| 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 |
| MAINSTAY MARKETING LIMITED | Private company limited by shares | Live |
| MAINSTONE LIMITED | Private company limited by shares | Live |
| MAINSTREAM LIMITED | Private company limited by shares | Dissolved |
| MAINSTREAM COMPANY LIMITED | Private company limited by shares | Live |
| MAINSTREAM LIMITED | | Live |
| MAINSTREAM ASIA LIMITED | Private company limited by shares | Dissolved |
| PARENTS ASSOCIATION OF AUTISTIC CHILDREN IN MAINSTREAM EDUCATION LIMITED -THE- | Company limited by guarantee | Live |
| Mainstream Enterprise Limited | Private company limited by shares | Live |
| MAINSTREAM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINSTREAM FINANCE LIMITED | Private company limited by shares | Dissolved |
| MAINSTREAM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| LONG MAINSTREAM LIMITED | | Live |
| Mainstream Trade Limited | Private company limited by shares | Live |
| Mainstreet Restaurant Limited | Private company limited by shares | Live |
| MAINSTREET TRADE LIMITED | Private company limited by shares | Dissolved |
| MAINSTREET TRADERS LIMITED | Private company limited by shares | Live |
| MAINSUN BUSINESS COMPANY LIMITED | Private company limited by shares | Live Ceased dormancy on 06-Dec-2006 |
| MAINSUN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAINSUN JEWELLERY COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINSURF INVESTMENTS LIMITED | Private company limited by shares | Dissolved |