| OPENCAPI 1817988 · TMA1068290 | Compute Express Link Consortium, Inc. | 9 Electronics16 Paper35 Advertising | Registered | 2020 |
| OpenScape 1178563 · TMA677483 | Unify Software and Solutions GmbH & Co. KG | 9 Electronics | Registered | 2006 |
| OPENSOUND 2151099 · TMA1221351 · design | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| opensnow 2132268 · TMA1232143 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| OPENCOACH 2132251 · TMA1232140 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| OPENSPORT 2101702 · TMA1173887 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| openswim 2056371 · TMA1198550 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OpenComm 2052258 · TMA1198534 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENCOLO 2015454 · TMA1185807 | Energy Group Networks LLC | 38 Telecommunications42 Science | Registered | 2023 |
| opensrci 1990414 · TMA1126966 | an individual | 36 Finance | Registered | 2022 |
| OPENSPACE 1702991 · TMA928586 | LOGIX ITS INC. | 9 Electronics19 Building | Registered | 2016 |
| OPENSPARC 1304573 · TMA837815 | SPARC INTERNATIONAL, INC. | 9 Electronics16 Paper | Registered | 2012 |
| OPENSPIRIT 0885397 · TMA549474 · design | Cloud Software Group, Inc. | 9 Electronics | Registered | 2001 |
| OpenSPR 2315273 | Nicoya Lifesciences, Inc. | 1 Chemicals42 Science | Pending | 2024 |
| OPENSUMI 2235367 | Owner not listed | 9 Electronics42 Science | Pending | 2021 |
| OPENCBDC 2222658 | an individual | 9 Electronics36 Finance41 Education+2 | Pending | 2022 |
| OPENSTORE 2133136 | Miami Labs, Inc. | 9 Electronics35 Advertising36 Finance+1 | Pending | 2021 |
| OPENSCREEN 2093062 | Openscreen Inc. | 35 Advertising42 Science | Pending | 2021 |
| OpenSPR 2015127 | Nicoya Lifesciences, Inc. | 9 Electronics | Pending | 2020 |
| OPENSCALE 1965938 | INTERNATIONAL BUSINESS MACHINES CORPORATION | 9 Electronics35 Advertising42 Science | Pending | 2019 |
| OPENSOLAR 1955224 | OpenSolar Pty Ltd. | 9 Electronics35 Advertising42 Science | Pending | 2019 |
| OPENCOMPANY 1698709 · TMA932187 · design | GLASSDOOR, INC. | 35 Advertising | Registered | 2016 |
| OPENCOMPANY 1698707 · TMA931680 | GLASSDOOR, INC. | 35 Advertising | Registered | 2016 |
| OPENCLINICA 1457286 · TMA778374 | Akaza Research LLC | 9 Electronics41 Education42 Science | Registered | 2010 |
| OPENSOLARIS 1253288 · TMA794683 | Oracle America, Inc. | 7 Machines9 Electronics41 Education+1 | Registered | 2011 |