| ONWARD 2209229 · TMA1241704 | Chewy, Inc. | 31 Fresh | Registered | 2024 |
| ONART 2069840 · TMA1136652 | an individual | 7 Machines37 Construction | Registered | 2022 |
| ONROADS 2011247 · TMA1160943 | Lally Group Ltd. | 36 Finance | Registered | 2023 |
| ONEROOT 1880790 · TMA1064913 · design | Oneroot Inc. | 22 Ropes30 Coffee | Registered | 2019 |
| OMNIRAD 1768200 · TMA977498 | an individual | 1 Chemicals | Registered | 2017 |
| OMEROTIN 1749370 · TMA1039645 | Kuhnil Pharm. Co. Ltd. | 5 Pharmaceuticals | Registered | 2019 |
| ONEREIT 1741124 · TMA975588 · design | OneREIT | 36 Finance37 Construction | Registered | 2017 |
| ONEREIT 1741123 · TMA975582 | OneREIT | 36 Finance37 Construction | Registered | 2017 |
| OMNIRIDGE 1505791 · TMA820781 | LOMANCO, INC. | 19 Building | Registered | 2012 |
| ONROUTE 1464758 · TMA782177 · design | an individual | 39 Transport43 Restaurants | Registered | 2010 |
| ONWARD 1335166 · TMA711850 · design | Kabushiki Kaisha Onward Holdings (also trading as Onward Holdings Co. Ltd.) | 25 Clothing | Registered | 2008 |
| OMNIRATER 1258075 · TMA662802 | Applied Systems Canada Inc. | 42 Science | Registered | 2006 |
| ONWARD 0630311 · TMA368820 | an individual | 9 Electronics16 Paper35 Advertising+3 | Registered | 1990 |
| OHMART 0298984 · TMA153965 | THE OHMART CORPORATION | 9 Electronics | Registered | 1967 |
| onwords 2357215 | Owner not listed | 16 Paper | Pending | 2024 |
| ONROAD 2310075 · design | Owner not listed | 37 Construction39 Transport | Pending | 2024 |
| ONWARD 12 2278445 | Owner not listed | 19 Building | Pending | 2023 |
| ONRED 2261266 | an individual | 9 Electronics35 Advertising42 Science | Pending | 2023 |
| ONord 2247325 · design | Owner not listed | 9 Electronics | Pending | 2023 |
| ONWARD 2214436 | Meta Platforms, Inc. | 9 Electronics41 Education | Pending | 2022 |
| OMYRIDE 2119675 | Omyride Corporation | 9 Electronics39 Transport42 Science | Pending | 2021 |
| ONWARD 1936807 · design | DISNEY ENTERPRISES, INC. | 16 Paper25 Clothing28 Toys | Pending | 2018 |
| ONROUTEBC 0924627 | Her Majesty the Queen in right of the Province of British Colombia, as represented by the Minister of Advanced Education, Government Communications and Public Engagement | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2017 |
| ONWARD 0922248 | The City of Calgary | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2013 |
| 1884 ONWARD 1894 0900278 · design | The City of Calgary | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1976 |