| HORIZONTAL GHP LIMITED | Private company limited by shares | Live |
| Horizontal HK Limited | | Live |
| Horizontal Alliance Limited | Private company limited by shares | Live |
| Horizontal Co., Limited | Private company limited by shares | Live |
| VERTICAL HORIZONTAL CO., LIMITED | Private company limited by shares | Live |
| VERTICAL HORIZONTAL CO., LIMITED | | Live |
| HORIZONTAL COMMA CREATION LIMITED | Private company limited by shares | Dissolved |
| HORIZONTAL SPACE DESIGN COMPANY LIMITED | Private company limited by shares | Live |
| NEW HORIZONTAL ONLINE TRAINING & EDUCATION CO., LIMITED | Private company limited by shares | Dissolved |
| Horizontal Enterprise Limited | Private company limited by shares | Live |
| Horizontal Holding Limited -The- | Private company limited by shares | Live |
| Ocean Horizontal Holding Company Limited | Private company limited by shares | Live |
| HORIZONTAL (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| HORIZONTAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HORIZONTAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| Horizontal Plane Co., Limited | | Live |
| HORIZONTAL COMMA PRODUCTION LIMITED | Private company limited by shares | Live |
| HORIZONTAL RISE LIMITED | Private company limited by shares | Dissolved |
| RISE HORIZONTAL LIMITED | Private company limited by shares | Dissolved |
| Vertical & Horizontal Technology Limited | Private company limited by shares | Live |
| Horizontal Vertical Limited | Private company limited by shares | Dissolved |