| Mercurius Limited | Private company limited by shares | Live |
| MERCURIUS HK LIMITED | Private company limited by shares | Live |
| Mercurius SLG Limited | Private company limited by shares | Live |
| H.K MERCURIUS INDUSTRY ALLIANCE CO., LIMITED | Private company limited by shares | Dissolved |
| BUSINESS MERCURIUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Mercurius Capital Limited | Private company limited by shares | Live |
| Mercurius E-commerce Limited | | Live |
| Mercurius Innovation Limited | Private company limited by shares | Live |
| Mercurius Consulting (Hong Kong) Group Limited | Private company limited by shares | Live |
| Mercurius Talent Management Limited | | Live |
| MERCURIUS PAYMENTS LIMITED | Private company limited by shares | Live |
| Mercurius Strategy Limited | Private company limited by shares | Live |