| MASTERY ENGINEERING LIMITED | Private company limited by shares | Live |
| MASTERY ENGINEERING HONG KONG LIMITED | Private company limited by shares | Live |
| MASTERY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ESSENTIAL MASTERY ASIA LIMITED | Private company limited by shares | Live |
| FELIX MASTERY CO., LIMITED | Private company limited by shares | Dissolved |
| Freedom Mastery Limited | Private company limited by shares | Live |
| MASTERY GAIN LIMITED | Private company limited by shares | Live |
| MASTERY GARMENT ACCESSORIES LIMITED | Private company limited by shares | Live |
| GOLD MASTERY LIMITED | Private company limited by shares | Dissolved |
| GOLDEN MASTERY LIMITED | Private company limited by shares | Live |
| GOLDEN MASTERY (HOLDINGS) LIMITED | Private company limited by shares | Live |
| GRAND MASTERY LIMITED | Private company limited by shares | Dissolved |
| Mastery Group Limited | Private company limited by shares | Dissolved |
| SHOW DEEP MASTERY (HK) LIMITED | Private company limited by shares | Dissolved |
| Ease Mastery (HK) Investment Limited | Private company limited by shares | Live |
| MASTERY (HK) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MASTERY HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| Sheng Mastery (Hong Kong) Co., Limited | Private company limited by shares | Dissolved |
| Mastery Tech (Hong Kong) Limited | | Live |
| MASTERY (HONG KONG) TRAVEL LIMITED | Private company limited by shares | Dissolved |
| HONGKONG FORTUNE MASTERY INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HONGKONG MASTERY IMPORT&EXPORT LIMITED | Private company limited by shares | Live |
| MASTERY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| MASTERY INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| Mastery Information Consulting Development Co., Limited | Private company limited by shares | Live |
| MASTERY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TOP MASTERY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| MASTERY INTERNATIONAL ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| Mastery International Co., Limited | Private company limited by shares | Live |
| HK MASTERY INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| DESTINATION MASTERY INTERNATIONAL LIMITED | | Live |
| HK GLOBAL MASTERY INTERNATIONAL EXPRESS LIMITED | Private company limited by shares | Live |
| HK GLOBAL MASTERY INTERNATIONAL EXPRESS LIMITED | | Live |
| Mastery Global International Limited | Private company limited by shares | Live |
| MASTERY INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| MASTERY INVESTMENT LIMITED | Private company limited by shares | Live |
| NEW MASTERY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| KINGSWAY TRAINING MASTERY LIMITED | Private company limited by shares | Dissolved |
| 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 |
| MASTEX COMPANY LIMITED | Private company limited by shares | Live |
| MASTEX ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MASTHEAD LIMITED | Private company limited by shares | Dissolved |
| MASTHEAD SHIPPING COMPANY, LIMITED -THE- | Private company limited by shares | Dissolved |
| Mastian Limited | | Live |
| ANDERSON MASTIC (CHINA) LIMITED | Private company limited by shares | Dissolved |
| HO CHING MASTIC ASPHALT COMPANY LIMITED | Private company limited by shares | Dissolved |
| MASTIC SYSTEM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| MASTICS ENTERPRISES CORPORATION LIMITED | Private company limited by shares | Dissolved |
| USA MALE MASTIEE BRAND INVESTMENT LIMITED | Private company limited by shares | Live |
| Mastiff Limited | | Live |
| China South African Mastiff Boerboel Breeding Limited | Private company limited by shares | Live |
| MASTINA LIMITED | Private company limited by shares | Live |
| MASTINI CREATIONS LIMITED | Private company limited by shares | Live |
| MASTIP ASIA LIMITED | Private company limited by shares | Live |
| MASTIP HONG KONG LIMITED | Private company limited by shares | Live |
| MASTLED LIGHTING TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| MASTO LIMITED | Private company limited by shares | Dissolved |