| S.Y.P. TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYPAW COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYPAX LIMITED | | Live |
| SYPEARL LIMITED | Private company limited by shares | Dissolved |
| Syphernetics Limited | | Live |
| Sypht (HongKong) Limited | Private company limited by shares | Live |
| Sypkidz Limited | Private company limited by shares | Live |
| SY-Planning Company Limited | Private company limited by shares | Live |
| SYPT ECOCARSTJ IMPORT&EXPORT CO., LIMITED | | Live |
| SYPT INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| SYRA LIMITED | Private company limited by shares | Dissolved |
| SYRAA SOURCING & SERVICE CO. LIMITED | Private company limited by shares | Live |
| SYRACUSE LIMITED | Private company limited by shares | Dissolved |
| SYRAH CLOUD TECHNOLOGY SHARES LIMITED | Private company limited by shares | Live |
| SYRAL ASIA LIMITED | Private company limited by shares | Live |
| SYRASAFE ENTERPRISES LIMITED | Private company limited by shares | Live |
| SYREN COMPANY LIMITED | Private company limited by shares | Dissolved |
| Syrgem Opto-Electronic Co., Limited | Private company limited by shares | Live |
| SYRGUAN TRADING COMPANY LIMITED | Private company limited by shares | Live |
| SYRILAND LIMITED | Private company limited by shares | Dissolved |
| SYRILIN COMPANY LIMITED | Private company limited by shares | Live |
| SYRIMPEX LIMITED | Private company limited by shares | Dissolved |
| SYRINGA LIMITED | Private company limited by shares | Dissolved |
| SYRINX LIMITED | | Live |
| SYRIX MEDIA LIMITED | Private company limited by shares | Dissolved |
| Syroete International Company Limited | Private company limited by shares | Live |
| SYRON CO., LIMITED | Private company limited by shares | Live |
| SYRON CONSULTING GROUP LIMITED | Private company limited by shares | Dissolved |
| SYROTECH NETWORKS LIMITED | Private company limited by shares | Live |
| Syrowatka Limited | Private company limited by shares | Live |
| SYRR INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| SYRTIS MAJOR LIMITED | | Live |
| SYRUP LIMITED | Private company limited by shares | Live |
| NEW SYRUP INTERACTIVE LIMITED | | Live |
| SYRUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Syrutra Group Co., Limited | Private company limited by shares | Live |
| S.Y.S YOSHIDA (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| SY'S Global Limited | | Live |
| SY'S ELECTRONIC AND PLASTIC INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| S.Y.S PUNCTUATION INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| ICS (Inter-China Sys) Logistics Co., Limited | Private company limited by shares | Live |
| SYS8 IP LIMITED | Private company limited by shares | Live |
| SYSAN LIMITED | Private company limited by shares | Live |
| SYSBEST LIMITED | Private company limited by shares | Live |
| SYSBIOLOGY HONG KONG LIMITED | Private company limited by shares | Live |
| SYSCAN INTERVISION LIMITED | Private company limited by shares | Dissolved |
| SYSCAN LAB., LIMITED | Private company limited by shares | Dissolved |
| SYSCO LIMITED | Private company limited by shares | Dissolved |
| SYSCO LIMITED | Private company limited by shares | Dissolved |
| Sysco HK Limited | Private company limited by shares | Live |
| SYSCO INVESTMENT LIMITED | Private company limited by shares | Live |
| SYSCOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Syscom Group Limited | Private company limited by shares | Live |
| SYSCOM HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Syscom Hong Kong Limited | | Live |
| SYSCOM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SYSCOM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SYSCOM INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| Syscom Networks Limited | Private company limited by shares | Live |
| SYSCOM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SYSCOM CYBER TELECOMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| SYSCOM-ELECTRONICS LIMITED | Private company limited by shares | Live |
| SYSCON LIMITED | | Live |
| SysConf Limited | Private company limited by shares | Live |
| SHANGHAI SYSCOPE LIMITED | Private company limited by shares | Dissolved |
| SYSCOPE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Syscore International Co., Limited | Private company limited by shares | Live |
| Syscore Energy, Limited | Private company limited by shares | Live |
| SYSCORP SOLUTIONS LIMITED | Private company limited by shares | Live |
| SYSCOTECH LIMITED | Private company limited by shares | Dissolved |
| SYSCRIBES SOLUTIONS PRIVATE LIMITED | Private company limited by shares | Live |
| SYSD LIMITED | Private company limited by shares | Live |
| Sysdelivery Limited | Private company limited by shares | Live |
| SYSDREAM ASIA LIMITED | Private company limited by shares | Dissolved |
| Sysdrinking Limited | Private company limited by shares | Dissolved |
| SYSDYNAMIC LIMITED | Private company limited by shares | Dissolved |
| sysfanclub Company Limited | Private company limited by shares | Live |
| SYSGEN PACIFIC LIMITED | Private company limited by shares | Dissolved |
| SYSHAN CAPITAL LIMITED | Private company limited by shares | Live |
| SYSHOLIC LIMITED | Private company limited by shares | Live |
| Sysiaco Eximtra Holdings (HK) Limited | Private company limited by shares | Live |
| SYSKALI LIMITED | Private company limited by shares | Live |
| SYSLANCE TECHNOLOGY SERVICES LIMITED | Private company limited by shares | Live |
| SYSLINK LIMITED | Private company limited by shares | Live |
| SYSLINK HK LIMITED | Private company limited by shares | Live |
| SYSLINK SYSTEMS CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| SYSLINK (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SYSLINK INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SYSLINK INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| SYSLINK ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| SYS-LINK TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| SYSLINTEC LIMITED | Private company limited by shares | Live |
| SYSLOGIC LIMITED | Private company limited by shares | Dissolved |
| SysLogic Company Limited | Private company limited by shares | Live |
| SYSLON (ASIA) LIMITED | Private company limited by shares | Live |
| SYSMA INTERNATIONAL TRADING CORPORATION (H.K.) LIMITED | Private company limited by shares | Live |
| SYSMAC COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSMAGIC SOFTWARE SOLUTION COMPANY LIMITED | Private company limited by shares | Live |
| SYSMAN LIMITED | Private company limited by shares | Dissolved |
| Sysmart Limited | Private company limited by shares | Live |