| COSTAR OPTICAL LIMITED | Private company limited by shares | Live |
| COSTAR SHIPPING LIMITED | Private company limited by shares | Live |
| CO-STAR TEXTILE LIMITED | Private company limited by shares | Live |
| CO-STAR TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| COSTAR TRADING LIMITED | Private company limited by shares | Live Ceased dormancy on 05-Feb-2013 |
| COSTAR UNIVERSAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| COSTARIS HK LIMITED | Private company limited by shares | Live |
| COSTAR-PRO LIMITED | Private company limited by shares | Dissolved |
| Costarry Culture (HK) Limited | Private company limited by shares | Live |
| COSTART TECHNOLOGY LIMITED | Private company limited by shares | Live Commenced dormancy on 09-Sep-2013 |
| COSTA'S ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| COSTAS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CO-STATES LIMITED | Private company limited by shares | Live |
| COSTBEAT LIMITED | | Live |
| COSTCO LIMITED | Private company limited by shares | Dissolved |
| LA COSTE COMPANY LIMITED | Private company limited by shares | Dissolved |
| COSTE COMPANY LIMITED | Private company limited by shares | Live |
| EZ COSTEC HK LIMITED | Private company limited by shares | Live |
| COSTECH LIMITED | Private company limited by shares | Dissolved |
| COSTECH LIMITED | Private company limited by shares | Live |
| COSTEF LIMITED | Private company limited by shares | Live |
| COSTEL LIGHTING LIMITED | Private company limited by shares | Live |
| COSTEL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| COSTEN ENTERPRISE CO., LIMITED | Private company limited by shares | Live |
| COSTER LIMITED | Private company limited by shares | Live |
| Coster Trade Limited | | Live |
| Costflows Limited | | Live |
| CO-STH LIMITED | | Live |
| COSTIN COMPANY LIMITED | Private company limited by shares | Dissolved |
| COSTINI LIMITED | Private company limited by shares | Live |
| COSTLESS EXPRESS LIMITED | Private company limited by shares | Live |
| CostM Limited | | Live |
| COSTMORE CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| COSTONE COMPANY LIMITED | Private company limited by shares | Live |
| COSTONE INVESTMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| Co-stone Venture Investment Management Company Limited | Private company limited by shares | Live |
| Costos HK Limited | Private company limited by shares | Live |
| COSTPLUS HK LIMITED | Private company limited by shares | Live |
| Astra Costra Limited | Private company limited by shares | Live |
| COSTRADE LIMITED | Private company limited by shares | Live |
| COSTRAN SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Costrans Company Limited | Private company limited by shares | Live |
| Costrends Cloud Management Limited | Private company limited by shares | Live |
| COSTROLL COMPANY LIMITED | Private company limited by shares | Live |
| COSTUME LIMITED | Private company limited by shares | Live |
| Qun Loy Costume Limited | Private company limited by shares | Dissolved |
| M.S COSTUME LIMITED | Private company limited by shares | Dissolved |
| LGJ COSTUME LIMITED | Private company limited by shares | Live |
| HK JIN HAI COSTUME LIMITED | Private company limited by shares | Live |
| BEST COSTUME JEWELRY LIMITED | Private company limited by shares | Live |
| LINGPAO CHAMPION (CHINA) COSTUME LIMITED | Private company limited by shares | Live |
| JINXIANG COSTUME LIMITED | Private company limited by shares | Live |
| San Luye Costume Limited | Private company limited by shares | Live |
| HK TAIJIYING COSTUME LIMITED | Private company limited by shares | Dissolved |
| H. K. SAN YAT JUK COSTUMES LIMITED | Private company limited by shares | Dissolved |
| HK FURUIXIN COSTUMES LIMITED | Private company limited by shares | Live |
| Hong Kong PuFeiTe Costumes Co., Limited | Private company limited by shares | Live |
| ALEXANDRE LILIAN CREATIVE COSTUMES LIMITED | Private company limited by shares | Live |
| Costumes.com Limited | Private company limited by shares | Live |
| USI & COSTUMI LIMITED | Private company limited by shares | Live |
| COSTWAY SCM LIMITED | Private company limited by shares | Live |
| COSTWORX LIMITED | Private company limited by shares | Live |
| COSTY GLOBAL CO., LIMITED | Private company limited by shares | Dissolved |