| LUEN SIU ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| NEW LUEN YIK ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN YAT ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| FU WAH LUEN ENGINEERING LIMITED | Private company limited by shares | Live |
| NEW LUEN YAU ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN TAT GAS ENGINEERING LIMITED | Private company limited by shares | Live |
| Luen Yun Engineering Company Limited | Private company limited by shares | Live |
| SUN LUEN ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Luen Tak Engineering Co Limited | Private company limited by shares | Live |
| Luen Kee Engineering Limited | Private company limited by shares | Live |
| Yiu Ho Yau Luen Engineering Limited | Private company limited by shares | Live |
| Nam Luen Engineering Limited | Private company limited by shares | Live |
| LUEN LIK ENGINEERING HK LIMITED | Private company limited by shares | Live |
| Luen Hoi Engineering Limited | | Live |
| Luen Wo Engineering Limited | | Live |
| CHI LUEN ENGINEERING COMPANY LIMITED | | Live |
| WAI HOP LUEN ENGINEERING LIMITED | | Live |
| Luen Yat Engineering Company Limited | | Live |
| LUEN LEE ENGINEERING LIMITED | | Live |
| LUEN FAT AIR-CONDITION ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| Luen Wo Air-Condition Engineering Limited | Private company limited by shares | Live |
| LUEN LIK ENGINEERING (ASIA) LIMITED | Private company limited by shares | Dissolved |
| LUEN TAI AUTOMATIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN FAT BOILERS ENGINEERING LIMITED | Private company limited by shares | Live Commenced dormancy on 17-Jun-2014 |
| LUEN WAN (CABLE) ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN CHEE ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| HOI LUEN ENGINEERING (CHINA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| YAU LUEN (CHINA) ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CHONG LUEN ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUEN CHONG ENGINEERING (ASIA) LIMITED | Private company limited by shares | Live |
| Luen Chong Digital Engineering Limited | Private company limited by shares | Live |
| LUEN CHONG ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Live |
| CHUNG LUEN E & M ENGINEERING LIMITED | Private company limited by shares | Live |
| CHUNG LUEN MECHANICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN FOOK ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| TUNG LUEN COMPUTER ENGINEERING LIMITED | Private company limited by shares | Live |
| KONG LUEN AIR CONDITION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN FAT AIR CONDITION MECHANICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN YAU AIR CONDITIONING ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN FAT ENGINEERING & CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Live |
| WAH LUEN CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SUN LUEN CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| YAU LUEN CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| WAI LUEN CONSTRUCTION ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| LUEN WAI CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| KIN LUEN CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN WAH CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| YAU LUEN CONSTRUCTION & ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| LUEN LIK CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Luen Jet Construction And Engineering Company Limited | Private company limited by shares | Live |
| HIP LUEN CONSTRUCTION ENGINEERING LIMITED | | Live |
| LUEN FU ENGINEERING CONSTRUCTION COMPANY LIMITED | | Live |
| LUEN CHONG CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| NGA LUEN CONSTRUCTION & ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| PAK LUEN CONSTRUCTION ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| LUEN HING CONSTRUCTION ENGINEERING LIMITED | | Live |
| LUEN HOP CONSTRUCTION ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| KONG LUEN CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| LUEN BON ( LI'S ) CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHIU LUEN CONSTRUCTION & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| WING LUEN CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUEN ON CONSTRUCTION AND ENGINEERING WORK LIMITED | Private company limited by shares | Dissolved |
| SUN YAU LUEN ENGINEERING & CONSULTANCY LIMITED | Private company limited by shares | Live |
| LUEN YEE DESIGN ENGINEERING LIMITED | Private company limited by shares | Live |
| Wui Luen Design Engineering Limited | Private company limited by shares | Live |
| LEUNG LUEN ELECTRIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHE LUEN ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN SAN ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN FAT ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUEN TAI ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YAU LUEN ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| WAI LUEN ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| CHUNG LUEN ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| LUEN WO AIR CONDITIONING & ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YAU LUEN (FU'S) ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN TAT ELECTRICAL ENGINEERING (KOWLOON) LIMITED | Private company limited by shares | Dissolved |
| LUEN FAT MECHANICAL & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN FAT ELECTRICAL & PUMPING ENGINEERING LIMITED | Private company limited by shares | Live |
| CHUNG LUEN ELECTRONIC ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN HOP ENGINEERING & ENTERPRISE COMPANY LIMITED | Private company limited by shares | Live |
| LUEN HOP ENGINEERING (SUM FAI) LIMITED | Private company limited by shares | Dissolved |
| HO SZE LUEN HING ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUEN HING ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN HING LEE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| LUEN HING ENGINEERING (1983) LIMITED | Private company limited by shares | Live |
| LUEN HING ENGINEERING (ASIA) LIMITED | Private company limited by shares | Live |
| Luen Hing (ASIA) Engineering Co. Limited | Private company limited by shares | Live |
| LUEN HING AIR CONDITION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| LUEN HING ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| LUEN HING ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Live |
| Luen Hing Scaffolding Engineering Limited | Private company limited by shares | Live |
| Luen Hing Yuen Engineering Limited | Private company limited by shares | Live |
| NG LUEN HOISTING ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| WAH LUEN ENGINEERING (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| KONG LUEN (HON'S) ENGINEERING LIMITED | Private company limited by shares | Live |
| TAK LEE (LUEN HOP) ENGINEERING LIMITED | Private company limited by shares | Live |
| LUEN HOP IRON ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUEN MING IRON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| LUEN KEUNG ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| KONG LUEN ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |