| Zhonghua Guoxue Research Institute Limited | Private company limited by shares | Live |
| ZHONGHUA TONGREN BONE INJURIES INSTITUTE LIMITED | Private company limited by shares | Live |
| HK ZHONGMEI ARCHITECTURAL ORNAMENT RESEARCH INSTITUTE LIMITED | Private company limited by shares | Live |
| ZHONGMEIOUYA INSTITUTE OF SCIENCE AND TECHNOLOGY CO., LIMITED | | Live |
| China ZhongMou Environmental Art Research Institute Limited | Private company limited by shares | Live |
| HK ZHONGXIN FINANCE RESEARCH INSTITUTE CO., LIMITED | Private company limited by shares | Live |
| ZHONGYI INTERNATIONAL (HK) MANAGEMENT INSTITUTE LIMITED | Private company limited by shares | Live |
| CHINA ZHONGYI AGRICULTURAL RESEARCH INSTITUTE LIMITED | Private company limited by shares | Live |
| GUOXUE ZHOUYI (CHINA) INSTITUTE LIMITED | Private company limited by shares | Live |
| CHINA ZHOUYI RESEARCH INSTITUTE COMPANY LIMITED | Private company limited by shares | Live |
| CHINESE WOMEN ZHUANXIU INSTITUTE LIMITED | Private company limited by shares | Live |
| ZIBS Institute HK Limited | | Live |
| ZOJE INSTITUTE OF TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HUYILONG CHAN ZONG INSTITUTE OF FINE ART LIMITED | Private company limited by shares | Live |
| CHINESE ZTYX INSTITUTE CO., LIMITED | Private company limited by shares | Live |
| CHINA YOUTHS CAREER PLANNING RESEARCH INSTITUTECO., LIMITED | Private company limited by shares | Live |
| CHINA ZHONG YI NON DRUG THERAPY RESEARCH INSTITUTECO., LIMITED | Private company limited by shares | Live |
| INSTITUTES FOR ADVANCED RESEARCH LIMITED | Private company limited by shares | Dissolved |
| TG ASIAN INSTITUTES LIMITED | Private company limited by shares | Live |
| CHINA INSTITUTES OF NUTRITION-MEDICINAL COMPANY LIMITED | Private company limited by shares | Live |
| ELITE BUSINESS INSTITUTES LIMITED | Private company limited by shares | Live |
| PolyU Translational Research Institutes Limited | | Live |
| HK EASTERN ZEN DRAW INSTITUTEY LIMITED | Private company limited by shares | Dissolved |
| KEI TAK INSTITUTION OF OLD AGE LIMITED | Private company limited by shares | Live |
| KAI YAN INSTITUTION OF OLD AGE LIMITED | Private company limited by shares | Live |
| INSTITUTION LIMITED -THE- | Private company limited by shares | Live Commenced dormancy on 18-Dec-2012 |
| PFP Institution Limited | Private company limited by shares | Live |
| Tao Institution Limited | Private company limited by shares | Live |
| CCD Institution Limited | Company limited by guarantee | Live |
| Asia Art Institution Limited | Private company limited by shares | Live |
| BILLIONS INSTITUTION LIMITED | | Live |
| Asia Pacific Blockchain Research Institution Limited | Private company limited by shares | Live |
| China Community Service Research Institution Limited | Private company limited by shares | Live |
| CHINESE SINOLOGY RESEARCH INSTITUTION CO., LIMITED | Private company limited by shares | Live |
| PHOENIX CONTEMPORARY ART CREATIVE INSTITUTION LIMITED | Private company limited by shares | Live |
| New Dragon Institution Limited | Private company limited by shares | Live |
| Creative Institution Holding Company Limited | Private company limited by shares | Live |
| KAI YAN INSTITUTION OF OLD AGE ( YUEN LONG ) LIMITED | Private company limited by shares | Live |
| The Pacific Institution Limited | | Live |
| Smart Institution Limited | | Live |
| YIMALUILI INSTITUTION LIMITED | Company limited by guarantee | Live |
| Institutional Capital Advisory Limited | Private company limited by shares | Live |
| Creative Institutional Catering Limited | Private company limited by shares | Dissolved |
| CHINA INSTITUTIONAL INVESTORS CENTER CO., LIMITED | Private company limited by shares | Dissolved |
| Institutional Capital Connect Limited | Private company limited by shares | Live |
| INSTITUTIONAL MANAGEMENT CONSULTANTS, LIMITED | Private company limited by shares | Dissolved |
| FRANKLIN TEMPLETON INSTITUTIONAL ASIA LIMITED | Private company limited by shares | Dissolved |
| GLOBAL INSTITUTIONAL FUND SERVICE LIMITED | Private company limited by shares | Dissolved |
