| SONTAK COMPANY LIMITED | Private company limited by shares | Dissolved |
| SONTAL LIMITED | Private company limited by shares | Live |
| SONTAX LIMITED | Private company limited by shares | Live |
| SONTE Limited | Private company limited by shares | Live |
| SONTEC LIMITED | Private company limited by shares | Live |
| Sontec Global Limited | Private company limited by shares | Dissolved |
| SONTEC INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SonTEC System Company Limited | Private company limited by shares | Dissolved |
| SONTEC TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| SONTECH LIMITED | Private company limited by shares | Dissolved |
| SONTECH GROUP LIMITED | Private company limited by shares | Live |
| SONTECH TRADING LIMITED | Private company limited by shares | Live |
| SONTEK LIMITED | Private company limited by shares | Live |
| SONTEX LIMITED | Private company limited by shares | Live |
| Sontex International Co., Limited | | Live |
| SONTEX GROUP LIMITED | Private company limited by shares | Live |
| SONTEX GARMENT MANUFACTURING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SONTEX SHIPPING LIMITED | Private company limited by shares | Live |
| SONTEX TRADE LIMITED | Private company limited by shares | Live |
| SONTIC LIMITED | Private company limited by shares | Live |
| SONTIX LIMITED | Private company limited by shares | Live |
| SONTON LIMITED | Private company limited by shares | Live |
| SONTON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SONTONIC ECOLOGY COMPLEX FIBER RESEARCH LIMITED | Private company limited by shares | Live |
| SONTOR LIMITED | Private company limited by shares | Live |
| Sontuso Limited | Private company limited by shares | Live |