| OPTIMA3300 2225791 · TMA1252561 | Conair LLC | 9 Electronics | Registered | 2024 |
| OPTIMALIST 2210401 · TMA1241783 | Opscotch Canada Inc. | 18 Leather21 Housewares24 Textiles+1 | Registered | 2024 |
| OptimalRx 2200001 · TMA1238488 | an individual | 44 Medical | Registered | 2024 |
| OptiMaster 2126854 · TMA1240944 | LG Display Co., Ltd. | 9 Electronics | Registered | 2024 |
| OPTIMA 2034994 · TMA1144634 · design | Optima Contracting Limited | 6 Metal19 Building20 Furniture+1 | Registered | 2022 |
| OPTIMAIRO 1901547 · TMA1132486 · design | CATA Deutschland GmbH | 6 Metal11 Lighting17 Rubber+2 | Registered | 2022 |
| OPTIMA 1894160 · TMA1072287 | Midea America Corp. | 7 Machines | Registered | 2020 |
| OptimaFlex 1887502 · TMA1086297 | Owner not shown | 42 Science | Registered | 2020 |
| OPTIMAX 1865477 · TMA1028567 | CANADIAN BIO-SYSTEMS INC. | 5 Pharmaceuticals | Registered | 2019 |
| optimAIRo 1858915 · TMA1078708 | CATA Deutschland GmbH | 6 Metal11 Lighting17 Rubber+2 | Registered | 2020 |
| OPTIMAGE 1806328 · TMA1033685 | MEGASOFT Inc. | 9 Electronics42 Science | Registered | 2019 |
| Optimat 1756862 · TMA955027 | MATELAS RENE INC. | 20 Furniture | Registered | 2016 |
| OPTIMAX 1733686 · TMA952294 | Owner not shown | 9 Electronics37 Construction42 Science | Registered | 2016 |
| OPTIMAX 1727005 · TMA940576 | Garland Canada Inc. | 2 Paints17 Rubber19 Building | Registered | 2016 |
| OPTIMAS 1721358 · TMA993313 | Optimas OE Solutions, LLC | 6 Metal17 Rubber20 Furniture+1 | Registered | 2018 |
| OPTIMA 1713786 · TMA963120 | COMPRESSION TECHNOLOGY CORPORATION | 7 Machines35 Advertising37 Construction+2 | Registered | 2017 |
| OPTUM360° 1665718 · TMA1036437 | Optum, Inc. | 35 Advertising36 Finance | Registered | 2019 |
| OPTIMAL 1632959 · TMA889558 | NORTH LOCK LLC | 32 Beer | Registered | 2014 |
| OPTIMA 1608516 · TMA955037 | SUNOCO OVERSEAS, INC. | 4 Oils | Registered | 2016 |
| OPTIMA 1590329 · TMA879120 | Beckman Coulter, Inc. | 9 Electronics | Registered | 2014 |
| OPTIMUS360 1584021 · TMA879618 | Marine Canada Acquisition Inc. | 9 Electronics12 Vehicles | Registered | 2014 |
| OPTIMA 1578824 · TMA852451 | Master Plant-Prod Inc. | 1 Chemicals5 Pharmaceuticals | Registered | 2013 |
| OPTIMATRIX 1570877 · TMA909854 | American Regent, Inc. | 5 Pharmaceuticals | Registered | 2015 |
| OPTIMA 1546277 · TMA834779 · design | CPS Technology Holdings LLC | 9 Electronics | Registered | 2012 |
| OPTIMA 1531149 · TMA834780 | CPS Technology Holdings LLC | 9 Electronics | Registered | 2012 |