| CYRUS LIU 43 LIMITED | | Live |
| CYRUS 38 LIMITED | | Live |
| CYRUS 39 LIMITED | | Live |
| CYRUS 40 LIMITED | | Live |
| CYRUS 41 LIMITED | | Live |
| CYRUS 42 LIMITED | | Live |
| CYRUS 44 LIMITED | | Live |
| CYRUS 45 LIMITED | | Live |
| CYRUS 46 LIMITED | | Live |
| CYRUS 47 LIMITED | | Live |
| CYRUS 48 LIMITED | | Live |
| Rock Cyrus Limited | | Live |
| C.Y.S. ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| CYSC COMPANY LIMITED | Private company limited by shares | Live |
| Cysco HK Limited | Private company limited by shares | Live |
| CYSD TECHNOLOGY LIMITED | | Live |
| HONG KONG CYSEA INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| Cysec Limited | Private company limited by shares | Live |
| SAFECAP (CYSEC) LIMITED | Private company limited by shares | Live |
| CYSECURITY ELECTRONIC LIMITED | Private company limited by shares | Live |
| CYSL ENGINEERING LIMITED | | Live |
| Cyson Advisors Limited | | Live |
| CYSPO TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| CYSTAGELIGHT HK LIMITED | Private company limited by shares | Live |
| CYSTAL ON ENTERPRISE LIMITED | Private company limited by shares | Live |
| CYSTAL PLACE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CYSTECH ELECTRONICS (HK) LIMITED | Private company limited by shares | Dissolved |
| CYSTM LIMITED | Private company limited by shares | Live |
| cystron technology Limited | Private company limited by shares | Live |
| CYSW CONSULTING LIMITED | Private company limited by shares | Live |
| C.Y.S.W.L. LIMITED | Private company limited by shares | Live |
| CYTAC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| CYTAS TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CYT.B LIMITED | Private company limited by shares | Live |
| CYTE LIMITED | Private company limited by shares | Dissolved |
| CYTea Company Limited | | Live |
| CYTECH LIMITED | Private company limited by shares | Dissolved |
| Cytek Limited | Private company limited by shares | Live |
| CYTEL (CHINA) LIMITED | Private company limited by shares | Live |
| Cytel (Hong Kong) Limited | Private company limited by shares | Live |
| Cytenium Consulting Services Limited | Private company limited by shares | Live |
| CyteTherapeutics Co. Limited | Private company limited by shares | Live |
| CYTEZ COMPANY LIMITED | Private company limited by shares | Dissolved |
| CYTH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CYTHEREA LIMITED | Private company limited by shares | Live |
| CYTHK (HONG KONG) SHIPPING LIMITED | | Live |
| Cytic International Limited | Private company limited by shares | Live |
| CYTIK COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA CYTOBIO (CCB) CO., LIMITED | Private company limited by shares | Dissolved |
| Cytochondria International Trade Limited | Private company limited by shares | Live |
| Hong Kong International CytoMed Technology Company Limited | | Live |
| HK RUNSHENG CYTOMED TECHNOLOGY LIMITED | Private company limited by shares | Live |
| CYTOMED THERAPEUTICS CHINA LIMITED | | Live |
| CYTOMICS LIMITED | Private company limited by shares | Live |
| Hong Kong CytoSol Biopharma Company Limited | Private company limited by shares | Live |
| Shenzhen Cytouch Electronics Limited | Private company limited by shares | Live |
| Cytowake HK Limited | Private company limited by shares | Live |
| CYTOWISE LIMITED | Private company limited by shares | Live |
| CYTOZYME ASIA LIMITED | Private company limited by shares | Dissolved |
| CYTOZYME FAR EAST AND CHINA LIMITED | Private company limited by shares | Dissolved |
| CYTOZYME LABORATORIES LIMITED | Private company limited by shares | Dissolved |
| CYTRAN TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CYTRONICS LIMITED | Private company limited by shares | Dissolved |
| CYTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| Cytrus (HK) Limited | Private company limited by shares | Live |
| CYTse Limited | | Live |
| CYTS-OCEANIA LIMITED | Private company limited by shares | Live |
| CYTUNG LIMITED | | Live |
| CYTWHK LIMITED | Private company limited by shares | Live |
| HONGKONG CYTX TRAVEL LIMITED | Private company limited by shares | Live |
| HONG KONG CYTX MAINLAND TOURISM LIMITED | Private company limited by shares | Live |
| An Cyuan Limited | | Live |
| Cyuan Sheng (HK) Limited | Private company limited by shares | Dissolved |
| CYUAN TRADE LIMITED | | Live |
| CYUI HK COMPANY LIMITED | Private company limited by shares | Live |
| Cyun Hau Limited | Private company limited by shares | Live |
| Siu Cyun Wu Limited | | Live |
| WU SIU CYUN COMPANY LIMITED | | Live |
| CYUN TRADE LIMITED | | Live |
| CYUN4 FASHION DESIGN LIMITED | Private company limited by shares | Live |
| HK C.YUNG INT'L LIMITED | Private company limited by shares | Live |
| CYUNION CO., LIMITED | Private company limited by shares | Live |
| CYVACE LIMITED | Private company limited by shares | Live |
| Cyverse HK Limited | | Live |
| CYVOLE LIMITED | Private company limited by shares | Dissolved |
| CYWAY ELECTRONICS LIMITED | | Live |
| CYWAY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CyWee Hong Kong Limited | Private company limited by shares | Live |
| CyweeMotion HK Limited | Private company limited by shares | Live |
| CYWELL FASHIONS LIMITED | Private company limited by shares | Live |
| CYWILA LIMITED | Private company limited by shares | Dissolved |
| CYWOO REALTY LIMITED | Private company limited by shares | Dissolved |
| CYWOOD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CYWORLD CHINA LIMITED | Private company limited by shares | Dissolved |
| CYXIN (HK) Co., Limited | Private company limited by shares | Live |
| C.Y.Y TRADE CO., LIMITED | Private company limited by shares | Live |
| CYY1 Limited | Private company limited by shares | Live |
| CYY2 Limited | Private company limited by shares | Live |
| CYY3 Limited | Private company limited by shares | Live |
| CYY4 Limited | Private company limited by shares | Live |