| OCEANIA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OceanMind Technologies Limited | Private company limited by shares | Live |
| OCEANSKY CYBER TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OCEANUX TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Oceanview Technologies Limited | | Live |
| OCOM TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| OCPT Technologies HK Limited | | Live |
| OCTAGON TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ODEPPO TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Odesa Technologies Limited | Private company limited by shares | Live |
| ODEXG TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OFFERU TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| Phaeton Offshore Technologies Limited | Private company limited by shares | Live |
| O.Fi Technologies Co., Limited | Private company limited by shares | Dissolved |
| OGMENTUM TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Live |
| OHHAMA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OLIVER TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OLVO TECHNOLOGIES LIMITED | | Live |
| OMAX TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Ombulls Technologies Limited | Private company limited by shares | Live |
| OMEGA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Omega Technologies Limited | | Live |
| Omnia Technologies Limited | Private company limited by shares | Live |
| Onestar Technologies Co., Limited | Private company limited by shares | Live |
| O-NET TECHNOLOGIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| ONINTEL TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONLINE TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| AppScience Online Technologies Limited | Private company limited by shares | Live |
| Learning English Online Technologies Limited | Private company limited by shares | Live |
| ONPASSIVE TECHNOLOGIES LIMITED | | Live |
| ONRICH TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONRICH TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONSOUND TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONSPEED TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTOP NETCOM TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONWA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONWARD TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONWAY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ONWEL TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| OOLONG TECHNOLOGIES LIMITED | | Live |
| OPEL Technologies Limited | Private company limited by shares | Live |
| Open Systems Technologies HK, Limited | Private company limited by shares | Live |
| OpenJaw Technologies AsiaPac Limited | Private company limited by shares | Live |
| OPENTEQ TECHNOLOGIES PRIVATE LIMITED | | Live |
| openTrans Technologies Limited | Private company limited by shares | Live |
| OPITMUZ TECHNOLOGIES PTE LIMITED | Private company limited by shares | Dissolved |
| OPNET TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OPPORTUNITY TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| CIT OPTIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| EAGLEYES OPTICAL TECHNOLOGIES CO., LIMITED | Private company limited by shares | Dissolved |
| EASTSKY OPTICAL TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Pacific Optical Technologies Limited | Private company limited by shares | Live |
| OptiCon Technologies Limited | Private company limited by shares | Dissolved |
| OPTIK TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| OPTIMUM TECHNOLOGIES PRIVATE LIMITED | Private company limited by shares | Live |
| Option A Technologies Limited | Private company limited by shares | Live |
| YOUTECH OPTOELECTRONIC TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Live |
| HK YOUTECH OPTOELECTRONIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| CREATECH OPTOELECTRONICS TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| OPTOWISE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Optronix Technologies Limited | Private company limited by shares | Live Commenced dormancy on 28-Jan-2014 |
| OPZEAL TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| ORBIT TECHNOLOGIES INC. LIMITED | Private company limited by shares | Live |
| ORCA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ORCENT TECHNOLOGIES HONG KONG COMPANY LIMITED | Private company limited by shares | Dissolved |
| ORCHID TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN OREBO TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| SHENZHEN OREVA TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| ORIENT TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Orient Digital Technologies Limited | | Live |
| ORIENT POWER TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| NEW ORIENTAL TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| ORIENTAL PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Oriental Smart Technologies Limited | Private company limited by shares | Live |
| Orpheus Clean Technologies Limited | Private company limited by shares | Live |
| OSPREY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OSYN TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| OTIAK TECHNOLOGIES INC. LIMITED | Private company limited by shares | Dissolved |
| Oursun Technologies Limited | Private company limited by shares | Live |
| OVERERA TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| OxBLOCK TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| PACEMAKER TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC RIM TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| C 3 PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| FAN YA PACIFIC RIM TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| NEW PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| PACIFIC WIN TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PAN PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| TOP PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC MAX TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ON PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC WAY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| M & M Pacific Technologies Limited | Private company limited by shares | Live |
| PACIFIC WIN TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PACIFIC WAY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| TOP PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| TOP PACIFIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| PACIFIC WIN TECHNOLOGIES LIMITED | Private company limited by shares | Live |