| openBOS 2123731 · TMA1181867 | Busch-Jaeger Elektro GmbH | 9 Electronics | Registered | 2023 |
| OPENBOOK 1821106 · TMA1095735 | GTY SOFTWARE INC. | 9 Electronics42 Science | Registered | 2021 |
| OPENBOOK 1053867 · TMA578089 | W.R. Hambrecht + Co., Inc. | 35 Advertising | Registered | 2003 |
| OPENBET 1904636 · TMA1212653 | OpenBet Limited | 9 Electronics38 Telecommunications41 Education | Registered | 2023 |
| OpenPBX 1757888 · TMA969165 | an individual | 38 Telecommunications | Registered | 2017 |
| OPENBET 1487388 · TMA970827 · design | OpenBet Limited | 9 Electronics28 Toys38 Telecommunications+2 | Registered | 2017 |
| OPENBET 2172173 · design | OpenBet Limited | 9 Electronics38 Telecommunications41 Education | Pending | 2022 |
| Openmove 2059255 · TMA1198561 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENBIKE 2056480 · TMA1198551 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENBLUE 2041374 · TMA1249415 | Tyco Fire & Security GmbH | 9 Electronics35 Advertising37 Construction+1 | Registered | 2024 |
| OPENFLEX 1913540 · TMA1127929 | Western Digital Technologies, Inc. | 9 Electronics37 Construction42 Science | Registered | 2022 |
| OpenPlex 1760119 · TMA1013243 | an individual | 9 Electronics | Registered | 2019 |
| 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 |
| OPENBASS 2245806 · design | Owner not listed | 9 Electronics | Pending | 2022 |
| OPENBEAM 2203588 | Mavenir Systems, Inc. | 9 Electronics38 Telecommunications | Pending | 2022 |
| OpenFlex 2129248 | BEE2LINK | 9 Electronics35 Advertising41 Education+1 | Pending | 2021 |
| OPENFLEX 2120670 · design | BEE2LINK | 9 Electronics35 Advertising41 Education+1 | Pending | 2021 |
| OPENBANK 2072858 · design | OPEN BANK, S.A. | 9 Electronics35 Advertising36 Finance+2 | Pending | 2020 |
| OPENFORM 2038250 | OpenRoad Auto Group Limited | 36 Finance37 Construction | Pending | 2020 |
| OPENBORDER 2257720 | OpenBorder Technologies Inc. | 9 Electronics | Pending | 2023 |
| OpenBooker 1957881 | BOOK4TIME INC. | 42 Science | Pending | 2019 |
| Openfit 2069724 · TMA1198595 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENFIT 1944149 · TMA1211535 | OPENFIT, LLC | 41 Education | Registered | 2023 |