| 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 |