| ONE-HAND INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| ONEHEALTH COMPANY LIMITED | Private company limited by shares | Dissolved |
| OneHeart (HK) Limited | | Live |
| Oneheart Industrial Company Limited | Private company limited by shares | Live |
| ONEHERMES LIMITED | Private company limited by shares | Live |
| ONE-HI LIMITED | Private company limited by shares | Live |
| D C One.hk Company Limited | Private company limited by shares | Live |
| HK Onehong Limited | | Live |
| ONEHOPE LIMITED | Private company limited by shares | Live |
| ONEHOPE International Company Limited | Private company limited by shares | Live |
| PENFIELD ONE-HOUR PHOTO LIMITED | Private company limited by shares | Dissolved |
| OneHouse Limited | | Live |
| Onehouse (HK) Company Limited | Private company limited by shares | Live |
| OneHundredPlus Limited | Private company limited by shares | Live |
| theDesk OneHysan Limited | Private company limited by shares | Live |
| ONEI INTERNATIONAL GROUP (HK) LIMITED | Private company limited by shares | Live |
| ONEIDA LIMITED | Private company limited by shares | Live |
| ONEIGHT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONEIGHTY LIMITED | Private company limited by shares | Live |
| OneiHealth Company Limited | Private company limited by shares | Live |
| JON O'NEIL LIMITED | Private company limited by shares | Dissolved |
| O'NEILL ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| O'NEILL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| One-Ing Investment Management Co., Limited | Private company limited by shares | Live |
| ONEINK LIMITED | Private company limited by shares | Live |
| oneinzero Limited | Private company limited by shares | Live |
| ONEIRO COMPANY LIMITED | Private company limited by shares | Live |
| Oneiro HK Limited | Private company limited by shares | Live |
| ONEIROS LIMITED | Private company limited by shares | Live |
| HK OneJ Supply Chain Limited | | Live |
| GERMANY ONEJIABB LIMITED | | Live |
| ONEJOB GROUP LIMITED | Private company limited by shares | Live |
| HK ONEJOINT Information & Technology co., Limited | Private company limited by shares | Live |
| HongKong Onejoy Trading Co., Limited | Private company limited by shares | Live |
| ONEJUST HK LIMITED | | Live |
| One-Just International Co., Limited | Private company limited by shares | Live |
| One.K Limited | Private company limited by shares | Live |
| ONEKAI TRADING COMPANY LIMITED | Private company limited by shares | Live |
| JAPAN ONEKAOONE INTERNATIONAL GROUP CO., LIMITED | Private company limited by shares | Live |
| ONEKEN INDUSTRY LIMITED | Private company limited by shares | Live |
| Onekey Limited | Private company limited by shares | Live |
| ONEKEY LIMITED | | Live |
| ONEKEY.NET COMPANY LIMITED | Private company limited by shares | Dissolved |
| Onekg HK Company Limited | Private company limited by shares | Live |
| Oneklix Technologies Limited | Private company limited by shares | Live |
| ONELAB Limited | Private company limited by shares | Live |
| ONELAM TRADING LIMITED | Private company limited by shares | Live |
| ONELAND INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Onelane Limited | Private company limited by shares | Live |
| OneLawyer Limited | Company limited by guarantee | Live |
| Onelec Company Limited | Private company limited by shares | Live |
| ON-ELEGANT COMPANY LIMITED | Private company limited by shares | Dissolved |
| oneLegkick Production Limited | Private company limited by shares | Live |
| ONELIGHT LED TECH CO., LIMITED | Private company limited by shares | Dissolved |
| ONELIGHT LED TECH CO., LIMITED | Private company limited by shares | Live |
| ONELIGHT TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| GZ Onelight Electronics HK Co., Limited | Private company limited by shares | Live |
| Guangzhou Onelight Co., Limited | Private company limited by shares | Live |
| ONELINK ASIA LIMITED | Private company limited by shares | Dissolved |
| ONELINK CREATION LIMITED | Private company limited by shares | Live |
| ONE-LINK GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| Onelink Group Company Limited | Private company limited by shares | Live |
| Onelink Asia Group Limited | Private company limited by shares | Live Commenced dormancy on 25-Aug-2016 |
| ONELINK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONELINK MASTER LIMITED | Private company limited by shares | Live |
| ONELINK CABLE NETWORK (ASIA) LIMITED | Private company limited by shares | Dissolved |
| ONELINK NETWORKS COMPANY LIMITED | Private company limited by shares | Live |
| ONELINK TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONELINK TECHNOLOGY SOLUTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONELINK TRADING LIMITED | Private company limited by shares | Live |
| ONElink Vacations Limited | Private company limited by shares | Dissolved |
| ONELINKUP ADVERTISING & ISOLUTION LIMITED | Private company limited by shares | Live |
| ONELINKUP GROUP LIMITED | Private company limited by shares | Live |
| ONELIVE LIMITED | Private company limited by shares | Live |
| ONELONG INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Oneloop Limited | | Live |
| OneLove Investments Limited | Private company limited by shares | Live |
| Onelux Technology Company Limited | Private company limited by shares | Live |
| ONELY LIMITED | Private company limited by shares | Live |
| ONELYE ELECTRONICS LIMITED | Private company limited by shares | Live |
| ONELYE HK GROUP LIMITED | Private company limited by shares | Live |
| Oneman Limited | Private company limited by shares | Live |
| ONEMAR CNC MACHINERY LIMITED | Private company limited by shares | Dissolved |
| ONEMARK BRAND INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ONE.MARKET LIMITED | Private company limited by shares | Dissolved |
| Onemay (China) Limited | Private company limited by shares | Live |
| ONEMAZE LIMITED | Private company limited by shares | Live |
| ONEMC LIMITED | Private company limited by shares | Live |
| ONEME GROUP LIMITED | Private company limited by shares | Dissolved |
| OneMed Company Limited | Private company limited by shares | Live |
| ONEMED TRADE (HK) COMPANY LIMITED | | Live |
| ONEMEDHUB FAR EAST LIMITED | Private company limited by shares | Dissolved |
| ONEMEDIA LIMITED | Private company limited by shares | Dissolved |
| ONEMEDIA ASIA LIMITED | Private company limited by shares | Dissolved |
| OneMemo HK Limited | Private company limited by shares | Dissolved |
| ONEMIND LIMITED | Private company limited by shares | Dissolved |
| ONEMIND LIMITED | | Live |
| ONEMO LIMITED | | Live |
| SAMSUNG ONEMO TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| ONEMOB LIMITED | Private company limited by shares | Live |