| CHIU SING ENGINEERING LIMITED | Private company limited by shares | Live |
| CHONG SING ENGINEERING LIMITED | | Live |
| Sing Chong Engineering Company Limited | | Live |
| SING CHUEN ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CHUEN SING ENGINEERING LIMITED | | Live |
| SING CHUEN ENGINEERING (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHUNG SING ENGINEERING LIMITED | Private company limited by shares | Live |
| Chung Sing HK Engineering Company Limited | Private company limited by shares | Live |
| KIN SING ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| SING TAI ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| SING WAI ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| LIK SING ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| SING NGAI LUN AIR CONDITION & ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| Hoi Sing Engineering (HK) Co., Limited | Private company limited by shares | Live |
| Hip Sing Engineering (Hong Kong) Co., Limited | Private company limited by shares | Live |
| WING SING ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| WING SING E&M ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| YUEN SING ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| Ko Sing Air Conditioning Engineering Limited | Private company limited by shares | Live |
| MEN SING AIR CONDITIONING ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| SING FAI CONSTRUCTION & ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TAK SING CONSTRUCTION ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| SING FAI CONSTRUCTION & ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SING YIP CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| SING LEE ENGINEERING AND CONSTRUCTION LIMITED | Private company limited by shares | Dissolved |
| SING FLY CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| WAI SING CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHI SING CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YUE SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| SING KEI CONSTRUCTION & ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| WAH SING CONSTRUCTION & ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| KAM SING ENGINEERING CONSTRUCTION LIMITED | Private company limited by shares | Live |
| YAT SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| IU SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| SING WA CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Po Sing Construction Engineering Limited | Private company limited by shares | Live |
| YUK SING CONSTRUCTION & ENGINEERING LIMITED | Private company limited by shares | Live |
| YEU SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| TAK SING CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Hon Sing Construction & Engineering Limited | Private company limited by shares | Live |
| HO SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| YAT SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| Hoi Sing Construction Engineering Company Limited | Private company limited by shares | Live |
| O SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| SING WOO CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| Sing Tak Construction Engineering Limited | Private company limited by shares | Live |
| SING ZAI CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Sing Wai Engineering Construction Limited | Private company limited by shares | Live |
| Sun Sing Engineering and Construction Co. Limited | Private company limited by shares | Live |
| SING HO CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| Yiu Sing Construction Engineering Limited | Private company limited by shares | Live |
| Sky Sing Construction Engineering Limited | Private company limited by shares | Live |
| Hon Sing Construction Engineering Co. Limited | Private company limited by shares | Live |
| Fu Sing Construction & Engineering Company Limited | Private company limited by shares | Live |
| Gei Sing Construction Engineering Limited | | Live |
| Tin Sing Construction Engineering Limited | | Live |
| YAM SING CONSTRUCTION & ENGINEERING COMPANY LIMITED | | Live |
| SING SING CONSTRUCTION ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| Da Sing Construction & Engineering Co., Limited | Private company limited by shares | Live |
| WAI SING CONSTRUCTION ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| Yeu Sing Construction Design And Engineering Limited | Private company limited by shares | Live |
| HANG SING CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Hang Sing Construction and Engineering Limited | Private company limited by shares | Live |
| SING YIP CONSTRUCTION ENGINEERING (HK) LIMITED | Private company limited by shares | Dissolved |
| SING YIP CONSTRUCTION ENGINEERING (HK) LIMITED | Private company limited by shares | Live |
| WING SING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| Sing Yuet Construction Engineering Limited | Private company limited by shares | Live |
| Bai Sing Consultant Engineering Limited | Private company limited by shares | Live |
| TAK SING ENGINEERING CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| SING WO ENGINEERING CORPORATION LIMITED | Private company limited by shares | Dissolved |
| HO SING DECORATE ENGINEERING LIMITED | Private company limited by shares | Live |
| Bo Sing Demolish Engineering Limited | Private company limited by shares | Live |
| YUN SING DESIGN ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Sing Yu Design & Engineering Co. Limited | Private company limited by shares | Live |
| Yiu Sing Design & Engineering Limited | Private company limited by shares | Live |
| Wan Sing Design & Engineering Limited | Private company limited by shares | Live |
| ON SING DESIGN ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| MAN SING DESIGN ENGINEERING LIMITED | Private company limited by shares | Live |
| Sing To Design Engineering Limited | | Live |
| YAT SING CONCRETE DRILL CUT ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YUK SING ELECTRIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| CHUEN SING ELECTRIC BOX ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| LOK SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| KAI SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| KAM SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| SUN SING ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| YAU SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| Sing Wai Electrical Engineering Limited | Private company limited by shares | Live |
| HO SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| SING YU ELECTRICAL ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| Yat Sing Electrical Engineering Company Limited | Private company limited by shares | Live |
| Kin Sing Electrical Engineering Limited | Private company limited by shares | Live |
| Sing Sai Electrical Engineering Company Limited | Private company limited by shares | Live |
| WAH SING ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Yuk Sing Electrical Engineering Limited | | Live |
| Sing Tat Air-Condition & Electrical Engineering Limited | Private company limited by shares | Live |
| CHONG SING ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| CHUNG SING ELECTRICAL ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| FU SING ELECTRICAL ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| HING SING ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |