| 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 |
| ENERGY ELECTRICAL AIR-COND (MAINT) COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINTAI INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| MAINTEAM LIMITED | Private company limited by shares | Live |
| MAINTEAM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MAINTECH LIMITED | Private company limited by shares | Dissolved |
| MAINTECH LIMITED | Private company limited by shares | Live |
| MAINTECH ELECTRICAL & MECHANICAL CO LIMITED | Private company limited by shares | Live |
| MAINTECH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINTECH ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINTECH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Maintech System HK Limited | Private company limited by shares | Live |
| ACE MAINTENANCE LIMITED | Private company limited by shares | Live |
| HOI FU CAR MAINTENANCE COMPANY LIMITED | Private company limited by shares | Live |
| BO SUN CAR MAINTENANCE LIMITED | Private company limited by shares | Live |
| Hou Tin Maintenance Limited | Private company limited by shares | Live |
| LN Maintenance Limited | | Live |
| ASIA HIGHWAY MAINTENANCE ASSOCIATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| Drill Car Beauty Maintenance Center Limited | | Live |
| 123 Motor Beauty And Maintenance Limited | Private company limited by shares | Live |
| New Century Maintenance Company Limited | | Live |
| HK HX CONTAINERS MAINTENANCE LIMITED | | Live |
| E & K MAINTENANCE CONTRACTORS LIMITED | Private company limited by shares | Live |
| ENERGIE MAINTENANCE (ASIA) LIMITED | Private company limited by shares | Dissolved |
| FEI MA HYDROPOWER MAINTENANCE LIMITED | Private company limited by shares | Live |
| EMBROIDERY MACHINERY MAINTENANCE LIMITED | Private company limited by shares | Dissolved |
| FU WAH MOTOR MAINTENANCE LIMITED | Private company limited by shares | Dissolved |
| U.S.A. LEE-BETTER CAR MAINTENANCE MULTIPLE LIMITED | Private company limited by shares | Dissolved |
| L.K SWIMMING POOL MAINTENANCE LIMITED | Private company limited by shares | Live |
| YISHING SWIMMING POOL MAINTENANCE LIMITED | Private company limited by shares | Live |
| MANILA PORTS MAINTENANCE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| AMS Service & Maintenance HK Limited | Private company limited by shares | Dissolved |
| WING LEE SWIMMING POOL MAINTENANCE LIMITED | Private company limited by shares | Live |
| WING WAH (SERVICE & MAINTENANCE) COMPANY, LIMITED | Private company limited by shares | Dissolved |
| PACIFIC AIR MAINTERANCE AND SUPPLY COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINTEX LIMITED | Private company limited by shares | Dissolved |
| MAINTEX LIMITED | Private company limited by shares | Dissolved |
| MAINTEX LIMITED | Private company limited by shares | Live |
| MAINTEX ENTERPRISES LIMITED | Private company limited by shares | Live |
| MAINTEX FABRICS LIMITED | Private company limited by shares | Dissolved |
| MAINTEX INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| MAINTH COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINTIAN HEALTH LIMITED | Private company limited by shares | Live |
| MAINTIME LIMITED | Private company limited by shares | Live |
| MAINTIME ASIA LIMITED | Private company limited by shares | Dissolved |
| MAINTIME INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MAINTIME INVESTMENT LIMITED | Private company limited by shares | Live |
| MAINTON LIMITED | Private company limited by shares | Dissolved |
| MAINTON LIMITED | Private company limited by shares | Live |
| MAINTON INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAINTON INVESTMENTS LIMITED | Private company limited by shares | Live |
| MAINTOP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MAINTOP FASHIONS LIMITED | Private company limited by shares | Dissolved |
| MAINTOP HOLDING LIMITED | Private company limited by shares | Live |
| MAINTOP INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| MAINTOP VENTURE LIMITED | Private company limited by shares | Dissolved |
| MAINTOP VENTURE LIMITED | Private company limited by shares | Dissolved |
| MAINTOWN LIMITED | Private company limited by shares | Dissolved |
| MainTrack Asia Limited | Private company limited by shares | Live |
| MAINTRADE LIMITED | Private company limited by shares | Dissolved |
| MAINTRADE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MAINTRADE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Maintrading Limited | Private company limited by shares | Live |
| MAINTREND GLOBAL LIMITED | Private company limited by shares | Live |
| MAINTREND HOLDING GROUP LIMITED | Private company limited by shares | Live |
| MAINTREND INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| MAINTWEAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAINUO GROUP LIMITED | Private company limited by shares | Live |
| MAINUO INT'L (ITALY) GROUP LIMITED | | Live |
| MAINUO TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Mainvan New Technology Limited | Private company limited by shares | Live |
| MainVan Technology Co., Limited | Private company limited by shares | Live |
| Mainvan Trade Limited | | Live |
| MAINVAST COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAINVERVE LIMITED | Private company limited by shares | Dissolved |
| MAINVIEW LIMITED | Private company limited by shares | Dissolved |
| MAINVIEW LIMITED | Private company limited by shares | Dissolved |
| MAINVIEW LIMITED | Private company limited by shares | Live |
| MAINVIEW CORPORATION LIMITED | Private company limited by shares | Dissolved |
| MAINVIEW DEVELOPMENT LIMITED | Private company limited by shares | Live |
| MAINVIEW INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |