| Cathay Harvest Marine Limited | | Live |
| Cathay New Sea Maritime Limited | | Live |
| CATHAY BULLION MARKETING SERVICES LIMITED | Private company limited by shares | Dissolved |
| CATHAY MARKETING SERVICES LIMITED | Private company limited by shares | Dissolved |
| CATHAY ADVANCED MATERIALS LIMITED | Private company limited by shares | Live |
| Cathay Media Group (Hong Kong) Limited | Private company limited by shares | Live |
| CATHAY HYPER MEDIA GROUP LIMITED | Private company limited by shares | Dissolved |
| Cathay Medical Alliance Limited | Private company limited by shares | Live |
| Cathay Medical Co., Limited | Private company limited by shares | Live |
| CATHAY MEDICINE (1946) COMPANY, LIMITED | Private company limited by shares | Dissolved |
| CATHAY MERCANTILE, LIMITED | Private company limited by shares | Dissolved |
| CATHAY TAT MING METAL MANUFACTORY LIMITED | Private company limited by shares | Live |
| CATHAY NANO MICROSPHERE LIMITED | Private company limited by shares | Dissolved |
| CATHAY METALS AND MINERALS LIMITED | Private company limited by shares | Live |
| CATHAY NICHROM MINING LIMITED | Private company limited by shares | Dissolved |
| CATHAY MOTION PICTURE STUDIOS LIMITED | Private company limited by shares | Live |
| MOUNT CATHAY LIMITED | Private company limited by shares | Live |
| NATIONAL CATHAY LIMITED | Private company limited by shares | Dissolved |
| Cathay Natural Beautique Company Limited | Private company limited by shares | Live |
| CATHAY OLYMPIC INVESTMENTS LIMITED | Private company limited by shares | Live |
| CATHAY OPTICAL ASIA LIMITED | Private company limited by shares | Live |
| CATHAY OVERSEAS CO. LIMITED | Private company limited by shares | Dissolved |
| CATHAY MERCANTILE (OVERSEAS) LIMITED | Private company limited by shares | Dissolved |
| CATHAY OVERSEAS SUPPLY LIMITED | Private company limited by shares | Dissolved |
| CATHAY OVERSEAS TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PACIFIC AIRWAYS LIMITED | Public company limited by shares | Live |
| CATHAY PAPER PRODUCTS FACTORY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PARTNERS LIMITED | | Live |
| Cathay Capital Partners Limited | Private company limited by shares | Live |
| HONG KONG CATHAY PATENT AND TRADEMARK COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PENCIL COMPANY, LIMITED | Private company limited by shares | Dissolved |
| CATHAY PETROCHEM LIMITED | Private company limited by shares | Dissolved |
| CATHAY PHARMACEUTICALS AND CHEMICALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PHOTO COMPANY LIMITED | Private company limited by shares | Live |
| Cathay Photonics Limited | Private company limited by shares | Live |
| CATHAY (PIECE GOODS) COMPANY, LIMITED | Private company limited by shares | Dissolved |
| PIONEER CATHAY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PLATINUM RESOURCE CAPITAL LIMITED | Private company limited by shares | Dissolved |
| CATHAY POWER LIMITED | Private company limited by shares | Dissolved |
| CATHAY PRESS LIMITED | Private company limited by shares | Dissolved |
| CATHAY METAL PRESSWORKS, LIMITED -THE- | Private company limited by shares | Dissolved |
| HK CATHAY PRINCEPS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CATHAY FILM PRODUCTIONS LIMITED | Private company limited by shares | Dissolved |
| CATHAY PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| CATHAY ATLANTIC PRODUCTS LIMITED | Private company limited by shares | Live |
| Cathay Safety Products Limited | Private company limited by shares | Live |
| CATHAY PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| CATHAY PROPERTY LIMITED | Private company limited by shares | Dissolved |
| CATHAY PROPERTY AGENCY LIMITED | Private company limited by shares | Live |
| CATHAY REALTY & PROPERTY LIMITED | Private company limited by shares | Dissolved |
