| OPUS INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| OPUS COLLECTION LIMITED | Private company limited by shares | Dissolved |
| Opus Consultancy Limited | Private company limited by shares | Live |
| OPUS CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| OPUS GLOBAL CONSULTING LIMITED | Private company limited by shares | Live Commenced dormancy on 21-Jun-2016 |
| Opus Corporate Solutions Limited | Private company limited by shares | Live |
| OPUS CORPORATION LIMITED | Private company limited by shares | Dissolved |
| OPUS Creare Limited | Private company limited by shares | Live |
| Opus One Creative Limited | Private company limited by shares | Live |
| Opus Credit Limited | Private company limited by shares | Live |
| DANTTY OPUS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OPUS DESIGN LIMITED | Private company limited by shares | Live |
| OPUS ONE DESIGN LIMITED | Private company limited by shares | Live |
| OPUS DESIGN AND BUILD LIMITED | Private company limited by shares | Live |
| OPUS EDUCATION LIMITED | Private company limited by shares | Live |
| OPUS ENGINEERING LIMITED | Private company limited by shares | Live |
| OPUS TWO ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| OPUS FASHION LIMITED | Private company limited by shares | Dissolved |
| Opus Finance Limited | Private company limited by shares | Live |
| OPUS FOREVER MUSIC LIMITED | Private company limited by shares | Live |
| Opus Fortune Capital Limited | | Live |
| OPUS FREIGHT COMPANY LIMITED | Private company limited by shares | Live |
| Opus Capital Global Limited | Private company limited by shares | Dissolved |
| GRAND OPUS LIMITED | Private company limited by shares | Live |
| Greatest Opus Limited | | Live |
| OPUS GROUP LIMITED | Private company limited by shares | Dissolved |
| OPUS GROUP HK COMPANY LIMITED | Private company limited by shares | Live |
| LABOR OPUS GROUP Limited | Private company limited by shares | Dissolved |
| OPUS VENTURE GROUP LIMITED | Private company limited by shares | Live |
| OPUS (H.K.) LIMITED | Private company limited by shares | Live Commenced dormancy on 23-Apr-2010 |
| OPUS HOLDING COMPANY LIMITED | | Live |
| Hong Kong Opus Clothing Limited | Private company limited by shares | Live |
| FASHIONS BY OPUS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OPUS FRAMING & ART SUPPLIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| Opus Recruitment Solutions Hong Kong Limited | Private company limited by shares | Live |
| Opus (Hong Kong) Technology Limited | | Live |
| OPUS THREE HONG KONG LIMITED | Private company limited by shares | Live |
| Opus Trading (Hong Kong) Limited | Private company limited by shares | Live |
| Opus Hong Kong Trading Company Limited | Private company limited by shares | Live |
| OPUS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OPUS ONE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Opus International Limited | Private company limited by shares | Live |
| OPUS INVESTMENT LIMITED | Private company limited by shares | Live |
| Opus Investment Asia Limited | Private company limited by shares | Live |
| OPUS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OPUS ONE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| GRAND OPUS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OPUS JEWELLERY COMPANY LIMITED | Private company limited by shares | Live |
| OPUS LINK LIMITED | Private company limited by shares | Live |
| Opus Capital Management Limited | Private company limited by shares | Live |
| Opus Investment Management Limited | Private company limited by shares | Live |
| OPUS RISK MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| OPUS GARMENT MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| OPUS MARKETING LIMITED | Private company limited by shares | Live |
| OPUS MEDIA LIMITED | Private company limited by shares | Dissolved |
| OPUS MEDIA LIMITED | Private company limited by shares | Live |
| Opus Meditech Company Limited | Private company limited by shares | Dissolved |
| Opus Microsystems Limited | Private company limited by shares | Live |
| OPUS ONE MUSIC LIMITED | Private company limited by shares | Live |
| OPUS ONE MUSIC ACADEMY LIMITED | Private company limited by shares | Dissolved |
| OPUS 1 MUSIC FOUNDATION LIMITED | | Live |
| OPUS (PACIFIC) COMPANY LIMITED | Private company limited by shares | Live |
| Opus One Parking Limited | Private company limited by shares | Live |
| OPUS PLANNING COMPANY LIMITED | Private company limited by shares | Live |
| OPUS ENTERTAINMENT PRODUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| OPUS MEDIA PRODUCTIONS LIMITED | Private company limited by shares | Dissolved |
| OPUS RESOURCES LIMITED | Private company limited by shares | Dissolved |
| OPUS International School Management Limited | Private company limited by shares | Live |
| SILENT OPUS LIMITED | Private company limited by shares | Live |
| OPUS STUDIO COMPANY LIMITED | Private company limited by shares | Live |
| OPUS CRYSTAL STUDIO LIMITED | Private company limited by shares | Live |
| OPUS CRYSTAL STUDIO (SZ) LIMITED | Private company limited by shares | Live |
| OPUS TECH LIMITED | Private company limited by shares | Dissolved |
| OPUS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OPUS ONE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Opus Technology Co. , LIMITED | | Live |
| Opus Media Technology Limited | Private company limited by shares | Live |
| OPUS THREE LIMITED | Private company limited by shares | Live |
| OPUS INTERNATIONAL TRADE LIMITED | Private company limited by shares | Live |
| Opus Trading Limited | Private company limited by shares | Dissolved |
| OPUS TRADING CO., LIMITED | Private company limited by shares | Live |
| OPUS GENERAL TRADING LIMITED | | Live |
| OPUS TRADING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OPUS INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| OPUS TRAVEL COMPANY LIMITED | Private company limited by shares | Live |
| OpuSafe Limited | Private company limited by shares | Live |
| OPUSAN ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| OPUSC TRADING COMPANY LIMITED | Private company limited by shares | Live |
| OpusChin Limited | Private company limited by shares | Dissolved |
| OPUSCHINA GROUP LIMITED | | Live |
| OPUSMAGNUM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OPUSONE TECHNOLOGIES (ASIA) LIMITED | Private company limited by shares | Dissolved |
| OPUSSOME TRADING CO., LIMITED | Private company limited by shares | Live |
| OPUTECH LIMITED | Private company limited by shares | Live |
| SEIWA OPUTO (H.K.) CO., LIMITED | Private company limited by shares | Live |
| Opuz Enterprise Limited | Private company limited by shares | Live |
| O.P.V. (OVERSEAS) LIMITED | Private company limited by shares | Live |
| Opwef Entertainment Limited | Private company limited by shares | Live |