| OCEANMAP TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| OCEANMARK LIMITED | Private company limited by shares | Dissolved |
| OCEANMARK LIMITED | Private company limited by shares | Dissolved |
| OCEANMARK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OCEANMARK INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OCEANMATE LIMITED | Private company limited by shares | Dissolved |
| OCEANMAX AQUARIUM CO., LIMITED | Private company limited by shares | Live |
| OCEANMAX MARINE SERVICE (HONGKONG) LIMITED | Private company limited by shares | Live |
| OCEANMAX INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| OCEANMAX INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Oceanmax Shipping Limited | Private company limited by shares | Live |
| OCEANMAX TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANMED HEALTH (HK) LIMITED | Private company limited by shares | Dissolved |
| OCEANMED SEASKY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| OCEANMILL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| OCEANMINT LIMITED | Private company limited by shares | Dissolved |
| OCEANMIX DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| OCEANMO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HONG KONG OCEANMOBI TECHNOLOGY LIMITED | | Live |
| Oceanmoney Hongkong Company Limited | Private company limited by shares | Live |
| OceanNet Trading Limited | | Live |
| OCEANO LIMITED | Private company limited by shares | Dissolved |
| TRE OCEANO LIMITED | Private company limited by shares | Live |
| Oceano Company Limited | Private company limited by shares | Live |
| Oceano S.A Limited | Private company limited by shares | Live |
| OCEANO LIMITED | | Live |
| COMPANHIA ELECTRIC OCEANO ( HK ) LIMITED | Private company limited by shares | Live |
| COMPANHIA INDUSTRIAL OCEANO ( HK) LIMITED | Private company limited by shares | Dissolved |
| OCEANOGRAPHER LIMITED | Private company limited by shares | Dissolved |
| OCEANOLOGY HONGKONG LIMITED | Private company limited by shares | Live |
| Ocean&Oscar Limited | Private company limited by shares | Live |
| Oceanous Limited | Private company limited by shares | Live |
| OCEANOWAYS MARITIME LIMITED | Private company limited by shares | Live |
| OCEANPASS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Oceanpay Technology Limited | Private company limited by shares | Live |
| Oceanpayment Co., Limited | Private company limited by shares | Live |
| OCEANPEARL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OCEANPEER INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Oceanpine Future Limited | Private company limited by shares | Live |
| Oceanpine Capital Management Limited | Private company limited by shares | Live |
| Oceanpine Marvelous Limited | Private company limited by shares | Live |
| Oceanpine Triumph Limited | Private company limited by shares | Live |
| OCEANPLACE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OCEANPLAN LIMITED | Private company limited by shares | Live |
| OCEANPLUS LIMITED | Private company limited by shares | Dissolved |
| OceanPoint Associates Limited | Private company limited by shares | Live |
| OCEAN-POLA LIMITED | Private company limited by shares | Live |
| OCEANPORT CONSTRUCTION CO., LIMITED | Private company limited by shares | Dissolved |
| OCEANPORT PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| OCEANPORT TRADING LIMITED | Private company limited by shares | Dissolved |
| OCEANPROBE LIMITED | Private company limited by shares | Dissolved |
| OCEANPROP LIMITED | Private company limited by shares | Dissolved |
| OCEANRACE CO., LIMITED | Private company limited by shares | Live |
| OceanRay HK Limited | Private company limited by shares | Live |
| OCEAN-REACH COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANRISE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| OCEANROAD LIMITED | Private company limited by shares | Dissolved |
| Oceanrubtec Limited | Private company limited by shares | Live |
| OCEAN'S TWO LIMITED | Private company limited by shares | Live Commenced dormancy on 30-Aug-2010 |
| Oceans 4 Limited | Private company limited by shares | Dissolved |
| TWO OCEANS COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEANS COMPANY LIMITED | Private company limited by shares | Live |
| Two Oceans Limited | Private company limited by shares | Live |
| HK Oceans Limited | Private company limited by shares | Live |
| OCEANS ADVERTISING LIMITED | Private company limited by shares | Live |
| Oceans Beyond Limited | | Live |
| CALM OCEANS INVESTMENT LIMITED | Private company limited by shares | Live |
| Oceans Capital Limited | Private company limited by shares | Live |
| CENTRAL OCEANS ASIA LIMITED | Private company limited by shares | Live |
| CROSS OCEANS CHINA LIMITED | Private company limited by shares | Dissolved |
| CHINA OCEANS RESOURCES LIMITED | Private company limited by shares | Live |
| OCEANS CLICK COMPANY LIMITED | Private company limited by shares | Live |
| 5 Oceans Consultancy Limited | Private company limited by shares | Live |
| OCEAN'S DREAM LIMITED -THE- | Private company limited by shares | Live |
| Oceans First Limited | Private company limited by shares | Live |
| OCEANS FIVE LIMITED - THE - | Private company limited by shares | Dissolved |
| FIVE OCEANS LIMITED | Private company limited by shares | Dissolved |
| FIVE OCEANS LIMITED | Private company limited by shares | Dissolved |
| FIVE OCEANS LIMITED | Private company limited by shares | Live |
| FIVE OCEANS ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| FIVE OCEANS LAND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FIVE OCEANS MARITIME LIMITED | Private company limited by shares | Live |
| FIVE OCEANS METALS COMPANY LIMITED | Private company limited by shares | Live |
| GLOBAL OCEANS LIMITED | Private company limited by shares | Live |
| OCEAN'S GOODNESS LIMITED | Private company limited by shares | Dissolved |
| OCEAN'S GROUP ASIA LIMITED | Private company limited by shares | Live |
| Oceans Catering Group Company Limited | Private company limited by shares | Live |
| OTTO Oceans Holding Group Limited | | Live |
| Oceans Investment Group Limited | Private company limited by shares | Dissolved |
| Oceans Incorporations HK Limited | Private company limited by shares | Live |
| ALL OCEANS INVESTMENT CO. LIMITED | Private company limited by shares | Dissolved |
| OCEANS LINK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| THREE OCEANS LINK MARITIME LIMITED | Private company limited by shares | Live |
| NINE OCEANS LIMITED | Private company limited by shares | Dissolved |
| Nova Oceans Limited | Private company limited by shares | Live |
| Plastic Oceans Limited | Company limited by guarantee | Live |
| Rivera Oceans Limited | Private company limited by shares | Live |
| ALL OCEANS SHIPPING LIMITED | Private company limited by shares | Dissolved |
| SILVER OCEANS LIMITED | | Live |
| Super Oceans Holding Company Limited | Private company limited by shares | Live |