| Tresin (Hong Kong) Information Technology Company Limited | Private company limited by shares | Live |
| TRIPLE-ENTENTE INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| TROY INFORMATION TECH INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TROY Information Technology Co., Limited | Private company limited by shares | Live |
| TSINGJIAO INFORMATION SCIENCE (HK) LIMITED | Private company limited by shares | Live |
| UBiCube Information Technologies Co., Limited | Private company limited by shares | Live |
| Shanghai Ucloud Information Technology Co., Limited | Private company limited by shares | Live |
| UCloud Information Technology (HK) Limited | Private company limited by shares | Live |
| UENO INFORMATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| BERJAYA U-LUCK INFORMATION SYSTEMS LIMITED | Private company limited by shares | Live |
| UNIAGE INFORMATION SERVICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNICOM-CITY (HONG KONG) INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNIFY INFORMATION CO., LIMITED | Private company limited by shares | Dissolved |
| UNIFY INFORMATION SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Unihoch Health Information Co., Limited | Private company limited by shares | Dissolved |
| Unionbees Network Technology Information Co., Limited | Private company limited by shares | Live |
| Huizhou Unionman Information Technology Co., Limited | Private company limited by shares | Dissolved |
| UNIONMEMORY INFORMATION LIMITED | Private company limited by shares | Live |
| UNITED INFORMATION LIMITED | Private company limited by shares | Dissolved |
| BROTHERS UNITED INFORMATION SERVICE LIMITED | Private company limited by shares | Live |
| UNITED ASIA INFORMATION CO., LIMITED | Private company limited by shares | Dissolved |
| United Acoustic Information (HongKong) Sea Technology Co., Limited | Private company limited by shares | Live |
| UNITED GENE INFORMATION LIMITED | Private company limited by shares | Dissolved |
| UNITED INFORMATION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED INFORMATION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| United Information Technology International Co., Limited | Private company limited by shares | Live |
| UNITED INFORMATION TECHNOLOGY (H.K.) COMPANY LIMITED | Private company limited by shares | Live |
| Unitevo Information Limited | | Live |
| Unitizen Information Co. Limited | Private company limited by shares | Live |
| UNIVERSAL INFORMATION LIMITED | Private company limited by shares | Live |
| UNIVERSAL S & T INFORMATION COMMUNICATION CENTER (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL INFORMATION CONSULTING CO., LIMITED | Private company limited by shares | Live |
| HK HAKOM UNIVERSAL BUSINESS INFORMATION CONSULTING LIMITED | Private company limited by shares | Live |
| HK UNIVERSAL FINANCE INFORMATION CONSELING LIMITED | Private company limited by shares | Live |
| UNIVERSAL JIAYUAN INFORMATION CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL MASTER INFORMATION (HK) COMPANY LIMITED | Private company limited by shares | Live |
| UNIVERSAL INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Uniwin Information Limited | Private company limited by shares | Live |
| UPASCAL INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| U-Run Information Consultant Limited | | Live |
| USAY INFORMATION TECHNOLOGY CO., LIMITED | | Live |
| Utishield (Hong Kong) Information Technology Company Limited | Private company limited by shares | Live |
| U-ZONE INFORMATION (HK) CO., LIMITED | Private company limited by shares | Live |
| Vackiit Information Technology Co., Limited | | Live |
| HK VANGUARD INFORMATION TECH LIMITED | Private company limited by shares | Live |
| VData Information Technology Co., Limited | | Live |
| Vector Information Technology Company Limited | Private company limited by shares | Dissolved |
| VINBIP INFORMATION AND TECHNOLOGY LIMITED | | Live |
| VIRTUS INFORMATION LIMITED | Private company limited by shares | Live |
| 5 VISION INFORMATION LIMITED | Private company limited by shares | Dissolved |
| VISTA INFORMATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| VISUAL INFORMATION PRODUCTION LIMITED | Private company limited by shares | Live |
| VISUN INFORMATION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| VNET INFORMATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| Vnets Information Technology Limited | | Live |
| VOICE INFORMATION PROCESSING SERVICE LIMITED | Private company limited by shares | Dissolved |
| VOICE INFORMATION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| V-SIX MANAGEMENT INFORMATION SYSTEM LIMITED | Private company limited by shares | Dissolved |
| WaChing Information Limited | | Live |
| WAHYI INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Wandi Information Technology Limited | Private company limited by shares | Live |
| Wanfeng Information Technology Co., Limited | Private company limited by shares | Live |
| WANGUO INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Wanzhong Information Technology Co., Limited | Private company limited by shares | Live |
| WEALTH INFORMATION LIMITED | Private company limited by shares | Live |
| YIXI WEALTH (CHINA) FINANCE INFORMATION SERVICES LIMITED | Private company limited by shares | Live |
| WEIGU INFORMATION (CHINA) CO., LIMITED | Private company limited by shares | Live |
| HK WEIHANG INFORMATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| WEITENG INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| WELLFIT INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| WELTON INFORMATION LIMITED | Private company limited by shares | Dissolved |
| Shanghai Wende Information Technology Co., Limited | Private company limited by shares | Live |
| Shanghai WERCAN Information Technology Co., Limited | Private company limited by shares | Live |
| WESTERN NETWORK INFORMATION LIMITED | Private company limited by shares | Dissolved |
| Wetwo Information Technology Co. Limited | Private company limited by shares | Live |
| Whynot Information Technology Limited | Private company limited by shares | Live |
| Wiangle Information Technology Limited | | Live |
| Wind Information (HK) Company Limited | Private company limited by shares | Live |
| WINFAN INFORMATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| WINLA INFORMATION TECHNOLOGY CO., LIMITED | | Live |
| WINNER SPORTS INFORMATION LIMITED | Private company limited by shares | Live |
| WINNER INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WINTEK Information Co., Limited | Private company limited by shares | Live |
| WINVIEW INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Wire & Cable Information Research Limited | Private company limited by shares | Live |
| WISERS INFORMATION LIMITED | Private company limited by shares | Live |
| WITECH INFORMATION LIMITED | Private company limited by shares | Live |
| WITSMART INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Wonderful Information Science & Technology Co., Limited | Private company limited by shares | Live |
| WONDERS INFORMATION LIMITED | Private company limited by shares | Dissolved |
| Information Works Co., Limited | Private company limited by shares | Live |
| T CYBER WORKS INFORMATION TECHNOLOGY CORPORATION LIMITED | Private company limited by shares | Dissolved |
| HONG KONG WORLD INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WORLD WIDE WEB NEWS & INFORMATION CO., LIMITED | Private company limited by shares | Dissolved |
| Worldconnect Information Technology Company Limited | Private company limited by shares | Live |
| WORLDLOOP INFORMATION LIMITED | Private company limited by shares | Live |
| WSIG Information Technology Limited | Private company limited by shares | Live |
| Wudao Information System Company Limited | Private company limited by shares | Live |
| WUWEI INFORMATION MEDIA LIMITED | Private company limited by shares | Live |