| SEAMAR LIMITED | | Live |
| SEAMAR (HONG KONG) LIMITED | Private company limited by shares | Live |
| SEAMAR INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SEAMAR INTERNATIONAL PIPELINE & SPECIALTIES LIMITED | Private company limited by shares | Dissolved |
| JOHNSON & CO. SEAMARCO LIMITED | Private company limited by shares | Dissolved |
| Seamarina Limited | Private company limited by shares | Live |
| SEAMARINE ELECTRONIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| SEAMARK CORPORATION LIMITED | Private company limited by shares | Dissolved |
| SEAMARK ENTERPRISES LIMITED | Private company limited by shares | Live |
| SEAMARK FREIGHT INTERNATIONAL (HK) COMPANY LIMITED | Private company limited by shares | Live |
| Seamark Holding Limited | Private company limited by shares | Live |
| SEAMARK INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| SEAMARK HONGKONG LIMITED | | Live |
| Seamark Industry Limited | Private company limited by shares | Live |
| SEAMARK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SEAMARK HK INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SEAMARK MARINE PROJECTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SEAMARK SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Seamark Technology (H.K.) Company Limited | Private company limited by shares | Live |
| Seamark ZM Technology Group (H.K.) Company Limited | Private company limited by shares | Live |
| Seamark Trading Limited | Private company limited by shares | Dissolved |
| Seamark Trading Co., Limited | Private company limited by shares | Live |
| SEAMART LIMITED | Private company limited by shares | Dissolved |
| SEAMART CATERING COMPANY LIMITED | Private company limited by shares | Live |