited | Private company limited by shares | Live |
| Zen System Limited | Private company limited by shares | Live |
| NEW SYSTEM LIMITED | Private company limited by shares | Live |
| MY SYSTEM HK LIMITED | Private company limited by shares | Live |
| PGM System Limited | Private company limited by shares | Live |
| 3D PDF System Limited | Private company limited by shares | Live |
| P&T System Company Limited | Private company limited by shares | Live |
| CNR SYSTEM LIMITED | Private company limited by shares | Live |
| SUN WAY SYSTEM LIMITED | Private company limited by shares | Live |
| C & S System Limited | Private company limited by shares | Live |
| LK SYSTEM HK LIMITED | Private company limited by shares | Live |
| EMC SYSTEM LIMITED | Private company limited by shares | Live |
| CCB System Limited | Private company limited by shares | Live |
| ART SYSTEM LIMITED | Private company limited by shares | Live |
| MAR SYSTEM LIMITED | Private company limited by shares | Live |
| I3 System Limited | Private company limited by shares | Live |
| UAV SYSTEM LIMITED | Private company limited by shares | Live |
| ATK System Limited | Private company limited by shares | Live |
| CET SYSTEM LIMITED | Private company limited by shares | Live |
| AGL SYSTEM LIMITED | Private company limited by shares | Live |
| AFI System Limited | Private company limited by shares | Live |
| PRO ONE SYSTEM LIMITED | Private company limited by shares | Live |
| RWA SYSTEM LIMITED | Private company limited by shares | Live |
| Hi5 System Limited | Private company limited by shares | Live |
| SRA System Limited | Private company limited by shares | Live |
| ELD SYSTEM LIMITED | Private company limited by shares | Live |
| 101 SYSTEM LIMITED | Private company limited by shares | Live |
| JK System Limited | Private company limited by shares | Live |
| Y&Y SYSTEM LIMITED | | Live |
| PGM SYSTEM LIMITED | | Live |
| Hon Lam System Limited | | Live |
| ERA SYSTEM LIMITED | | Live |
| ACE SYSTEM LIMITED | | Live |
| SUN SYSTEM LIMITED | | Live |
| HTD SYSTEM LIMITED | | Live |
| 121 System Limited | | Live |
| iEx System Limited | | Live |
| Sun Tak System Limited | | Live |
| G3 System Limited | | Live |
| AC&T SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ADVANCED SYSTEM LIMITED | Private company limited by shares | Live |
| AEDUPAC SYSTEM LIMITED | Private company limited by shares | Live |
| AEMPAC SYSTEM LIMITED | Private company limited by shares | Dissolved |
| AFFIRM SYSTEM LIMITED | Private company limited by shares | Dissolved |
| REGAL WORLD TRANSPORT SYSTEM (SEA & AIR) LIMITED | Private company limited by shares | Dissolved |
| Alpha-Round System Limited | | Live |
| Altima System Limited | | Live |
| APAC System Limited | | Live |
| AquaPro Purification System Limited | Private company limited by shares | Live |
| ARCON SYSTEM LIMITED | Private company limited by shares | Live |
| AROMATECH SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ARON DIGITAL SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ARROW SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM ARTISAN LIMITED | Private company limited by shares | Live |
| SYSTEM ASIA LIMITED | Private company limited by shares | Live |
| ASIA SYSTEM LIMITED | Private company limited by shares | Live |
| NEW SYSTEM (ASIA) LIMITED | Private company limited by shares | Live |
| ASIA SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Live |
| ASIA INTERACTIVE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MITAC SYSTEM (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SYSTEM NETWORKS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| OPLANS SYSTEM ASIA LIMITED -THE- | Private company limited by shares | Live |
| ASIA PLASTIC SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ASIA TRADE SYSTEM LIMITED | Private company limited by shares | Live |
| ASIAN SOFTWARE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ASIATECH DIGITAL SYSTEM LIMITED | Private company limited by shares | Live |
| ASTRONET SYSTEM LIMITED | Private company limited by shares | Live |
| AUTO ELECTRIC DRIVE SYSTEM HK CO., LIMITED | | Live |
| XI AU TE AUTOMATION SYSTEM LIMITED | Private company limited by shares | Dissolved |
| AVENIR SYSTEM LIMITED | Private company limited by shares | Dissolved |
| AWARD SYSTEM RESEARCH LIMITED | Private company limited by shares | Dissolved |
| BARTER EXCHANGE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Basic System Limited | | Live |
| BEAUTY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| BEST SYSTEM LIMITED | Private company limited by shares | Dissolved |
| BEST SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM BEST LIMITED | Private company limited by shares | Dissolved |
| SYSTEM BEST LIMITED | Private company limited by shares | Live |
| BEST SYSTEM LIMITED | Private company limited by shares | Live |
| BEST SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |