| Silentmode Limited | Private company limited by shares | Live |
| SILENTNIGHT LIMITED | | Live |
| SilentSense Limited | Private company limited by shares | Dissolved |
| SILENUS & COMPANY LIMITED | Private company limited by shares | Dissolved |
| SILENUS (HONG KONG) LIMITED | Private company limited by shares | Live |
| Silergy Electronics Co., Limited | Private company limited by shares | Live |
| SILESIA LIMITED | Private company limited by shares | Dissolved |
| SILESTEL LIMITED | Private company limited by shares | Dissolved |
| SILETZ AIR LIMITED | Private company limited by shares | Dissolved |
| SILEX LIMITED | Private company limited by shares | Dissolved |
| SILEX LAB LIMITED | Private company limited by shares | Live |
| Silezia Limited | Private company limited by shares | Live |
| SILFAIR LIMITED | Private company limited by shares | Live |
| SILFEE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Silford (Hong Kong) Company Limited | Private company limited by shares | Live |
| SILGOLD INVESTMENT CONSULTANTS LIMITED | Private company limited by shares | Live |
| SILHING LIMITED | Private company limited by shares | Dissolved |
| SILHOST INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SILHOUETTE LIMITED -THE- | Private company limited by shares | Dissolved |
| CHINA SILHOUETTE LIMITED | Private company limited by shares | Dissolved |
| La Jolie Silhouette Limited | Private company limited by shares | Live |
| SILHOUETTE ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| Silhouette Solutions Limited | Private company limited by shares | Live |
| Sili Co. Limited | Private company limited by shares | Live |
| SILI INTERNATIONAL (HK) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG SILI CO., LIMITED | Private company limited by shares | Live |
| Sili Hong Kong Limited | | Live |
| Hong Kong Sili Russia Company Limited | Private company limited by shares | Live |
| HONG KONG SILI TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SILI HOUSEHOLD LIMITED | Private company limited by shares | Live |
| SILI Industry Co., Limited | | Live |
| SILI (HK) MARKETING CONSULTANT CO., LIMITED | Private company limited by shares | Dissolved |
| Sili Technology Limited | | Live |
| Xue Sili Trading Co., Limited | | Live |
| SILI INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| SIWEI SILI TRADING LIMITED | Private company limited by shares | Live |
| SILIA COMPANY LIMITED | Private company limited by shares | Live |
| SILIBEI TRADE LIMITED | Private company limited by shares | Live |
| HK SILIBEI UNIVERSAL GROUP LIMITED | Private company limited by shares | Live |
| Siliborn Technology Limited | | Live |
| Hong Kong Silic Company Limited | | Live |
| Silica Limited | Private company limited by shares | Live |
| SILICA ASIA LIMITED | Private company limited by shares | Live |
| Silica Materials Co., Limited | Private company limited by shares | Live |
| Sinotech Silica Co., Limited | | Live |
| SILICA GLORY LIMITED | | Live |
| OYUAN SILICA RESOURCES LIMITED | Private company limited by shares | Dissolved |
| FOSHAN JINHUI SILICA GEL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SILICA TRADING LIMITED | Private company limited by shares | Dissolved |
| SILICA TRADING LIMITED | Private company limited by shares | Dissolved |
| TRIMERIZATION SILICA-GEL PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| SILICANO LIMITED | Private company limited by shares | Live |
| SILICASTONE LIMITED | Private company limited by shares | Live |
| KOWLOON SODIUM SILICATE FACTORY, LIMITED | Private company limited by shares | Live |
| TUNG HOI SODIUM SILICATE MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| SILICE LIMITED | Private company limited by shares | Live |
| SILICE HK LIMITED | Private company limited by shares | Dissolved |
| SILICEA LIMITED | Private company limited by shares | Live |
| Siliceous Art Limited | | Live |
| SILICON LIMITED | Private company limited by shares | Dissolved |
| Silicon Lab Company Limited | Private company limited by shares | Live |
| Advance Silicon Limited | Private company limited by shares | Dissolved |
| CHINA AGRICULTURAL SILICON VALLEY GROUP LIMITED | Private company limited by shares | Live |
| SILICON ALLEY.COM LIMITED | Private company limited by shares | Live |
| SILICON APPLICATION COMPANY LIMITED | Private company limited by shares | Live |
| SILICON APPLICATION ELECTRONIC CO., LIMITED | Private company limited by shares | Live |
| SILICON ELECTRONICS APPLICATION CO., LIMITED | Private company limited by shares | Live |
| SILICON APPLICATION (HK) LIMITED | Private company limited by shares | Dissolved |
| SILICON ARCHITECH DESIGNS (HK) LIMITED | Private company limited by shares | Dissolved |
| ARKO SILICON LIMITED | Private company limited by shares | Dissolved |
| SILICON ARTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SILICON VALLEY TECHNOLOGY (ASIA-PACIFIC) LIMITED | Private company limited by shares | Dissolved |
| SILICON AUSPICIOUS (HK) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| CHINA AUSUN POLYCRYSTALLINE SILICON HIGH-TECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| Automation on Silicon Limited | Private company limited by shares | Live |
| HK SILICON VALLEY BIOLOGY RESEARCH CENTRE LIMITED | Private company limited by shares | Dissolved |
| Silicon Capital Limited | Private company limited by shares | Live |
| SILICON ONE CAPITAL LLC LIMITED | Private company limited by shares | Live |
| HK CHANGXING SILICON LIMITED | Private company limited by shares | Dissolved |
| KO CHEONG SILICON MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| SILICON CHINA LIMITED | Private company limited by shares | Live |
| GREEN SILICON ENERGY (CHINA) CO. LIMITED | | Live |
| SILICON TEK CO., LIMITED | Private company limited by shares | Live |
| SILICON CO., LIMITED | Private company limited by shares | Live |
| PC SILICON CO., LIMITED | Private company limited by shares | Live |
| LDK Silicon Holding Co., Limited | Private company limited by shares | Live |
| SILICON ELECTRONIC (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Ningxia Dayang Silicon Industry Co., Limited | Private company limited by shares | Dissolved |
| ASIA-PACIFIC LOCKE SOLAR SILICON (HK) IMPORT & EXPORT CO., LIMITED | Private company limited by shares | Dissolved |
| HK METAL SILICON CO., LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN POQ SILICON CO., LIMITED | Private company limited by shares | Live |
| Silicon & System Co., Limited | | Live |
| SILICON TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HK Silicon Technology Co., Limited | Private company limited by shares | Live |
| Silicon Valley Dynamic Co., Limited | Private company limited by shares | Dissolved |
| Silicon Valley Commerce HK Limited | | Live |
| SILICON POWER COMPUTER & COMMUNICATIONS HK LIMITED | Private company limited by shares | Live |
| SILICON VALLEY GROUP OF COMPANIES LIMITED | Private company limited by shares | Dissolved |
| CONSTANT SILICON LIMITED | Private company limited by shares | Live |
| SILICON PACIFIC CONSULTING LIMITED | Private company limited by shares | Dissolved |