| Istlux Limited | Private company limited by shares | Live |
| ISTM Limited | Private company limited by shares | Live |
| Ist-Mein-Auto Limited | Private company limited by shares | Live |
| iStock Limited | Private company limited by shares | Live |
| i-Stock Finance Limited | Private company limited by shares | Dissolved |
| iStock Group Limited | Private company limited by shares | Live |
| ISTOCK21 LIMITED | Private company limited by shares | Dissolved |
| SVIATYE ISTOKI LIMITED | Private company limited by shares | Live |
| ISTON CONSULTANCY LIMITED | Private company limited by shares | Live |
| Iston Security Trading Company Limited | Private company limited by shares | Live |
| ISTONE LIMITED | | Live |
| ISTOP CONCEPTS LIMITED | Private company limited by shares | Live |
| i-Storage Limited | Private company limited by shares | Live |
| HONG KONG ISTORAGE LIMITED | Private company limited by shares | Dissolved |
| i-Store Express Limited | Private company limited by shares | Live |
| i-Store Global Limited | Private company limited by shares | Live |
| I-STORE HOLDING LIMITED | Private company limited by shares | Live |
| ISTORE TRADING COMPANY LIMITED | Private company limited by shares | Live |
| Istorist Limited | | Live |
| ISTORM NETWORK CO., LIMITED | Private company limited by shares | Live |
| ISTORM TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ISTORY LIMITED | Private company limited by shares | Live |
| ISTP LIMITED | Private company limited by shares | Live |
| i-Strategist Asia Limited | Private company limited by shares | Live |
| I-STRATEGY LIMITED | Private company limited by shares | Dissolved |
| i-Strategy Group Limited | Private company limited by shares | Dissolved |
| Istret Company Limited | Private company limited by shares | Live |
| ISTRIL LIMITED | Private company limited by shares | Live |
| iStrivers Software Limited | Private company limited by shares | Live |
| ISTS CO., LIMITED | Private company limited by shares | Live |
| I-STT MACAU LIMITED | Private company limited by shares | Dissolved |
| ISTUDIO LIMITED | Private company limited by shares | Live |
| I-STUDIO LIMITED | | Live |
| E-FFORT ISTUDIO LIMITED | Private company limited by shares | Dissolved |
| i-Studio Solutions Limited | Private company limited by shares | Live |
| iStudo Limited | Private company limited by shares | Live |
| iStudy Limited | Private company limited by shares | Live |
| ISTUDY EDUCATION GROUP LIMITED | Private company limited by shares | Live |
| iStudy Hub (Hong Kong) Company Limited | Private company limited by shares | Live |
| I-STUDY RESOURCES LIMITED | Private company limited by shares | Dissolved |
| i-Study-Online Company Limited | Private company limited by shares | Live |
| ISTUS LIMITED | Private company limited by shares | Live |
| IStyle Co., Limited | Private company limited by shares | Live |
| ISTYLE EXPORT&IMPORT CO., LIMITED | Private company limited by shares | Live |
| Istyle Furniture Co., Limited | Private company limited by shares | Live |
| 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 |