| CALC Capital Limited | Private company limited by shares | Live |
| CALC Capital 1 Limited | Private company limited by shares | Live |
| CALC CO., LIMITED | Private company limited by shares | Live |
| CALC Oriental 1 Limited | Private company limited by shares | Live |
| CALCAM LIMITED | Private company limited by shares | Live |
| CALCAR ENTERPRISES COMPANY (HK) LIMITED | Private company limited by shares | Dissolved |
| CALCAR INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CALCARIA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Calcatron Limited | Private company limited by shares | Live |
| CALCB TRADE LIMITED | | Live |
| CALCFUSION LIMITED | Private company limited by shares | Live |
| CALCH TECH (HK) LIMITED | Private company limited by shares | Dissolved |
| CAL-CHINE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CALCIFER LIMITED | Private company limited by shares | Live |
| Calcifer Learning Centre Limited | Private company limited by shares | Dissolved |
| Calcite Limited | Private company limited by shares | Live |
| CALCIUM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Calcium Ion Limited | Private company limited by shares | Live |
| Ningxia Yunfeng Calcium Carbide Co., Limited | Private company limited by shares | Dissolved |
| CHANGJIN CALCIUM INDUSTRY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| CHINA CALCIUM FRUIT GROUP CO., LIMITED | Private company limited by shares | Live |
| CHINA CALCIUM FRUIT GROUP CO., LIMITED | Private company limited by shares | Live |
| Calcium Group Limited | | Live |
| INDONESIA CALCIUM PRODUCTS LIMITED | Private company limited by shares | Live Commenced dormancy on 11-Nov-2013 |
| Calcium42 Limited | | Live |
| Calcnext company Limited | Private company limited by shares | Live |
| CALCO LIMITED | Private company limited by shares | Dissolved |
| CALCO LIMITED | Private company limited by shares | Live |
| CAL-CONNECTION CO., LIMITED | Private company limited by shares | Dissolved |
| CALCOT LIMITED | Private company limited by shares | Dissolved |
| CALCOT & RAWCOTT LIMITED | Private company limited by shares | Live |
| CALCULATED HONG KONG LIMITED | Private company limited by shares | Dissolved |
| CALCULATION FUND LIMITED | Private company limited by shares | Dissolved |
| CALCULATION FUND LIMITED | Private company limited by shares | Live |
| CHINA ALIYUN CALCULATION BIG DATA OPERATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| FANTASIA CALCULATOR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SMART CALCULATOR HONG KONG LIMITED | Private company limited by shares | Live |
| DAH SUN CALCULATOR MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| CALCULON LIMITED | Private company limited by shares | Dissolved |
| CALCULUS LIMITED | Private company limited by shares | Live |
| Calculus Circle Limited | | Live |
| Calculus Destination Consultants Limited | Private company limited by shares | Live |
| Deep Calculus Limited | Private company limited by shares | Live |
| Calculus Management Limited | | Live |
| CALCURY LIMITED | Private company limited by shares | Dissolved |
| CALCUS LIMITED | Private company limited by shares | Dissolved |
| CALCYON LIMITED | Private company limited by shares | Dissolved |