| HK SH (OLD CHENGDU) TRADE LIMITED | Private company limited by shares | Live |
| Friends of Jesus (Old Friends of Jesus) Voluntary Service Limited | Company limited by guarantee | Live |
| EL GRANDE (OLD BOAT) COMPANY LIMITED | Private company limited by shares | Live |
| OLDAKER COMPANY LIMITED | Private company limited by shares | Dissolved |
| Oldboy Web3 Studio (HK) Limited | | Live |
| Oldboys Company Limited | Private company limited by shares | Live |
| OLDBURY TRADING LIMITED | Private company limited by shares | Dissolved |
| Oldcastle Limited | Private company limited by shares | Live |
| OLDCASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FRANCE OLDCHUN PETROLIUM GROUP LIMITED | Private company limited by shares | Dissolved |
| GUANGZHOU OLDCLAN FASHION&LEATHER CO., LIMITED | Private company limited by shares | Live |
| Oldco (DM) Limited | Private company limited by shares | Live |
| Olden Time Limited | | Live |
| OLDENBURG LIMITED | Private company limited by shares | Dissolved |
| Oldenburg (Hong Kong) Group Limited | Private company limited by shares | Dissolved |
| EGON OLDENDORFF (ASIA) LIMITED | Private company limited by shares | Dissolved |
| WORLD OLDER CULTURE HEALTH PROPERTY ASSOCIATION LIMITED | Private company limited by shares | Live |
| OLDFAITHFUL COMPANY LIMITED | Private company limited by shares | Live |
| Oldfazhioned Limited | Private company limited by shares | Live |
| OLDFIELD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OLDFORD LIMITED | Private company limited by shares | Dissolved |
| OLDFORD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HONGKONG OLDFRIENDKIM TECHNOLOGY COPERATION LIMITED | Private company limited by shares | Live |
| OLDFRONT EXPRESS LIMITED | Private company limited by shares | Dissolved |
| OLDHALL LIMITED | Private company limited by shares | Dissolved |
| OLDHAM LAND INVESTMENT COMPANY, LIMITED | Private company limited by shares | Dissolved |
| OLDHAM TRADING LIMITED | Private company limited by shares | Dissolved |
| OLDHAVEN COMPANY LIMITED | Private company limited by shares | Dissolved |
| FRANCE OLDHEAR GARMENT (HK) TRADING LIMITED | Private company limited by shares | Dissolved |
| OLDHK COMPANY LIMITED | Private company limited by shares | Dissolved |
| OLDIES PUB LIMITED | Private company limited by shares | Dissolved |
| OLDIES (CATERING) COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| OLDISH LIMITED | Private company limited by shares | Live |
| OldKing Jewels Limited | | Live |
| Oldlang Group Co., Limited | Private company limited by shares | Live |
| OLDLINK LIMITED | Private company limited by shares | Dissolved |
| FRANCE OLDMAN FASHION LIMITED | Private company limited by shares | Dissolved |
| FRANCE GANGSHI OLDMAN FASHION LIMITED | Private company limited by shares | Dissolved |
| JIESHI OLDMAN SHOES AND CLOTHES LIMITED | Private company limited by shares | Live |
| OLDMAX LIMITED | Private company limited by shares | Dissolved |
| FRENCH OLDMENHEAD FINERY (HK) GROUP LIMITED | Private company limited by shares | Dissolved |
| ITALY OLDMENHEAD INT'L DEV. FINERY LIMITED | Private company limited by shares | Dissolved |
| OLDO-2786 LIMITED | Private company limited by shares | Dissolved |
| OLDORBABY (INTERNATIONAL) INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| Oldseafood Engineering Company Limited | Private company limited by shares | Live |
| Oldsoilism Vintage Clothing And Goods Limited | Private company limited by shares | Live |
| Oldsore Limited | | Live |
| Oldstar Investments Limited | Private company limited by shares | Live |
| CHINESE ESTEEM OLDSTER CHARITY, LIMITED -THE- | Company limited by guarantee | Live |
| OLDTASTE LIMITED | Private company limited by shares | Live |
| OLDTAUN LIMITED | Private company limited by shares | Live |
| OLDTIMERS AUCTION PARTNERS LIMITED | Private company limited by shares | Live |
| OLDTOWN ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| Oldtown Resources Limited | Private company limited by shares | Live |
| OLDWAY (INDUSTRIAL) CO., LIMITED | Private company limited by shares | Live |
| Oldwell Enterprises Limited | Private company limited by shares | Live |
| Oldwich Investment Limited | Private company limited by shares | Live |
| HONG KONG OLDYECAR GARMENTS CO., LIMITED | Private company limited by shares | Dissolved |
| OLD-YOUNG SOCIETY LIMITED | Private company limited by shares | Dissolved |