| MAINLY PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| MAINLY RICH LIMITED | Private company limited by shares | Dissolved |
| MAINLY RICH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINLY SUCCESS ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINLY VICTORY LIMITED | Private company limited by shares | Dissolved |
| MAINMAP LIMITED | Private company limited by shares | Dissolved |
| MAINMAST COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINMAST ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINMATE COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINMOON DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Mainnovation Company Limited | Private company limited by shares | Live |
| Mainny Limited | | Live |
| MAINON LIMITED | Private company limited by shares | Dissolved |
| MAINONG FOOD (KOREA) LIMITED | Private company limited by shares | Dissolved |
| MainPc Group (Hong Kong) Limited | Private company limited by shares | Dissolved |
| MAINPEX INTERNATIONAL CORP CO., LIMITED | Private company limited by shares | Live |
| MAINPLAS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINPLUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINPOINT ASIA LIMITED | Private company limited by shares | Live |
| MAINPOINT INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAINPOINT MATERIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINPOINT TEXTILES LIMITED | Private company limited by shares | Live |
| MAINPOINT TRADING LIMITED | Private company limited by shares | Live |
| MAINPOLE LIMITED | Private company limited by shares | Live |
| Mainpole Plastic Limited | | Live |
| MAINPOST LIMITED | Private company limited by shares | Dissolved |
| MAINPOTA COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINPOWER LIMITED | Private company limited by shares | Dissolved |
| MAINPOWER ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| MAINPROFIT COMPANY LIMITED | Private company limited by shares | Dissolved |
| MainProsperous Limited | Private company limited by shares | Live |
| MAINREEF LIMITED | Private company limited by shares | Dissolved |
| MAINRI CAPITAL LIMITED | Private company limited by shares | Live |
| Mainri Games (Hong Kong) Limited | Private company limited by shares | Live |
| MAINRICH LIMITED | Private company limited by shares | Dissolved |
| MAINRICH LIMITED | Private company limited by shares | Live |
| MAINRICH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINRICH ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINRICH PROPERTIES LIMITED | Private company limited by shares | Live |
| MAINRICH SHIPPING LIMITED | Private company limited by shares | Dissolved |
| Mainridepack Hong Kong Trade Consulting Limited | | Live |
| MAINRIFE COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINRIGHT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINRIVER INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Mainroad Corporation Limited | Private company limited by shares | Live |
| MAINROCK SALES LIMITED | Private company limited by shares | Live |
| MAINROOT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Mainrun Hotel Management Limited | Private company limited by shares | Live |
| MAIN'S SOLAR TECHNOLOGY (MSTA) LIMITED | Private company limited by shares | Live |
| MAINSAFE INVESTMENTS LIMITED | Private company limited by shares | Live |
| MAINSAIL LIMITED | Private company limited by shares | Dissolved |
| Mainsail Investment Limited | Private company limited by shares | Live |
| MAINSAN DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MAINSAN INDUSTRIES LIMITED | Private company limited by shares | Live |
| MAINSAN INVESTMENTS LIMITED | Private company limited by shares | Live |
| MAINSFIELD CLOTHING LIMITED | Private company limited by shares | Dissolved |
| MAINSFIELD CLOTHING (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| CHINA MAINSHARE INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Dissolved |
| MAINSIN SECURITY INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| MAINSING COMPANY LIMITED | Private company limited by shares | Live |
| MAINSINO INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAINSLIT ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINSON LIMITED | Private company limited by shares | Dissolved |
| Mainsong Consultancy Limited | Private company limited by shares | Dissolved |
| MAINSOUL COMPANY LIMITED | Private company limited by shares | Live |
| MAINSOURCE CHINA LIMITED | Private company limited by shares | Dissolved |
| MAINSPARK LIMITED | Private company limited by shares | Live |
| MAINSPRING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINSTAR LIMITED | Private company limited by shares | Live |
| MAINSTAR DISPLAY CO., LIMITED | Private company limited by shares | Live |
| MAINSTAR ELECTRICAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINSTAR ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINSTAR INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAINSTAR SHIPPING LIMITED | Private company limited by shares | Live |
| FUJIAN MAINSTAR SHIPPING LIMITED | Private company limited by shares | Live |
| MAINSTAR TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| MAINSTAR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Mainstar Textiles Limited | Private company limited by shares | Live |
| MAINSTAR TRADING LIMITED | Private company limited by shares | Live |
| MAINSTATE LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY COMPANY LIMITED | Private company limited by shares | Live |
| MAINSTAY ASIA LIMITED | Private company limited by shares | Live |
| Asian Mainstay Limited | Private company limited by shares | Dissolved |
| MAINSTAY ELECTRONIC CO., LIMITED | Private company limited by shares | Live |
| MAINSTAY & FORTUNE (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Mainstay Trading Co., Limited | Private company limited by shares | Live |
| MAINSTAY PROPERTY CONSULTANTS (HK) LIMITED | Private company limited by shares | Live |
| MAINSTAY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAINSTAY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY FASHION LIMITED | Private company limited by shares | Live |
| MAINSTAY GARMENTS LIMITED | Private company limited by shares | Live |
| MAINSTAY (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY GLOBAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY BUSINESS (HONG KONG) EVOLUTION CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAINSTAY INTERNATIONAL INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAINSTAY TECHNOLOGY LIMITED | | Live |
| HONGKONG MAINSTAY LINEN TEXTILE CO., LIMITED | Private company limited by shares | Dissolved |
| MAINSTAY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |