| SYOHACHI MANAGEMENT (TSUEN WAN) LIMITED | Private company limited by shares | Live |
| FUJIKURA SYOJI (GROUP) LIMITED | Private company limited by shares | Dissolved |
| KYUHO SYOJI (HK) LIMITED | Private company limited by shares | Dissolved |
| MIWA SYOJI LIMITED | | Live |
| SOGO SYOJI CO., LIMITED | Private company limited by shares | Live |
| LEAD SYOKAI, KABUSHIKIKAISHA LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Syoker Technologies Holding Limited | Private company limited by shares | Live |
| SYOLA LIMITED | Private company limited by shares | Dissolved |
| SYOMEI CONSULTING (H.K.) COMPANY LIMITED | Private company limited by shares | Live |
| TAIYO SYOMEI CONSULTING (HK) CO., LIMITED | Private company limited by shares | Live |
| SYON LIMITED | Private company limited by shares | Dissolved |
| Syon Limited | | Live |
| Syonanfuji Limited | | Live |
| SYOPTEK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hong Kong Syoryuken Technology Co., Limited | Private company limited by shares | Live |
| SYOSIN LIMITED | Private company limited by shares | Live |
| SYOU WA (ASIA) ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SYOU TRADE LIMITED | | Live |
| SYOUEI CORPORATION (HK) LIMITED | Private company limited by shares | Live |
| Hongkong syouei international trading Limited | Private company limited by shares | Live |
| NIPOU SYOUJI CO., LIMITED | Private company limited by shares | Live |
| YAMASHITA SYOUJI LIMITED | | Live |
| SYOUNAN MOULD LIMITED | Private company limited by shares | Live |
| SYOUNTEAM IND LIMITED | Private company limited by shares | Dissolved |
| SYOUNTIME INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SYOUSIN CO., LIMITED | Private company limited by shares | Live |
| SYOWA ENTERPRISES (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| 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 |