| UNIONLIGHT LIMITED | Private company limited by shares | Dissolved |
| UNIONLIGHT OPTOELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIONLIGHT OPTOELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| UNIONLINE LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UnionLink Asset Development Limited | | Live |
| UNIONLINK ENGINEERING LIMITED | Private company limited by shares | Live |
| UNIONLINK (HONG KONG) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION-LINK INTERNATIONAL TOBACCO (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK SERVICES LIMITED | Private company limited by shares | Dissolved |