| DREAM TRIO LIMITED | Private company limited by shares | Live |
| DYNAMIC TRIO LIMITED | Private company limited by shares | Dissolved |
| Trio Dynamics Limited | Private company limited by shares | Live |
| Trio Music Education Limited | Private company limited by shares | Live Commenced dormancy on 16-Feb-2016 |
| TRI-O ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| TRIO ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| TRIO ENGINEERING SERVICE LIMITED | Private company limited by shares | Live |
| TRI-O (HONG KONG) ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO ENTERPRISES LIMITED | Private company limited by shares | Live |
| EUPHORIC TRIO COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO EXPERT LIMITED | Private company limited by shares | Dissolved |
| TRIO EXPRESS ENTERPRISES, LIMITED | Private company limited by shares | Dissolved |
| TRIO TOYS FACTORY LIMITED | Private company limited by shares | Dissolved |
| TRIO FASHION LIMITED | Private company limited by shares | Dissolved |
| TRIO FINANCE LIMITED | Private company limited by shares | Live |
| Trio Foods Limited | Private company limited by shares | Live |
| TRIO FRIEND ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TRIO FURNITURE LIMITED | Private company limited by shares | Live |
| TRIO GAME LIMITED | Private company limited by shares | Live |
| TRIO GLOBAL LIMITED | Private company limited by shares | Live |
| Trio Global Finance Limited | | Live |
| TRIO GROUP LIMITED | Private company limited by shares | Live |
| TRIO F&B CONSULTING GROUP LIMITED | Private company limited by shares | Live |
| ZHUM KONG TRIO (GROUP) CHEUNG WAI ELECTRICAL APPLIANCES LIMITED | Private company limited by shares | Dissolved |
| Trio Wine Group Limited | Private company limited by shares | Live |
| HAPPY TRIO LIMITED | Private company limited by shares | Live |
| TRIO HARVEST LIMITED | Private company limited by shares | Dissolved |
| TRIO HONEST LIMITED | Private company limited by shares | Dissolved |
| Trio (Hong Kong) Limited | Private company limited by shares | Live |
| INDIGO TRIO COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TRIO (ASIA) INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TRIO INDUSTRIAL (ASIA) LIMITED | Private company limited by shares | Live |
| TRIO INDUSTRIAL (CHINA) LIMITED | Private company limited by shares | Live |
| HK TRIO INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| Trio Industrial Components Limited | Private company limited by shares | Live |
| TRIO INDUSTRIAL GROUP LIMITED | Private company limited by shares | Dissolved |
| TRIO INDUSTRIAL (GROUP) LIMITED | Private company limited by shares | Live |
| Trio Industrial Electronics Group Limited | Private company limited by shares | Live |
| TRIO STAR INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TRIO INTERACTIVE COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO INTS LIMITED | | Live |
| TRIO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TRIO INVESTMENTS, LIMITED | Private company limited by shares | Dissolved |
| TRIO INVESTMENTS LIMITED | Private company limited by shares | Live |
| Trio Catering Investments Limited | Private company limited by shares | Live |
| TRIO JEWELLERY CO. LIMITED | Private company limited by shares | Live |
| Joyous Trio Jewellery Limited | Private company limited by shares | Live |
| TRIO ENGINEERING HONG KONG LIMITED | Private company limited by shares | Live |
| TRIO LANE (HONG KONG) LIMITED | Private company limited by shares | Live |
| TRIO LABELS COMPANY LIMITED | Private company limited by shares | Live |
| TRIO LIGHTING HONG KONG LIMITED | Private company limited by shares | Live |
| TRIO LINK LIMITED | Private company limited by shares | Dissolved |
| Trio Medical Limited | | Live |
| MUSICAL TRIO LIMITED | Company limited by guarantee | Live |
| TRIO OPERATION LIMITED | Private company limited by shares | Live |
| TRIO SHOES ORIENTAL LIMITED | Private company limited by shares | Live |
| TRIO PACIFIC LIMITED | Private company limited by shares | Dissolved |
| Trio Asia Pacific Limited | Private company limited by shares | Live |
| PEACEFUL TRIO COMPANY LIMITED | Private company limited by shares | Live |
| TRIO PLUS LIMITED | Private company limited by shares | Live |
| TRIO PRINTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO PRIVATE LIMITED | Private company limited by shares | Live |
| TRIO PRODUCTION LIMITED | Private company limited by shares | Live |
| TRIO ADVERTISING PRODUCTION LIMITED | Private company limited by shares | Dissolved |
| TRIO FILM PRODUCTIONS LIMITED | Private company limited by shares | Dissolved |
| TRIO PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| Trio Engineered Products (Hong Kong) Limited | Private company limited by shares | Live |
| Fortune Trio Property Investment Limited | Private company limited by shares | Live |
| ROBUSTA TRIO LIMITED | Private company limited by shares | Live |
| TRIO SEAFOODS SUPPLY, LIMITED -THE- | Private company limited by shares | Dissolved |
| SHANGHAI TRIO LIMITED | Private company limited by shares | Dissolved |
| TRIO SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Trio Shoes Limited | Private company limited by shares | Live |
| TRIO SOLUTIONS LIMITED | Private company limited by shares | Live |
| TRIO ELECTRIC SPECIALTIES LIMITED | Private company limited by shares | Dissolved |
| TRIO STAR COMPANY LIMITED | Private company limited by shares | Live |
| TRIO Studio Limited | | Live |
| TRIO SYSTEMS & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TRIO TECH & SYSTEM LIMITED | | Live |
| Trio Technologies Limited | Private company limited by shares | Live |
| TRIO TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO TECHNOLOGY ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| TRIO TOURS LIMITED | Private company limited by shares | Dissolved |
| TRIO ADVENTURE TOURS COMPANY LIMITED | Private company limited by shares | Live |
| TOUS Trio Co., Limited | Private company limited by shares | Live |
| TRIO TRADE LIMITED | Private company limited by shares | Live |
| TRIO TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO TRADING COMPANY LIMITED | Private company limited by shares | Live |
| TRIO INDUSTRY TRADING LIMITED | Private company limited by shares | Live |
| Trio Provisions Trading Limited | Private company limited by shares | Live |
| TRIO TRANSASIA COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIO TRINITY LIMITED | Private company limited by shares | Live |
| Happy Valley Trio Limited | Private company limited by shares | Live |
| TRIO WEALTH LIMITED | Private company limited by shares | Dissolved |
| TRIO WORKSHOP LIMITED | Private company limited by shares | Live |
| Trio Beauty Workshop Limited | Private company limited by shares | Dissolved |
| TRIO DESIGN AND WORKSHOP LIMITED | Private company limited by shares | Dissolved |
| Trio3 Limited | Private company limited by shares | Live |
| TRIO-AGRI HOLDING LIMITED | | Live |