| Royal Information Limited | | Live |
| RUITIAN INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| RUNDA INFORMATION LIMITED | Private company limited by shares | Live |
| RUWENN HONG KONG INFORMATION TECHNOLOGIES LIMITED | | Live |
| Sababa Information Technology Limited | Private company limited by shares | Live |
| CENTER INFORMATION SAFETY LIMITED | Private company limited by shares | Dissolved |
| SAMTECH INFORMATION LIMITED | Private company limited by shares | Dissolved |
| SANJIN INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| VTC SCHOOL OF BUSINESS AND INFORMATION SYSTEMS | Company limited by guarantee | Live |
| Scicome Information Co., Limited | Private company limited by shares | Live |
| SCIENTIFIC INFORMATION CENTRE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SCIENTREE Information (Hongkong) Co., Limited | Private company limited by shares | Live |
| ZHEDA LANDE SCITECH INFORMATION LIMITED | Private company limited by shares | Live |
| SEAGULL MARITIME INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Hong Kong SeaOne Information Technology Limited | | Live |
| SEAPAY INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Second Information Technology co., Limited | Private company limited by shares | Live |
| Second Information Technology Consulting (HK) Limited | | Live |
| Alliance Information Security Technology Co, Limited | Private company limited by shares | Live |
| CHINA DA DONG INFORMATION SECURITY GROUP LIMITED | Private company limited by shares | Live |
| RED FLAME INFORMATION SECURITY LIMITED | Private company limited by shares | Live |
| INFORMATION SECURITY ONE (HONG KONG) LIMITED | Private company limited by shares | Live |
| INFORMATION SECURITY SOFTWARE INVESTMENT LIMITED | Private company limited by shares | Live |
| KRAKEN INFORMATION SECURITY LABORATORY LIMITED | Private company limited by shares | Live |
| Information Security Solution Provider (HK) Limited | Private company limited by shares | Dissolved |
| INFORMATION SECURITY SYSTEMS CONSULTANT LIMITED | Private company limited by shares | Dissolved |
| INFORMATION SECURITY TECHNOLOGY INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Jiu Si Internet Information Security Technology Co., Limited | Private company limited by shares | Live |
| PEOPLE SECURITY INFORMATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| Panda Information Security Technology Co., Limited | Private company limited by shares | Dissolved |
| INFORMATION TECHNOLOGY & SECURITY SERVICE LIMITED | Private company limited by shares | Live |
| Wing Tai Information Security (HK) Limited | | Live |
| SELF-RESCUE & SELF-HELP INFORMATION NETWORKING CO. (CHINA) LIMITED | Private company limited by shares | Live |
| SELONE INFORMATION SERVICE CO., LIMITED | Private company limited by shares | Live |
| HONGKONG SEMILINK ELECTRONIC INFORMATION GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| SENTA INFORMATION LIMITED | Private company limited by shares | Live |
| SERRITEK INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OAS INFORMATION SERVICE LIMITED | Private company limited by shares | Dissolved |
| RSP INFORMATION SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| New Era Information Service Limited | Private company limited by shares | Dissolved |
| D&D Information Service Limited | Private company limited by shares | Live |
| BUSINESS INFORMATION SERVICE LIMITED | Private company limited by shares | Dissolved |
| CHINA INTERNATIONAL INDUSTRY & COMMERCE INFORMATION SERVICE LIMITED | Private company limited by shares | Dissolved |
| EDEN INFORMATION SERVICE LIMITED | Private company limited by shares | Live |
| FOXWART TRADE AND INFORMATION SERVICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Galaxy information service Limited | Private company limited by shares | Live |
| HONGKONG MIDDLE ASIA INFORMATION TECHNOLOGY SERVICE COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 29-Aug-2007 |
| U-TOP & D-POWER (HONGKONG) VISA INFORMATION SERVICE CO. LIMITED | Private company limited by shares | Live |
| Inclusive Information Service Limited | | Live |
| CHUNG WAH INSURANCE INFORMATION SERVICE CO. LIMITED | Private company limited by shares | Dissolved |
