| CHINA SCIENCE COMMUNICATION RESEARCH CENTER LIMITED | Private company limited by shares | Dissolved |
| CHINA TAO XINGZHI EDUCATION SCIENCE RESEARCH INSTITUE LIMITED | Private company limited by shares | Dissolved |
| CYBERNAUT SCIENCE AND INNOVATION RESEARCH LIMITED | Private company limited by shares | Live |
| NATURE SPIRIT SCIENCE RESEARCH LIMITED | Private company limited by shares | Live |
| HONG KONG REVELATOR SCIENCE & TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| Richor(Hong Kong) Science and Technology Co., Limited | | Live |
| SHANGHAITP RIVER SCIENCE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Dr. Robot Creative Science Limited | Private company limited by shares | Live |
| Rockefeller Behavioral Science Limited | Private company limited by shares | Live |
| Rocket Science HK Limited | Private company limited by shares | Live |
| Rodeo (Hong Kong) Life Science Co. Limited | Private company limited by shares | Dissolved |
| Rok-It Science Universal Limited | Private company limited by shares | Live |
| FRANCE RONG YAN BEAUTY SCIENCE TRANING LIMITED | Private company limited by shares | Live |
| RONGDA SCIENCE AND TECHNOLOGY HK CO., LIMITED | Private company limited by shares | Live |
| RONGTONG SIHAI SCIENCE AND TRADE CO., LIMITED | Private company limited by shares | Live |
| ROSENTEC SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| TOWA ROZAI SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| RUAN KE Science and Technology Co., Limited | Private company limited by shares | Live |
| Ruidehengxin Science & Technology (HONGKONG) Company Limited | Private company limited by shares | Live |
| HK RUIKE BIOLOGICAL SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| RUKH SCIENCE TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| RUN-SHENG HK SCIENCE & TECHNOLOGY TRADING LIMITED | Private company limited by shares | Live |
| SAIL DIGITAL SCIENCE COLLEGE (HK) LIMITED | Private company limited by shares | Dissolved |
| SAKESI WEIER SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Salem Science Limited | Private company limited by shares | Live |
| UK SANGGE CROP SCIENCE CO., LIMITED | Private company limited by shares | Dissolved |
| Sanyou International Education Science And Technology Company Limited | Private company limited by shares | Live |
| CAMBRIDGE SCIENCE SUMMER SCHOOL LIMITED | Private company limited by shares | Dissolved |
| GRADUATE SCHOOL OF CHINESE MANAGEMENT SCIENCE LIMITED | Private company limited by shares | Dissolved |
| SCOUT SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| BYVISION SECURITY SCIENCE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ALL SECURITY & NETWORK SCIENCE GROUP LIMITED | Private company limited by shares | Live |
| SCIENCE TECHNOLOGY SECURITY PROTECTION F7 GROUP LIMITED | Private company limited by shares | Live |
| Anxing Security Science & Technology Co., Limited | Private company limited by shares | Live |
| Sentient Science Limited | Private company limited by shares | Live |
| HK Serene Science and Technology Co., Limited | | Live |
| SAILING SCIENCE & SERVICE LIMITED | Private company limited by shares | Live |
| Zhi Shan Science Co., Limited | | Live |
| SHANG HAI QUE YOU SCIENCE CO., LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI PEOPLE SCIENCE HOLDING LIMITED | Private company limited by shares | Live |
| SHANGHAI RENMIN SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| CHONGQING SHANWAISHAN SCIENCE & TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| SHAP SCIENCE & TECHNOLOGY DEV. (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SCIENCE INT'L TECHNOLOGY SHARE (HK) LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN KAILIDA SCIENCE AND TECHNOLOGY SHARE LIMITED | Private company limited by shares | Live |
| RBK Science Shares Limited | Private company limited by shares | Live |
| SHARK SCIENCE AND TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN-HONG KONG MEDICAL SCIENCE GROUP LIMITED | Private company limited by shares | Live |
| GERMANY SHIBALU CROP SCIENCE LIMITED | Private company limited by shares | Live |
| Shihong Science and Trade Co., Limited | Private company limited by shares | Live |
| HK SHIHUI SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SHING LEE SCIENCE & TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| SHIROUMA SCIENCE (HK) LIMITED | Private company limited by shares | Dissolved |
| HK ShunYuan Science Information Limited | Private company limited by shares | Live |
| SIEMNGS (HK) SCIENCE TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| Asia Silica Science Association Co. Limited | Private company limited by shares | Live |
| HK SILIYANG SCIENCE AND TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SILK ROAD SCIENCE INNOVATION HK LIMITED | Private company limited by shares | Live |
| GENERAL SIMULATOR SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SINCETIMES HK SCIENCE COMPANY LIMITED | Private company limited by shares | Live |
| Sine Science Tech Limited | Private company limited by shares | Live |
| SING TAI INTERNATIONAL LIFE SCIENCE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Ngai Sing Electronic Science and Technology Limited | Private company limited by shares | Live |
| Singa Science And Technology Limited | Private company limited by shares | Live |
| HONG KONG SINO-POWER SCIENCE & TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINOTT SCIENCE & TECHNOLOGY (CHINA) CO., LIMITED | Private company limited by shares | Dissolved |
| SIPHONE SCIENCE AND TECHNOLOGY LIMITED | | Live |
| Siuma Science Education Limited | | Live |
| Sizy Science and Technology Co., Limited | Private company limited by shares | Live |
| Skysymbol Science and Technology (HongKong) Co., Limited | Private company limited by shares | Dissolved |
| SMARTISYS SCIENCE AND TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| NANO SCIENCE SOLUTIONS LIMITED | Private company limited by shares | Live |
| Sootech Science and Trading (HK) Co., Limited | Private company limited by shares | Live |
| Bin Source (Hongkong) Science & Technology Co., LIMITED | Private company limited by shares | Live |
| South Sea Science Limited | Private company limited by shares | Live |
| SOUTHENVIC SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Soyes Science Technology Limited | Private company limited by shares | Live |
| New Sky Space Science Limited | Private company limited by shares | Live |
| HK Walk Space Science and Technology Co., Limited | Private company limited by shares | Live |
| Sparkhope Science Limited | Private company limited by shares | Live |
| Sparkhope Science Limited | | Live |
| SPECO OPHTHALMIC SCIENCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| STARCON SCIENCE TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| HK STARVIEW SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| China State Construction Science and Technology Limited | Private company limited by shares | Live |
| NEXT STATION SCIENCE AND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| STEEMA SCIENCE LIMITED | Private company limited by shares | Live |
| ASIA SCIENCE ACADEMY STOCK LIMITED | Private company limited by shares | Dissolved |
| NEW STONE SCIENCE & TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| SCIENCE STORYLAB LIMITED | Private company limited by shares | Live |
| Strand & Science Limited | Private company limited by shares | Live |
| Strong Science Technology Limited | | Live |
| Poly (China) Heritage Association for the Study of Science and Technology Limited | Private company limited by shares | Live |
| Succeed Science Co., Limited | Private company limited by shares | Live |
| Sunbeams Biomedical Science Limited | Private company limited by shares | Live |
| Sunbright Science Co., Limited | | Live |
| HK SUNNYROAD SCIENCE & TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Sunrich Science and Technology Limited | | Live |
| Sunshine Science and trade Co., Limited | | Live |
| SUNSHINE SCIENCE GROUP CO., LIMITED | Private company limited by shares | Live |