| Onda Co., Limited | Private company limited by shares | Live |
| ONDA CONCEPTS LIMITED | Private company limited by shares | Live |
| ONDA DESIGN LIMITED | Private company limited by shares | Dissolved |
| Digital ONDA Limited | Private company limited by shares | Live |
| ONDA INDUSTRIAL AND COMMERCIAL COMPANY LIMITED | Private company limited by shares | Live |
| ONDA COMMERCIAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| Onda Technologies Limited | Private company limited by shares | Live |
| Onda Network Technology Limited | | Live |
| ONDAG LIMITED | Private company limited by shares | Dissolved |
| ONDA-International Limited | Private company limited by shares | Live |
| ONDAR COMPANY, LIMITED | Private company limited by shares | Dissolved |
| SOCIETE APPLICATIONS TECHNOLOGIQUES IMAGERIE MICRO ONDE LIMITED | Private company limited by shares | Live |
| ONDERIC LIMITED | Private company limited by shares | Live Commenced dormancy on 21-Jan-1999 |
| ONDERLY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONDERMERE COMPANY LIMITED | Private company limited by shares | Live |
| ONDESIGN LIMITED | Private company limited by shares | Dissolved |
| On-Design (H.K.) Co. Limited | Private company limited by shares | Dissolved |
| ON-DEVELOPMENT LIMITED | Private company limited by shares | Live |
| ONDEX LIMITED | Private company limited by shares | Dissolved |
| ONDEX LIMITED | Private company limited by shares | Dissolved |
| ONDEX LIMITED | Private company limited by shares | Live |
| ONDEX ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONDEX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONDICO COMPANY LIMITED | Private company limited by shares | Live |
| ONDINA LIMITED | Private company limited by shares | Live |
| Ondine Limited | Private company limited by shares | Live |
| OndineMDD Limited | Private company limited by shares | Live |
| OndineMMD Limited | Private company limited by shares | Live |
| ONDION COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONDIT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONDIX LIMITED | Private company limited by shares | Live |
| ONDO COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONDO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONDOT LIMITED | Private company limited by shares | Live |
| ONDRIK LIMITED | Private company limited by shares | Dissolved |
| Onduz Constructions Limited | Private company limited by shares | Live |
| LG (ONE) LIMITED | Private company limited by shares | Dissolved |
| SKY ONE. Y. LIMITED | Private company limited by shares | Live |
| GC (ONE) Limited | Private company limited by shares | Live |
| SAN WO RESTAURANT (BRANCH ONE) CO. LIMITED | Private company limited by shares | Dissolved |
| UTILITYINFO (ONE CALL) LIMITED | Private company limited by shares | Live |
| OBAOR (ONE BELT AND ONE ROAD) INVESTMENT FUND CO. LIMITED | Private company limited by shares | Live |
| CAMBRIDGE NURSING HOME (CITY ONE) LIMITED | Private company limited by shares | Live |
| HOME DE COMFORT (CITY ONE) LIMITED | Private company limited by shares | Dissolved |
| TOP ONE01 LIMITED | Private company limited by shares | Live |
| One01 Capital Hong Kong, Limited | | Live |
| ONE0811 LIMITED | | Live |
| ONE10HUNDRED CO. LIMITED | Private company limited by shares | Live |
| ONE1ONE K LIMITED | Private company limited by shares | Live |
| ONE-2 FIT LIMITED | Private company limited by shares | Live |
| One2 Limited | | Live |
| One2 Entertainment Limited | Private company limited by shares | Live |
| ONE2 GLOBAL CO., LIMITED | Private company limited by shares | Live |
| One2 Ticketing Limited | Private company limited by shares | Live |
| ONE22 LIMITED | Private company limited by shares | Live |
| ONE2FREE PERSONALCOM LIMITED | Private company limited by shares | Live |
| one2many Limited | Private company limited by shares | Live |
| ONE2ONE E-MARKETING LIMITED | Private company limited by shares | Dissolved |
| One2Paid Limited | Private company limited by shares | Live |
| One6 Limited | | Live |
| ONE68 B LIMITED | Private company limited by shares | Live |
| ONE80 INDUSTRIAL LIMITED | Private company limited by shares | Live |
| One.A. Accessories Limited | Private company limited by shares | Live |
| OneA Consultancy Limited | Private company limited by shares | Live |
| ONE-A MEDIA (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ONE-A PROPERTY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ONE-ACE 8 LIMITED | Private company limited by shares | Live |
| OneAD Limited | Private company limited by shares | Live |
| Oneadds Technology Limited | | Live |
| ONEADS NETWORK LIMITED | Private company limited by shares | Live |
| ONEAFTER ASSOCIATES LIMITED | Private company limited by shares | Live |
| ONEAIM LIMITED | | Live |
| O'NEAL LIMITED | Private company limited by shares | Live |
| ONEALL ADDITIVES LIMITED | Private company limited by shares | Live |
| Oneallsports Limited | Private company limited by shares | Live |
| OneAPM Limited | Private company limited by shares | Live |
| ONEARTH LIMITED | Private company limited by shares | Live |
| OneAsia Limited | Company limited by guarantee | Live |
| OneAsia Network Limited | Private company limited by shares | Live |
| ONEASIA PACIFIC LIMITED | Private company limited by shares | Live |
| One-Asia Partners Limited | Private company limited by shares | Live |
| One-Asia HK P.E. Partners Limited | Private company limited by shares | Live |
| ONEASIA.COM (ASIA PACIFIC) LIMITED | Private company limited by shares | Dissolved |
| ONEASIAONE LIMITED | Private company limited by shares | Dissolved |
| OneAston HK Limited | Private company limited by shares | Live |
| OneAxcess Limited | Private company limited by shares | Live |
| ONEBAN TRADING LIMITED | | Live |
| China One-belt-one-Road Fund Management Co., Limited | Private company limited by shares | Live |
| ONEBEST Limited | Private company limited by shares | Live |
| ONEBEST TRADING LIMITED | Private company limited by shares | Live |
| ONEBESTWAY INTERNATIONAL (HK) INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| OneBev Company Limited | Private company limited by shares | Live |
| ONEBIDJAPAN LIMITED | Private company limited by shares | Live |
| Onebig Company Limited | | Live |
| Onebil Company Limited | Private company limited by shares | Live |
| OneBIM Limited | | Live |
| ONEBIT SERVICE AND TRADE LIMITED | Private company limited by shares | Live |
| ONEBIT TRADING LIMITED | Private company limited by shares | Live |
| ONEBIZTOPIA LIMITED | | Live |
| Oneboat Capital Limited | Private company limited by shares | Live |