| Optimal Family Health Limited | Private company limited by shares | Live |
| Optimal Healthcare Limited | Private company limited by shares | Live |
| OPTIMAL HERO LIMITED | Private company limited by shares | Live |
| OPTIMAL INTERNATIONAL (HK) LIMITED | Private company limited by shares | Dissolved |
| OPTIMAL J (HONGKONG) HOLDING LIMITED | | Live |
| HONG KONG OPTIMAL SHENG GROUP LIMITED | Private company limited by shares | Live |
| Optimal Axis Hong Kong Limited | Private company limited by shares | Live |
| Hong Kong Optimal Trade Company Limited | Private company limited by shares | Dissolved |
| OPTIMAL INCOME LIMITED | Private company limited by shares | Live |
| OPTIMAL INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| GOLD OPTIMAL INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HUIPIN OPTIMAL INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| GLOBAL OPTIMAL INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| OPTIMAL INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ty Optimal Ann International Limited | Private company limited by shares | Live |
| OPTIMAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Optimal Jiali Electronic (Hongkong) Company Limited | Private company limited by shares | Live |
| OPTIMAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| Oia Optimal Marketing Limited | Private company limited by shares | Live |
| Optimal Health Medical Limited | Private company limited by shares | Live |
| OPTIMAL MEDICAL LABORATORY (HONG KONG) LIMITED | Private company limited by shares | Live |
| OPTIMAL MEDICAL LABORATORY LIMITED | Private company limited by shares | Live |
| MEGA OPTIMAL LIMITED | | Live |
| OCEAN OPTIMAL COMPANY LIMITED | Private company limited by shares | Live |
| Optimal Outlook Limited | Private company limited by shares | Live |
| OPTIMAL PILLAR LIMITED | Private company limited by shares | Live |
| Optimal Point 118 Limited | Private company limited by shares | Live |
| OPTIMAL PRODUCT (CHINA) CO., LIMITED | Private company limited by shares | Live |
| CHINUO OPTIMAL PRODUCT INTERNATIONAL LIMITED | | Live |
| Mei Lan Optimal Product (Hong Kong) Limited | | Live |
| OPTIMAL PROMISE LIMITED | Private company limited by shares | Live |
| Optimal Property Limited | Private company limited by shares | Live |
| Optimal Point Property Limited | Private company limited by shares | Live |
| Optimal Movement And Rehabilitation Limited | Private company limited by shares | Live |
| OPTIMAL RESULT INVESTMENTS LIMITED | Private company limited by shares | Live |
| Optimal Results Limited | Private company limited by shares | Live |
| OPTIMAL RISE LIMITED | Private company limited by shares | Live |
| Rongqing Optimal Selection Limited | | Live |
| OPTIMAL SKIN LIMITED | Private company limited by shares | Live |
| OPTIMAL SOAR LIMITED | Private company limited by shares | Live |
| OPTIMAL SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| OPTIMAL SOLUTIONS LIMITED | Private company limited by shares | Live |
| OPTIMAL ASIA SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| Optimal Lead Solutions Limited | Private company limited by shares | Live |
| Optimal Sourcing Co., Limited | Private company limited by shares | Live |
| XIAMEN OPTIMAL STONE CO., LIMITED | Private company limited by shares | Live |
| OPTIMAL STORAGE LIMITED | Private company limited by shares | Dissolved |
| Optimal Strategy Limited | | Live |
| OPTIMAL SUCCESS LIMITED | Private company limited by shares | Live |
| OPTIMAL SUNBEAM (HK) COMPANY LIMITED | | Live |
| Optimal Talent Company Limited | Private company limited by shares | Live |
| OPTIMAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Yue Optimal Technology Limited | Private company limited by shares | Live |
| Optimal Technology Limited | | Live |
| OPTIMAL DE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Optimal Metal Technology Co., Limited | Private company limited by shares | Live |
| Optimal Trade Limited | Private company limited by shares | Live |
| Optimal Trading Limited | Private company limited by shares | Live |
| OPTIMAL - J TRADING LIMITED | Private company limited by shares | Live |
| DO OPTIMAL TRADING CO., LIMITED | Private company limited by shares | Live |
| Century Optimal Trading Co., Limited | | Live |
| OPTIMAL FOCUS TRADING LIMITED | Private company limited by shares | Live |
| OPTIMAL SOURCES TRADING LIMITED | Private company limited by shares | Live |
| OPTIMAL LINGUAL TRANSLATIONS LIMITED | Private company limited by shares | Live |
| True Optimal Limited | | Live |
| FRANCE UNIVERSAL OPTIMAL PRODUCT GROUP LIMITED | Private company limited by shares | Live |
| OPTIMAL VANTAGE LIMITED | Private company limited by shares | Live |
| Zhongyin Optimal Cosmetic Co., Limited | Private company limited by shares | Live |
| OPTIMALLY HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OptimalStocks.com. Limited | Private company limited by shares | Dissolved |
| Optimapp Limited | Private company limited by shares | Live |
| Optimas Capital Limited | Private company limited by shares | Live |
| OPTIM-ASIA LIMITED | Private company limited by shares | Live |
| OPTIMATE LIMITED | | Live |
| OPTIMAX LIMITED | Private company limited by shares | Live |
| OPTIMAX HEALTHCARE LIMITED | Private company limited by shares | Live |
| OPTIME LIMITED | Private company limited by shares | Dissolved |
| OPTIME CAPITAL INVESTMENT LIMITED | Private company limited by shares | Live |
| OPTIMERA LIMITED | | Live |
| Optimex Global Network Limited | Private company limited by shares | Live |
| OPTIMIN CAPITAL LIMITED | Private company limited by shares | Live |
| Optimind Limited | Private company limited by shares | Live |
| OPTIMINDS LIMITED | Private company limited by shares | Live |
| Age of Optimise Limited | Private company limited by shares | Live |
| OPTIMISE LUCK LIMITED | Private company limited by shares | Dissolved |
| IC Optimism Company Limited | | Live |
| OPTIMISM LIMITED | | Live |
| OPTIMISSION BUSINESS CO., LIMITED | | Live |
| OPTIMISSION GLOBAL CO., LIMITED | Private company limited by shares | Dissolved |
| Ganancias Optimista HK Limited | Private company limited by shares | Live |
| OPTIMISTIC BROTHERS LIMITED | Private company limited by shares | Live |
| OPTIMISTIC EXTENSION LIMITED | Private company limited by shares | Dissolved |
| Zero Display Optimistictronics Limited | Private company limited by shares | Live |
| OPTIMIT LIFE LIMITED | Private company limited by shares | Live |
| Optimization Limited | Private company limited by shares | Live |
| INTEGRATED OPTIMIZATION SOLUTION LIMITED | Private company limited by shares | Dissolved |
| Office Software Optimization Limited | Private company limited by shares | Live |
| LEAD SAIL SUPPLY CHAIN OPTIMIZATION LIMITED | | Live |
| Smart Optimization Limited | Private company limited by shares | Live |
| Business Optimization Solutions Studio Limited | Private company limited by shares | Live |