| Optimas Capital Limited | Private company limited by shares | Live |
| OPTIM-ASIA LIMITED | Private company limited by shares | Live |
| OPTIMATE LIMITED | | Live |
| OPTIMAVERA CONSULTING 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 |
| OPTIMIGI LIMITED | | 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 |
| Optimize Limited | Private company limited by shares | Dissolved |
| Bid and Optimize Limited | Private company limited by shares | Live |
| Optimize Business Limited | | Live |
| OPTIMIZE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OPTIMIZE INVESTMENT LIMITED | Private company limited by shares | Live |
| Optimized Harmony Company Limited | | Live |
| OPTIMIZER LIMITED | Private company limited by shares | Live |
| Trip Optimizer Company Limited | Private company limited by shares | Live |
| Optimizing Solutions Limited | | Live |
| OPTIMOLOGY RESEARCH AND SOLUTIONS LIMITED | Private company limited by shares | Live |
| OPTIMUM LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM SKY LIMITED | Private company limited by shares | Live |
| OPTIMUM LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM LIMITED | Private company limited by shares | Dissolved |
| JP OPTIMUM LIMITED | Private company limited by shares | Live |
| Optimum Limited | Private company limited by shares | Live |
| OPTIMUM SCF LIMITED | Private company limited by shares | Live |
| OPTIMUM COMPANY LIMITED | | Live |
| Optimum Accessories Limited | Private company limited by shares | Dissolved |
| OPTIMUM ADVANTAGE LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM ALIVE LIMITED | Private company limited by shares | Live |
| CHINA OPTIMUM NANO INNOVATION ALLIANCE LIMITED | Private company limited by shares | Live |
| OPTIMUM ASSERTS LIMITED | Private company limited by shares | Live |
| Optimum Capital G Limited | | Live |
| OPTIMUM CREATIVE LIMITED | Private company limited by shares | Live |
| OPTIMUM DRAGON COMPANY LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM ENTERPRISES LIMITED | Private company limited by shares | Live |
| FAITHFUL OPTIMUM LIMITED | Private company limited by shares | Live |
| HW Optimum Healthcare Limited | Private company limited by shares | Dissolved |
| OPTIMUM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM INVESTMENT LIMITED | Private company limited by shares | Live |
| ORIENTAL OBSIDIAN OPTIMUM ORGANIZATION GROUP LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM ORIENT LIMITED | Private company limited by shares | Live |
| OPTIMUM POINT HK LIMITED | Private company limited by shares | Live |
| OPTIMUM POWER LIMITED | Private company limited by shares | Live |
| OPTIMUM RESEARCH LIMITED | Private company limited by shares | Dissolved |
| Optimum Software Limited | Private company limited by shares | Live |
| OPTIMUM SOLAR LIMITED | Private company limited by shares | Live |
| OPTIMUM SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM SUCCESS LIMITED | Private company limited by shares | Dissolved |
| Gold Tech Optimum Limited | Private company limited by shares | Dissolved |
| OPTIMUM TOYS LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM TRADE LIMITED | Private company limited by shares | Live |
| OPTIMUM VISION LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM VISION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WEALTH OPTIMUM LIMITED | Private company limited by shares | Live |
| OptimumFlow Limited | | Live |
| OPTIMUMNANO ENERGY CO., LIMITED | Private company limited by shares | Live |
| OptimumX Company Limited | Private company limited by shares | Live |
| OPTIMUS LIMITED | Private company limited by shares | Dissolved |
| OPTIMUS LIMITED | Private company limited by shares | Live |
| Optimus HK Limited | Private company limited by shares | Live |
| Optimus Capital Limited | Private company limited by shares | Live |
| OPTIMUS CHINA LIMITED | Private company limited by shares | Dissolved |
| OPTIMUS ASIAN SHIPPING CO., LIMITED | Private company limited by shares | Live |
| OPTIMUS DISPLAY CO., LIMITED | Private company limited by shares | Live |
| OPTIMUS BUSINESS AND CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| Optimus Consulting (Asia) Limited | Private company limited by shares | Live |
| OPTIMUS ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Optimus Enterprises Limited | | Live |
| OPTIMUS GLOBAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| Optimus Global Solutions Limited | Private company limited by shares | Live |
| Optimus Golf Limited | | Live |
| Optimus Group Limited | Private company limited by shares | Dissolved |
| Optimus Investment Limited | Private company limited by shares | Live |
| OPTIMUS ASIA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Optimus Energy (Hong Kong) Limited | Private company limited by shares | Live |
| Optimus LED Lighting Limited | Private company limited by shares | Live |
| OPTIMUS LIGHTING LIMITED | Private company limited by shares | Live |