| Cathay Prosperity Maritime Limited | | Live |
| CATHAY PUBLISHERS LIMITED | Private company limited by shares | Live |
| CATHAY PUBLISHING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY QUINOA INTERNATIONAL HOLDING GROUP LIMITED | Private company limited by shares | Live |
| CATHAY RAINBOW DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Cathay Rankealth Group Co., Limited | Private company limited by shares | Live |
| CATHAY REAL ESTATE DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY GOLD REFINERY CORPORATION LIMITED | Private company limited by shares | Live |
| CATHAY REGAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CATHAY MOTOR REPAIR COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY RESOURCES LIMITED | Private company limited by shares | Dissolved |
| Cathay Resources Reserve Limited | Private company limited by shares | Live |
| CATHAY RESTAURANT COMPANY LIMITED | Private company limited by shares | Dissolved |
| CATHAY RICH LIMITED | Private company limited by shares | Dissolved |
| Cathay Clean Science And Technology Co., Limited | Private company limited by shares | Live |
| CATHAY SECURITIES LIMITED | Private company limited by shares | Dissolved |
| CATHAY SECURITIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| GRAND CATHAY SECURITIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| CATHAY SECURITY LIMITED | Private company limited by shares | Dissolved |
| CATHAY SEMICONDUCTOR LIGHTING INDUSTRY INC LIMITED | Private company limited by shares | Live |
| CATHAY TRADE SERVICES, ASIA LIMITED | Private company limited by shares | Dissolved |
| CATHAY CONSULTING SERVICES CO., LIMITED | Private company limited by shares | Live |
| CATHAY EXPLORATION SERVICES LIMITED | Private company limited by shares | Dissolved |
| CATHAY PACIFIC CATERING SERVICES (H.K.) LIMITED | Private company limited by shares | Live |
| CATHAY GENERAL SERVICES (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| CATHAY FILM SERVICES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| CATHAY INDUSTRIAL SERVICES (HK) LIMITED | Private company limited by shares | Dissolved |
| CATHAY INSURANCE SERVICES LIMITED | Private company limited by shares | Live |
| CATHAY PACIFIC SERVICES LIMITED | Private company limited by shares | Live |
| CATHAY CHI SHING METAL MANUFACTORY LIMITED | Private company limited by shares | Live |
| SHUI SHING CATHAY LIMITED | Private company limited by shares | Dissolved |
| CATHAY SHOES MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| SINO CATHAY HOLDING CO., LIMITED | Private company limited by shares | Live |
| CATHAY SOLUTIONS LIMITED | Private company limited by shares | Live |
| CATHAY SOURCE (HK) LIMITED | Private company limited by shares | Live |
| Cathay Sources Limited | Private company limited by shares | Live |
| CATHAY SOURCING PRIVATE LIMITED | Private company limited by shares | Live |
| SOUTH CATHAY LIMITED | Private company limited by shares | Dissolved |
| CATHAY AND SPIRITUAL CO., LIMITED | Private company limited by shares | Dissolved |
| CATHAY STANDARD LIMITED | Private company limited by shares | Dissolved |
| Cathay Star Limited | Private company limited by shares | Live |
| Cathay Capital Strategies Limited | Private company limited by shares | Live |
| CATHAY SUCCESS LIMITED | Private company limited by shares | Dissolved |
| Cathay Sunrise Limited | Private company limited by shares | Live |
| CATHAY SUPERENCE (HK) LIMITED | Private company limited by shares | Dissolved |
| CATHAY SWAN LIMITED | Private company limited by shares | Live |
| CATHAY SYNDICATE LIMITED | Private company limited by shares | Dissolved |
| CATHAY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Cathay System Limited | Private company limited by shares | Live |
| CATHAY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |