| GOLD SYSTEM LIMITED | Private company limited by shares | Live |
| GOLD SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GOLD SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Live |
| GOLD SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| GRAND SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| GRAND SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GRAND SYSTEM LIMITED | Private company limited by shares | Live |
| HANSUNG SYSTEM LIMITED | Private company limited by shares | Dissolved |
| HAPPY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| HAPPY SYSTEM LIMITED | Private company limited by shares | Live |
| HARBOUR SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM HILL LIMITED | Private company limited by shares | Dissolved |
| HI-TECH SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| MULTI-SOLUTION NETWORK & SYSTEM (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ULTIMATE DISPLAY SYSTEM (HK) LIMITED | Private company limited by shares | Dissolved |
| HKE-navigation system Limited | Private company limited by shares | Dissolved |
| LSM System Holding Limited | Private company limited by shares | Dissolved |
| SKY SYSTEM INVESTMENT HOLDING LIMITED | Private company limited by shares | Dissolved |
| HOLY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| HONEST SYSTEM LIMITED | Private company limited by shares | Live |
| HONG KONG AUTOWAY SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Cleaning System Limited | Private company limited by shares | Live |
| HONG KONG MICROELECTRONICS SYSTEM CO., LIMITED | Private company limited by shares | Live |
| HONG KONG PRECISION SYSTEM CO., LIMITED | Private company limited by shares | Live |
| HONG KONG SUNDY SYSTEM CO., LIMITED | Private company limited by shares | Live |
| HONG KONG HI-TECH AQUARIUM SYSTEM LIMITED | Private company limited by shares | Live |
| FUNCTIONAL MATRIX SYSTEM (HONG KONG) LIMITED | Private company limited by shares | Live |
| Perfection Aligner System Hong Kong Limited | Private company limited by shares | Live |
| HONG KONG PAGING SYSTEM, LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Rapid Transit System Limited | | Live |
| HONG KONG TONGBEI SYSTEM LIMITED | Private company limited by shares | Dissolved |
| HONG KONG TOTAL SECURITY SYSTEM CO. LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ALGO TRADING SYSTEM LIMITED | Private company limited by shares | Live |
| HORIZON SYSTEM LIMITED | Private company limited by shares | Live |
| HORNINGTON SYSTEM LIMITED | Private company limited by shares | Live |
| A & A HOTELS SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| HUMAN POS SYSTEM LIMITED | Private company limited by shares | Dissolved |
| OKONOFF HVAC SYSTEM LIMITED | Private company limited by shares | Live |
| HYPERTEC SYSTEM LIMITED | Private company limited by shares | Live |
| IBORNE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| IMPLEX SYSTEM LIMITED | Private company limited by shares | Live |
| Inclover System Company Limited | Private company limited by shares | Live |
| INCOME SYSTEM LIMITED | Private company limited by shares | Dissolved |
| InfoBear System Limited | | Live |
| INFOMATIC SYSTEM LIMITED | Private company limited by shares | Dissolved |
| INKJET SYSTEM LIMITED | Private company limited by shares | Live |
| INNOVATOR SYSTEM LIMITED | Private company limited by shares | Dissolved |
| IN-PRO SYSTEM LIMITED | Private company limited by shares | Dissolved |
| EXCELLENT INTEGRATED SYSTEM LIMITED | Private company limited by shares | Live |
| INTEGRATED FACILITY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM INTEGRATION LIMITED | Private company limited by shares | Dissolved |
| C. Y. SYSTEM INTEGRATION LIMITED | Private company limited by shares | Dissolved |
| DCS SYSTEM INTEGRATION LIMITED | Private company limited by shares | Live |
| BAP SYSTEM INTEGRATION LIMITED | Private company limited by shares | Live |
| HQF SYSTEM INTEGRATION CO. LIMITED | Private company limited by shares | Live |
| TE System Integration Limited | Private company limited by shares | Live |
| System Integration Limited | Private company limited by shares | Live |
| JLB SYSTEM INTEGRATION LIMITED | | Live |
| INTELLITECH SYSTEM LIMITED | Private company limited by shares | Live |
| INTERNATIONAL SOCIETY OF DIRECT SELLING SYSTEM LIMITED | Private company limited by shares | Live |
| Total Solution International Vacuum System Limited | Private company limited by shares | Live |
| ON SYSTEM INVESTMENT LIMITED | Private company limited by shares | Live |
| ACE SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| IN SYSTEM INVESTMENT LIMITED | Private company limited by shares | Live |
| WIN SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOY SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NEW SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SYSTEM ACE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SKY SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WIN SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOP SYSTEM INVESTMENT LIMITED | Private company limited by shares | Live |
| Trade & Investment System Limited | Private company limited by shares | Live |
| SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TOP SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| SKY SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| WIN SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| NEW SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| SKY SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| IONE SYSTEM LIMITED | Private company limited by shares | Live |
| JAWIN SYSTEM LIMITED | Private company limited by shares | Live |
| JETLINK SYSTEM LIMITED | Private company limited by shares | Live |
| KANGEN SYSTEM (HOLDING) LIMITED | Private company limited by shares | Live |
| KENGEND SYSTEM LIMITED | Private company limited by shares | Dissolved |
| KENSUN SYSTEM LIMITED | Private company limited by shares | Live |
| KINGSMARK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| LAMBDA SYSTEM LIMITED | Private company limited by shares | Live |
| LEADEX SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| New Learning System Limited | Private company limited by shares | Live |
| SYSTEM LINKS LIMITED | Private company limited by shares | Dissolved |
| LOFTY SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| LONG SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GBM POS MACHINES & SYSTEM CO. LIMITED | Private company limited by shares | Dissolved |
| MANWAY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MapleTouch System Limited | Private company limited by shares | Live |
| MARK SYSTEM LIMITED | Private company limited by shares | Live |
| MAXSOUND SYSTEM LIMITED | Private company limited by shares | Live |
| MEDIHEALTH SYSTEM LIMITED | Private company limited by shares | Live |
| MEGA SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEM LIMITED | Private company limited by shares | Dissolved |