| SYNO INTERNATIONAL CAPITAL LIMITED | Private company limited by shares | Dissolved |
| Syno Digital Limited | Private company limited by shares | Live |
| SYNO TECHNOLOGY (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| SYNO STAR INTERNATIONAL LIMITED | | Live |
| SYNO SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYNO TRADING CO., LIMITED | Private company limited by shares | Live |
| SYNOCO INC. LIMITED | Private company limited by shares | Dissolved |
| SynoCode Group Limited | Private company limited by shares | Live |
| SYNOCODE SOLUTIONS (HONG KONG) LIMITED | | Live |
| SYNOFLO LIMITED | Private company limited by shares | Dissolved |
| Guangzhou Synogal Electronic Equipemrnt Limited | | Live |
| Synolux Corp. Limited | Private company limited by shares | Dissolved |
| Synomac Marine Engineering Co., Limited | Private company limited by shares | Live |
| SYNOMED HEALTH LIMITED | Private company limited by shares | Dissolved |
| SYNON (HONGKONG) INT'L HAIR SUPPLIES UTENSILS CO., LIMITED | Private company limited by shares | Dissolved |
| SYNONE INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| Synontem Limited | Private company limited by shares | Live |
| SYNOPOLY LIMITED | Private company limited by shares | Live |
| SYNOPSIS CONSULTING LIMITED | Private company limited by shares | Live |
| SYNOPSIS LATEST LIMITED | Private company limited by shares | Live |
| SYNOPSIS TECHNOLOGIES HK LIMITED | Private company limited by shares | Live |
| SYNOPSYS LIMITED | Private company limited by shares | Live |
| Synopsys Hong Kong Limited | Private company limited by shares | Live |
| Synopsys China Capital (Hong Kong) Company Limited | Private company limited by shares | Live |
| Synora Logistics Limited | Private company limited by shares | Live |
| SYNOREN LIMITED | Private company limited by shares | Live |
| Synortic Technology Limited | Private company limited by shares | Live |
| SYNOS HK LIMITED | | Live |
| SynoSmart Limited | Private company limited by shares | Live |
| SYNOTECH LIMITED | Private company limited by shares | Dissolved |
| SYNOTEK LIMITED | Private company limited by shares | Live |
| SYNOTEX ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SYNOVATE LIMITED | Private company limited by shares | Live |
| Creative Synovate Market Research Company Limited | | Live |
| SYNOVE LIMITED | Private company limited by shares | Live |
| SYNOVIA LIMITED | Private company limited by shares | Dissolved |
| SynoWorks Solutions Company Limited | Private company limited by shares | Dissolved |