| INPTHREE PROFESSIONAL SOUND CO., LIMITED | Private company limited by shares | Live |
| INSTANT SOUND LIMITED | Private company limited by shares | Live |
| EIGHT SOUND MUSICAL INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| Sound Instrument (Hong Kong) Limited | Private company limited by shares | Live |
| Car Sound Insulation Workshop Limited | Private company limited by shares | Live |
| INTCEN SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND INTELLIGENCE HOLDING LIMITED | Private company limited by shares | Live |
| INTER SOUND LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL SOUND LIMITED | Private company limited by shares | Dissolved |
| MEZ SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Sound Lab International Limited | Private company limited by shares | Live |
| ART SOUND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Able Sound International Limited | Private company limited by shares | Live |
| ABRAHAM SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| PML Sound International (Asia) Limited | Private company limited by shares | Live |
| Aurora Sound International Group Limited | | Live |
| GERMANY BERLIN VOICE INTERNATIONAL SOUND COMPANY LIMITED | | Live |
| Best Sound International Limited | Private company limited by shares | Live |
| SOUND BEST INTERNATIONAL COMPANY (H.K.) LIMITED | Private company limited by shares | Live |
| BRIGHT SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SOUND BUSINESS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SOUND CAPITAL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHARTER SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA SOUND INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CHINA SOUND SYSTEM (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| Wan Sound International Co., Limited | Private company limited by shares | Live |
| PEAK SOUND INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Sound Plan International Co., Limited | Private company limited by shares | Live |
| INTERNATIONAL SOUND CONTROL LIMITED | Private company limited by shares | Live Ceased dormancy on 11-Apr-2002 |
| SOUND CREATION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EVER SOUND INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| RICH SOUND INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| DIFFERENT SOUND DIGITAL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| DRAGON SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EAST SOUND INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| SOUND OF MUSIC INTERNATIONAL EDUCATION LIMITED | Private company limited by shares | Live |
| EVER SOUND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FULL SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| GLORY SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| GOLD SOUND INTERNATIONAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SOUND GOOD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| INTERNATIONAL GOOD SOUND MERCY FOUNDATIOA LIMITED | Private company limited by shares | Live |
| GOOD SOUND INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| YY Good Sound International Trading Limited | Private company limited by shares | Live |
| GRAND SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SOUND GREAT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| GREAT SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| GREAT SOUND INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HAPPY SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| KEVIN SOUND INTERNATIONAL HOLDING LIMITED | Private company limited by shares | Live |
| BA SOUND INTERNATIONAL ELECTRONIC (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SOUND HOPE INTERNATIONAL ENTERPRISE CO. LIMITED | Private company limited by shares | Dissolved |
| ON SOUND INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND CAPITAL INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND YIELD INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOYFUL SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL SOUND AND LIGHT LIMITED | Private company limited by shares | Live |
| LONG SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| LUCKY SOUND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MAGIC SOUND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MAGIC SOUND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SOUND MASTER (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| CHILDREN SOUND INTERNATIONAL CULTURE MEDIA LIMITED | Private company limited by shares | Live |
| MILLION SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| H. K. INTERNATIONAL SOUND OF MUSIC LIMITED | Private company limited by shares | Live |
| SOUND OF MUSIC INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| OCEAN SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| RICH SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| RICH SOUND INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Live |
| SOUND RIGHT INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SAFE AND SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SAFE AND SOUND INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| SHANGHAI NEW SOUND INTERNATIONAL TRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SMART SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SOUND SOLUTIONS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SOUND SUCCESS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| TEAM SOUND (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| NEW SOUND TRADING INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| VICTORY SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SOUND VIEW INTERNATIONAL LIMITED | Private company limited by shares | Live |
| WAVE SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| WELL SOUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| WELL SOUND INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND WISE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| WISE SOUND INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND YEAR INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HK SYINMEI SOUND (INT'L) CO., LIMITED | Private company limited by shares | Live |
| CHINA SOUND INT'L HLDGS CO., LIMITED | Private company limited by shares | Live |
| ITALY RCF SOUND HK INT'L GROUP LIMITED | Private company limited by shares | Live |
| UK LAIDUN SOUND INT'L INVESTMENT LIMITED | Private company limited by shares | Live |
| VICTORY SOUND INT'L HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SOUND WAY INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FIT SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Sound Investment Asia Limited | Private company limited by shares | Live |
| SOUND BEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND BEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |