| OPENSEARCH 2133027 | Amazon Technologies, Inc. | 9 Electronics42 Science | Pending | 2021 |
| OPENSPORT 2101702 · TMA1173887 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
| OPENSPACE 1702991 · TMA928586 | LOGIX ITS INC. | 9 Electronics19 Building | Registered | 2016 |
| OPENSHARE 1609719 · TMA893368 | ONCARD MARKETING, INC. DBA REVTRAX | 35 Advertising42 Science | Registered | 2015 |
| OpenSPR 2315273 | Nicoya Lifesciences, Inc. | 1 Chemicals42 Science | Pending | 2024 |
| OpenSPR 2015127 | Nicoya Lifesciences, Inc. | 9 Electronics | Pending | 2020 |
| OPENSPIRIT 0885397 · TMA549474 · design | Cloud Software Group, Inc. | 9 Electronics | Registered | 2001 |
| openspeed 2132262 · TMA1232141 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| OPENSAFE 2131045 · TMA1239471 | SHOKZ HOLDING LIMITED | 10 Medical | Registered | 2024 |
| OPENSEA 2099944 · TMA1201319 | Greensea Systems, Inc. | 9 Electronics | Registered | 2023 |
| OpenStage 2097913 · TMA1272365 | Liebherr-Hausgeräte GmbH | 11 Lighting | Registered | 2024 |
| OPENGEAR 2053623 · TMA1201150 | Digi International Inc. | 9 Electronics42 Science | Registered | 2023 |
| opensrci 1990414 · TMA1126966 | an individual | 36 Finance | Registered | 2022 |
| OPENSEA 1945585 · TMA1223347 | Ozone Networks, Inc. | 35 Advertising42 Science | Registered | 2024 |
| OPENCARE 1894513 · TMA1106760 | Opencare Inc. | 35 Advertising42 Science | Registered | 2021 |
| OPENSURE 1771418 · TMA1032251 | Boston Scientific Scimed, Inc. | 10 Medical | Registered | 2019 |
| OPENSTACK 1697565 · TMA975142 | OpenStack Foundation, a non-stock, non profit corporation | 35 Advertising41 Education | Registered | 2017 |
| OPENCAR 1621556 · TMA1030344 | INRIX, Inc. | 9 Electronics42 Science | Registered | 2019 |
| OPENSWAN 1559719 · TMA873857 · design | Xelerance Corporation | 9 Electronics42 Science | Registered | 2014 |
| OPENGEAR 1311248 · TMA709287 | ROSS VIDEO LIMITED | 9 Electronics | Registered | 2008 |
| OpenScape 1178563 · TMA677483 | Unify Software and Solutions GmbH & Co. KG | 9 Electronics | Registered | 2006 |
| OPENSEA 2178940 | Ozone Networks, Inc. | 6 Metal9 Electronics14 Jewellery+10 | Pending | 2022 |
| OPENSTORE 2133136 | Miami Labs, Inc. | 9 Electronics35 Advertising36 Finance+1 | Pending | 2021 |
| OPENSCALE 1965938 | INTERNATIONAL BUSINESS MACHINES CORPORATION | 9 Electronics35 Advertising42 Science | Pending | 2019 |
| OPENSOLAR 1955224 | OpenSolar Pty Ltd. | 9 Electronics35 Advertising42 Science | Pending | 2019 |