| HYBRID SYNERGY YACHT SERVICES LIMITED | | Live |
| Young Synergy Limited | Private company limited by shares | Live |
| SYNERGY YOUTH LIMITED | Company limited by guarantee | Live |
| CHINA SYNERGY PROGRAMME FOR OUTSTANDING YOUTH LIMITED | Company limited by guarantee | Live |
| SYNERGY YUAN LIMITED | Private company limited by shares | Live |
| SYNERGY YUAN INVESTMENT LIMITED | Private company limited by shares | Live |
| Zoono Synergy HK Limited | Private company limited by shares | Live |
| Synergy-1 Strategic Company Limited | | Live |
| SYNERGY360 LIMITED | Private company limited by shares | Live |
| SYNERGY-CARGO CO LIMITED | Private company limited by shares | Live |
| SYNERGY-CARGO GROUP LIMITED | Private company limited by shares | Live |
| SYNERGYIT CONSULTING GROUP LIMITED | Private company limited by shares | Live |
| SYNERGY-QM CONSULTING SERVICES LIMITED | Private company limited by shares | Live |
| SYNERGYSYNQ LIMITED | Private company limited by shares | Live |
| SYNERGYTECH COMPANY LIMITED | Private company limited by shares | Live |
| SYNERGYTECH LIMITED | | Live |
| SYNERICH ENTERPRISES LIMITED | Private company limited by shares | Live |
| Synerk Biotech Limited | Private company limited by shares | Live |
| SynerLink System (Hong Kong) Limited | Private company limited by shares | Dissolved |
| SYNERMAN COMPANY LIMITED | Private company limited by shares | Live |
| Synermax Ecotechnology Limited | Private company limited by shares | Dissolved |
| SYNERMEDIC LIMITED | Private company limited by shares | Dissolved |
| Synermic Energy Limited | Private company limited by shares | Live |
| Synermore Company Limited | Private company limited by shares | Live |
| Synermore (Hong Kong) Limited | Private company limited by shares | Live |
| SYNERPOWER TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SynerSAT Limited | Private company limited by shares | Live |
| Synersia Limited | Private company limited by shares | Live |
| SYNERTEC GROUP CO. LIMITED | Private company limited by shares | Dissolved |
| SYNERTEC INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| SYNERTEC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Synertech Limited | Private company limited by shares | Dissolved |
| SYNERTECH ASIA LIMITED | Private company limited by shares | Dissolved |
| SYNERTECH ASIA LIMITED | Private company limited by shares | Dissolved |
| SYNERTECH BRIGHT FORTUNE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNERTECH HONG KONG CO. LIMITED | Private company limited by shares | Dissolved |
| SYNERTECH INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SYNERTECH PTE. LIMITED | Private company limited by shares | Live |
| SynerTek International Co., Limited | Private company limited by shares | Dissolved |
| Synerter Limited | Private company limited by shares | Live |
| SYNERTEX LIMITED | Private company limited by shares | Live |
| SYNERTONE ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| SYNERTRON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SYNERVIEW CONSULTING (HK) LIMITED | Private company limited by shares | Dissolved |
| SYNERWEALTH CAPITAL LIMITED | Private company limited by shares | Live |
| SynerWealth Financial Limited | Private company limited by shares | Live |
| SYNERWEALTH TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SynerWell Engineering Limited | Private company limited by shares | Dissolved |
| AE SYNERY LIMITED | Private company limited by shares | Live |
| ASIA SYNERY LIMITED | Private company limited by shares | Dissolved |
| SYNEST TRADING CO., LIMITED | Private company limited by shares | Live |
| SYNEST H.K. LIMITED | Private company limited by shares | Dissolved |
| SYNESYSTEK CONSULTING LIMITED | Private company limited by shares | Live |
| SYNET HK LIMITED | Private company limited by shares | Dissolved |
| Synet Limited | Private company limited by shares | Live |
| SYNETCOM (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Synetech Limited | Private company limited by shares | Live |
| SYNETIC HK LIMITED | Private company limited by shares | Live |
| SYNETOS LIMITED | Private company limited by shares | Live |
| SYNETT INFORMATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| SyneuRx Neuroscience HK Limited | Private company limited by shares | Live |
| SYNEWEALTH COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNEWS LIMITED | Private company limited by shares | Dissolved |
| SYNEX COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNEX CONSULTING LIMITED | Private company limited by shares | Dissolved |
| SYNEX GLOBAL TRADES LIMITED | Private company limited by shares | Live |
| SYNEX GROUP LIMITED | Private company limited by shares | Live |
| SYNEX INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SYNEX TECHNOLOGIES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SYNEXSER ASIA COMPANY LIMITED | Private company limited by shares | Live |
| Synext Service Limited | Private company limited by shares | Live |
| SYNEY ELEVATOR (HK) LIMITED | Private company limited by shares | Live |