| I.S.T. COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISTA ENERGY CONSERVATION SERVICE LIMITED | Private company limited by shares | Live |
| Zhejiang Ista Industry & Trade Co., Limited | Private company limited by shares | Live |
| PARS ISTA LIMITED | Private company limited by shares | Dissolved |
| ISTA WATCHCASE LIMITED | Private company limited by shares | Dissolved |
| iStabilizer Limited | Private company limited by shares | Live |
| iStack Forum Limited | Private company limited by shares | Live |
| iStack Capital Partners Limited | Private company limited by shares | Live |
| iStack Training Limited | Private company limited by shares | Live |
| I-STAFF CO. LIMITED | Private company limited by shares | Live |
| iStage Limited | Private company limited by shares | Live |
| ISTAGE THEATRE LIMITED | Company limited by guarantee | Live |
| iStaging Corporation Limited | Private company limited by shares | Live |
| ISTAMP INCORPORATION LIMITED | Private company limited by shares | Dissolved |
| ISTANA COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISTANA LIMITED | Private company limited by shares | Live |
| ISTANA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ISTANBUL LIMITED | Private company limited by shares | Dissolved |
| ISTANBUL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISTANBUL LIMITED | Private company limited by shares | Live |
| ISTANBUL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ISTAND MEDIA (HK) LIMITED | Private company limited by shares | Live |
| ISTANIA LIMITED | Private company limited by shares | Live |
| iStanley Limited | Private company limited by shares | Live |
| I.S.T.A.R. LIMITED | Private company limited by shares | Dissolved |
| ISTAR LIMITED | Private company limited by shares | Dissolved |
| I-STAR LIMITED | Private company limited by shares | Dissolved |
| iStar Limited | Private company limited by shares | Live |
| I-STAR ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| iStar Blockchain Limited | | Live |
| ISTAR CHEMICALS LIMITED | Private company limited by shares | Live |
| I-STAR CHINA LIMITED | Private company limited by shares | Dissolved |
| Istar Cloud Limited | | Live |
| Istar Led Co., Limited | Private company limited by shares | Live |
| Istar Dental Technology Co., Limited | | Live |
| ISTAR ELECTRONICS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ISTAR CENTURY ENTERTAINMENT GROUP CO., LIMITED | Private company limited by shares | Live |
| Shenzhen Istar Technology Co., Limited | Private company limited by shares | Live |
| I-STAR TRADE CO., LIMITED | Private company limited by shares | Live |
| iStar Consulting Limited | Private company limited by shares | Live |
| ISTAR INDUSTRIAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| I-Star Learning Education Limited | Private company limited by shares | Live |
| I-STAR ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| I-STAR ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| I-STAR ENTERTAINMENT HK LIMITED | Private company limited by shares | Live |
| ISTAR GROUP LIMITED | Private company limited by shares | Live |
| I-STAR ENTERTAINMENT GROUP LIMITED | Private company limited by shares | Live |
| ISTAR TECH (HK) CO., LIMITED | Private company limited by shares | Live |
| IStar (HK) Technology Limited | Private company limited by shares | Dissolved |
| ISTAR HOLDING LIMITED | Private company limited by shares | Live |
| ISTAR (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| I-STAR ENTERPRISE (HONG KONG) LIMITED | Private company limited by shares | Live |
| ISTAR TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| Hongkong Istar Film Media Co., Limited | Private company limited by shares | Live |
| HongKong I-Star International Co., Limited | Private company limited by shares | Live |
| ZHEJIANG ISTAR IMPORT AND EXPORT CO., LIMITED | | Live |
| I-STAR INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Istar International Limited | Private company limited by shares | Live |
| iSTAR International Wealth Management Co. Limited | Private company limited by shares | Live |
| Istar International Trading Limited | Private company limited by shares | Live |
| I-STAR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| I-STAR TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| i-starlet Limited | Private company limited by shares | Dissolved |
| ISTARNET.NET LIMITED | Private company limited by shares | Dissolved |
| ISTARON LIMITED | Private company limited by shares | Live |
| iStarPicks Limited | Private company limited by shares | Live |
| iSTARS Capital Limited | Private company limited by shares | Live |
| I-START CREATIVE LIMITED | Private company limited by shares | Live |
| iStart Venture Limited | Private company limited by shares | Live |
| iStar-up Limited | Private company limited by shares | Live |
| ISTARVISION CO., LIMITED | Private company limited by shares | Live |
| Istarway Travel Limited | Private company limited by shares | Live |
| I-STATE LIMITED | Private company limited by shares | Live |
| i-Station Co. Limited | Private company limited by shares | Dissolved |
| ISTC LIMITED | Private company limited by shares | Dissolved |
| ISTC Limited | Private company limited by shares | Live |
| ISTC TERPRISES LIMITED | | Live |
| iSteady Technology (HongKong) Limited | Private company limited by shares | Live |
| Istech Limited | Private company limited by shares | Live |
| I-STEED CREATIVE LIMITED | Private company limited by shares | Live |
| I-STEED CAPITAL GROUP LIMITED | Private company limited by shares | Live |
| I-steel Constructure Engeneering Co., Limited | Private company limited by shares | Live |
| Isteel Hongkong Co., Limited | Private company limited by shares | Live |
| FUAN ISTEEL IMPORT & EXPORT CO., LIMITED | Private company limited by shares | Live |
| isteel Industries Limited | | Live |
| iSTELL LIMITED | Private company limited by shares | Live |
| iStellar Company Limited | | Live |
| CABLE ISTELLATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| iSTEM Limited | Private company limited by shares | Live |
| iSTEM Education Limited | Private company limited by shares | Live |
| I-STEP LIMITED | Private company limited by shares | Dissolved |
| ISTER LIMITED | Private company limited by shares | Dissolved |
| ISTERNO LIMITED | | Live |
| ISTESMAR ASIA LIMITED | Private company limited by shares | Live |
| Istetic Group Limited | Private company limited by shares | Live |
| ISTEX LIMITED | Private company limited by shares | Dissolved |
| ISTHMUS LIMITED | Private company limited by shares | Live |
| ISTHMUS ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ISTIMEWA LIMITED | Private company limited by shares | Dissolved |
| ISTIRNA LIMITED | Private company limited by shares | Live |