| istyle Global (Hong Kong) Co., Limited | Private company limited by shares | Live |
| ISTYLE OPTICAL LIMITED | Private company limited by shares | Dissolved |
| istyle Retail (Hong Kong) Co., Limited | Private company limited by shares | Live |
| ISTYLE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| I-STYLE VISION LIMITED | Private company limited by shares | Live |
| I.STYLE DESIGN WORK LIMITED | Private company limited by shares | Dissolved |
| ISTYLECITY.COM LIMITED | Private company limited by shares | Live |
| ISTYLES SUITCASE CO., LIMITED | Private company limited by shares | Dissolved |
| iSTYLEUP LIMITED | Private company limited by shares | Live |
| isualsense LIMITED | Private company limited by shares | Live |
| iSubstation Limited | Private company limited by shares | Live |
| I-SUCCESS LIMITED | Private company limited by shares | Dissolved |
| I-SUCCESS LIMITED | Private company limited by shares | Live |
| i-success Consulting Company Limited | Private company limited by shares | Live |
| iSuccess Training & Consultancy Co Limited | Private company limited by shares | Live |
| i-SUITE LIMITED | Private company limited by shares | Live |
| iSuite Creations Corporation Limited | Private company limited by shares | Live |
| Isula Limited | | Live |
| ISULAN TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| ISULAR INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| I-SUMMIT TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Isun Company Limited | Private company limited by shares | Live |
| I-SUN Inc LIMITED | Private company limited by shares | Live |
| iSun e-Commerce Limited | Private company limited by shares | Live |
| iSun3D Tech H.K Pte Limited | Private company limited by shares | Live |
| ISUNAFFAIRS LIMITED | Private company limited by shares | Live |
| iSunCrowd Limited | Private company limited by shares | Live |
| iSunCrowd Custody Limited | | Live |
| i-Sunday Entertainment Concepts Limited | Private company limited by shares | Live |
| Isunhome Holding Limited | Private company limited by shares | Live |
| XIAMEN ISUNNY PACKING CO., LIMITED | Private company limited by shares | Live |
| ISUNNY TRADING CO., LIMITED | Private company limited by shares | Live |
| ISUNPO VEHICLE LIMITED | Private company limited by shares | Live |
| I.SUPER LIMITED | Private company limited by shares | Dissolved |
| I-SUPER LIMITED | Private company limited by shares | Live |
| i-SUPER INC LIMITED | Private company limited by shares | Live |
| I-Superb Group Limited | Private company limited by shares | Live |
| ISUPET HONG KONG LIMITED | Private company limited by shares | Live |
| iSupport Limited | Private company limited by shares | Live |
| i-SUPREME PRODUCTION LIMITED | Private company limited by shares | Live |
| iSupreme Technologies Limited | Private company limited by shares | Live |
| ISURF LIMITED | Private company limited by shares | Live |
| I-SURF.COM (HK) LIMITED | Private company limited by shares | Dissolved |
| I.SURPLUS LIMITED | Private company limited by shares | Live |
| ISUS TECH (HK) CO., LIMITED | Private company limited by shares | Live |
| ISUTU HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| IS-VISION LIMITED | Private company limited by shares | Live |
| ISVision (HongKong) Technologies Corporation Limited | Private company limited by shares | Live |
| ISW1 Limited | Private company limited by shares | Live |
| ISW2 Limited | Private company limited by shares | Live |
| ISWARAMA HOLDING LIMITED | Private company limited by shares | Live |
| I-SWAY NEW ENERGY LIMITED | | Live |
| HONGKONG ISWAY INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Isweet Limited | Private company limited by shares | Live |
| iSWEETY LIMITED | Private company limited by shares | Live |
| ISWEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISWELL COMPANY LIMITED | Private company limited by shares | Live |
| I-SWIFT LIMITED | Private company limited by shares | Live |
| ISWILL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ISWIN COMPANY LIMITED | Private company limited by shares | Dissolved |
| I.SWISS TIME LIMITED | Private company limited by shares | Dissolved |
| I-SWORD COMPANY LIMITED | | Live |
| ISWT LIMITED | Private company limited by shares | Live Commenced dormancy on 01-Aug-2014 |
| ISWYN COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISYLED TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Isynat International Trading Co., Limited | Private company limited by shares | Dissolved |
| Dongguan Isync Trade Co., Limited | Private company limited by shares | Live |
| i.synthesis Limited | Private company limited by shares | Dissolved |
| ISYS SOLUTION LIMITED | Private company limited by shares | Live |
| I-SYSTEM LIMITED | Private company limited by shares | Dissolved |
| I-SYSTEM & CONSULTANCY COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISYSTEM MICRO LIMITED | Private company limited by shares | Live |
| I-SYSTEM TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| i-System Technology Limited | Private company limited by shares | Live |
| CYBERBASE ISYSTEMS LIMITED | Private company limited by shares | Dissolved |
| iSystems Asia Pacific Limited | Private company limited by shares | Live |
| iSystems Security Limited | Private company limited by shares | Live |
| ISYSTS Company Limited | Private company limited by shares | Live |
| Isyun (HongKong) Technology Co., Limited | | Live |