| MACKAY & COMPANY LIMITED | Private company limited by shares | Dissolved |
| MACKAY & COMPANY LIMITED | Private company limited by shares | Dissolved |
| MACKAY FAMILY LIMITED | Private company limited by shares | Live |
| Mackay Marine-Hong Kong Limited | Private company limited by shares | Live |
| MACKAY PROPERTIES LIMITED | Private company limited by shares | Live |
| MACKAY METER SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| MACKAYS CHINA (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MACKAYS ENTERPRISE (HONG KONG) LIMITED | Private company limited by shares | Live |