| Organo Gold Management Limited | Private company limited by shares | Live |
| ORGANO SYNTHESIS TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| ORGANOCHEM LABORATORIES LIMITED | Private company limited by shares | Dissolved |
| DAOKANGNING (USA) ORGANOSILICON LIMITED | Private company limited by shares | Live |
| HONG KONG YUANMENG ORGANOSILICON CO., LIMITED | Private company limited by shares | Live |
| HK JIANLANG ORGANOSILICONE FINE CHEMISTRY INDUSTRY LIMITED | Private company limited by shares | Live |
| ORGAN-SAKAE COMPOPANY LIMITED | Private company limited by shares | Dissolved |
| ORGARHI LIMITED | | Live |
| ORGAZ LIMITED | Private company limited by shares | Dissolved |
| ORGBUILDING LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI ORGCHEM CO. LIMITED | Private company limited by shares | Dissolved |
| OrgChoice Limited | Private company limited by shares | Live |
| ORGCOMINVEST LIMITED | Private company limited by shares | Live |
| ORGEL CO., LIMITED | Private company limited by shares | Live |
| ACME ORGEL MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| Orgeon Energy Technology Limited | | Live |
| Orgill Asia Limited | Private company limited by shares | Live |
| ORGILL TRADING LIMITED | | Live |
| ORGINAL H LIMITED | Private company limited by shares | Live |
| WAROM ORGINAL LIMITED | Private company limited by shares | Dissolved |
| Orgnot Limited | Private company limited by shares | Dissolved |
| Orgold Limited | Private company limited by shares | Live |
| BE AN ORGONITE LIMITED | | Live |
| Orgox Limited | | Live |
| ORGRIMMAR SC CO., LIMITED | Private company limited by shares | Live |
| ORGRIMMAR TRADING COMPANY LIMITED | | Live |
| HK ORGS LATTICE BIOTECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ORGTECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Orgyen Buddhist Centre Company Limited | Company limited by guarantee | Live |
| ORHAN SHIPPING LIMITED | Private company limited by shares | Live |
| ORIA LIMITED | Private company limited by shares | Dissolved |
| ORIA LIMITED | Private company limited by shares | Dissolved |
| ORIA LIMITED | Private company limited by shares | Live |
| Group Oria Limited | Private company limited by shares | Live |
| ORIA INTERNATIONAL LIMITED | | Live |
| ORIA NETWORK LIMITED | Private company limited by shares | Dissolved |
| HK ORIA SCIENCE & TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Oria International Trade Co., Limited | Private company limited by shares | Live |
| ORIAIN-WILLAHELM LIMITED | | Live |
| ORIALLOYS TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| ORIAMA LIMITED | Private company limited by shares | Live |
| ORIAMO LIMITED | Private company limited by shares | Live |
| ORIAN LIMITED | Private company limited by shares | Live |
| ORIANA LIMITED | Private company limited by shares | Live |
| One Last Call (Oriana) Limited | Private company limited by shares | Live |
| ORIANA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ORIANA TRADE LIMITED | Private company limited by shares | Live |
| Wisdom Orianna Limited | Private company limited by shares | Live |
| ORIANT INTERNATIONAL (HONGKONG) LIMITED | Private company limited by shares | Live |
| ORIANT INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| ORIANTAL CORPORATED LIMITED | Private company limited by shares | Live |
| ORIANTAL UNION CAPITAL INVESTMENT INC. COMPANY LIMITED | Private company limited by shares | Dissolved |
| ORIANTECH TRADE CO., LIMITED | Private company limited by shares | Live |
| ORIANTIQUE.COM LIMITED | Private company limited by shares | Dissolved |
| ORIAS LIMITED | Private company limited by shares | Dissolved |
| ORIBI COMPANY LIMITED | Private company limited by shares | Dissolved |
| ORIBIX Company Limited | Private company limited by shares | Live |
| ORIBRI LIMITED | Private company limited by shares | Dissolved |
| ORIBULL LIMITED | Private company limited by shares | Dissolved |
| ORICA AUSTRALIA PTY LIMITED | Private company limited by shares | Dissolved |
| ORICA BIOTECH CO., LIMITED | Private company limited by shares | Dissolved |
| ORICAN ASIA LIMITED | Private company limited by shares | Live |
| ORICARE (HK) LIMITED | Private company limited by shares | Live |
| ORICARE (NATURAL) LIMITED | Private company limited by shares | Live |
| ORICH ELECTRONICS LIMITED | Private company limited by shares | Live |
| ORICH GROUP LIMITED | Private company limited by shares | Live |
| Orich Jewellery Limited | Private company limited by shares | Live |
| ORICH PIPE (HK) CO., LIMITED | Private company limited by shares | Live |
| ORICHAL BETA LIMITED | Private company limited by shares | Live |
| Orichal Dynamics Limited | Private company limited by shares | Live |
| ORICHAL PARTNERS LIMITED | Private company limited by shares | Live |
| ORICHAN ACCESSORY CO., LIMITED | Private company limited by shares | Dissolved |
| ORICK LIMITED | Private company limited by shares | Dissolved |
| ORICOLOR DIGITAL TECHNOLOGY LIMITED | | Live |
| ORICOM LIMITED | Private company limited by shares | Dissolved |
| Oriconn Technology Limited | Private company limited by shares | Live |
| ORICOR LIMITED | Private company limited by shares | Live |
| Ningbo Oricraft Foreign Trade Co., Limited | Private company limited by shares | Live |
| ORICROWN INVESTMENT LIMITED | Private company limited by shares | Live |
| ORICSSON BAG CO., LIMITED | Private company limited by shares | Live |
| Oricto Investment Limited | Private company limited by shares | Live |
| ZheJiang Orida Auto Parts Co., Limited | Private company limited by shares | Live |
| Oriday HK Limited | | Live |
| ORIDE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ORIDEA COMPANY LIMITED | Private company limited by shares | Live |
| Orident Dental Co., Limited | Private company limited by shares | Dissolved |
| Oridio Limited | Private company limited by shares | Live |
| ORIDO ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| OriDream Limited | | Live |
| Orieative Limited | Private company limited by shares | Live |
| Oriel Limited | Private company limited by shares | Dissolved |
| ORIEL TRADING LIMITED | Private company limited by shares | Live |
| ORIEM LIMITED | Private company limited by shares | Dissolved |
| ORIEME ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| Orien Limited | Private company limited by shares | Live |
| ORIEN ELECTRONICS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ORIEN FOCUS LIMITED | Private company limited by shares | Live |
| ORIEN FOOD COMPANY LIMITED | Private company limited by shares | Dissolved |
| China Orien Group Limited | Private company limited by shares | Live |
| ORIEN (H.K.) LIMITED | Private company limited by shares | Live |