| Obsesseder Limited | | Live |
| Obsession Spa Limited | Private company limited by shares | Live |
| Magnificent Obsession Limited | Private company limited by shares | Live |
| SOCKS OBSESSION LIMITED | Private company limited by shares | Live |
| OBSESSIONS IN TIME LIMITED | Private company limited by shares | Dissolved |
| OBSESSPLANET HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| OBSETECH Limited | Private company limited by shares | Live |
| Obsevo Innovation Company Limited | Private company limited by shares | Live |
| OBSIDEO LIMITED | Private company limited by shares | Live |
| OBSIDIAN LIMITED | Private company limited by shares | Dissolved |
| OBSIDIAN HK LIMITED | Private company limited by shares | Live |
| OBSIDIAN SUN LIMITED | Private company limited by shares | Live |
| Obsidian Company Limited | Private company limited by shares | Live |
| Ocean Obsidian Limited | | Live |
| OBSIDIANA INVESTMENTS LIMITED | Private company limited by shares | Live |
| Obsidiants Assets Limited | Private company limited by shares | Live |
| OBSINN LIMITED | Private company limited by shares | Live |
| OBSIS LIMITED | Private company limited by shares | Dissolved |
| OBSN Group Holding Limited | | Live |
| OBSPACE Architectural Design Co., LIMITED | Private company limited by shares | Live |
| OBSSUO LIMITED | | Live |
| Obstacle Design and Set Up Limited | | Live |
| GOLD OBSTINA LIMITED | Private company limited by shares | Live |
| HK XK INTERNATIONAL DEFECATE OBSTRUCT RESEARCH CENTER LIMITED | Private company limited by shares | Dissolved |
| Obsydian Limited | Private company limited by shares | Live |
| OBTAIN ACE LIMITED | Private company limited by shares | Live |
| OBTAIN WEALTH LIMITED | Private company limited by shares | Live |
| OBTAINEW LIMITED | Private company limited by shares | Dissolved |
| Obtainium Limited | Private company limited by shares | Live |
| OBTALA LIMITED | Private company limited by shares | Live |
| OBTIC INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OBTON LIMITED | Private company limited by shares | Live |
| OBUMA COMPANY LIMITED | Private company limited by shares | Dissolved |
| Obut (HK) International Trading Limited | Private company limited by shares | Dissolved |
| Obutto Limited | Private company limited by shares | Live |
| OBUYZ NETWORK LIMITED | Private company limited by shares | Dissolved |
| OBVIO YIP COMPANY LIMITED | Private company limited by shares | Live |
| OBVIO SUN COMPANY LIMITED | Private company limited by shares | Dissolved |
| OBVIO NEW COMPANY LIMITED | Private company limited by shares | Dissolved |
| OBVIOUS COMPANY LIMITED | Private company limited by shares | Dissolved |
| OBVIOUSCN LIMITED | Private company limited by shares | Live |
| Obvius Limited | Private company limited by shares | Live |
| O.B.Z. Investments Limited | Private company limited by shares | Live |