| STEC COMPANY LIMITED | Private company limited by shares | Dissolved |
| STEC FURNISHING CO., LIMITED | Private company limited by shares | Live |
| STEC MACHINERY CO., LIMITED | Private company limited by shares | Live |
| STEC HONG KONG LIMITED | Private company limited by shares | Live |
| STEC CORPORATION HONG KONG LIMITED | Private company limited by shares | Live |
| STEC INDUSTRY (HONG KONG) LIMITED | Private company limited by shares | Live |
| S-Tec Solutions Limited | Private company limited by shares | Live |
| TIN STECH LIMITED | Private company limited by shares | Dissolved |
| STECH LAB LIMITED | Private company limited by shares | Live |
| S-Tech Limited | Private company limited by shares | Live |
| S-TECH ASIA LIMITED | Private company limited by shares | Dissolved |
| S-TECH CO., LIMITED | Private company limited by shares | Dissolved |
| SATORI S-TECH HONG KONG CO., LIMITED | Private company limited by shares | Dissolved |
| STECH SOLAR CO., LIMITED | Private company limited by shares | Live |
| S-TECH GLOBAL LIMITED | Private company limited by shares | Live |
| S-TECH MACHINERY COMPANY LIMITED | Private company limited by shares | Live |
| S-Tech Solutions Limited | Private company limited by shares | Live |
| STech System Limited | Private company limited by shares | Live |
| S-Tech Technology Consulting Limited | Private company limited by shares | Live |
| S-Tech Technology Holding Limited | Private company limited by shares | Live |
| STECHCOL ENTERPRISE LIMITED | Private company limited by shares | Live |
| BEST STECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| S&techs Construction (Hong Kong) Co., Limited | Private company limited by shares | Live |
| S&TECHS (HONG KONG) LIMITED | Private company limited by shares | Live |
| STECHZ INNOVATION & ENGINEERING LIMITED | Private company limited by shares | Live |
| STECK INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| STECK ELECTRONIC TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| STECON COMPANY LIMITED | Private company limited by shares | Dissolved |
| STECSO HK LIMITED | Private company limited by shares | Live |