| JET SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| WIN SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL ONE LIMITED | Private company limited by shares | Dissolved |
| SIGNAL TWO LIMITED | Private company limited by shares | Dissolved |
| JET SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOP SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL HK LIMITED | Private company limited by shares | Live |
| SIGNAL 8 LIMITED | Private company limited by shares | Live |
| Signal IT Limited | Private company limited by shares | Live |
| Buy Signal Limited | Private company limited by shares | Live |
| VIP SIGNAL LIMITED | Private company limited by shares | Live |
| BIG BIG SIGNAL LIMITED | Private company limited by shares | Live |
| SIGNAL LIMITED | Private company limited by shares | Live |
| WIN SIGNAL LIMITED | Private company limited by shares | Live |
| 21 Signal Limited | | Live |
| Signal Ahead Limited | Private company limited by shares | Dissolved |
| ALLIED SIGNAL INVESTMENT LIMITED | Private company limited by shares | Live |
| WIN SIGNAL ASIA LIMITED | Private company limited by shares | Live |
| Signal Audio Engineering Limited | Private company limited by shares | Dissolved |
| SIGNAL ENTERPRISES (AUSTRALIA) LIMITED | Private company limited by shares | Dissolved |
| SIGNAL BEACON LIMITED | Private company limited by shares | Live |
| BEST SIGNAL LIMITED | Private company limited by shares | Live |
| BEST SIGNAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| BEST SIGNAL ONLINE LIMITED | Private company limited by shares | Live |
| Signal 10 Brewers Limited | Private company limited by shares | Live |
| CAPITAL SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL HEARING CENTRE LIMITED | Private company limited by shares | Live |
| CHAMPION SIGNAL LIMITED | Private company limited by shares | Dissolved |
| CHINA SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA SIGNAL LIMITED | Private company limited by shares | Live |
| DAILY SIGNAL (CHINA) LIMITED | Private company limited by shares | Dissolved |
| CLOUD SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| OH SIGNAL CO., LIMITED | Private company limited by shares | Live |
| SIGNAL HOLDING CO., LIMITED | Private company limited by shares | Dissolved |
| POWER & SIGNAL TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| Triumph Signal Co., Limited | | Live |
| Red Signal Computer Co. Limited | Private company limited by shares | Live |
| OMNI SIGNAL CONSULTANCY LIMITED | Private company limited by shares | Live |
| SIGNAL CONSULTING LIMITED | Private company limited by shares | Dissolved |
| CREATIVE SIGNAL LIMITED | Private company limited by shares | Live |
| DAILY SIGNAL LIMITED | Private company limited by shares | Live |
| SIGNAL DIGITAL LIMITED | Private company limited by shares | Dissolved |
| NEW SIGNAL ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| Signal Engineering Limited | Private company limited by shares | Live |
| DAILY SIGNAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SIGNAL ENTERPRISES LIMITED | Private company limited by shares | Live |
| Signal Entertainment HK Limited | Private company limited by shares | Live |
| EVER SIGNAL LIMITED | Private company limited by shares | Dissolved |
| EXPRESS SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL 8 EYEWEAR LIMITED | Private company limited by shares | Live |
| FORCE SIGNAL LIMITED | Private company limited by shares | Dissolved |
| FORTUNE SIGNAL LIMITED | Private company limited by shares | Dissolved |
| FULL SIGNAL COMPANY LIMITED | Private company limited by shares | Live |
| GAIN SIGNAL LIMITED | Private company limited by shares | Dissolved |
| G.D. SIGNAL LIMITED | Private company limited by shares | Dissolved |
| GEAR SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GLOBAL SIGNAL CO., LIMITED | Private company limited by shares | Live |
| GOLD SIGNAL LIMITED | Private company limited by shares | Dissolved |
| GOLD SIGNAL LIMITED | Private company limited by shares | Live |
| GOLDWELL SIGNAL LIMITED | Private company limited by shares | Dissolved |
| GOOD SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GOOD SIGNAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GREETING SIGNAL LIMITED | Private company limited by shares | Dissolved |
| Key Signal Group Limited | Private company limited by shares | Live |
| SIGNAL GROUP LIMITED | Private company limited by shares | Live |
| SIGNAL CAPITAL GROUP, LIMITED | Private company limited by shares | Dissolved |
| Signal Entertainment Group Limited | Private company limited by shares | Live |
| SIGNAL LUX HONG KONG LIMITED | Private company limited by shares | Dissolved |
| TOP SIGNAL HONG KONG LIMITED | Private company limited by shares | Dissolved |
| INTER SIGNAL LIMITED | Private company limited by shares | Dissolved |
| BIG SIGNAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MAY SIGNAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| D SIGNAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Signal Investments Limited | Private company limited by shares | Live |
| HOPE SIGNAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| RICH SIGNAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| JOIN SIGNAL LIMITED | Private company limited by shares | Dissolved |
| Signal Dynamics Hong Kong Limited | Private company limited by shares | Live |
| Lead Signal Limited | Private company limited by shares | Live |
| LUCKY SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL 8 MODEL MANAGEMENT LIMITED | Private company limited by shares | Live |
| MARK SIGNAL LIMITED | Private company limited by shares | Dissolved |
| Signal Master Limited | | Live |
| OCEAN SIGNAL LIMITED | Private company limited by shares | Live |
| PEACE SIGNAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| POWER SIGNAL COMPANY LIMITED | Private company limited by shares | Live |
| PRETTY SIGNAL LIMITED | Private company limited by shares | Dissolved |
| Signal Projects Limited | Private company limited by shares | Live |
| DIGITAL PURE SIGNAL LIMITED | Private company limited by shares | Live |
| RICH SIGNAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| RICH SIGNAL LIMITED | Private company limited by shares | Live |
| Signal Search Limited | Private company limited by shares | Live |
| SIGNAL 8 SECURITY LIMITED | Private company limited by shares | Live |
| SMART SIGNAL LIMITED | Private company limited by shares | Live |
| Signal of Souls Limited | | Live |
| SIGNAL SPREADER ENTERTAINMENT CO. LIMITED | Private company limited by shares | Dissolved |
| STAR SIGNAL LIMITED | Private company limited by shares | Dissolved |
| STRONG SIGNAL LIMITED | Private company limited by shares | Dissolved |
| SIGNAL STUDIO LIMITED | Private company limited by shares | Dissolved |