| Hypharma Co., Limited | Private company limited by shares | Live |
| Hyphecan Care Limited | Private company limited by shares | Live |
| Hyphegesis Limited | Private company limited by shares | Live |
| HYPHEN LIMITED | Private company limited by shares | Dissolved |
| HYPHEN ASIA LIMITED | Private company limited by shares | Live |
| HYPHEN CAPITAL LIMITED | Private company limited by shares | Dissolved |
| HYPHEN CHEMICALS LIMITED | Private company limited by shares | Live |
| Hyphen Connect Limited | | Live |
| Hyphen Consulting Limited | Private company limited by shares | Live |
| Hyphen Education HK Limited | Private company limited by shares | Live |
| Hyphen Asia (Hong Kong) Limited | Private company limited by shares | Live |
| Hyphen Networks Limited | Private company limited by shares | Live |
| HYPHEN ASIA TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Hyphenea HK Limited | Private company limited by shares | Live |
| HYPHENS MARKETING & TECHNICAL SERVICES LIMITED | Private company limited by shares | Dissolved |
| HYPHIL SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |