| openfast 2132250 · TMA1246183 | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |
| Openfit 2069724 · TMA1198595 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENFIT 1944149 · TMA1211535 | OPENFIT, LLC | 41 Education | Registered | 2023 |
| OPENFLOW 1551485 · TMA879848 | Open Networking Foundation, an Oregon non-profit corporation | 9 Electronics42 Science | Registered | 2014 |
| OPENFOLK 1540462 · TMA885736 | an individual | 6 Metal9 Electronics14 Jewellery+7 | Registered | 2014 |
| OPENFOAM 1410703 · TMA761690 | OpenCFD Limited | 9 Electronics41 Education42 Science | Registered | 2010 |
| OPENBRAND 2319606 | Gap Intelligence LLC | 35 Advertising42 Science | Pending | 2024 |
| OPENFORM 2038250 | OpenRoad Auto Group Limited | 36 Finance37 Construction | Pending | 2020 |
| openBOS 2123731 · TMA1181867 | Busch-Jaeger Elektro GmbH | 9 Electronics | Registered | 2023 |
| Openmove 2059255 · TMA1198561 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENVINO 1925579 · TMA1111163 · design | INTEL CORPORATION | 9 Electronics | Registered | 2021 |
| OPENVINO 1925578 · TMA1111162 | INTEL CORPORATION | 9 Electronics | Registered | 2021 |
| OPENFLEX 1913540 · TMA1127929 | Western Digital Technologies, Inc. | 9 Electronics37 Construction42 Science | Registered | 2022 |
| OPENBET 1904636 · TMA1212653 | OpenBet Limited | 9 Electronics38 Telecommunications41 Education | Registered | 2023 |
| OPENFORCE 1871907 · TMA1074974 | Contractor Management Services, LLC | 35 Advertising42 Science | Registered | 2020 |
| OPENBOOK 1821106 · TMA1095735 | GTY SOFTWARE INC. | 9 Electronics42 Science | Registered | 2021 |
| OPENFIGI 1743296 · TMA994707 | an individual | 9 Electronics16 Paper35 Advertising+1 | Registered | 2018 |
| OPENBET 1487388 · TMA970827 · design | OpenBet Limited | 9 Electronics28 Toys38 Telecommunications+2 | Registered | 2017 |
| Openbox 1342542 · TMA707667 | Hi-Tech Service Group Ltd. | 35 Advertising | Registered | 2008 |
| OPENIPO 1056393 · TMA562628 | W.R. Hambrecht + Co., Inc. | 9 Electronics16 Paper35 Advertising+5 | Registered | 2002 |
| OPENBOOK 1053867 · TMA578089 | W.R. Hambrecht + Co., Inc. | 35 Advertising | Registered | 2003 |
| OPENFIELD 2267487 | Owner not listed | 9 Electronics16 Paper35 Advertising+2 | Pending | 2023 |
| OPENVPN 2248948 | OPENVPN, INC. | 9 Electronics | Pending | 2023 |
| OPENBET 2172173 · design | OpenBet Limited | 9 Electronics38 Telecommunications41 Education | Pending | 2022 |
| OVENPRO 2139909 | Glanbia Nutritionals Limited | 1 Chemicals30 Coffee | Pending | 2021 |