| SHANGHAI TO MILAN (STM) LIMITED | Private company limited by shares | Live |
| STMARK HORSE HK DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| USA ST.MARTIN GROUP LIMITED | Private company limited by shares | Live |
| STMC LIMITED | Private company limited by shares | Live |
| STMC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| STMEQ Limited | Private company limited by shares | Dissolved |
| STMG LIMITED | Private company limited by shares | Live |
| STMI LIMITED | | Live |
| STMI INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| STMICROELECTRONICS LIMITED | Private company limited by shares | Live |
| ST-MICROSTAR ELECTRONICS HOLDING LIMITED | Private company limited by shares | Live |
| STMJ (International) Company Limited | | Live |
| ST-MOLD LIMITED | Private company limited by shares | Live |
| STMOM001 LIMITED | Private company limited by shares | Live |
| STMOM002 LIMITED | Private company limited by shares | Live |
| STMOM003 LIMITED | Private company limited by shares | Live |
| STMOM004 LIMITED | Private company limited by shares | Live |
| STMP TRADE COMPANY LIMITED | Private company limited by shares | Live |
| STMT CAPITAL LIMITED | Private company limited by shares | Live |
| STMT ENTERPRISE LIMITED | Private company limited by shares | Live |
| STMTH HOLDING COMPANY LIMITED | | Live |