| TECSANA LIMITED | Private company limited by shares | Live |
| Tec-Serve Limited | Private company limited by shares | Live |
| HONGKONG TECSIN GLOBAL INTER GROUP LIMITED | Private company limited by shares | Dissolved |
| Tec-Sky Investment Limited | Private company limited by shares | Live |
| TecSo Limited | Private company limited by shares | Live |
| TECSON LIMITED | Private company limited by shares | Dissolved |
| TECSON LIMITED | Private company limited by shares | Live |
| TECSON (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| TECSON HONG KONG LIMITED | Private company limited by shares | Dissolved |
| TECSON INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TECSON INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TECSON PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| TECSON TRADE LIMITED | Private company limited by shares | Live |
| TECSON TRADING COMPANY, LIMITED | Private company limited by shares | Dissolved |
| TECSONIC LIMITED | Private company limited by shares | Dissolved |
| TECSONIC ASIA COMPANY LIMITED | Private company limited by shares | Dissolved |
| TECSPARK LIMITED | Private company limited by shares | Live |
| TECSPEED LIMITED | Private company limited by shares | Dissolved |
| TEC-SPIRAL ENTERPRISES CO., LIMITED | Private company limited by shares | Live |
| TECSTAR LIMITED | Private company limited by shares | Live |
| TECSTRAS LIMITED | | Live |
| TECSTRONG LIMITED | Private company limited by shares | Live |
| TECSUN LIMITED | Private company limited by shares | Live |
| TECSUN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TECSUN INVESTMENT LIMITED | Private company limited by shares | Live |
| TECSUN PHARMA LIMITED | Private company limited by shares | Live |
| NINGBO TECSYMOLD CO., LIMITED | Private company limited by shares | Live |
| TECSYS LIMITED | Private company limited by shares | Live |
| Tecsystem Asia Limited | Private company limited by shares | Live |