| 3-Colors Fine Technology (Hong Kong) Company Limited | Private company limited by shares | Live |
| 3COM ASIA LIMITED | Private company limited by shares | Live |
| 3COM CHINA LIMITED | Private company limited by shares | Dissolved |
| 3COM ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| 3COMMA LIMITED | | Live |
| 3-CON ELECTRONICS LIMITED | Private company limited by shares | Live |
| 3CONNECTS LIMITED | Private company limited by shares | Dissolved |
| 3-CONS (HONG KONG) TRADING LIMITED | Private company limited by shares | Dissolved |
| 3COPTICS CO., LIMITED | Private company limited by shares | Live |
| 3CORNER LIMITED | Private company limited by shares | Dissolved |
| 3cott Limited | Private company limited by shares | Live |