| 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 |
| OneAsc Limited | | 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 |
| oneBloc Limited | | Live |
| Oneboat Capital Limited | Private company limited by shares | Live |
| Oneboat Outdoor Co., Limited | | Live |
| FOSHAN ONEBOND BUILDING MATERIALS CO., LIMITED | Private company limited by shares | Live |
| ONEBOND GROUP CO., LIMITED | Private company limited by shares | Live |
| ONEBOON GROUP COMPANY LIMITED | Private company limited by shares | Live |
| Oneboon International Company Limited | | Live |
| ONE-BOUND COMPANY LIMITED | Private company limited by shares | Live |
| ONEBOX CREATIVE LIMITED | Private company limited by shares | Live |
| ONEBOX TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONEBOXX CREATIONS LIMITED | Private company limited by shares | Live |
| Hong Kong Oneboy Investment Co., Limited | | Live |
| OneBridge Capital Limited | Private company limited by shares | Live |
| ONEBYONE TRADING CO., LIMITED | Private company limited by shares | Live |
| ONEBYZERO LIMITED | Private company limited by shares | Live |
| OneC Holding Investment Limited | | Live |
| OneCallAway.Fitness Limited | | Live |
| ONECAN HK LIMITED | Private company limited by shares | Live |
| Onecap Limited | Private company limited by shares | Live |
| DB ONECAPITAL LIMITED | Private company limited by shares | Live |
| ONECAPITALASSET.COM LIMITED | Private company limited by shares | Live |
| ONE.CARD LIMITED | Private company limited by shares | Dissolved |
| 9F Onecard Limited | Private company limited by shares | Live |
| Hong Kong Onecard Co., Limited | Private company limited by shares | Live |
| ONE-CARD INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ONECARDTONE LIMITED | Private company limited by shares | Live |
| OneCare Group Limited | Private company limited by shares | Live |
| ONECARE TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| ONECE LIMITED | Private company limited by shares | Live |
| ONECENT NEWTECH LIMITED | Private company limited by shares | Live |
| Onecent Technology Co., Limited | Private company limited by shares | Live |
| OneChain Limited | | Live |
| 8T8 ONECHAMPION LIMITED | Private company limited by shares | Live |
| HONG KONG ONECHANCE E-COMMERCE LIMITED | Private company limited by shares | Live |
| ONECHANCE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| oneCHARGE Solutions Limited | Private company limited by shares | Live |