| OCEAN-TIMBER INTIMATE COMPANY LIMITED | Private company limited by shares | Live |
| OCEANTIME SHIPPING LIMITED | Private company limited by shares | Dissolved |
| OCEANTRAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PMM OCEANTRANS LIMITED | Private company limited by shares | Live |
| OCEANTREND LIMITED | Private company limited by shares | Dissolved |
| HONGKONG OCEAN-UNITED INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| OceanUp Company Limited | | Live |
| OCEANUS LIMITED | Private company limited by shares | Dissolved |
| OCEANUS LIMITED | Private company limited by shares | Live |
| Oceanus HK Company Limited | Private company limited by shares | Live |
| OCEANUS LAB LIMITED | Private company limited by shares | Live |
| CMC Oceanus HK Limited | | Live |
| Oceanus Capital (Asia) Limited | Private company limited by shares | Live |
| Oceanus Business Limited | Private company limited by shares | Live |
| OCEANUS SUPPLY CHAIN LIMITED | Private company limited by shares | Live |
| OCEANUS CONSULTANCY LIMITED | Private company limited by shares | Live |
| Oceanus Digital Limited | | Live |
| OCEANUS ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OCEANUS HOLDING LIMITED | Private company limited by shares | Dissolved |
| Oceanus Holding Limited | Private company limited by shares | Live |
| OCEANUS INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| OCEANUS MARITIME COMPANY LIMITED | Private company limited by shares | Live |
| Oceanus Offshore Drilling Limited | Private company limited by shares | Live |
| Oceanus Shipping Limited | Private company limited by shares | Live |
| OCEANUS SHIPPING ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Oceanus Strategic Limited | Private company limited by shares | Live |
| OCEANUS SYSTEMS LIMITED | Private company limited by shares | Live |
| OCEANUS TEXTILES LIMITED | Private company limited by shares | Live |
| OCEANUSGAL INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| Oceanus-world Limited | Private company limited by shares | Live |
| OCEANVIC MARINE TRADING AND SERVICES PVT LIMITED | | Live |
| Oceanview Maritime Limited | Private company limited by shares | Dissolved |
| OCEANVIEW ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| OCEANVISION ENTERPRISE LIMITED | Private company limited by shares | Live Commenced dormancy on 05-Jan-2016 |
| OCEANVISION ENTERPRISE LIMITED | Private company limited by shares | Live |
| OCEANWARD LIMITED | Private company limited by shares | Dissolved |
| OCEANWARD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OCEAN-WAY LIMITED | Private company limited by shares | Dissolved |
| OCEANWAYS LIMITED | Private company limited by shares | Dissolved |
| OCEANWE INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| OCEANWE SHIPPING LIMITED | Private company limited by shares | Live |
| OCEANWELL LIMITED | Private company limited by shares | Dissolved |
| OCEANWELLS LIMITED | Private company limited by shares | Live |
| OCEANWICK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OCEANWIDE INC LIMITED | Private company limited by shares | Live |
| OCEANWIDE ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANWIDE ENTERPRISE LIMITED | | Live |
| Oceanwide Global Limited | | Live |
| HK Oceanwide Group Limited | Private company limited by shares | Live |
| OCEANWIDE SHIP MANUFACTURING LIMITED | Private company limited by shares | Live |
| OCEANWIDE MATERIALS HOLDING LIMITED | Private company limited by shares | Live |
| OCEAN-WIDE SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANWIDE TRADING LIMITED | Private company limited by shares | Dissolved |
| OCEANWIDE TRADING COMPANY LIMITED | Private company limited by shares | Live |
| OCEANWILL LIMITED | Private company limited by shares | Live |
| Air Oceanwill Limited | Private company limited by shares | Dissolved |
| OCEANWILL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OCEANWIN BUILDING MATERIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANWIN GROUP CO., LIMITED | Private company limited by shares | Live |
| Oceanwin Trade Co., Limited | Private company limited by shares | Live |
| Oceanwin Global Limited | Private company limited by shares | Live |
| OCEANWIN INT'L SHIPPING LIMITED | Private company limited by shares | Live |
| OCEANWIN INT'L SHIPPING LIMITED | Private company limited by shares | Live |
| OCEANWIN MARINE CO LIMITED | Private company limited by shares | Live |
| Oceanwin Taxation and Financial Services Limited | Private company limited by shares | Dissolved |
| OCEANWIN SHIPPING LIMITED | Private company limited by shares | Dissolved |
| OCEANWISDOM RESOURCES LIMITED | Private company limited by shares | Live |
| OCEANWISE SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANWISE SURVEYING COMPANY LIMITED | Private company limited by shares | Live |
| OCEANWIT LIMITED | Private company limited by shares | Dissolved |
| OCEANX MARINE SERVICE (HK) COMPANY LIMITED | Private company limited by shares | Live |
| Oceanx Technology Limited | Private company limited by shares | Live |
| OceanX Watch Limited | Private company limited by shares | Live |
| OCEANXPRESS INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| OCEANY INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| OCEANYIELD LIMITED | Private company limited by shares | Dissolved |
| OCEANYIELD ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| OCEANYIELD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OCEANZ COMPANY LIMITED | Private company limited by shares | Live |
| OCE-ASIA LIMITED | Private company limited by shares | Dissolved |
| Oceasian Technology Limited | Private company limited by shares | Live |
| OCEAVERSE LIMITED | Private company limited by shares | Live |
| OCEEN Consultancy & Trading Limited | Private company limited by shares | Live |
| OCEFEX SHIPPING LIMITED | Private company limited by shares | Live |
| Ocelina Company Limited | Private company limited by shares | Dissolved |
| OCELLE COMPANY LIMITED | | Live |
| O'CELLUS COMPANY LIMITED | Private company limited by shares | Live |
| Ocelot HK Co. Limited | Private company limited by shares | Live |
| Ocelot Limited | Private company limited by shares | Live |
| OCEN LIMITED | Private company limited by shares | Live |
| OCENUS INDUSTRY (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Oceoclar Limited | | Live |
| OCEP Industry Limited | Private company limited by shares | Live |
| Ocex Business Service Limited | Private company limited by shares | Live |
| Hikari ocha Limited | | Live |
| OCHANG CO., LIMITED | Private company limited by shares | Live |
| Ochange International Holding Co., Limited | Private company limited by shares | Live |
| H.K. OCHEER (INT'L) GROUP LIMITED | Private company limited by shares | Dissolved |
| OCHEMS LIMITED | Private company limited by shares | Live |
| OCHENVAY LIMITED | Private company limited by shares | Dissolved |