| ORENDA 1646314 · TMA909528 | Magellan Aerospace Limited | 7 Machines16 Paper37 Construction | Registered | 2015 |
| ORENDA 1215055 · TMA658964 | Orenda Automation Technologies Inc. | 7 Machines35 Advertising40 Treatment+1 | Registered | 2006 |
| ORENDA 0768635 · TMA467473 | Magellan Aerospace Limited | 7 Machines12 Vehicles16 Paper | Registered | 1996 |
| ORENDA 0768634 · TMA486529 · design | Magellan Aerospace Limited | 7 Machines12 Vehicles16 Paper | Registered | 1997 |
| ORENDA 0758674 · TMA485525 | an individual | 35 Advertising36 Finance41 Education+1 | Registered | 1997 |
| ORANET 0751262 · TMA441635 | LALEMA INC. | 3 Cosmetics | Registered | 1995 |
| ORENDA 0295694 · TMA149140 · design | Magellan Aerospace Limited | 7 Machines9 Electronics37 Construction+1 | Registered | 1967 |
| ORENDA 2288746 | KRUEGER INTERNATIONAL, INC. | 20 Furniture | Pending | 2023 |
| Orenda 2010782 | Inter Cosmetiques Inc. | 3 Cosmetics5 Pharmaceuticals | Pending | 2020 |
| ORIMADE 2086500 · TMA1168763 | Owner not shown | 21 Housewares | Registered | 2023 |
| ORMedGuide 2080617 · TMA1284112 | an individual | 9 Electronics44 Medical | Registered | 2025 |
| ORAMD 2021624 · TMA1167679 | Trusted Health Products, Inc. | 3 Cosmetics21 Housewares | Registered | 2023 |
| ORMETRICS 1995615 · TMA1121628 | an individual | 9 Electronics35 Advertising42 Science | Registered | 2022 |
| ORIENT 1954109 · TMA1226417 · design | an individual | 29 Meat30 Coffee | Registered | 2024 |
| OUIAREMTL 1938619 · TMA1144044 | an individual | 18 Leather21 Housewares25 Clothing | Registered | 2022 |
| ORIENTEE 1902027 · TMA1077670 · design | an individual | 43 Restaurants | Registered | 2020 |
| ORIANTHA 1812688 · TMA1027029 | AbbVie Inc. | 5 Pharmaceuticals | Registered | 2019 |
| ORNATIVE 1798636 · TMA1022044 | ORNATIVE TABLEWARE INC. | 8 Hand21 Housewares24 Textiles | Registered | 2019 |
| ORONDIS 1785719 · TMA975673 · design | an individual | 5 Pharmaceuticals | Registered | 2017 |
| ORIENTO 1739363 · TMA960071 | TAOUTEL CANADA INC. | 34 Tobacco | Registered | 2017 |
| ORONDIS 1712606 · TMA964819 | an individual | 5 Pharmaceuticals | Registered | 2017 |
| ORIENTAL 1622665 · TMA1002380 | DECOR GRATES INCORPORATED | 11 Lighting | Registered | 2018 |
| ORIENT 1599934 · TMA870046 · design | Orient Fan Company | 11 Lighting | Registered | 2014 |
| OrientXpress 1582285 · TMA904694 | Owner not shown | 7 Machines37 Construction40 Treatment | Registered | 2015 |
| OrientAction 1484952 · TMA840073 | CERIC | 35 Advertising38 Telecommunications41 Education | Registered | 2013 |