| HARBOUR SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND HERO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HONG KONG SIDESES SOUND EDUCATION CULTURE DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| TIANLONG SOUND (HONG KONG) TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUND HORN DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HUNDRED SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Sound Innovation Development Limited | Private company limited by shares | Live |
| WIN SOUND INVESTMENT & DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| JADE SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND KIND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MAIN SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MILLION SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND SOUND MULTI-MEDIA DEVELOPMENT LIMITED | Private company limited by shares | Live |
| OCEAN SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| PEOPLE SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| POWER SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| PRIDE SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SUIT SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SUPER SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SURE SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUND TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Sound Dragon Trading Development Limited | Private company limited by shares | Live |
| TRUTH SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUND VILLAGE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| WELL SOUND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUND WELL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| WHOLE SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| YIELD SOUND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| DIAMOND SOUND TRADING LIMITED | Private company limited by shares | Dissolved |
| DIRECT SOUND LIMITED | Private company limited by shares | Dissolved |
| DIRECT SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND OF MUSIC DISC COMPANY LIMITED | Private company limited by shares | Dissolved |
| ABSOLUTE SOUND DISTRIBUTION LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND DRAGON LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND LIMITED | Private company limited by shares | Dissolved |
| DREAM SOUND SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| SOUND DYNAMICS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Sound Dynasty Limited | Private company limited by shares | Live |
| EAGLE SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND OF THE EARTH MUSIC AND ARTS FOUNDATION LIMITED | Company limited by guarantee | Live |
| EASE SOUND LIMITED | Private company limited by shares | Dissolved |
| EASE SOUND LIMITED | Private company limited by shares | Live |
| SOUND EASE OVERSEAS LIMITED | Private company limited by shares | Live |
| SOUND EASE TRADING LIMITED | Private company limited by shares | Dissolved |
| JET SOUND FAR EAST LIMITED | Private company limited by shares | Live |
| EAST SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND EAST ASIA LIMITED | Private company limited by shares | Dissolved |
| EAST ASIA SOUND LIMITED | Private company limited by shares | Dissolved |
| EAST SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND EAST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI EAST SOUND MECHANICAL&ELECTRICAL LIMITED | Private company limited by shares | Live |
| SUPER SOUND FAR EAST LIMITED | Private company limited by shares | Live |
| SOUND EASY LIMITED | Private company limited by shares | Dissolved |
| EASY SOUND LIMITED | Private company limited by shares | Dissolved |
| EASY SOUND LIMITED | Private company limited by shares | Live |
| EASY SOUND ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ECHO SOUND LIMITED | Private company limited by shares | Dissolved |
| ECHO SOUND LIMITED | Private company limited by shares | Live |
| SOUND WAY ELECTRICAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELECTRICAL SOUND LIMITED | Private company limited by shares | Live |
| EXCELLENT SOUND ELECTRONIC LIMITED | Private company limited by shares | Live |
| LOVE SOUND ELECTRONIC (H K) CO., LIMITED | Private company limited by shares | Live |
| MAGNI SOUND ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| SOUND MASTER ELECTRONIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| BO SOUND ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| SUN SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| IN SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| NEW SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUND CAR ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| JHC Sound Electronics Company Limited | Private company limited by shares | Live |
| BEST SOUND ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| JET SOUND ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| I SOUND ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| SOUND EAR ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| SOUND HARBOUR ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| SOUL SOUND ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| VICTORY SOUND ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| EASTERN SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAX SOUND ELECTRONICS FACTORY LIMITED | Private company limited by shares | Dissolved |
| SOUND FAIR ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| GOOD SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| GOOD SOUND ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Headache Sound Electronics Limited | Private company limited by shares | Live |
| HILL SOUND ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| HAPPY SOUND ELECTRONICS INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SOUND INNO-HIT ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| SOUND PACIFIC ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| POWER SOUND ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| SOUND TECH ELECTRONICS LIMITED | Private company limited by shares | Live |
| UNITED SOUND ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| ELEGANT SOUND MUSIC CO. LIMITED | Private company limited by shares | Live |
| ELITE SOUND LIMITED | Private company limited by shares | Live |
| ELITE SOUND INVESTMENT LIMITED | Private company limited by shares | Live |
| EMMYA SOUND LIMITED | Private company limited by shares | Live |
| SOUND EMPIRE ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| SOUND ENERGY CO., LIMITED | Private company limited by shares | Live |
| SOUND ENGINEERING (CHINA) LIMITED | Private company limited by shares | Dissolved |
| EVER SOUND ENGINEERING LIMITED | Private company limited by shares | Live |