| KNOCK LIMITED | | Live |
| Knock Knock Bookstore Limited | | Live |
| CLICK KNOCK LIMITED | Private company limited by shares | Live |
| KNOCK COSMETICS COMPANY LIMITED | Private company limited by shares | Live |
| Knock Knock Creative Co Limited | Private company limited by shares | Live |
| Knock Knock Design Limited | | Live |
| Knock at the door Limited | Private company limited by shares | Live |
| Dream Knock Entertainment Holding Limited | Private company limited by shares | Live |
| Knock Global Investment Co. Limited | Private company limited by shares | Live |
| USA DOUBLE KNOCK GREEN INT'L CHEMICAL FERTILIZER HOLDING GROUP LIMITED | Private company limited by shares | Dissolved |
| Knock Knock Ideas Company Limited | Private company limited by shares | Live |
| Knock Click Tech Limited | Private company limited by shares | Live |
| Fortune Knock Technology Limited | | Live |
| KNOCK KNOCK TRADING LIMITED | Private company limited by shares | Live |
| KNOCKBOX COMPANY LIMITED | Private company limited by shares | Live |
| HONGKONG KNOBS AND KNOCKERS LIMITED | Private company limited by shares | Dissolved |
| WEB KNOCKERS MEDIA LIMITED | Private company limited by shares | Dissolved |
| Elite Knockinaam Creation Limited | | Live |
| KnocKnoc Limited | Private company limited by shares | Live |
| KnocKnock Technologies Asia (Hong Kong) Limited | Private company limited by shares | Live |
| KNOCKOUT LIMITED | Private company limited by shares | Dissolved |
| Knockout Creative Limited | Private company limited by shares | Live |
| KNOCK'S INTERNATIONAL LIMITED | Private company limited by shares | Live |
| KNOCK'S MEDICAL SUPPLIES LIMITED | Private company limited by shares | Dissolved |