| CD ORTHODONTICS LIMITED | Private company limited by shares | Live |
| CENTRAL ORTHODONTICS LIMITED | Private company limited by shares | Live |
| INTERNATIONAL ASSOCIATION FOR ORTHODONTICS HONG KONG STUDY CLUB LIMITED | Company limited by guarantee | Dissolved |
| HONG KONG ASSOCIATION OF ALIGNER ORTHODONTICS LIMITED | Private company limited by shares | Live |
| Orthodontics Asia (Hong Kong) Limited | Private company limited by shares | Live |
| PACIFIC ORTHODONTICS LIMITED | Private company limited by shares | Dissolved |
| TaSK Orthodontics Limited | Private company limited by shares | Live |