| OPENRL 1506797 · TMA866553 | Imagination Technologies Limited | 9 Electronics | Registered | 2013 |
| openrad 2183847 | an individual | 9 Electronics35 Advertising38 Telecommunications+2 | Pending | 2022 |
| OPENARCH 2170005 · TMA1241127 · design | an individual | 9 Electronics11 Lighting | Registered | 2024 |
| OPENRACE 2118191 · TMA1250781 · design | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |
| OPENROAD 1541371 · TMA896754 | Open Road Releasing, LLC | 41 Education | Registered | 2015 |
| OPENROAD 1190907 · TMA624637 | OpenRoad Auto Group Limited | 35 Advertising37 Construction | Registered | 2004 |
| OPENROAD 0751731 · TMA451150 | Actian Corporation | 9 Electronics | Registered | 1995 |
| OPENREEL 2132567 | ClearDoc, Inc. | 9 Electronics42 Science | Pending | 2021 |
| Ofenrd 2054224 · TMA1152979 | an individual | 9 Electronics | Registered | 2022 |
| OpenArk 1939804 · TMA1121225 | MediQuant, LLC | 9 Electronics | Registered | 2022 |
| OPENER 1921743 · TMA1106207 | Pivotal Aero, LLC | 12 Vehicles18 Leather21 Housewares+1 | Registered | 2021 |
| OPENAIR 1883820 · TMA1085599 | NetSuite Inc. | 35 Advertising42 Science | Registered | 2020 |
| OPENAIR 1644043 · TMA891694 | Visteon Corporation | 12 Vehicles | Registered | 2014 |
| OPENERP 1537391 · TMA864787 | an individual | 9 Electronics35 Advertising41 Education+1 | Registered | 2013 |
| OPENAIR 1102445 · TMA608140 | PlasmaTreat GmbH | 1 Chemicals2 Paints6 Metal+2 | Registered | 2004 |
| OpenAir 0841218 · TMA496543 | an individual | 9 Electronics | Registered | 1998 |
| OPENWORKS 1105830 · TMA586889 | Landmark Graphics Corporation (a Delaware Corporation) | 9 Electronics | Registered | 2003 |
| OPENRESTY 1990366 | OPENRESTY INC. | 9 Electronics42 Science | Pending | 2019 |
| OPENHARMONY 2092708 · TMA1207197 · design | OPENATOM FOUNDATION | 9 Electronics42 Science | Registered | 2023 |
| OPENROAMING 2024517 | Cisco Technology, Inc. | 9 Electronics42 Science | Pending | 2020 |
| OPENHEAR 2131034 · TMA1225131 | SHOKZ (SINGAPORE) PTE. LTD. | 10 Medical | Registered | 2024 |
| OVEYNERSIN 2090133 · TMA1186092 · design | Shenzhen Shisheng Century Technology Co. Ltd | 20 Furniture | Registered | 2023 |
| OPMIRIC 2046833 · TMA1149128 | Astellas Gene Therapies, Inc. | 5 Pharmaceuticals | Registered | 2022 |
| OVHmarket 1893576 · TMA1098929 | an individual | 9 Electronics35 Advertising36 Finance+5 | Registered | 2021 |
| OPENMARKET 1841331 · TMA1104621 · design | OpenMarket Inc. | 35 Advertising36 Finance38 Telecommunications+1 | Registered | 2021 |