| CYCLO-ENERGY LIMITED | Private company limited by shares | Dissolved |
| CYCLON MARITIME CO. LIMITED | Private company limited by shares | Live |
| CYCLONAIRE (ASIA) LIMITED | Private company limited by shares | Live |
| CYCLONE BICYCLE LIMITED | Private company limited by shares | Dissolved |
| Cyclone Cellar Limited | | Live |
| Cyclone Co., Limited | Private company limited by shares | Live |
| Hong Kong Cyclone Technology Co., Limited | | Live |
| CYCLONE COMMERCIAL LIMITED | Private company limited by shares | Live |
| CYCLONE COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| Cyclone Deep Computer Consultants Limited | Private company limited by shares | Live |
| Cyclone Consulting Limited | Private company limited by shares | Live |
| CYCLONE ELECTRIC MOTOR LIMITED | Private company limited by shares | Live Commenced dormancy on 13-Mar-2012 |
| SHENZHEN CYCLONE ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| FORCE CYCLONE LIMITED | Private company limited by shares | Live |
| CYCLONE GROUP LIMITED | Private company limited by shares | Dissolved |
| IT CYCLONE GROUP LIMITED | Private company limited by shares | Live |
| Imperial Cyclone Group Limited | Private company limited by shares | Live |
| CYCLONE TRADING GROUP LIMITED | Private company limited by shares | Live |
| Cyclone (HK) Co., Limited | Private company limited by shares | Live |
| CYCLONE (H.K.) INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Cyclone Trade Co., Limited | Private company limited by shares | Live |
| CYCLONE (HONGKONG) INT'L CO., LIMITED | Private company limited by shares | Live |
| Hongkong Cyclone Development Co., Limited | Private company limited by shares | Live |
| CYCLONE TECHNOLOGY INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| CYCLONE INDUSTRY LIMITED | Private company limited by shares | Live |
| ITALY CYCLONE WOODPECKER INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| CYCLONE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CYCLONE INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| GERMANY CYCLONE INTERNATIONAL (GROUP) LIMITED | Private company limited by shares | Live |
| CYCLONE GLOBAL LOGISTICS LIMITED | Private company limited by shares | Live |
| CYCLONE PRECISION LIMITED | Private company limited by shares | Dissolved |
| CYCLONE PUBLISHING LIMITED | Private company limited by shares | Live |
| Cyclone Offshore Resources Limited | Private company limited by shares | Dissolved |
| CYCLONE RUNNER BOAT CLUB LIMITED | Private company limited by shares | Dissolved |
| CYCLONE SHARP LIMITED | Private company limited by shares | Dissolved |
| CYCLONE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CycloneStrike Limited | | Live |
| CYCLOP LIMITED | Private company limited by shares | Dissolved |
| CYCLOPEAN LIMITED | Private company limited by shares | Dissolved |
| Cyclopes Limited | Private company limited by shares | Live |
| CYCLOPRO LIMITED | Private company limited by shares | Live |
| CYCLOPS LIMITED | Private company limited by shares | Dissolved |
| Cyclops AR Limited | Private company limited by shares | Live |
| CYCLOPS RECOGNITION LIMITED | Private company limited by shares | Live |
| CYCLOR COMPANY LIMITED | Private company limited by shares | Dissolved |
| Cyclotron Limited | Private company limited by shares | Live |
| HONG KONG CYCLOTRON LABORATORIES LIMITED | Private company limited by shares | Live |
| FIRST ORIENTAL CYCLOTRON LIMITED | Private company limited by shares | Live |