| OTTA LIMITED | Private company limited by shares | Dissolved |
| OTTA TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| OTTACA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OTTALAND COMPANY LIMITED | Private company limited by shares | Dissolved |
| Jiangmen Ottanta Otto Faucet Co., Limited | Private company limited by shares | Live |
| Ottanta Hardware (HK) Limited | Private company limited by shares | Live |
| OTTANTA OTTO LIMITED | Private company limited by shares | Live |
| OTTAR INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| OTTAWA FUR COMPANY LIMITED | Private company limited by shares | Live |
| OTTAWA COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTAX LIMITED | Private company limited by shares | Live |
| 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 |
| OTTI DEVELOPMENT LIMITED | Private company limited by shares | Live |
| OTTI INTERIOR CONTRACTING LIMITED | Private company limited by shares | Live |
| OTTICA ASIA LIMITED | Private company limited by shares | Dissolved |
| OTTICA (CHINA) LIMITED | Private company limited by shares | Dissolved |
| OTTICA FAR EAST LIMITED | Private company limited by shares | Dissolved |
| Ottica (Hong Kong) Limited | Private company limited by shares | Live |
| OTTIGEN LIMITED | Private company limited by shares | Live |
| OTTIGO (HK) Limited | Private company limited by shares | Live |
| OTTIGO International Limited | Private company limited by shares | Live |
| OTTIMO COMPANY LIMITED | Private company limited by shares | Live |
| OTTIMO CASA LIMITED | Private company limited by shares | Live |
| Ottimo Consulting Limited | Private company limited by shares | Live |
| Ottimo Energy Limited | Private company limited by shares | Live |
| OTTIMO GROUP LIMITED | Private company limited by shares | Live |
| Ottimo Management Company Limited | Private company limited by shares | Dissolved |
| OTTIMOMO LIMITED | Private company limited by shares | Live |
| OTTLEY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OTTO G. S. LIMITED | Private company limited by shares | Dissolved |
| OTTO LIMITED | Private company limited by shares | Dissolved |
| OTTO LIMITED | Private company limited by shares | Live |
| OTTO INC LIMITED | Private company limited by shares | Live |
| OTTO LIMITED | Private company limited by shares | Live |
| OTTO Capital LIMITED | Private company limited by shares | Live |
| OTTO DRAGON LIMITED | Private company limited by shares | Dissolved |
| OTTO ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| OTTO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OTTO GRAND LIMITED | Private company limited by shares | Dissolved |
| OTTO INTERACTIVE LIMITED | Private company limited by shares | Live |
| OTTO SENSE LIMITED | Private company limited by shares | Dissolved |
| Otto2 H.K. Co., Limited | Private company limited by shares | Live |
| OTTOBURY LIMITED | Private company limited by shares | Dissolved |
| Ottocento Limited | Private company limited by shares | Live |
| Ottocento Cinquantadue Milano Limited | | Live |
| OTTOCOLOR LIMITED | Private company limited by shares | Live |
| OTTOENERGY LIMITED | | Live |
| OTTOFIELD COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTOGEN LIMITED | Private company limited by shares | Live |
| Ottogo Inc Limited | | Live |
| OTTOHILL LIMITED | Private company limited by shares | Live |
| OTTO-JEPY MARKETING (H.K.) LIMITED | Private company limited by shares | Dissolved |
| OTTOLINA HK LIMITED | Private company limited by shares | Live |
| Ottolina Coffee HK Limited | Private company limited by shares | Dissolved |
| OTTOMAN LIMITED | Private company limited by shares | Dissolved |
| OTTOMAN LIMITED | Private company limited by shares | Live |
| Ottoman Evershine Construction Limited | Private company limited by shares | Live |
| Ottoman Evershine Enterprise Company Limited | Private company limited by shares | Live |
| Ottoman Evershine Finance Limited | Private company limited by shares | Live |
| OTTOMAN IMPORT & EXPORT COMPANY LIMITED | Private company limited by shares | Live |
| OTTOMAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Ottoman Evershine Asset Management Limited | Private company limited by shares | Live |
| 1453 OTTOMAN MEDITERRANEAN LIMITED | Private company limited by shares | Live |
| OTTOMAN MEDITERRANEAN CUISINE LIMITED | Private company limited by shares | Live |
| Ottoman Mediterranean Resorts Cusine Limited | Private company limited by shares | Live |
| OTTOMAN VENTURE COMPANY LIMITED | Private company limited by shares | Live |
| OTTOMOB LIMITED | Private company limited by shares | Live |
| OTTOMOBILE LIMITED | Private company limited by shares | Live |
| OTTON ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| OTTONA LIMITED | Private company limited by shares | Live |
| OTTONIAN VACATION LIMITED | Private company limited by shares | Live |
| OTTOPOST LIMITED | Private company limited by shares | Dissolved |
| OTTOPRO LIMITED | Private company limited by shares | Live |
| GERMANY OTTOR (HONG KONG) GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTTOR Tech HK Co., Limited | | Live |
| OTTOROSSO LIMITED | Private company limited by shares | Dissolved |
| OTTO'S FOOD SERVICES CO., LIMITED | Private company limited by shares | Live |
| OTTOSTAR LIMITED | Private company limited by shares | Dissolved |
| OTTOWAY COMPANY LIMITED | Private company limited by shares | Dissolved |