| CATHAY LIMITED | Private company limited by shares | Live |
| CATHAY WAY LIMITED | Private company limited by shares | Dissolved |
| A CATHAY COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY 71 LIMITED | Private company limited by shares | Live |
| MAX CATHAY LIMITED | Private company limited by shares | Dissolved |
| Cathay Sun Limited | Private company limited by shares | Live |
| Res Cathay Limited | Private company limited by shares | Live |
| CATHAY TAG LIMITED | Private company limited by shares | Live |
| NEW CATHAY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Cathay Era Limited | Private company limited by shares | Live |
| HK Cathay Company Limited | Private company limited by shares | Live |
| CATHAY ORGANISATION (HONG KONG) (1965) LIMITED | Private company limited by shares | Dissolved |
| Cathay Academic Exchange Limited | Private company limited by shares | Live |
| Cathay Financial Academy Limited | Private company limited by shares | Live |
| CATHAY ACADEMY OF LIFE SCIENCES LIMITED | Private company limited by shares | Live |
| Cathay Advance Software Limited | Private company limited by shares | Live |
| CATHAY INSURANCE ADVISORS LIMITED | Private company limited by shares | Live |
| Cathay Advisory Limited | Private company limited by shares | Live |
| Cathay Business Advisory Limited | Private company limited by shares | Live |
| Century Cathay Advisory (Hong Kong) Limited | Private company limited by shares | Live |
| CATHAY PACIFIC AERO LIMITED | Private company limited by shares | Live |
| Cathay Aero Solutions Limited | Private company limited by shares | Live |
| CATHAY AERONAUTICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CATHAY AGENCY LIMITED | Private company limited by shares | Dissolved |
| CATHAY INSURANCE AGENCY LIMITED | Private company limited by shares | Live |
| CATHAY PROPERTIES AGENCY LIMITED | Private company limited by shares | Dissolved |
| CATHAY AGROTECHNIQUE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CATHAY A.I. ROBOTICS CORPORATION LIMITED -THE- | Private company limited by shares | Live |
| CATHAY PACIFIC AIRCRAFT LEASE FINANCE LIMITED | Private company limited by shares | Live |
| CATHAY PACIFIC AIRCRAFT TRADING LIMITED | Private company limited by shares | Dissolved |
| Cathay Allied Company Limited | Private company limited by shares | Live |
| CATHAY AMERICA STANDARD TRADING LIMITED | Private company limited by shares | Dissolved |
| CATHAY AMERICAN LIMITED | Private company limited by shares | Dissolved |
| CATHAY AMERICAN LIMITED | Private company limited by shares | Live |
| CATHAY ANCHOR LIMITED | Private company limited by shares | Live |
| Cathay Antlantic Limited | Private company limited by shares | Live |
| Cathay Aquatic Co., Limited | | Live |
| CATHAY ARMS LIMITED | Private company limited by shares | Dissolved |
| CATHAY AROMATIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY ARTS COMPANY, LIMITED | Private company limited by shares | Dissolved |
| CATHAY ARTS COMPANY LIMITED | 擔保有限公司 | Live |
| Cathay Arts Gallery Limited | Private company limited by shares | Live |
| CATHAY ASIA LIMITED | Private company limited by shares | Dissolved |
| Cathay Capital (Asia) Limited | Private company limited by shares | Live |
| CATHAY ASSOCIATES LIMITED | Private company limited by shares | Live |
| Cathay Atlantic Shipbuilding Limited | Private company limited by shares | Dissolved |
| CATHAY AUSTRALIA MINERALS PTY LIMITED | Private company limited by shares | Live |
| CATHAY AUTO REFINISHING LIMITED | Private company limited by shares | Dissolved |
| CATHAY AUTO SALES COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY AUTO TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Cathay Toys & Bags LDA Limited | Private company limited by shares | Live |
| CATHAY BANCORP LIMITED | Private company limited by shares | Dissolved |
| Cathay Bear Cat Limited | Private company limited by shares | Live |
| CATHAY BEST LIMITED | Private company limited by shares | Live |
| CATHAY BIOTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY INDUSTRIAL BIOTECH (HONG KONG) LIMITED | Private company limited by shares | Live |
| Cathay Commodity Brokers Limited | Private company limited by shares | Live |
| CATHAY BUILDER'S CENTER, LIMITED | Private company limited by shares | Dissolved |
| CATHAY BUILDING MATERIAL SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| CATHAY BUILDING MATERIALS LIMITED | Private company limited by shares | Dissolved |
| Cathay Carbon Assets Limited | Private company limited by shares | Live |
| CATHAY PACIFIC CHINA CARGO HOLDINGS LIMITED | Private company limited by shares | Live |
| Cathay Carib Trading Company Limited | Private company limited by shares | Live |
| CATHAY CARPET COMPANY LIMITED | Private company limited by shares | Dissolved |
| Caviar de Cathay Limited | Private company limited by shares | Dissolved |
| CENTRAL CATHAY LIMITED | Private company limited by shares | Dissolved |
| CENTRAL CATHAY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CATHAY CERAMIC LIMITED | Private company limited by shares | Live |
| CATHAY CERAMIC MACHINERY COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY CHAMPION LIMITED | Private company limited by shares | Dissolved |
| CATHAY CHEMICALS LIMITED | Private company limited by shares | Dissolved |
| CATHAY CHEMPRODUCT LIMITED | | Live |
| CATHAY CHINA ENTERPRISES LIMITED | Private company limited by shares | Live |
| CATHAY CHINE-PAX LIMITED | Private company limited by shares | Dissolved |
| CATHAY CINDIC J-V LIMITED | Private company limited by shares | Dissolved |
| CATHAY CITY LIMITED | Private company limited by shares | Dissolved |
| CATHAY CITY INVESTMENTS LIMITED | Private company limited by shares | Live |
| CATHAY MUSIC CLUB LIMITED | Company limited by guarantee | Dissolved |
| Cathay Beauty Co., LIMITED | Private company limited by shares | Live |
| CATHAY BIOLIGHT CO., LIMITED | Private company limited by shares | Dissolved |
| CATHAY HONEST (CHT) CO., LIMITED | Private company limited by shares | Live |
| Cathay Liftech Co., Limited | Private company limited by shares | Live |
| Xiamen Cathay Stone Co., Limited | | Live |
| CATHAY CLEAN TECHNOLOGY SHARES CO., LIMITED | Private company limited by shares | Live |
| CATHAY TELECOMMUNICATIONS CO., LIMITED | Private company limited by shares | Live |
| CATHAY TRADE CO., LIMITED | Private company limited by shares | Live |
| HK CATHAY TRADING CO., LIMITED | Private company limited by shares | Live |
| CATHAY PACIFIC AIR TRANSPORT CO., LIMITED | | Live |
| Jiang Xi Coal Cathay China Holding Limited | Private company limited by shares | Dissolved |
| CATHAY COLD STORAGE COMPANY, LIMITED -THE- | Company limited by guarantee | Dissolved |
| CATHAY COLORS & PIGMENTS LIMITED | Private company limited by shares | Live |
| Cathay Commercial Insurance Limited | Private company limited by shares | Live |
| CATHAY COMMODITIES LIMITED | Private company limited by shares | Dissolved |
| Cathay Commodities Limited | Private company limited by shares | Live |
| CATHAY COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| CATHAY / COMMUNICATION CONSULTING LIMITED | Private company limited by shares | Live |
| CALEDONIAN CATHAY COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| CATHAY COMMUNICATIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CATHAY COMPUTER LIMITED | Private company limited by shares | Dissolved |
| CATHAY CONCEPT LIMITED | Private company limited by shares | Dissolved |