| OPTICO 1651805 · TMA907814 | BuildDirect.com Technologies Inc. | 19 Building | Registered | 2015 |
| OPTION 1525699 · TMA848058 · design | BOUTIQUE OPTION INC. | 35 Advertising | Registered | 2013 |
| OPTION 1491608 · TMA868729 | Argon Medical Devices, Inc. | 10 Medical | Registered | 2014 |
| OPTIMO 1350690 · TMA754996 | Kingspan Holdings (IRL) Limited | 6 Metal17 Rubber | Registered | 2009 |
| OPTION 1310278 · TMA746297 | an individual | 3 Cosmetics | Registered | 2009 |
| OPTION 1107722 · TMA608182 | an individual | 5 Pharmaceuticals | Registered | 2004 |
| OPTICO 0881795 · TMA514472 | DEVONSHIRE DISTRIBUTORS LIMITED | 5 Pharmaceuticals9 Electronics | Registered | 1999 |
| OPTIMO 0780502 · TMA464342 · design | an individual | 7 Machines8 Hand9 Electronics+2 | Registered | 1996 |
| OPTION + 0566982 · TMA344294 · design | Corporation Groupe Pharmessor/Pharmessor Group Corporation | 3 Cosmetics5 Pharmaceuticals8 Hand+7 | Registered | 1988 |
| OPTION 0531508 · TMA321319 | Corporation Groupe Pharmessor/Pharmessor Group Corporation | 3 Cosmetics | Registered | 1986 |
| OPTIMO 0244851 · TMA111221 | House of Horvath Inc. | 34 Tobacco | Registered | 1958 |
| OPTIMO 2342639 · design | HANKOOK & COMPANY CO. LTD. | 12 Vehicles | Pending | 2024 |
| OPTIOM 2331497 · design | Optiom Inc. | 9 Electronics16 Paper35 Advertising+2 | Pending | 2024 |
| OPTIOM 2331496 · design | Optiom Inc. | 9 Electronics16 Paper35 Advertising+2 | Pending | 2024 |
| OPTIOM 2331489 | Optiom Inc. | 9 Electronics16 Paper35 Advertising+2 | Pending | 2024 |
| OPTIMO 2304645 | Owner not listed | 9 Electronics16 Paper42 Science | Pending | 2023 |
| OPTION+ 1965968 · design | Corporation Groupe Pharmessor/Pharmessor Group Corporation | 1 Chemicals2 Paints3 Cosmetics+20 | Pending | 2019 |
| OPTION + 1965966 | Corporation Groupe Pharmessor/Pharmessor Group Corporation | 1 Chemicals2 Paints3 Cosmetics+21 | Pending | 2019 |
| OPTIK 2183528 · TMA1272581 | Sandvik Limited | 9 Electronics42 Science | Registered | 2024 |
| OPTIQ 2041019 · TMA1164437 | General Motors LLC | 12 Vehicles | Registered | 2023 |
| OPTIX 2024178 · TMA1158864 · design | HUAWEI TECHNOLOGIES CO., LTD. | 9 Electronics | Registered | 2023 |
| OPTIQ 1961719 · TMA1230812 | an individual | 9 Electronics | Registered | 2024 |
| OPTIX 1921873 · TMA1106718 | Plaskolite, LLC | 17 Rubber19 Building | Registered | 2021 |
| OPTIV 1728538 · TMA1130952 · design | OPTIV PARENT INC. (Delaware) | 9 Electronics35 Advertising37 Construction+3 | Registered | 2022 |
| OPTIV 1722065 · TMA1130950 | OPTIV PARENT INC. (Delaware) | 9 Electronics35 Advertising37 Construction+3 | Registered | 2022 |