| POSEIDON LIMITED | Private company limited by shares | Dissolved |
| POSEIDON LIMITED | Private company limited by shares | Live |
| Poseidon One Limited | Private company limited by shares | Live |
| Poseidon (Asia) Limited | Private company limited by shares | Live |
| Poseidon Audio Limited | Private company limited by shares | Live |
| Poseidon Capital Limited | Private company limited by shares | Live |
| Poseidon Catering Limited | Private company limited by shares | Live |
| POSEIDON (CHINA) LIMITED | Private company limited by shares | Live |
| Poseidon Research China Co. Limited | Private company limited by shares | Live |
| Poseidon IAM Co., Limited | | Live |
| POSEIDON MARITIME CO., LIMITED | Private company limited by shares | Live |
| HK POSEIDON WISDOM INTERNATIONAL CULTURAL MEDIA CO., LIMITED | Private company limited by shares | Live |
| POSEIDON TRADE CO., LIMITED | Private company limited by shares | Live |
| Poseidon Consultancy Limited | | Live |
| POSEIDON EDUCATION COMPANY LIMITED | Private company limited by shares | Live |
| Poseidon Electronic Limited | Private company limited by shares | Live |
| POSEIDON ENTERPRISE LIMITED | Private company limited by shares | Live |
| POSEIDON ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| POSEIDON FASHIONS COMPANY LIMITED | Private company limited by shares | Dissolved |
| POSEIDON FREIGHT LIMITED | Private company limited by shares | Live |
| POSEIDON GROUP COMPANY LIMITED | Private company limited by shares | Live |
| CHINA POSEIDON GROUP ENERGY TRADING CO., LIMITED | | Live |
| POSEIDON STRATEGY GROUP CO. LIMITED | Private company limited by shares | Live |
| POSEIDON HEALTH CENTRE COMPANY LIMITED | Private company limited by shares | Dissolved |
| POSEIDON HILL CAPITAL LIMITED | | Live |
| KF & Poseidon Holding Limited | Private company limited by shares | Dissolved |
| Poseidon Investment Limited | Private company limited by shares | Dissolved |
| Poseidon Investment Limited | | Live |
| Poseidon Next Limited | Private company limited by shares | Live |
| POSEIDON SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| POSEIDON SHIPPING LIMITED | Private company limited by shares | Dissolved |
| Poseidon Shipping Limited | Private company limited by shares | Live |
| POSEIDON TECH HK LIMITED | | Live |
| POSEIDON TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| POSEIDON TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Poseidon Technology (Asia) Limited | | Live |
| HK Poseidon Trading Limited | Private company limited by shares | Live |
| POSEIDON TRADING LIMITED | Private company limited by shares | Live |
| Poseidon Trading Company Limited | | Live |
| POSEIDON WAVES LIMITED | | Live |
| Poseidon Yacht Service Limited | Private company limited by shares | Live |
| Poseidon Yachting Limited | Private company limited by shares | Live |
| Poseidonx Group (HK) Limited | Private company limited by shares | Live |