| Omniclouds Investments Limited | Private company limited by shares | Live |
| OMNICOATINGS LIMITED | | Live |
| OMNI-COM LIMITED | Private company limited by shares | Dissolved |
| OMNICOM LIMITED | Private company limited by shares | Live |
| OMNICOM ENGINEERING LIMITED | Private company limited by shares | Live |
| OMNICOM MEDIA GROUP GREATER CHINA LIMITED | Private company limited by shares | Live |
| OMNICOM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Omnicom Asia Pacific Limited | Private company limited by shares | Live |
| OmniCom Electrical Works Limited | | Live |
| Omnicon Limited | Private company limited by shares | Live |
| OMNICON INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| OMNICON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| OMNICON EVENTS LIMITED | Private company limited by shares | Live |
| OMNICON FREIGHT MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| OMNICORP ASIA LIMITED | Private company limited by shares | Dissolved |
| OMNICOURT LIMITED | Private company limited by shares | Dissolved |
| Omnicultural Association Limited | Company limited by guarantee | Live |
| Omnidis Limited | Private company limited by shares | Live |
| OmniDream Limited | | Live |
| OMNIEAVE LIMITED | Private company limited by shares | Live |
| OMNIFI Limited | Private company limited by shares | Live |
| OMNIFIC LIMITED | Private company limited by shares | Dissolved |
| Omnific Corporation Limited | Private company limited by shares | Live |
| OMNIFIC DESIGN & BUILD LIMITED | | Live |
| OMNIFIC GROUP LIMITED | | Live |
| HONGKONG OMNIFIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| OMNIFIC INT'L CORPORATION LIMITED | Private company limited by shares | Live |
| OMNIFIC MIRACLES INT'L INDUSTRY LIMITED | Private company limited by shares | Live |
| STUDIO OMNIFIC LIMITED | Private company limited by shares | Live |
| OMNIFIC WORKS LIMITED | Private company limited by shares | Live |
| OMNI-FIT LIMITED | Private company limited by shares | Dissolved |
| OMNIFOAM INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| Omniforce (HK) Limited | Private company limited by shares | Live |
| OMNIFORM INVESTMENT LIMITED | Private company limited by shares | Live |
| OMNIFY EXPORTS CO., LIMITED | Private company limited by shares | Live |
| OMNIGATE LIMITED | Private company limited by shares | Dissolved |
| OMNIGEO COMPANY LIMITED | Private company limited by shares | Dissolved |
| OMNIGLOW HONGKONG HOLDINGS LIMITED | Private company limited by shares | Live |
| OMNIGO LIMITED | Private company limited by shares | Live |
| OMNIGOLD LIMITED | Private company limited by shares | Live |
| OMNIGOOD LIMITED | Private company limited by shares | Dissolved |
| OmniGroup (HK) Limited | Private company limited by shares | Live |
| OMNIGSS HK LIMITED | Private company limited by shares | Live |
| OMNIGURU CONSULTANT COMPANY LIMITED | Private company limited by shares | Live |
| OMNIGURU CULTURAL DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Live |
| OMNIHEALTH LIMITED | Private company limited by shares | Live |
| OMNIIGROUP ASIA Limited | Private company limited by shares | Live |
| OmniKara Limited | Private company limited by shares | Live |
| OMNI-KENO ENTERPRISE MANAGEMENT CO., LIMITED | | Live |
| Omnikub Limited | | Live |
| OmniLearning ECA Centre Limited | Private company limited by shares | Live |
| Omnilife Asia Limited | Private company limited by shares | Dissolved |
| OMNI-LIFE & BEAUTY LIMITED | Private company limited by shares | Live |
| OMNI-LINK LIMITED | Private company limited by shares | Dissolved |
| Omni-link PA Company Limited | | Live |
| YBN Omnilink Limited | | Live |
| OMNIMAT COMPANY LIMITED | Private company limited by shares | Live |
| OMNIMAX INDUSTRIES LIMITED | Private company limited by shares | Live |
| OMNIMAX SOLUTIONS LIMITED | | Live |
| OMNIMEDIA HK LIMITED | Private company limited by shares | Live |
| OMNIMEDIA CONSULTANCY LIMITED | Private company limited by shares | Live |
| Omnimedics Limited | Private company limited by shares | Live |
| OMNINET (ASIA) LIMITED | Private company limited by shares | Dissolved |
| OMNING ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OMNINSIGHT CO., LIMITED | Private company limited by shares | Live |
| OmniPay Holdings Limited | Private company limited by shares | Live |
| TBP Omnipay Holdings (H.K.) Limited | Private company limited by shares | Live |
| OMNIPEDS CO., LIMITED | Private company limited by shares | Live |
| OMNIPEL HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Omnipep Holding Limited | Private company limited by shares | Live |
| OmniPhoton Trade Asia Co., Limited | Private company limited by shares | Live |
| OMNIPIXELS DISPLAY LIMITED | Private company limited by shares | Live |
| OMNIPLAS COMPANY LIMITED | Private company limited by shares | Live |
| OMNIPO INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Yau's Omnipotent Limited | Private company limited by shares | Live |
| Omnipres Company Limited | Private company limited by shares | Live |
| Omnipresence HK Limited | Private company limited by shares | Live |
| OMNIPROJECT LIMITED | Private company limited by shares | Dissolved |
| OmniPV Limited | | Live |
| OMNIQUEST LIMITED | Private company limited by shares | Dissolved |
| Omniraise Limited | Private company limited by shares | Live |
| OmniReach Limited | | Live |
| Omnirealproperty Limited | Private company limited by shares | Live |
| OMNIS COMPANY LIMITED | Private company limited by shares | Dissolved |
| OMNIS LIMITED | Private company limited by shares | Dissolved |
| OMNIS Limited | Private company limited by shares | Live |
| OMNISCIENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| OmniSeason Limited | Private company limited by shares | Live |
| Omnismart Limited | Private company limited by shares | Live |
| OMNISOL LIMITED | Private company limited by shares | Live |
| OMNISOLUTION MEDICAL SUPPLY LIMITED | Private company limited by shares | Live |
| OmniSource Limited | Private company limited by shares | Live |
| OMNISOURCING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Omnisourcing Trading Limited | Private company limited by shares | Live |
| OMNISPACE CO., LIMITED | | Live |
| Omni-Sport Tech Limited | | Live |
| Omnistream Co. Limited | Private company limited by shares | Live |
| OMNISUN INTERNATIONAL INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| OMNISYS COMPANY LIMITED | Private company limited by shares | Live |
| Omnitec Limited | | Live |