| OPTIMISM 1811292 · TMA992215 | Definity Insurance Company | 36 Finance | Registered | 2018 |
| OPTIMISM 2260440 | THE OPTIMISM FOUNDATION | 42 Science | Pending | 2023 |
| OPTIMIST 1964304 · TMA1231872 | an individual | 25 Clothing | Registered | 2024 |
| OPTIMISO 1291500 · TMA730327 | Optimiso Group SA | 9 Electronics35 Advertising38 Telecommunications+3 | Registered | 2008 |
| OPTIMISTE 1040973 · TMA559870 | Owner not shown | 3 Cosmetics10 Medical | Registered | 2002 |
| OPTIMSM 1023279 · TMA570843 | CARDINAL ASSOCIATES, INC. a legal entity | 5 Pharmaceuticals | Registered | 2002 |
| OPTIMIST 0460033 · TMA259052 | an individual | 2 Paints3 Cosmetics6 Metal+15 | Registered | 1981 |
| OPTIMIUM 2301986 · design | PowerUp | 9 Electronics12 Vehicles37 Construction+2 | Pending | 2023 |
| OPTIMUS 2256065 · TMA1277637 · design | Owner not shown | 34 Tobacco | Registered | 2024 |
| OptiMicro 2081705 · TMA1166983 | OptiMicro Technologies, Inc. | 42 Science | Registered | 2023 |
| OPTIMI 2051920 · TMA1217931 | Optimi Health Corp. | 1 Chemicals5 Pharmaceuticals30 Coffee+1 | Registered | 2024 |
| OPTIMUS 1965219 · TMA1117298 | 6991165 CANADA INC. | 6 Metal9 Electronics | Registered | 2022 |
| OPTIMUS 1961213 · TMA1250375 | Diversey, Inc. | 9 Electronics21 Housewares | Registered | 2024 |
| OPTIMUS 1913353 · TMA1092937 | NAC International, Inc. | 6 Metal | Registered | 2021 |
| OPTIMUM 1828757 · TMA1065623 · design | an individual | 9 Electronics44 Medical | Registered | 2019 |
| OPTIMUM 1814832 · TMA1021540 | Wilbar International, Inc. | 6 Metal19 Building | Registered | 2019 |
| OPTIMIXX 1746180 · TMA959226 | LALEMA INC. | 9 Electronics11 Lighting35 Advertising+6 | Registered | 2017 |
| OPTIMIND 1745039 · TMA958076 | AlternaScript LLC | 5 Pharmaceuticals | Registered | 2016 |
| OPTIMUS 1740152 · TMA947236 | SanDisk LLC | 35 Advertising | Registered | 2016 |
| OPTIMAS 1721358 · TMA993313 | Optimas OE Solutions, LLC | 6 Metal17 Rubber20 Furniture+1 | Registered | 2018 |
| OPTIMUS 1711033 · TMA983558 | Masonite International Corporation | 6 Metal19 Building | Registered | 2017 |
| OPTIMUS 1663249 · TMA962208 | CENTUM Financial Group Inc. | 36 Finance41 Education | Registered | 2017 |
| OPTIMUS 1649908 · TMA1054705 | The Sherwin-Williams Company | 2 Paints | Registered | 2019 |
| OPTIMUS 1640815 · TMA921757 | SanDisk LLC | 9 Electronics | Registered | 2015 |
| OPTIMOS 1631453 · TMA887439 | TELEDYNE DIGITAL IMAGING, INC. | 9 Electronics | Registered | 2014 |