| String Limited | | Live |
| STRING CAPITAL LIMITED | Private company limited by shares | Dissolved |
| String capital Limited | Private company limited by shares | Live |
| String Enterprise Limited | Private company limited by shares | Live |
| WAH KEE STRING FACTORY LIMITED | Private company limited by shares | Live |
| GOLD STRING LIMITED | Private company limited by shares | Live |
| KAM SING STRING HARD WARE PRODUCTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| STRING INTERACTIVE LIMITED | Private company limited by shares | Live |
| MOON KEE STRING COMPANY LIMITED | Private company limited by shares | Dissolved |
| STRING MUST GO ON LIMITED | | Live |
| STRING ORGIN LIMITED | Private company limited by shares | Live |
| SMART STRING COMPANY LIMITED | Private company limited by shares | Live |
| STRINGBEAN LIMITED | Private company limited by shares | Dissolved |
| StringBoard Limited | Private company limited by shares | Live |
| MTH STRINGED MUSIC FORUM LIMITED | Company limited by guarantee | Live |
| STRINGER BELL LIMITED | Private company limited by shares | Live |
| STRINGHAM TRADING LIMITED | Private company limited by shares | Dissolved |
| STRINGNOTE LIMITED | Private company limited by shares | Live |
| Stringo Medical Technology Co., Limited | Private company limited by shares | Live |
| DL Strings Limited | Private company limited by shares | Live |
| 7 Strings Limited | Private company limited by shares | Live |
| 5 Strings Limited | Private company limited by shares | Live |