| BLOOMING SOUND INVESTMENT LIMITED | Private company limited by shares | Live |
| SOUND CENTURY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DRAGON SOUND INVESTMENT LIMITED | Private company limited by shares | Live |
| SOUND & EXCELLENT INVESTMENT LIMITED | Private company limited by shares | Live |
| FAIR SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GLAD SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HAPPY SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HARBOUR SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SOUND JOYCE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| LONG & SOUND INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| PILOT SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PINE SOUND INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUND TRADE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| YEAR SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNI SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| NOW SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TOP SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ON SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| BEST SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CAPITAL SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUND CHOICE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SOUND FAST INVESTMENTS LIMITED | Private company limited by shares | Live |
| FREE SOUND INVESTMENTS LIMITED | Private company limited by shares | Live |
| GLORY SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| HARBOUR SOUND INVESTMENTS LIMITED | Private company limited by shares | Live |
| LONG SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUND YEE LOONG INVESTMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| OCEAN SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| RICH SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SPECIAL SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SWORD SOUND INVESTMENTS LIMITED | Private company limited by shares | Live |
| SOUND TIME INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUND VENTURE INVESTMENTS LIMITED | Private company limited by shares | Live |
| YUEN SOUND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUND ISLAND LIMITED | Private company limited by shares | Dissolved |
| ISLAND LINK VIDEO AND SOUND LIMITED | Private company limited by shares | Dissolved |
| JADE SOUND COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUND JADE LIMITED | Private company limited by shares | Live |
| SOUND JADE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JAPAN SUONI SOUND COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUND IDEACTION JEWELRY LIMITED | Private company limited by shares | Dissolved |
| JOINT SOUND LIMITED | Private company limited by shares | Live |
| JOLLY SOUND LIMITED | Private company limited by shares | Dissolved |
| Sound Journey Limited | Private company limited by shares | Live |
| JOYFUL SOUND LIMITED | | Live |
| NINGBO KAIBO SOUND ELECTRONIC CO., LIMITED | Private company limited by shares | Dissolved |
| KALI SOUND TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| KEEN SOUND LIMITED | Private company limited by shares | Live |
| KEEN SOUND INVESTMENT LIMITED | Private company limited by shares | Live |
| Keen Sound International Trading Co., Limited | | Live |
| Keen Sound Technology Worldwide Co., Limited | | Live |
| KEEP SOUND LIMITED | Private company limited by shares | Dissolved |
| KIND SOUND LIMITED | Private company limited by shares | Dissolved |
| KIND SOUND INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| KING SOUND LIMITED | Private company limited by shares | Dissolved |
| KING SOUND ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| KING SOUND ELECTRONICS TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| HONG KONG KING SOUND ELECTRONICS LIMITED | Private company limited by shares | Live |
| KING SOUND (HK) INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| KING SOUND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| KING SOUND BOX TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| KING SOUND INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| SOUND KINGDOM LIMITED | Private company limited by shares | Dissolved |
| SOUND KINGDOM LIMITED | Private company limited by shares | Live |
| Kingstar Stage Lighting & Sound Co. Limited | Private company limited by shares | Live |
| Kokieboshi Sound Limited | Private company limited by shares | Live |
| SOUND KONNECT LIMITED | Private company limited by shares | Live |
| LOWTHER SOUND LABORATORY LIMITED | Private company limited by shares | Dissolved |
| GOX SOUND LABs Limited | Private company limited by shares | Live |
| Sound Labs Limited | Private company limited by shares | Live |
| SOUND MASTER LABS LIMITED | Private company limited by shares | Dissolved |
| LEADER SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND LEADER LIMITED | Private company limited by shares | Live |
| LEADING SOUND INVESTMENTS LIMITED | Private company limited by shares | Live |
| Legendary Sound Enterprises Limited | | Live |
| SOUND LIFE LIMITED | Private company limited by shares | Dissolved |
| LIFE SOUND LIMITED | Private company limited by shares | Dissolved |
| SOUND OF LIFE LIMITED -THE- | Private company limited by shares | Live |
| SOUND FOR LIFE LIMITED | Private company limited by shares | Live |
| Sound of the Light Limited | Private company limited by shares | Live |
| SOUND N LIGHT ANIMATRONICS COMPANY LIMITED | Private company limited by shares | Live |
| NC LIGHT AND SOUND CO., LIMITED | Private company limited by shares | Live |
| LS Light & Sound Co., Limited | Private company limited by shares | Live |
| BEST LIGHT AND SOUND CO., LIMITED | Private company limited by shares | Live |
| MAD LIGHT SOUND AND ENTERTAINMENT SYSTEMS CO., LIMITED | Private company limited by shares | Live |
| SOUND LIGHT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Emma Light And Sound (HK) Co., Limited | Private company limited by shares | Live |
| LIGHT SOUND IMAGE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| CXS SOUND AND LIGHT INDUSTRIAL LIMITED | Private company limited by shares | Live |
| USA YOUMING LIGHT & SOUND (HK) INT'L LIMITED | Private company limited by shares | Live |
| SOUND LIGHT INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MAYA LIGHT SOUND CO., LIMITED | Private company limited by shares | Live |
| MINGDIAN SOUND LIGHT LIMITED | Private company limited by shares | Live |
| GUANGZHOU RICHA SOUND AND LIGHT EQUIPMENT LIMITED | Private company limited by shares | Live |
| HK FENGWU LIGHTING SOUND EQUIPMENT LIMITED | Private company limited by shares | Live |
| SOUND LINE LIMITED | Private company limited by shares | Live |
| BEST LINE SOUND CO., LIMITED | Private company limited by shares | Live |
| SOUND LINK LIMITED | Private company limited by shares | Dissolved |
| LION SOUND LIMITED | Private company limited by shares | Dissolved |