| PETRUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| PETRUS LIMITED | Private company limited by shares | Dissolved |
| Petrus HK Co Limited | Private company limited by shares | Live |
| Petrus Capital Limited | | Live |
| PETRUS CHEMICALS AND MATERIALS (HK) LIMITED | Private company limited by shares | Live |
| Petrus Corporate Consultancy Limited | Private company limited by shares | Live |
| Canadian Petrus Oil and Gas Hong Kong Limited | Private company limited by shares | Live |
| Petrus Industrial Limited | | Live |
| PETRUS JUVENILE PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| Petrus Asset Management Limited | | Live |
| PETRUS PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| ROCK PETRUS COMPANY LIMITED | Private company limited by shares | Dissolved |