| Global Brain Sports Council Limited | Private company limited by shares | Live |
| Brain Key Global Capital (HK) Limited | Private company limited by shares | Live |
| Global Brain Network Limited | Private company limited by shares | Dissolved |
| GLORIA BRAIN LIMITED | Private company limited by shares | Dissolved |
| GLORY BRAIN LIMITED | Private company limited by shares | Live |
| BRAIN GLORY LIMITED | Private company limited by shares | Live |
| GOLD BRAIN LIMITED | Private company limited by shares | Dissolved |
| BRAIN GOLD LIMITED | Private company limited by shares | Live |
| GOOD BRAIN LIMITED | Private company limited by shares | Dissolved |
| GOOD BRAIN LIMITED | Private company limited by shares | Live |
| CHINA GREAT BRAIN GROUP CO., LIMITED | Private company limited by shares | Live |
| BRAIN GROUP LIMITED | Private company limited by shares | Live |
| Brain Key Group (Asia) Limited | Private company limited by shares | Live |
| BRAIN POWER GROUP LIMITED | Private company limited by shares | Live |
| HALL BRAIN LIMITED | Private company limited by shares | Dissolved |
| Happy Brain Limited | Private company limited by shares | Live |
| BRAIN HILL LIMITED | Private company limited by shares | Dissolved |
| BRAIN QUOTIENT (HK) LIMITED | Private company limited by shares | Dissolved |
| Smart Brain Holding Limited | Private company limited by shares | Live |
| Big Brain Hole Limited | Private company limited by shares | Live |
| HONEST BRAIN LIMITED | Private company limited by shares | Live |
| HONG KONG BRAIN DYNAMICS ASSOCIATION LIMITED | Private company limited by shares | Live |
| HONG KONG BRAIN FOUNDATION LIMITED -THE- | Company limited by guarantee | Live |
| BRAIN GAIN HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SUN BRAIN (HONG KONG) LIMITED | Private company limited by shares | Live |
| BRAIN (HONG KONG) LIMITED | Private company limited by shares | Live |
| BRAIN POWER ENTERPRISE (HONG KONG) LIMITED | Private company limited by shares | Live |
| BRAIN MASTER INVESTMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| Hong Kong Brain Memory Centre Limited | Private company limited by shares | Live |
| Hong Kong Pacific Brain Limited | Private company limited by shares | Live |
| HONG KONG BRAIN TRADE CO., LIMITED | Private company limited by shares | Live |
| WELL BRAIN (HONG KONG) LIMITED | Private company limited by shares | Live |
| Brain Hope Foundation Limited | Company limited by guarantee | Live |
| BRAIN HOUSE LIMITED | Private company limited by shares | Dissolved |
| HUMAN BRAIN LIMITED | Private company limited by shares | Dissolved |
| Brain Idea Limited | Private company limited by shares | Live |
| China Illusory Brain Metaverse Co., Limited | | Live |
| WIN BRAIN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UK Neil Brain Industrial Limited | Private company limited by shares | Live |
| WELL BRAIN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| Brain Infinity Centre Limited | Private company limited by shares | Live |
| ASIA (HK) WHOLE BRAIN MEMORY RESEARCH INSTITUTE LIMITED | Private company limited by shares | Live |
| BRAIN INTEGRATED CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| TOP BRAIN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Brain International Limited | Private company limited by shares | Dissolved |
| TOP BRAIN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BRAIN RICH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| RICH BRAIN INVESTMENT LIMITED | Private company limited by shares | Live |
| BRAIN SOURCE INVESTMENT LIMITED | Private company limited by shares | Live |
| BRAIN CITY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| BRAIN GLORY INVESTMENTS LIMITED | Private company limited by shares | Live |
| BRAIN RICH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SMART BRAIN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Jade Brain Verse Limited | | Live |
| KENT BRAIN LIMITED | Private company limited by shares | Dissolved |
| KEYLIGHT WHOLE BRAIN ACADEMY CO., LIMITED | Private company limited by shares | Live |
| BRAIN LEADER LIMITED | Private company limited by shares | Live |
| Brain Leader Company International Limited | Private company limited by shares | Live |
| BRAIN & MIND LEARNERS LIMITED | Private company limited by shares | Live |
| BRAIN LEGEND LIMITED | Private company limited by shares | Dissolved |
| Limitless Brain Limited | Private company limited by shares | Live |
| LINK BRAIN LIMITED | Private company limited by shares | Dissolved |
| BRAIN LINK LIMITED | Private company limited by shares | Dissolved |
| LINK BRAIN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Little Brain Education Hong Kong Limited | Private company limited by shares | Live |
| LONG BRAIN LIMITED | Private company limited by shares | Dissolved |
| LUCKY BRAIN LIMITED | Private company limited by shares | Dissolved |
| LUCKY BRAIN LIMITED | Private company limited by shares | Live |
| Made In Brain Limited | Private company limited by shares | Live |
| BRAIN MAGIC ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| Main Brain TV Company Limited | Private company limited by shares | Live |
| MASTER BRAIN MANAGEMENT LIMITED | Private company limited by shares | Live |
| BRAIN MARBLE LIMITED | Private company limited by shares | Dissolved |
| BRAIN MARK LIMITED | Private company limited by shares | Live |
| BRAIN MARKETING LIMITED | Private company limited by shares | Live |
| MASS BRAIN LIMITED | Private company limited by shares | Dissolved |
| MASTER BRAIN LIMITED | Private company limited by shares | Dissolved |
| MASTER BRAIN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BRAIN MASTER PUBLISHING LIMITED | Private company limited by shares | Live |
| BRAIN MEDICA LIMITED | Private company limited by shares | Dissolved |
| BOTAMEDI BRAIN HEALTH AND MEDICAL CARE COMPANY LIMITED | Private company limited by shares | Live |
| MicroPort Brain Sciences Company Limited | | Live |
| BRAIN MIND COMPANY LIMITED | Private company limited by shares | Dissolved |
| BRAIN MINING INVESTMENT CO. LIMITED | Private company limited by shares | Live |
| BRAIN MODERN LIMITED | Private company limited by shares | Dissolved |
| NATURAL BRAIN LIMITED | Private company limited by shares | Dissolved |
| BRAIN NETWORK LIMITED | Private company limited by shares | Dissolved |
| BRAIN NETWORK (HK) LIMITED | Private company limited by shares | Live |
| Brain Vision Neurotechnology Limited | | Live |
| BRAIN NICE LIMITED | Private company limited by shares | Dissolved |
| OSSA BRAIN LIMITED | | Live |
| IT BRAIN OVERSEAS LIMITED | Private company limited by shares | Dissolved |
| SKY BRAIN OVERSEAS DEV. (HK) LIMITED | Private company limited by shares | Dissolved |
| BRAIN PACIFIC LIMITED | Private company limited by shares | Dissolved |
| BRAIN AND CAPITAL PATRNERS COMPANY LIMITED | Private company limited by shares | Dissolved |
| BRAIN PLACEMENT HOLDING LIMITED | Private company limited by shares | Dissolved |
| BRAIN POOL LIMITED | Private company limited by shares | Live |
| Embrave Brain Potential Inspiration Association Limited | Company limited by guarantee | Live |
| Power Brain Rx Limited | Private company limited by shares | Live |
| Brain & Power Limited | Private company limited by shares | Live |