| AQUALIBRA LIMITED | Private company limited by shares | Dissolved |
| Aqualink Design Association Limited | | Live |
| AQUALINK ENGINEERING (HK) LIMITED | Private company limited by shares | Live |
| AQUALINK MATERIAL LIMITED | Private company limited by shares | Live |
| AQUALITY HK LIMITED | Private company limited by shares | Live |
| AQUALITY (BUILDING) LIMITED | Private company limited by shares | Dissolved |
| AQUALITY ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| AQUALITY (GEOTECHNICAL) ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| AQUALITY (GEOTECHNICAL) LIMITED | Private company limited by shares | Dissolved |
| AQUALITY (POOLS) LIMITED | Private company limited by shares | Dissolved |
| AQUALITY TESTCONSULT LIMITED | Private company limited by shares | Live |
| AQUALIX CO., LIMITED | Private company limited by shares | Live |