| 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 |
| TrioAsset Limited | Private company limited by shares | Live |
| TRIOBAND REGISTRATIONS LIMITED | Private company limited by shares | Dissolved |
| TRIOCA COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOCCA LIMITED | Private company limited by shares | Live |
| TRIOCEANUS SHIPPING LIMITED | Private company limited by shares | Dissolved |
| TRIOCOM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Trioconsult Investment Limited | Private company limited by shares | Live |
| TRIOD TECH LIMITED | Private company limited by shares | Live |
| TRIODE TRADING CORPORATION LIMITED | Private company limited by shares | Live |
| TRIODES INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TRIODOR LIMITED | Private company limited by shares | Dissolved |
| TRIOFITS COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOFOOD LIMITED | Private company limited by shares | Live |
| TRIO-GAIN LIMITED | Private company limited by shares | Dissolved |
| TRI-OIL COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOLAB LIMITED | Private company limited by shares | Live |
| TRIOLAN INK LIMITED | Private company limited by shares | Live |
| TRIOLAND LIMITED | Private company limited by shares | Live |
| TRIOLANE LIMITED | Private company limited by shares | Live |
| TRIOLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Triolet Limited | | Live |
| TRIOLIC LIMITED | Private company limited by shares | Dissolved |
| TRIOLIGHT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TRIOLINK LIMITED | Private company limited by shares | Live |
| TRIOLINK LIMITED | Private company limited by shares | Live |
| TRIOLINK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TRIO-LITE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Trioloco Limited | Private company limited by shares | Live |
| Triology Limited | Private company limited by shares | Live |
| Trioloop Limited | Private company limited by shares | Live |
| TRIOLOT LIMITED | Private company limited by shares | Dissolved |
| TRIOM LIMITED | Private company limited by shares | Live |
| Triom Investments Limited | | Live |
| TRIOMARK LIMITED | Private company limited by shares | Dissolved |
| TRIOMARK LIMITED | Private company limited by shares | Dissolved |
| TRIOMATCH LIMITED | Private company limited by shares | Dissolved |
| TRIOMEDIC LIMITED | Private company limited by shares | Live |
| TRIOMONDO LIMITED | Private company limited by shares | Dissolved |
| STAR TRIOMPH INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| TRIOMPHE FINE CHEMISTRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOMPHE (CHINA) COMPANY LIMITED | Private company limited by shares | Live |
| Triomphe Trading & Consulting Limited | | Live |
| TRIOMPHE TOP EUROPE GROUPE LIMITED | Private company limited by shares | Live |
| Arc De Triomphe Furniture Limited | Private company limited by shares | Dissolved |
| TRIOMPHE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FRANCE TRIOMPHE INTERNATIONAL INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| HONG KONG ARC DE TRIOMPHE INT'L LIMITED | Private company limited by shares | Dissolved |
| ARC DE TRIOMPHE PHOTOGRAPHIC SOCIETY LIMITED | Company limited by guarantee | Dissolved |
| LE TRIOMPHE TRADING COMPANY LIMITED | Private company limited by shares | Live |
| LE TRIOMPHE EUROPEAN FASHION WHOLESALER COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRION COMPANY, LIMITED -THE- | Private company limited by shares | Dissolved |
| TRION LIMITED | Private company limited by shares | Live |
| TRION INTERNATIONAL (CHINA) LIMITED | Private company limited by shares | Dissolved |
| TRION CHINA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TRION INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Live Ceased dormancy on 11-Dec-2015 |
| MUNICH TRION DEUTSCHLAND (GERMANY) PHARMACEUTICAL LIMITED | Private company limited by shares | Live |
| TRION ENTERPRISE LIMITED | Private company limited by shares | Live |
| TRION INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Live |
| TRION COMPUTERS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| TRION JEWELLERY COMPANY LIMITED | Private company limited by shares | Live |
| TRION PACIFIC LIMITED | Private company limited by shares | Live Commenced dormancy on 22-May-2012 |
| Trion Solution Limited | | Live |
| TAIWAN TRION INTERNATIONAL LIMITED | Private company limited by shares | Live Commenced dormancy on 22-Jun-2015 |
| TRION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Trion International Trading Limited | Private company limited by shares | Live |
| TRIONES COMPANY LIMITED | Private company limited by shares | Dissolved |
| China Titaner Triones Foreign Trading (HK) Company Limited | | Live |
| Trionic Limited | Private company limited by shares | Live |
| TRIONICA LIMITED | Private company limited by shares | Dissolved |
| TRIONS LIMITED | Private company limited by shares | Live |
| TRIONS INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TRIONSEN LIMITED | Private company limited by shares | Live |
| TRIOO TECHNOLOGY GROUP CO., LIMITED | Private company limited by shares | Live |
| TRIOPETRA LIMITED | Private company limited by shares | Dissolved |