| GIGAT Management Limited | Private company limited by shares | Live |
| Gigatech Co. Limited | Private company limited by shares | Live |
| GIGA-TECH COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| GIGA-TECH ROCK DRILLING LIMITED | Private company limited by shares | Live |
| GIGATECH (HK) CO., LIMITED | Private company limited by shares | Live |
| GIGATECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| GIGATEK LIMITED | Private company limited by shares | Live |
| Gigatel HK Limited | Private company limited by shares | Dissolved |
| GIGATRON LIMITED | Private company limited by shares | Live |
| GIGATRON (HK) LIMITED | Private company limited by shares | Live |