| Mastery Labs Limited | Private company limited by shares | Live |
| Mastery Education Centre (Hiu Lai) Limited | Private company limited by shares | Live |
| Mastery In Languages Limited | Private company limited by shares | Live |
| MASTERY (L&C) HK LIMITED | Private company limited by shares | Live |
| LIFE MASTERY LEAGUE LIMITED | Private company limited by shares | Live |
| MASTERY MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| MASTERY MANAGEMENT CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| Mastery Data Center Investment Management Company Limited | | Live |
| MASTERY MANOR LIMITED | Private company limited by shares | Live |
| MASTERY MANUFACTORY COMPANY LIMITED | Private company limited by shares | Live |
| Mastery Mart Co., Limited | Private company limited by shares | Live |
| MAXLINK MASTERY LIMITED | Private company limited by shares | Live |
| MASTERY CLEANING & MICE KILLER LIMITED | Private company limited by shares | Live |
| Mastery Mould (HK) Industrial Co., Limited | Private company limited by shares | Dissolved |
| MASTERY ORIENT LIMITED | Private company limited by shares | Live |
| MASTERY (NFK) PLASTERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Mastery Education Centre (Nan Hai Plaza) Limited | Private company limited by shares | Live |
| MASTERY EDUCATION AND TRAINING PROFESSIONALS LIMITED | Private company limited by shares | Live |
| MASTERY PROFITS LIMITED | Private company limited by shares | Live |
| MASTERY QUALITY LIMITED | Private company limited by shares | Live |
| ROSY MASTERY LIMITED | Private company limited by shares | Live |
| Mastery Schools and Services (Hong Kong) Limited | Private company limited by shares | Live |
| SELF MASTERY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Mastery Consultancy Service Co. Limited | | Live |
| MASTERY SERVICES LIMITED | Private company limited by shares | Live |
| MASTERY SHIPPING LIMITED | Private company limited by shares | Live |
| MASTERY STRAIGHT LIMITED | Private company limited by shares | Live |
| MASTERY EDUCATION CENTRE (SUNNINGDALE) LIMITED | Private company limited by shares | Live |
| MASTERY SPEECH AND SWALLOWING CLINIC LIMITED | Private company limited by shares | Live |
| MASTERY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| MASTERY QUALITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MASTERY EDUCATION CENTRE (HO MAN TIN) LIMITED | Private company limited by shares | Live |
| Mastery Toys Limited | | Live |
| MASTERY TRADING LIMITED | Private company limited by shares | Dissolved |
| MASTERY TRAVEL LIMITED | Private company limited by shares | Dissolved |
| Mastery Trust Limited | | Live |
| MASTERY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MASTERY EDUCATION CENTRE (TO KWA WAN) LIMITED | Private company limited by shares | Live |
| Wealth Mastery Co. Limited | Private company limited by shares | Live |
| WORLD MASTERY LIMITED | Private company limited by shares | Live |
| WORLD MASTERY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MASTERYEAR LIMITED | Private company limited by shares | Live |
| MASTERYOUTH LIMITED | Private company limited by shares | Dissolved |
| Master'Z Pro Limited | Private company limited by shares | Live |