| INSTITUTIONAL FUNDS ADVISORS LIMITED | Private company limited by shares | Dissolved |
| Global Institutional Solutions, Limited | Private company limited by shares | Dissolved |
| GUANGDONG-HONG KONG-MARCO INSTITUTIONAL TRADING MARKET LIMITED | Private company limited by shares | Live |
| ISC - INSTITUTIONAL SERVICE CENTRE H.K. LIMITED | Private company limited by shares | Dissolved |
| International MCN Institutional Alliance Co., Limited | | Live |
| INTERNATIONAL INSTITUTIONAL INVESTORS CLUB LIMITED | Private company limited by shares | Dissolved |
| INSTITUTIONAL INVESTOR (ASIA) LIMITED | Private company limited by shares | Dissolved |
| INSTITUTIONAL LIQUIDITY LIMITED | Private company limited by shares | Live |
| CHINA MEDICAL RESEARCH ETHICS INSTITUTIONAL REVIEW BOARD LIMITED | Private company limited by shares | Live |
| INSTITUTIONAL INVESTMENT GROUP (ASIA PACIFIC) LIMITED | Private company limited by shares | Live |
| PROFESSIONAL INSTITUTIONAL CATERING LIMITED | Private company limited by shares | Live |
| INSTITUTIONAL SERVICES (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| INSTITUTIONAL SERVICES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Institutional Shareholder Services (Hong Kong) Limited | Private company limited by shares | Live |
| INSTITUTIONAL INVESTORS SERVICES CO. LIMITED | Private company limited by shares | Dissolved |
| Millennium Institutional Services (Asia) Limited | Private company limited by shares | Live |
| HSBC INSTITUTIONAL TRUST SERVICES (ASIA) LIMITED | Public company limited by shares | Live |
| HAINING INSTITUTIONAL TEXTILE CO., LIMITED | Private company limited by shares | Live |
| INSTITUTO LIMITED | Private company limited by shares | Live |
| Instituto Biblico Hosanna Limited | | Live |
| INSTKELE LIMITED | | Live |
| INSTOCK LIMITED | Private company limited by shares | Dissolved |
| INSTOCKING LIMITED | Private company limited by shares | Live |
| Instocks (HK) E-commerce Limited | Private company limited by shares | Live |
| INSTONE COMPANY LIMITED | Private company limited by shares | Dissolved |
| INSTONE TRADING LIMITED | Private company limited by shares | Dissolved |
| INSTOR HK EQUIPMENT LIMITED | Private company limited by shares | Live |
| HK INSTORESCREEN CO., LIMITED | Private company limited by shares | Live |
| INSTORY GROUP LIMITED | Private company limited by shares | Live |
| HK FROM INSTOS TRADING CO., LIMITED | Private company limited by shares | Live |
| INSTPOWER Co., Limited | Private company limited by shares | Live |
| Instra Investments Limited | Private company limited by shares | Live |
| Instrade Company Limited | Private company limited by shares | Live |
| MYWAY INSTRIAL CO., LIMITED | Private company limited by shares | Live |
| INSTROMET CHINA CO., LIMITED | Private company limited by shares | Dissolved |
| INSTRONG COMPANY LIMITED | Private company limited by shares | Dissolved |
| INSTRONG INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| INSTRUCTIONAL DESIGN TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| INSTRUCTIONAL SYSTEMS LIMITED | Private company limited by shares | Live Commenced dormancy on 14-Apr-2014 |
| Instructor Limited | Private company limited by shares | Live |
| China Systemic Constellations Instructor Association Limited | Private company limited by shares | Live |
| KOWLOON MOTOR DRIVING INSTRUCTORS' ASSOCIATION LIMITED | Company limited by guarantee | Live |
| CANOE INSTRUCTORS LIMITED - THE - | Private company limited by shares | Dissolved |
| ASSOCIATION OF FORKTRUCK INSTRUCTORS LIMITED | Company limited by guarantee | Dissolved |
| SF INSTRUEMNT CO., LIMITED | Private company limited by shares | Live |
| INSTRUMAN INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| Instrumatic Hkong Corporation Limited | Private company limited by shares | Live |
| LE CEL INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| IRK INSTRUMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| A & P INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| AME INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| M & Q INSTRUMENT COMPANY LIMITED | Private company limited by shares | Dissolved |