| PROLAB LIMITED | Private company limited by shares | Dissolved |
| PROLAB LIMITED | Private company limited by shares | Live |
| ProLab Communication HK Limited | Private company limited by shares | Live |
| PROLAB DIGITAL LIMITED | Private company limited by shares | Dissolved |
| PROLAB OPTOELECTRONICS (HK) LIMITED | Private company limited by shares | Live |
| PROLAB HOLDING LIMITED | Private company limited by shares | Dissolved |
| PRO-LAB EAST INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ProLab Solutions Limited | Private company limited by shares | Live |
| ProLab Tech Limited | Private company limited by shares | Live |
| PRO-LAB TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| PRO-LABEL PRINTING & MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| PROLAC (HK) CO., LIMITED | Private company limited by shares | Live |
| PROLACK COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROLAND LIMITED | Private company limited by shares | Dissolved |
| PROLAND LIMITED | Private company limited by shares | Live |
| PROLAND ENTERPRISES LIMITED | Private company limited by shares | Live |
| PROLAND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Proland Trade Limited | Private company limited by shares | Live |
| PRO-LANE LIMITED | Private company limited by shares | Live |
| PROLAP CO LIMITED | Private company limited by shares | Live |