| SINKA LIMITED | Private company limited by shares | Live |
| SINKAA TRADE & TEXTILES LIMITED | Private company limited by shares | Live |
| SINKAN LIMITED | Private company limited by shares | Dissolved |
| SINKAR LIMITED | Private company limited by shares | Live |
| SINKAREX FINANCE & INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SINKARTA FREIGHT EXPRESS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SINKASHO CO. LIMITED | Private company limited by shares | Dissolved |
| Sinke Company Limited | Private company limited by shares | Dissolved |
| SINKEE CO., LIMITED | Private company limited by shares | Live |
| SINKEE Engineering Limited | Private company limited by shares | Live |
| SINKEL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SINKI LIMITED | Private company limited by shares | Live |
| SINKIANG LIMITED | Private company limited by shares | Dissolved |
| SINKING DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SINKING INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Sinking International Group Limited | Private company limited by shares | Live |
| SINKING INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Sinkio Limited | Private company limited by shares | Live |
| SinkiTech Limited | Private company limited by shares | Live |
| SINKNA CO., LIMITED | Private company limited by shares | Dissolved |
| SINKNA TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| SINKO COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINKO LIMITED | Private company limited by shares | Live |
| SINKO BRIGHT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SINKO CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| SINKO DESIGN LIMITED | Private company limited by shares | Live |
| SINKO FAR EAST LIMITED | Private company limited by shares | Live |
| SINKO ELECTRONIC (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINKO ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINKO ELECTRONICS (HONGKONG) LIMITED | Private company limited by shares | Live |
| SINKO GLOBAL (HK) LIMITED | Private company limited by shares | Live |
| SINKO (HK) LIMITED | Private company limited by shares | Dissolved |
| SINKO ENTERPRISE (HK) LIMITED | Private company limited by shares | Live |
| SINKO AIR CONDITIONING (HONG KONG) LIMITED | Private company limited by shares | Live |
| SINKO (HONG KONG) INVESTMENT LIMITED | Private company limited by shares | Live |
| SINKO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SINKO INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINKO INVESTMENTS LIMITED | Private company limited by shares | Live |
| SINKO PRODUCTS LIMITED | Private company limited by shares | Live |
| SINKO PRODUCTS (CHINA) LIMITED | Private company limited by shares | Dissolved |
| SINKO PRODUCTS (HK) LIMITED | Private company limited by shares | Live |
| SINKO PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| SINKO PROPERTIES LIMITED | Private company limited by shares | Live |
| SINKO INTERNATIONAL PROPERTIES LIMITED | Private company limited by shares | Live |
| HK SINKO TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SHENZHEN SINKO TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SINKO INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| SINKO TRADING CO., LIMITED | Private company limited by shares | Live |
| SINKO INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| SINKOK COMPANY LIMITED | Private company limited by shares | Live |
| SINKON LIMITED | Private company limited by shares | Dissolved |
| SINKON LIMITED | Private company limited by shares | Live |
| SINKOOR LIMITED | Private company limited by shares | Dissolved |
| SINKOR RESOURCES LIMITED | | Live |
| Sinkpad Asia Limited | Private company limited by shares | Live |
| SIN-KUN LIMITED | Private company limited by shares | Live |
| SINKWARE CO., LIMITED | Private company limited by shares | Dissolved |
| SPEED SINKWARE COMPANY LIMITED | Private company limited by shares | Live |
| SINKY LIMITED | Private company limited by shares | Dissolved |