| OTTECH LIMITED | Private company limited by shares | Dissolved |
| OTTER LIMITED | Private company limited by shares | Live |
| OTTER OS LIMITED | | Live |
| OtterAI Co., Limited | Private company limited by shares | Live |
| OTTERBOURNE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OtterBox Hong Kong Limited | Private company limited by shares | Live |
| OTTERDEN COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTEREX LIMITED | Private company limited by shares | Live |
| OTTERFIELD COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTERHALL COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTERHAM LIMITED | Private company limited by shares | Dissolved |
| OTTERLANE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Grantham Mayo Van Otterloo Asset Management Limited | | Live |
| OTTERROCK LIMITED | Private company limited by shares | Dissolved |
| Otter's Adventure Limited | | Live |
| OTTERSHAW COMPANY LIMITED | Private company limited by shares | Live |
| OTTERSLUNCH LIMITED | Private company limited by shares | Live |
| OTTERSPOOL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OTTERSWICK LIMITED | Private company limited by shares | Dissolved |
| OTTERSWICK LIMITED | Private company limited by shares | Dissolved |
| Otterty Limited | Private company limited by shares | Live |
| OTTEWELL TRADING LIMITED | Private company limited by shares | Dissolved |