| O.S. LAM & COMPANY, LIMITED | Private company limited by shares | Dissolved |
| EXCEL (O.S.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Supreme Group (O's) Limited | Private company limited by shares | Live |
| AGORA OS-2 LIMITED | Private company limited by shares | Live |
| OS4RE Limited | Private company limited by shares | Live |
| O.S.A. (HK) LIMITED | Private company limited by shares | Dissolved |
| ITALY OSABEILI INT'L GROUP LIMITED | Private company limited by shares | Dissolved |
| OSADA TRADING (ASIA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Osader Limited | Private company limited by shares | Live |
| OSAGE ART CONSULTANCY LIMITED | Private company limited by shares | Live |
| OSAGE CONTEMPORARY ART GALLERY LIMITED | Private company limited by shares | Dissolved |
| OSAGE DESIGN LIMITED | Private company limited by shares | Live |
| OSAGE GALLERY LIMITED | Private company limited by shares | Live |
| OSAGE ART AND IDEAS LIMITED | Private company limited by shares | Live |
| OSAGE INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| OSAGE MERCHANDISING LIMITED | Private company limited by shares | Live |
| OSAKA LIMITED | Private company limited by shares | Dissolved |
| OSAKA LIMITED | Private company limited by shares | Dissolved |
| OSAKA LIMITED | Private company limited by shares | Live |
| Osaka Bay Limited | Private company limited by shares | Live |
| Osaka Ajia Limited | | Live |
| OSAKA MOTOR AUDIO & ALARM COMPANY LIMITED | Private company limited by shares | Live |
| OSAKA BAKERY LIMITED | Private company limited by shares | Live |
| OSAKA BANANA LIMITED | | Live |
| OSAKA BOEKI LIMITED | Private company limited by shares | Dissolved |
| OSAKA NIKKO CO., LIMITED | Private company limited by shares | Live |
| TOKKO OSAKA CO., LIMITED | Private company limited by shares | Dissolved |
| OSAKA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OSAKA FINANCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSAKA (GROUP) INVESTMENT LIMITED | Private company limited by shares | Live |
| OSAKA HOCKEY ASIA LIMITED | Private company limited by shares | Live |
| NEW OSAKA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OSAKA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OSAKA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OSAKA PLASTIC (HONG KONG) LIMITED | Private company limited by shares | Live |
| RESTAURANT OSAKA (HONG KONG) LIMITED | Private company limited by shares | Live |
| OSAKA MANAGEMENT LIMITED | Private company limited by shares | Live |
| Osaka Mortgage Company Limited | | Live |
| OSAKA OPTICAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| Peak Osaka Dome HK Limited | | Live |
| Restaurant Osaka Limited | Private company limited by shares | Live |
| SITC Osaka Shipping Company Limited | Private company limited by shares | Live |
| OSAKA SPORTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSAKA TELECOMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| OSAKA TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSAKA TRADING LIMITED | Private company limited by shares | Live |
| OSAKADENT GROUP LIMITED | Private company limited by shares | Live |
| Osakadent Medical Limited | Private company limited by shares | Live |
| OSAKAICHI COMPANY LIMITED | Private company limited by shares | Live |
| OSAKI CO., LIMITED | Private company limited by shares | Dissolved |
| OSAKI CONSTRUCTION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OSAKI EXPORT LIMITED | Private company limited by shares | Live |
| OSAKI INDUSTRIAL GROUP LIMITED | Private company limited by shares | Dissolved |
| OSAKI PROPERTIES LIMITED | Private company limited by shares | Live |
| OSAKI TECH LIMITED | Private company limited by shares | Live |
| OSAKI TRADING CO LIMITED | Private company limited by shares | Live |
| OsAl Hongkong Limited | Private company limited by shares | Live |
| OSAL NYINGPO LIMITED | Company limited by guarantee | Live |
| HK OSALEAT TRADE LIMITED | Private company limited by shares | Dissolved |
| O'Salon Company Limited | Private company limited by shares | Live |
| OSALTYS Limited | Private company limited by shares | Live |
| OSAM AP CO., LIMITED | Private company limited by shares | Live |
| Osam Trade Co., Limited | Private company limited by shares | Live |
| OSAM HOME APPLIANCES & HARDWARE CO., LIMITED | Private company limited by shares | Live |
| OSAM IMMI INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OSAMA TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| OSAMA IMP EXP TRADING CO., LIMITED | Private company limited by shares | Live |
| OSAMA IMPORT & EXPORT LIMITED | Private company limited by shares | Live |
| OSAMA INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| OSAMA MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| OSAMA MARKETING INT.L CO., LIMITED | Private company limited by shares | Live |
| OSAMA MARKETING TRADE CO., LIMITED | | Live |
| OSAMA SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSAMA GROUP TRADING CO., LIMITED | Private company limited by shares | Live |
| OSAMAH AL-ASWAD BROTHERHOOD GLOBAL CO., LIMITED | | Live |
| OSAMARI CO., LIMITED | Private company limited by shares | Live |
| OSAMI LIMITED | Private company limited by shares | Live |
| Osan HK Limited | Private company limited by shares | Live |
| OSAN CO., LIMITED | Private company limited by shares | Live |
| Osan Technology Limited | Private company limited by shares | Live |
| OSANA SPA AND BEAUTY COMPANY LIMITED | Private company limited by shares | Live |
| ITALY OSANI FASHION (GROUP) CO., LIMITED | Private company limited by shares | Live |
| OSARE LIMITED | Private company limited by shares | Dissolved |
| OSAREK COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSAS LIMITED | Private company limited by shares | Dissolved |
| OSATE LIMITED | Private company limited by shares | Live |
| OSAWA LIMITED | Private company limited by shares | Dissolved |
| O.S.Bar Limited | Private company limited by shares | Live |
| OSBC LIMITED | Private company limited by shares | Live |
| OSBERT HK LIMITED | Private company limited by shares | Live |
| OSBORN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OSBORNE LIMITED | Private company limited by shares | Dissolved |
| OSBORNE INVESTMENTS LIMITED | Private company limited by shares | Live |
| OsborneWawn Limited | Private company limited by shares | Live |
| OSBOURNE LIMITED | Private company limited by shares | Live |
| OSCA LIMITED | Private company limited by shares | Dissolved |
| OSCAAR GROUP CO., LIMITED | Private company limited by shares | Live |
| OSCANE LIMITED | Private company limited by shares | Live |
| OSCANO COMPANY LIMITED | Private company limited by shares | Dissolved |
| OSCANYAN COMPANY LIMITED | Private company limited by shares | Dissolved |