| SEATEC HONGKONG CO., LIMITED | Private company limited by shares | Live |
| SEATEC CONSULTING COMPANY LIMITED | Private company limited by shares | Live |
| SEATEC SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| SEATECH LIMITED | Private company limited by shares | Live |
| SEATECH HK LIMITED | | Live |
| SEATECH SHIPPING CO., LIMITED | | Live |
| EAST SEATECH INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| Seatech Engineering Limited | Private company limited by shares | Live |
| SEATECH GROUP LIMITED | Private company limited by shares | Live |
| SEATECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SEATECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SEATECH CONSULTING HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SEATECH PLASTIC & METAL MANUFACTURING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEATECH MARINE LIMITED | Private company limited by shares | Dissolved |
| SEATECK ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| SEATECK (HONG KONG) CORPORATION LIMITED | Private company limited by shares | Live |