| O.G. ASIA Company Limited | Private company limited by shares | Live |
| O.G. CORPORATION LIMITED | Private company limited by shares | Live |
| O.G. DESIGN LIMITED | Private company limited by shares | Dissolved |
| O.G. APPROACH (H.K.) LIMITED | Private company limited by shares | Live |
| O.G. INTERNATIONAL FASHION Limited | Private company limited by shares | Live |
| O.G. INVEST LIMITED | Private company limited by shares | Dissolved |
| O.G. PRINTING PRODUCTIONS LIMITED | Private company limited by shares | Live |
| TRICYCLE OGAGE HK LIMITED | Private company limited by shares | Live |
| OGAI TRADING COMPANY LIMITED | Private company limited by shares | Live |
| OGAIN COMPANY LIMITED | Private company limited by shares | Dissolved |
| OGALALA LIMITED | Private company limited by shares | Dissolved |
| OGALUE CO., LIMITED | Private company limited by shares | Live |
| OGAMAN TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| O-GAMES, CO., LIMITED | | Live |
| OGAN LIMITED | Private company limited by shares | Live |
| OGANES LIMITED | Private company limited by shares | Live |
| Silk Road Cooperation Oganization of Technology Innovation Limited | Private company limited by shares | Live |
| O-GARDEN S&T DEV. LIMITED | Private company limited by shares | Dissolved |
| OGARLI ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OGARY COMPANY LIMITED | Private company limited by shares | Dissolved |
| OGASAWARA & NAKAGAWA Limited | Private company limited by shares | Live |
| Ogasjon HK Limited | Private company limited by shares | Dissolved |
| OGASTUDIO LIMITED | Private company limited by shares | Live |
| OGAWA LIMITED | Private company limited by shares | Dissolved |
| OGAWA LIMITED | Private company limited by shares | Live |
| OGAWA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OGAWA KIKAKU CO. LIMITED | Private company limited by shares | Dissolved |
| OGAWA SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ogawa Sunshine Trading Co. Limited | Private company limited by shares | Live |
| OGAWA TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hong Kong OGbanana Technology and Trade Limited | Private company limited by shares | Live |
| OGCLOUD LIMITED | | Live |
| OG.CREW LIMITED | Private company limited by shares | Live |
| O&GCS Limited | Private company limited by shares | Live |
| OGDEN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Spencer Ogden (Hong Kong) Limited | Private company limited by shares | Live |
| OGEE LIMITED | Private company limited by shares | Dissolved |
| Ogee Aesthetic Beauty Limited | Private company limited by shares | Live |
| HK OGEER LIMITED | Private company limited by shares | Live |
| OGEMA LIMITED | Private company limited by shares | Live Ceased dormancy on 18-Jun-2014 |
| Ogems Jewelry (Hong Kong) Co., Limited | Private company limited by shares | Live |
| Ogen Art Co., Limited | Private company limited by shares | Live |
| OGEN TRADE CO., LIMITED | Private company limited by shares | Dissolved |
| OGen Technology Company Limited | Private company limited by shares | Live |
| Ogen Trading Limited | Private company limited by shares | Live |
| HongKong Ogende Technology Co., Limited | Private company limited by shares | Live |
| OGENET LIMITED | Private company limited by shares | Live |
| O'genic Hongkong Limited | Private company limited by shares | Live |
| OGERL GROUP LIMITED | Private company limited by shares | Live |
| OGET ORGANISATION FOR GLOBAL EFFICACY TESTING LIMITED | Private company limited by shares | Dissolved |
| O.G.G.C. LIMITED | Private company limited by shares | Live |
| ARRAKIS OGGETTI LIMITED | Private company limited by shares | Live |
| OGGI LIMITED | Private company limited by shares | Dissolved |
| OGGI ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OGGO LIMITED | Private company limited by shares | Dissolved |
| OGGO SPORTS PROMOTION LIMITED | Private company limited by shares | Live |
| Ogham (HK) Limited | | Live |
| Ogham International Limited | Private company limited by shares | Live |
| OGHK Limited | Private company limited by shares | Live |
| Oghma International Limited | Private company limited by shares | Live |
| OGIKUBO LIMITED | Private company limited by shares | Dissolved |
| OGILOY & MATHER PUBLIC RELATIONS LIMITED | Private company limited by shares | Dissolved |
| OGILVIE SEARCH ASIA LIMITED | Private company limited by shares | Dissolved |
| iPR OGILVY LIMITED | Private company limited by shares | Live |
| OGILVY LAING ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| Ogilvy (Hong Kong) Biotechnology Co., Limited | Private company limited by shares | Live |
| iPR OGILVY (CHINA) Limited | Private company limited by shares | Dissolved |
| OGILVY & MATHER (CHINA) LIMITED | Private company limited by shares | Live |
| Ogilvy & Co., Limited | Private company limited by shares | Live |
| Ogilvy Century Advertising Co., Limited | Private company limited by shares | Live |
| Hong Kong Ogilvy Group Co., Limited | Private company limited by shares | Live |
| Era Ogilvy Public Relations Co., Limited | Private company limited by shares | Live |
| HK OGILVY SHARE CO., LIMITED | Private company limited by shares | Live |
| OGILVY CULTURE MEDIA CO., LIMITED | Private company limited by shares | Live |
| Ogilvy & Haart Limited | Private company limited by shares | Live |
| Ogilvy Health Limited | Private company limited by shares | Live Commenced dormancy on 15-Jun-2000 |
| iPR OGILVY HOLDINGS LIMITED | Private company limited by shares | Live |
| OGILVY & MATHER (CHINA) HOLDINGS LIMITED | Private company limited by shares | Live |
| Social at Ogilvy, Hong Kong Limited | Private company limited by shares | Live |
| OGILVY & MATHER (HONG KONG) PRIVATE LIMITED | Private company limited by shares | Live |
| Hong Kong Ogilvy Printing Co., Limited | Private company limited by shares | Live |
| OGILVY & MATHER MARKETING COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| OGILVY & MATHER MARKETING SERVICES LIMITED | Private company limited by shares | Live Ceased dormancy on 24-Apr-2007 |
| OGILVY & MATHER (SINGAPORE) LIMITED | Private company limited by shares | Dissolved |
| HK Black Arc Ogilvy Advertising Media Limited | Private company limited by shares | Live |
| Ogilvy Media Co., Limited | Private company limited by shares | Live |
| OGILVY & MATHER ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| Mind Resource Ogilvy Limited | Private company limited by shares | Live |
| Ogilvy Securities Co., Limited | | Live |
| OGILVY & MATHER MANAGEMENT SERVICES LIMITED | Private company limited by shares | Dissolved |
| Shang Hai Ogilvy Wine Co., Limited | Private company limited by shares | Live |
| OGILVY PUBLIC RELATIONS WORLDWIDE LIMITED | Private company limited by shares | Live |
| OGINE INTERNATIONAL IMPORT EXPORT LIMITED | Private company limited by shares | Dissolved |
| OGINGA COMPANY LIMITED | Private company limited by shares | Live |
| O-Ginger (Technology) Co. LIMITED | | Live |
| OGIS LIMITED | Private company limited by shares | Live |
| OGIS Group Limited | Private company limited by shares | Live |
| OGIS SHIPPING LIMITED | Private company limited by shares | Live |
| OGISAKA HONG KONG COMPANY LIMITED | Private company limited by shares | Dissolved |
| OGISU HK CO., Limited | Private company limited by shares | Live |