| OLIN LIMITED | Private company limited by shares | Dissolved |
| OLIN ENTERPRISE LIMITED | Private company limited by shares | Live |
| Weifang Olin Import & Export Co., Limited | Private company limited by shares | Live |
| OLIN WILLIAMS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG OLINA INDUSTRY&TRADE CO., LIMITED | Private company limited by shares | Live |
| OLINDA LIMITED | Private company limited by shares | Live |
| HK OLINE IMPORT&EXPORT CO., LIMITED | Private company limited by shares | Live |
| OLINE TECHNOLOGY R&D CO., LIMITED | Private company limited by shares | Live |
| O-LINE TECHNOLOGY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| OLINE (HK)INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OLINE ISLAND DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| OLine Piano Education Group Limited | Private company limited by shares | Live |
| OLING LIFE SAVING & SWIMMING ASSOCIATION LIMITED | Private company limited by shares | Live |
| O-Link Limited | Private company limited by shares | Live |
| Olinkgolfer Co., Limited | Private company limited by shares | Live |
| Olinkit Limited | Private company limited by shares | Live |
| TAIZHOU OLINKO IMPORT & EXPORT CO., LIMITED | Private company limited by shares | Live |
| HK OLINPHE HOLDING GROUP LIMITED | Private company limited by shares | Live |