| HK KAILING INFORMATION SERVICE LIMITED | Private company limited by shares | Live |
| LeikeSaer Information Service Limited | Private company limited by shares | Live |
| INNOVATION TECHNOLOGY AND INFORMATION SERVICE INDUSTRY PROFESSIONALS ASSOCIATION LIMITED | Private company limited by shares | Live |
| SOUTH POINT INFORMATION SERVICE LIMITED | Private company limited by shares | Dissolved |
| China Telecom Broad Band Information Service Limited | Private company limited by shares | Live |
| Value Information Service Limited | Private company limited by shares | Live |
| SEVEN DAY INFORMATION TECHNOLOGY CO., LIMITED -THE- | Private company limited by shares | Live |
| SHANDA HK Information Limited | | Live |
| SHANDONG SENTE INFORMATION SCIENCE AND TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Shang Ming Information Co., Limited | Private company limited by shares | Live Commenced dormancy on 28-Sep-2018 |
| SHANG CHENG TRAVEL INFORMATION CONSULTING LIMITED | Private company limited by shares | Live |
| SHANGHAI BUSINESS INFORMATION LIMITED | Private company limited by shares | Live |
| SHANGHAI KPT INFORMATION SYSTEM CO., LIMITED | Private company limited by shares | Live |
| Shanghai Xun Lin Information Technology Co., Limited | Private company limited by shares | Live |
| Shanghai Quda Information Technology Co., Limited | Private company limited by shares | Live |
| Shanghai Coalition Sun Information & Technology Co., Limited | Private company limited by shares | Dissolved |
| SHANGHAI JIANKUN INFORMATION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| Shanghai Zhi Zhuo Information Technology (Hongkong) Limited | Private company limited by shares | Live |
| Shanghang Laiting Information Technology CO., Limited | Private company limited by shares | Live |
| Shangshan Information Technology Limited | | Live |
| FUDA INFORMATION SHARES LIMITED | Private company limited by shares | Live |
| Sharing Information Co., Limited | Private company limited by shares | Live |
| SHARK INFORMATION LIMITED | | Live |
| SHEEPWALK INFORMATION LIMITED | | Live |
| Hong Kong Shengfei Information Technology Limited | | Live |
| HK SHENGSHI INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SHENHUA INFORMATION LIMITED | Private company limited by shares | Dissolved |
| Shennan Information (HK) Limited | Private company limited by shares | Live |
| SHIMING INFORMATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Shineway Information Limited | Private company limited by shares | Live |
| FUNG SHING INVESTMENTS MANAGEMENT CONSULTANTS & INFORMATION LIMITED | Private company limited by shares | Dissolved |
| CHUNG SHING INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Shiny Information Limited | Private company limited by shares | Live |
| ZHONGYUAN SHOUCHUANG INTERNATIONAL INFORMATION LIMITED | Private company limited by shares | Dissolved |
| SHTC Information Technology (HK) Co., Limited | Private company limited by shares | Dissolved |
| SHUHAI INFORMATION SKILL (HK) LIMITED | Private company limited by shares | Live |
| HK SHUNWEI TECHNOLOGIES & INFORMATION LIMITED | | Live |
| HONG SHUO (HK) INFORMATION CO. LIMITED | Private company limited by shares | Dissolved |
| SHUOYOU HEALTHCARE INFORMATION SERVICE LIMITED | Private company limited by shares | Live |
| SICHUANG INFORMATION TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| SIDLINK INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK SIEMER INFORMATION ADVISORY LIMITED | Private company limited by shares | Live |
| SIENT Information Limited | Private company limited by shares | Live |
| GLOBAL SIGNAL INFORMATION SYSTEM HOLDING LIMITED | Private company limited by shares | Dissolved |
| Silverline Information Technology Co., Limited | | Live |
| BEST SINCERE INFORMATION LIMITED | Private company limited by shares | Live |
| SINCERE INFORMATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SINCERE INFORMATION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SINCERE INFORMATION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG SING DAK LEI INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |