| OPERATIONS & MAINTENANCE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Cardinal Operations Technology HK Limited | Private company limited by shares | Live |
| ASIA TELEVISION GLOBAL OPERATIONS CENTER CO., LIMITED | | Live |
| Think Operations Limited | Private company limited by shares | Live |
| Toyo (Asia Pacific Operations) Holding Limited | Private company limited by shares | Live |
| SKY TRADE OPERATIONS LIMITED | Private company limited by shares | Live |
| Trading Operations Limited | Private company limited by shares | Live |
| PACIFIC TRAMP OPERATIONS LIMITED | Private company limited by shares | Dissolved |
| OPERATIONS TRANSFORMATION COMPANY LIMITED | Private company limited by shares | Live |
| Triplesix Operations Limited | Private company limited by shares | Live |
| UNITED NETWORKS OPERATIONS LIMITED | Private company limited by shares | Live |
| Upscaling Operations Limited | Private company limited by shares | Live |
| China Urban Operations Management Group Co., Limited | | Live |
| MATTEL VENDOR OPERATIONS ASIA LIMITED | Private company limited by shares | Dissolved |
| WECO GLOBAL OPERATIONS LIMITED | Private company limited by shares | Live |
| WORLD WIDE OPERATIONS LIMITED | Private company limited by shares | Live |
| YLMM Group Operations Limited | Private company limited by shares | Live |
| Zengyi Cold Chain Operations Co., Limited | | Live |
| International Asset Zhengquanhua Operations and Management Co., Limited | Private company limited by shares | Live |
| ZHONGMAO COMMERCIAL OPERATIONS LIMITED | Private company limited by shares | Live |
| Vansun Tec Operation&Service Co., Limited | | Live |
| Operatium Limited | Private company limited by shares | Live |
| OPERATOR C LIMITED | Private company limited by shares | Live |
| CHINA IP OPERATOR LIMITED | Private company limited by shares | Dissolved |
| CHINA OCEAN SHIPPING AND CONTAINER OPERATOR LIMITED | Private company limited by shares | Live |
| CHINA DATA OPERATOR LIMITED | Private company limited by shares | Live |
| JAPAN OPERATOR ALLIANCE LIMITED | Private company limited by shares | Live |
| OVERSEAS THROUGH TRANSPORT OPERATOR FAR EAST LIMITED | Private company limited by shares | Dissolved |
| HONG KONG OPERATOR AND SERVICES LIMITED | Private company limited by shares | Dissolved |
| Smooth Operator Limited | Private company limited by shares | Live |
| General Trade Operator CO., Limited | Private company limited by shares | Dissolved |
| VALOREM OPERATOR LIMITED | Private company limited by shares | Live |
| FAMILY AMUSEMENT OPERATORS OF HONG KONG LIMITED | Company limited by guarantee | Dissolved |
| APAC Metaverse Operators Federation Limited | | Live |
| PACIFIC OPERATORS, LIMITED | Private company limited by shares | Dissolved |
| LUOTUO SHANGPIN OPERATORS (SHENZHEN) LIMITED | Private company limited by shares | Live |
| Smooth Operators Limited | Private company limited by shares | Live |
| United Art Operators of China Limited | Private company limited by shares | Live |
| YING FAT RADIO CAR OPERATORS ASSO. LIMITED | Company limited by guarantee | Dissolved |
| OPERAX LIMITED | Private company limited by shares | Dissolved |
| OPERIA LIMITED | Private company limited by shares | Live |
| OPERKS LIGHT CO., LIMITED | Private company limited by shares | Live |
| OPERS (HONG KONG) FURNITURE LIMITED | Private company limited by shares | Dissolved |
| OPERSKY COMPANY LIMITED | Private company limited by shares | Live |
| OPERSPAN LIMITED | Private company limited by shares | Dissolved |
| OPES LIMITED | Private company limited by shares | Live |
| OPES ADMINISTRATION LIMITED -THE- | Private company limited by shares | Live |
| Opes Anor Limited | Private company limited by shares | Live |
| OPES CALLAN LIMITED | Private company limited by shares | Live |
| OPES (H.K.) CO., LIMITED | Private company limited by shares | Live |
| OPES ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| Great Opes Limited | Private company limited by shares | Live |
| OPES GROUP LIMITED | Private company limited by shares | Live |
| Opes Holding Limited | | Live |
| OPES INTERNATIONAL HONG KONG LIMITED | Private company limited by shares | Dissolved |
| OPES International Limited | Private company limited by shares | Live |
| Opes Magnas Group Limited | | Live |
| OPES MANAGEMENT LIMITED -THE- | Private company limited by shares | Live |
| OPES WEALTH MANAGEMENT LIMITED | Private company limited by shares | Live |
| OPES METAL CO. LIMITED | Private company limited by shares | Live |
| Opes Noble Limited | Private company limited by shares | Live |
| Opes Officium Corporation Limited | | Live |
| PRIVATUM OPES LIMITED | Private company limited by shares | Live |
| Opes International Procurement and Purchasing Co. Limited | Private company limited by shares | Live |
| OPES Solutions Limited | Private company limited by shares | Live |
| OPES TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Opes Trading Company Limited | | Live |
| Opes World Limited | Private company limited by shares | Live |
| Opesac Limited | Private company limited by shares | Dissolved |
| OPESCO INVESTMENT LIMITED | Private company limited by shares | Live |
| OPESEA TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Opet Limited | Private company limited by shares | Live |
| OPETECH (HONG KONG) LIMITED | Private company limited by shares | Live |
| OPETON CO., LIMITED | Private company limited by shares | Live |
| OPEX LIMITED | Private company limited by shares | Dissolved |
| OPEX ELECTRONICS LIMITED | Private company limited by shares | Live |
| OPEX (HONG KONG) LIMITED | Private company limited by shares | Live |
| OPFIBRE (HK) LIMITED | Private company limited by shares | Live |
| OPFUTURE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| OPGI LIMITED | Private company limited by shares | Live |
| OPHAYA LIMITED | Private company limited by shares | Live |
| O'PHEE (CHINA) LIMITED | Private company limited by shares | Dissolved |
| O'PHEE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| OPHEE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| OPHEE FASHION GROUP INTERNATIONAL LIMITED | Private company limited by shares | Live |
| O'PHEE TRAVEL LIMITED | Private company limited by shares | Dissolved |
| OPHELIA GARDEN LIMITED | Private company limited by shares | Dissolved |
| Ophelia Hong Kong Limited | | Live |
| HK OPHELIA (INTETNATIONAL) INDUSTRIAN CO., LIMITED | Private company limited by shares | Live |
| Ophelia King Limited | Private company limited by shares | Live |
| Ophelia Public Relations Communications Limited | Private company limited by shares | Live |
| Ophelia's Bedroom Limited | Private company limited by shares | Live |
| OPHELIS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MEGAPOLISE OPHI LIMITED | Private company limited by shares | Dissolved |
| OPHI Studio Limited | | Live |
| Ophia Trading (HK) Limited | Private company limited by shares | Live |
| OPHIDIAN MATRIARCH HOLDINGS LIMITED | Private company limited by shares | Live |
| Ophion Limited | Private company limited by shares | Live |
| CHINA GOLDEN RADIX OPHIOPOGONIS WINES CO., LIMITED | Private company limited by shares | Dissolved |
| OPHIR LIMITED | Private company limited by shares | Dissolved |