| MASTROPOLIS GROUP CO., LIMITED | Private company limited by shares | Live |
| HONGKONG MASTROPOLIS GROUP LIMITED | Private company limited by shares | Live |
| MASTROTTO GROUP (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MASTROTTO ITALIA ASIA LIMITED | Private company limited by shares | Dissolved |
| Nine Masts Capital Limited | Private company limited by shares | Live |
| MASTWELL LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAST-WORK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MASU COMPANY LIMITED | Private company limited by shares | Dissolved |
| Masu Digital Consultancy Company Limited | Private company limited by shares | Live |
| MASU SURVEY COMPANY LIMITED | Private company limited by shares | Live |
| Masu Trading Company Limited | Private company limited by shares | Live |
| MASUA LIMITED | Private company limited by shares | Dissolved |
| MASUDA LIMITED | Private company limited by shares | Dissolved |
| MASUDAYA HONGKONG LIMITED | Private company limited by shares | Live |
| MASUDO TRADING LIMITED | Private company limited by shares | Live |
| MASUFUMI LIMITED | Private company limited by shares | Dissolved |
| Masuka Limited | Private company limited by shares | Live |
| HK MASULISE CO., LIMITED | Private company limited by shares | Dissolved |
| MASUM POWER INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| MASUMA TRADING COMPANY LIMITED | Private company limited by shares | Live |
| MASUN LIMITED | Private company limited by shares | Dissolved |
| Masun Energy (Hongkong) Co., Limited | Private company limited by shares | Live |
| MASURA LIMITED | Private company limited by shares | Dissolved |
| MASURIE LIMITED | Private company limited by shares | Live |
| MASURIE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MASUTOYO COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MASWAY ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| MASWELL COMPANY LIMITED | Private company limited by shares | Dissolved |
| MASWELL COMPANY LIMITED | Private company limited by shares | Dissolved |
| MASWICK LIMITED | Private company limited by shares | Dissolved |
| MASWOOD LIMITED | Private company limited by shares | Live |
| MASWOOD INDUSTRY LIMITED | Private company limited by shares | Live |
| MASWORLD LIMITED | Private company limited by shares | Dissolved |
| MASZ HOLDING LIMITED | Private company limited by shares | Live |