| HYDA CONSULTANCY LIMITED | Private company limited by shares | Live |
| HYDA GEMS LIMITED | Private company limited by shares | Live |
| HYDA HONGKONG LIMITED | Private company limited by shares | Live |
| QINGDAO HYDA INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HYDA INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| HYDA TRADE LIMITED | | Live |
| ZHEJIANG HYDA VALVE COMPANY LIMITED | Private company limited by shares | Live |
| HYDAA TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HYDAA INTERNATIONAL CO LIMITED | Private company limited by shares | Live |
| HYDAC TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG HYDAI ARCHITECTS LIMITED | Private company limited by shares | Live |
| Hydart Power Engineering Company Limited | Private company limited by shares | Live |
| HYDD LIMITED | | Live |
| NEW HYDE COMPANY LIMITED | Private company limited by shares | Live |
| HYDE COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYDE LIMITED | Private company limited by shares | Live |
| HYDE WIN LIMITED | Private company limited by shares | Live |
| HYDE WAY LIMITED | Private company limited by shares | Dissolved |
| HYDE ONE LIMITED | Private company limited by shares | Live |
| Hyde st. Limited | | Live |
| ANHUI HYDE GROUP CO., LIMITED | Private company limited by shares | Live |
| HYDE BEST LIMITED | Private company limited by shares | Live |
| HYDE CENTRE LIMITED | Private company limited by shares | Dissolved |
| China Ruxin Hyde Group Co., Limited | | Live |
| HYDE ENTERPRISES LIMITED | Private company limited by shares | Live |
| Esta Hyde Limited | | Live |
| HYDE FINANCE LIMITED | Private company limited by shares | Dissolved |
| HYDE FORD LIMITED | Private company limited by shares | Dissolved |
| Hyde Innovation Limited | | Live |
| HYDE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HYDE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| HYDE SHIPMANAGEMENT LIMITED | | Live |
| HYDE SHIPPING LIMITED | | Live |
| HYDEE DESIGN LIMITED | Private company limited by shares | Dissolved |
| HYDEE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Hydee International Limited | Private company limited by shares | Live |
| HYDEFIELD LIMITED | Private company limited by shares | Dissolved |
| HYDEGATE REALTY LIMITED | Private company limited by shares | Dissolved |
| Hyde-Group International Trade Co., Limited | | Live |
| HYDEL OVERSEAS (HONG KONG) LIMITED | Private company limited by shares | Live |
| Hydeland Limited | Private company limited by shares | Live |
| HONG KONG HYDE-LUDE FERTILISERS LIMITED | Private company limited by shares | Dissolved |
| Hydensky Group Limited | Private company limited by shares | Live |
| Hydepark International Limited | Private company limited by shares | Live |
| HYDER COMPANY LIMITED | Private company limited by shares | Live |
| HYDERA MACHINERY LIMITED | Private company limited by shares | Dissolved |
| HYDERAT LIMITED | Private company limited by shares | Dissolved |
| Hydesin International Trading Co., Limited | Private company limited by shares | Live |
| HYDE-TREND ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HYDETZ ELEVATOR CO., LIMITED | Private company limited by shares | Live |
| HYDEVALE LIMITED | Private company limited by shares | Dissolved |
| HYDHK Limited | | Live |
| Hydi Ainuo International Development Co., Limited | Private company limited by shares | Live |
| HYDIA PEARL LIMITED | Private company limited by shares | Live |
| HYDIS LIMITED | Private company limited by shares | Dissolved |
| HYDIX LIMITED | Private company limited by shares | Live |
| HYDK ASSET MANAGEMENT LIMITED | Private company limited by shares | Live |
| HYDLAN COMPANY LIMITED | | Live |
| Hyd-mass Company Limited | Private company limited by shares | Live |
| Hydos Castle Company Limited | Private company limited by shares | Live |
| NORWAY HYDO-SHIP INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYDRA LIMITED | Private company limited by shares | Dissolved |
| Hydra Limited | Private company limited by shares | Live |
| HYDRA COMPANY LIMITED | Private company limited by shares | Live |
| Hydra Advisors Limited | Private company limited by shares | Live |
| HYDRA BIOTECH LIMITED | Private company limited by shares | Live |
| HYDRA IMP & EXP CO., (H.K.) LIMITED | Private company limited by shares | Live |
| Hydra Concept Group Limited | Private company limited by shares | Live |
| HYDRA CONSULTING LIMITED | Private company limited by shares | Live |
| Hydra Corp. Limited | Private company limited by shares | Live |
| Hydra Corporation Limited | Private company limited by shares | Dissolved |
| Hydra Game Limited | Private company limited by shares | Live |
| HYDRA GROUP LIMITED | Private company limited by shares | Live |
| Hydra (HK) Limited | Private company limited by shares | Dissolved |
| Hydra Biotech (HK) Limited | | Live |
| HYDRA MERCANTILE HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HYDRA TECH HONG KONG, LIMITED | Private company limited by shares | Live |
| HYDRA HOUSE LIMITED | Private company limited by shares | Dissolved |
| HYDRA INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HYDRA INDUSTRIAL INVESTMENT LIMITED | Private company limited by shares | Live |
| Hydra International Limited | Private company limited by shares | Dissolved |
| Hydra Internet Limited | Private company limited by shares | Live |
| HYDRA INVEST LIMITED | Private company limited by shares | Live |
| HYDRA JEWELLERY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hydra Talent Management Systems Limited | Private company limited by shares | Live |
| Hydra Manila Limited | Private company limited by shares | Live |
| Hydra & Co. Asia Pacific Limited | Private company limited by shares | Live |
| HYDRA QUEST INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HYDRA RESOURCES LIMITED | Private company limited by shares | Dissolved |
| Hydra Shipping Company Limited | Private company limited by shares | Dissolved |
| HYDRA SPORTS LIMITED | Private company limited by shares | Dissolved |
| HK Hydra Culture Sports Limited | Private company limited by shares | Live |
| ACC HYDRA TECH LIMITED | Private company limited by shares | Live |
| Hydra Technology Limited | Private company limited by shares | Live |
| HYDRA TECHNOLOGY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HYDRA TITAN ASIA (HK) LIMITED | Private company limited by shares | Dissolved |
| HYDRA WORLD TRADE LIMITED | Private company limited by shares | Live |
| HYDRA GENERAL TRADING LIMITED | | Live |
| HYDRA WORKSHOP LIMITED | Private company limited by shares | Live |
| HYDRABEND (ASIA PACIFIC) LIMITED | Private company limited by shares | Dissolved |