| OPTIPURE 1578085 · TMA944280 | Plaxica Limited | 1 Chemicals40 Treatment42 Science | Registered | 2016 |
| OPTIPURE 0854109 · TMA534029 | Kenko International, Inc. | 5 Pharmaceuticals | Registered | 2000 |
| OPTIPUR 1284523 · TMA772358 | an individual | 1 Chemicals | Registered | 2010 |
| OPTIPORE 0780877 · TMA469893 | ConvaTec Inc. | 10 Medical | Registered | 1997 |
| OPTIPULSE 2170770 | Compedica Holdings Limited (f/k/a DBC Medical IOM Limited) | 10 Medical42 Science | Pending | 2022 |
| Optave 2252460 · TMA1271440 | an individual | 9 Electronics35 Advertising41 Education+1 | Registered | 2024 |
| OptiPrep 2139843 · TMA1246208 | an individual | 1 Chemicals5 Pharmaceuticals | Registered | 2024 |
| OPTIFIRE 1832906 · TMA1076986 | PRAXAIR TECHNOLOGY, INC. | 6 Metal11 Lighting17 Rubber+3 | Registered | 2020 |
| OPTAPAD 1788561 · TMA1026450 | an individual | 9 Electronics | Registered | 2019 |
| OPTIPRO 1672093 · TMA928444 | Owner not shown | 5 Pharmaceuticals | Registered | 2016 |
| OPTBLUE 1672043 · TMA923846 | American Express Marketing & Development Corp. | 36 Finance | Registered | 2015 |
| OptiPro 1436770 · TMA846902 | VIPAR HEAVY DUTY, INC. | 12 Vehicles | Registered | 2013 |
| OPTIPRO 1370192 · TMA778784 | Corn Products Development, Inc. | 1 Chemicals | Registered | 2010 |
| OPTOPIPE 1157496 · TMA613576 | DIALIGHT CORPORATION | 9 Electronics | Registered | 2004 |
| OPTIPAR 2278216 | Owner not listed | 9 Electronics11 Lighting37 Construction+1 | Pending | 2023 |
| OptiPave 2221643 | OptiPave, LLC | 42 Science | Pending | 2022 |
| OPHTAPHARM 2272779 · design | Owner not listed | 5 Pharmaceuticals9 Electronics10 Medical+2 | Pending | 2023 |
| OPHTAPHARM 2272777 | an individual | 5 Pharmaceuticals9 Electronics10 Medical+2 | Pending | 2023 |
| OPTABLATE 2126765 · TMA1173951 | STRYKER CORPORATION | 10 Medical | Registered | 2023 |
| OPTIPRIME 2105308 · TMA1201335 | Pixelle Specialty Solutions LLC | 16 Paper | Registered | 2023 |
| OPTOPROBE 1728869 · TMA945837 · design | SUMMERYUTIME Technology (Beijing) Co. Ltd. | 1 Chemicals10 Medical | Registered | 2016 |
| Optiforme 1680404 · TMA907219 | Québec 9177-4398 Inc. | 41 Education | Registered | 2015 |
| optipower 1596258 · TMA888692 | an individual | 9 Electronics | Registered | 2014 |
| OPTIVERSE 2307965 | an individual | 9 Electronics35 Advertising38 Telecommunications+3 | Pending | 2023 |
| OPTIPLACE 2230747 | an individual | 9 Electronics39 Transport42 Science | Pending | 2022 |