| Only One Advertising Production Limited | | Live |
| ONLY ONE FILM PRODUCTION LIMITED | Private company limited by shares | Live |
| Best Products Only Limited | Private company limited by shares | Live |
| ONLY ONE PROPERTY LIMITED | Private company limited by shares | Live |
| ONLY ONE RESTAURANT COMPANY LIMITED | | Live |
| RICH ONLY LIMITED | Private company limited by shares | Dissolved |
| ONLY RISING INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ONLY SPRINT LIMITED | Private company limited by shares | Dissolved |
| STAFF ONLY LIMITED | | Live |
| ONLY STAGE LIMITED -THE- | Company limited by guarantee | Live |
| Tat2 Only Studio Limited | | Live |
| ONLY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONLY AND 1 TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONLY TIME LIMITED | Private company limited by shares | Live |
| Times Only Co Limited | | Live |
| Only Trade Limited | Private company limited by shares | Live |
| HK YOU ONLY TRADING LIMITED | Private company limited by shares | Live |
| Only You HK Trading Limited | Private company limited by shares | Live |
| Only Best Trading Limited | Private company limited by shares | Live |
| Only Beauty Cosmetic Trading Limited | Private company limited by shares | Live |
| ONLY TREASURE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Only Treasure Excellent Limited | | Live |
| ONLY ONE TREATMENT CENTER LIMITED | Private company limited by shares | Live |
| ONLY UNIQUE CO., LIMITED | Private company limited by shares | Live |
| ONLY VIEW COMPANY LIMITED | Private company limited by shares | Dissolved |
| Only Vision Limited | Private company limited by shares | Live |
| Only Want Limited | Private company limited by shares | Live |
| WEEKDAYS ONLY LIMITED | Private company limited by shares | Live |
| WHEELBARROWS ONLY SOURCING LIMITED | Private company limited by shares | Live |
| Not Only Wine Limited | | Live |
| ONLY WISDOM LIMITED | Private company limited by shares | Live |
| ONLY WOOD LIMITED -THE- | Private company limited by shares | Live |
| Only Words Limited | Private company limited by shares | Dissolved |
| Only1 Limited | Private company limited by shares | Live |
| OnlyADS Limited | | Live |
| Shenzhen Onlyaquar Co., Limited | Private company limited by shares | Live |
| ONLYBEST JEWELRY&GIFT CO., LIMITED | Private company limited by shares | Live |
| HK ZHUZHOU ONLY-BEST CO., LIMITED | Private company limited by shares | Live |
| YUEQING ONLYBO INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| FRANCE ONLYBRA DRESS FINERY GROUP LIMITED | Private company limited by shares | Dissolved |
| ONLYCARE MEDICAL COMPANY LIMITED | Private company limited by shares | Live |
| ONLYD CORP. LIMITED | Private company limited by shares | Live |
| Onlyemall Technology co., Limited | Private company limited by shares | Live |
| ONLYEST GROUP LIMITED | | Live |
| OnlyFace Limited | | Live |
| ONLY-FIRST TECHNOLOGY (INTERNATIONAL) CO., LIMITED | Private company limited by shares | Live |
| Onlyflyzone Universe Hongkong Limited | Private company limited by shares | Live |
| Onlygames Co., Limited | | Live |
| OnlyGames Global Entertainment Co., Limited | Private company limited by shares | Live |
| ONLYGEOTECHNICS LIMITED | Private company limited by shares | Live |
| OnlyGive Technology Co., Limited | | Live |
| Onlygood Co., Limited | Private company limited by shares | Live |
| ONLYGOT ENTERPRISE LIMITED | Private company limited by shares | Live |
| ONLYHERE LIMITED | Private company limited by shares | Live |
| ONLY-HITS LIMITED | Private company limited by shares | Live |
| ONLYLIGHT ENTERPRISES LIMITED | Private company limited by shares | Live |
| Onlylover HK Limited | Private company limited by shares | Live |
| ONLYMA TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| ONLYONE IMP AND EXP CO., LIMITED | Private company limited by shares | Live |
| ONLYONE GROUP (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Onlyone (Hong Kong) Limited | | Live |
| ONLYONE INTERNATIONAL (HONGKONG) GROUP COMPANY LIMITED | Private company limited by shares | Live |
| HK Onlyone Industry Co., Limited | Private company limited by shares | Live |
| SHENZHEN ONLYONE LIGHT LIMITED | Private company limited by shares | Live |
| ONLYONE SOLUTION LIMITED | Private company limited by shares | Live |
| ONLYONE TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| HK ONLYONE INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| ONLYONEUNEED TRADING LIMITED | Private company limited by shares | Live |
| ONLYOU ENTERPRISE SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| ONLYPAY LIMITED | Private company limited by shares | Live Commenced dormancy on 30-Mar-2016 |
| ONLYTECH ELECTRONICS COMPANY LIMITED | | Live |
| ONLYTECH SYSTEMS INC LIMITED | Private company limited by shares | Dissolved |
| ONLYTECH TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONLYTEK INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| ONLYTEX ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| ONLYU FURNITURE CO., LIMITED | Private company limited by shares | Dissolved |
| Onlyvog Corporation Limited | | Live |
| Onlyy E Co Limited | | Live |
| OnlyYou Household (Hong Kong) Holding Limited | Private company limited by shares | Live |