| SisterSix Limited | Private company limited by shares | Live |
| SICHENDA TRADING CORPORATION LIMITED | Private company limited by shares | Live |
| YING SING KNITTING COMPANY LIMITED | Private company limited by shares | Live |
| Silver Particle Company Limited | Private company limited by shares | Live |
| TOP SILVER INVESTMENT LIMITED | Private company limited by shares | Live |
| SINO HOSPITAL GROUP LIMITED | Private company limited by shares | Live |
| SIDERA INVESTMENT LIMITED | Private company limited by shares | Live |
| S.I. Solar Energy Limited | Private company limited by shares | Live |
| DAO KANGNING SILICONE SEALANT CO., LIMITED | Private company limited by shares | Live |
| SINO JOINT CORPORATION LIMITED | Private company limited by shares | Live |
| Simplexible Company Limited | Private company limited by shares | Live |
| Sinosun Capital Limited | Private company limited by shares | Live |
| SIMPLE DESIGN AND DRAFTING LIMITED | Private company limited by shares | Dissolved |
| SIWAY INSPECTION & SERVICE CO., LIMITED | Private company limited by shares | Live |
| ST Simple Trade Co., Limited | Private company limited by shares | Live |
| Sidious Limited | Private company limited by shares | Dissolved |
| Sinwoo Co., Limited | Private company limited by shares | Live |
| NEW SINO BRIGHT LIMITED | Private company limited by shares | Live |
| Sinovet (Asia) Limited | Private company limited by shares | Live |
| Sino Technology (China) Limited | Private company limited by shares | Live |
| Simlam Limited | Private company limited by shares | Dissolved |
| Top Silicone Case Production Limited | Private company limited by shares | Live |
| HK SINCODYNAMIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Kong Sing Consultancy Company Limited | Private company limited by shares | Live |
| SINUX INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| SINO ASIA BIOLOGICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SINO UNIVERSAL BIOLOGICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| AI Simliner Limited | Private company limited by shares | Live |
| HANG SING DA LIMITED | Private company limited by shares | Live |
| SINO POINT LIMITED | Private company limited by shares | Live |
| SINPAC LIMITED | Private company limited by shares | Live |
| SINOWELL MANUFACTURER LIMITED | Private company limited by shares | Live |
| SINO TECHNOLOGY TELECOMMUNICATIONS LIMITED | Private company limited by shares | Live |
| BROTHERS AND SISTERS IN CHRIST FOUNDATION LIMITED | Company limited by guarantee | Live |
| Sub-Intelligence Robotics (SIR) Corporation (Hong Kong) Limited | Private company limited by shares | Live |
| KIN SING MACHINERY LIMITED | Private company limited by shares | Dissolved |
| China Silicone Rubber Holdings Co. Limited | Private company limited by shares | Live |
| Sierra Trade Limited | Private company limited by shares | Live |
| SINAN ENTERPRISES LIMITED | Private company limited by shares | Live |
| Simcere International Limited | Private company limited by shares | Live |
| WINNER SINO LIMITED | Private company limited by shares | Live |
| SING LEE SHIPPING LIMITED | Private company limited by shares | Live |
| SINO ASIA CAPITAL RESOURCES LIMITED | Private company limited by shares | Live |
| Sino City Construction Group Co., Limited | Private company limited by shares | Live |
| SINZE HOLDING CO., LIMITED | Private company limited by shares | Live |
| SiMa Asia Pacific Limited | Private company limited by shares | Live |
| Sino Resources Industry Co., Limited | Private company limited by shares | Live |
| Sino Dream Trading Limited | Private company limited by shares | Dissolved |
| SING PING PRODUCTION COMPANY LIMITED | Private company limited by shares | Live |
| Sisu trading Limited | Private company limited by shares | Live |
| SINO MEDICAL EQUIPMENT COMPANY LIMITED | Private company limited by shares | Live |
| SINOLED LIMITED | Private company limited by shares | Live |
| Sino Super Way International Co., Limited | Private company limited by shares | Live |
| SIYUAN TECHNOLOGY GROUP ASIA LIMITED | Private company limited by shares | Live |
| S.I.J. INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| SINO OIL INDUSTRY LIMITED | Private company limited by shares | Live |
| SIMPLY FURNITURE LIMITED | Private company limited by shares | Live |
| CHI SING INTERNATIONAL MARINE PRODUCTS TRADING LIMITED | Private company limited by shares | Live |
| Sideways Sports Limited | Private company limited by shares | Live |
| Seung Sing Capital Limited | Private company limited by shares | Live |
| SINO SWIFT HONGKONG INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIGMA ENTERPRISE LIMITED | Private company limited by shares | Live |
| Sino Trucks & Machinery Co., Limited | Private company limited by shares | Live |
| SINEX Trading Limited | Private company limited by shares | Live |
| Hon Sing Hong Company Limited | Private company limited by shares | Live |
| SILVER CAPITAL RESOURCES LIMITED | Private company limited by shares | Live |
| LIFE SILICONE RUBBER COMPANY LIMITED | Private company limited by shares | Live |
| SIDA INDUSTRY TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| Sing Wah Industrial Limited | Private company limited by shares | Live |
| Sindbad Trading Limited | Private company limited by shares | Live |
| Simon Manufacturers Limited | Private company limited by shares | Live |
| SILVER OCEAN LIMITED | Private company limited by shares | Live |
| SINO STATE GLOBAL LIMITED | Private company limited by shares | Live Commenced dormancy on 07-Mar-2016 |
| Sincerina Limited | Private company limited by shares | Live |
| Simple Mosaic Limited | Private company limited by shares | Live |
| Sino Port Da You Shipping Company Limited | Private company limited by shares | Live |
| SINO-DG INTERNATIONAL LOGISTICS CO., LIMITED | Private company limited by shares | Live |
| SIBOXIANG INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SIRIUS CAPITAL LIMITED | Private company limited by shares | Live |
| SINO HUIJIN GROUP LIMITED | Private company limited by shares | Live |
| SINOSUN CHEMICALS LIMITED | Private company limited by shares | Live |
| ART SIGHT ENTERPRISES LIMITED | Private company limited by shares | Live |
| SILVER ROBIN LIMITED | Private company limited by shares | Live |
| SINO STONE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Sineco Limited | Private company limited by shares | Live |
| SITC Weihai Shipping Company Limited | Private company limited by shares | Live |
| PIK SING LIMITED | Private company limited by shares | Live |
| SINO WORLD ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| SICHUAN TALENT TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIQUE SING LIMITED | Private company limited by shares | Live |
| SINO ARTS & CULTURE INVESTMENT LIMITED | Private company limited by shares | Live |
| SINO DIGIT TRADING LIMITED | Private company limited by shares | Live |
| SINO CHAMPION INC LIMITED | Private company limited by shares | Live |
| SINO OCEAN ENERGY GROUP CO., LIMITED | Private company limited by shares | Live |
| SINO AUTO PARTS GROUP COMPANY LIMITED | Private company limited by shares | Live |
| Silrich Chemicals (HK) Co., Limited | Private company limited by shares | Live |
| SINO-CON MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| SINO ASIA MING FAT GROUP LIMITED | Private company limited by shares | Live |
| SIHIWAY NETWORK TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SINO HARMONY CHINA LIMITED | Private company limited by shares | Dissolved |