| 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 |
| SYNPAK INDUSTRIAL (HK) CO., LIMITED | Private company limited by shares | Live |
| SYNPEAK LIMITED | Private company limited by shares | Live |
| SYNPHARM LIMITED | Private company limited by shares | Dissolved |
| SYNPLUZ SOLUTIONS COMPANY LIMITED | Private company limited by shares | Live |
| HK SYNPOWER LIMITED | Private company limited by shares | Live |
| SYNPOWER INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SynPower Capital Management Limited | Private company limited by shares | Live |
| Synpro Solutions Limited | Private company limited by shares | Live |
| SYNPROMAX LIMITED | Private company limited by shares | Live |
| Synpulse Hong Kong Limited | Private company limited by shares | Live |
| Synque Limited | Private company limited by shares | Live |
| SYNREE LIMITED | Private company limited by shares | Live |
| SYNREVOICE ASIA LIMITED | Private company limited by shares | Dissolved |
| Synrgi Limited | Private company limited by shares | Live |
| Synrgic (HK) Limited | Private company limited by shares | Live |
| Synrgic (Holdings) Limited | Private company limited by shares | Live |
| Synro Limited | Private company limited by shares | Live |
| Synsailing Limited | | Live |
| Synsasia Limited | Private company limited by shares | Live |
| Synsasia Group (Holding) Limited | Private company limited by shares | Live |
| Synsmooth Limited | | Live |
| SYNSOPHO LIMITED | Private company limited by shares | Live |
| SYNSPEC HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SYNST ELECTRONICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| SYNSTAK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SYNSTAR PHARMA CO., LIMITED | Private company limited by shares | Dissolved |
| SYNSTAR PHARMATECH CO., LIMITED | Private company limited by shares | Dissolved |
| SYNSTAR INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| SYNSTONES LIMITED | Private company limited by shares | Live |
| Synsun Investment Co., Limited | Private company limited by shares | Live |
| SYNSUN HEALTH CARE COMPANY LIMITED | Private company limited by shares | Live |
| Synsun Technology Limited | Private company limited by shares | Live |
| SYNTAC LIMITED | Private company limited by shares | Live |
| SYNTAG TECHNOLOGY LIMITED | Private company limited by shares | Live Commenced dormancy on 17-Jul-2015 |
| SYNTAGMA LIMITED | Private company limited by shares | Dissolved |
| SYNTAK CO. LIMITED | Private company limited by shares | Live |
| SynTao Advisors Limited | Private company limited by shares | Live |
| SynTao Green Finance International Limited | | Live |
| SynTao Sustainability Limited | | Live |
| SYNTAX LIMITED | Private company limited by shares | Dissolved |
| SYNTAX LIMITED | Private company limited by shares | Dissolved |
| SPACE SYNTAX LIMITED | Private company limited by shares | Live |
| SYNTAXCOM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Syntaxyz Asia Limited | Private company limited by shares | Live |
| SYNTE ENTERPRISE LIMITED | Private company limited by shares | Live |
| SYNTEC 99 LIMITED | Private company limited by shares | Dissolved |
| SYNTEC NEW ENERGY GROUP CO., LIMITED | Private company limited by shares | Live |
| SYNTEC CORPORATION LIMITED | Private company limited by shares | Live |
| Syntec Enterprise Limited | Private company limited by shares | Dissolved |
| SYNTEC HAPPY LIMITED | Private company limited by shares | Live |
| SYNTEC HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SYNTEC SEMICONDUCTOR EQUIPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNTEC NETWORK TECHNOLOGY & SERVICES COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNTEC OPTOELECTRONICS TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| SYNTECH LIMITED | Private company limited by shares | Live Commenced dormancy on 08-Apr-2005 |
| AI Syntech Limited | Private company limited by shares | Live |
| Syntech Asia Limited | Private company limited by shares | Live |
| SYNTECH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SYN-TECH (SHENZHEN) LIMITED | Private company limited by shares | Dissolved |
| SYN-TECH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Syntech Tooling Limited | Private company limited by shares | Live |
| Syntego ITS Limited | | Live |
| Syntegra RE Limited | Private company limited by shares | Live |
| SYNTEGRATE LIMITED | Private company limited by shares | Live |
| SYNTEK ELECTRIC CO., LIMITED | | Live |
| SYNTEK DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Syntek Holdings Limited | Private company limited by shares | Live |
| SYNTEK COMPUTER (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNITED SYNTEK HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HongKong SynTek Smart Technology Co., Limited | Private company limited by shares | Live |
| SYNTEK INDUSTRIAL LIMITED | Private company limited by shares | Live |