| OKAN 2171628 · TMA1169173 | SAULE LLC | 9 Electronics | Registered | 2023 |
| Okona 2095271 · TMA1174772 | 15331331 Canada Inc. | 18 Leather22 Ropes24 Textiles+2 | Registered | 2023 |
| Oson 2093858 · TMA1171433 | an individual | 25 Clothing | Registered | 2023 |
| OXON 2061083 · TMA1144835 | an individual | 12 Vehicles | Registered | 2022 |
| Oecon 2005983 · TMA1140355 | Shenzhen Lejianshang Technology Co. Ltd. | 25 Clothing | Registered | 2022 |
| OKGN 1922461 · TMA1106448 | Okanagan Lifestyle Apparel Inc. | 9 Electronics14 Jewellery16 Paper+16 | Registered | 2021 |
| OCION 1765266 · TMA973413 | Ocion Water Science Inc. | 1 Chemicals | Registered | 2017 |
| OJON 1588248 · TMA860805 | ORIGINS NATURAL RESOURCES INC. | 1 Chemicals | Registered | 2013 |
| OXEON 1438827 · TMA784835 · design | OldCastle Building Products Canada, Inc. | 1 Chemicals17 Rubber | Registered | 2010 |
| OJON 1248975 · TMA664139 | ORIGINS NATURAL RESOURCES INC. | 3 Cosmetics26 Sewing | Registered | 2006 |
| OJON 1248973 · TMA664072 · design | ORIGINS NATURAL RESOURCES INC. | 3 Cosmetics26 Sewing | Registered | 2006 |
| OKGN 2046265 | Okanagan Lifestyle Apparel Inc. | 28 Toys32 Beer33 Wine+1 | Pending | 2020 |
| OSNO 2265566 · TMA1284961 | 3097-1238 Quebec Inc. | 25 Clothing35 Advertising | Registered | 2025 |
| OSHIN 2256373 · TMA1283028 | Suzhou rizi office & stationery co.ltd | 16 Paper | Registered | 2025 |
| OZANI 2249197 · TMA1267376 | an individual | 14 Jewellery35 Advertising | Registered | 2024 |
| Oxumii 2245480 · TMA1264436 | Guangzhou Xumiao Electronic Commerce Co. Ltd. | 9 Electronics | Registered | 2024 |
| Océane 2208012 · TMA1248183 | MX PRODUCTS INC | 7 Machines11 Lighting | Registered | 2024 |
| OASMU 2206570 · TMA1241415 | SHENZHEN FENJUN INFORMATION TECHNOLOGY CO.LTD | 20 Furniture | Registered | 2024 |
| OZMO 2183638 · TMA1284455 | Owner not shown | 30 Coffee | Registered | 2025 |
| OGIMA 2166433 · TMA1246331 | Shenzhen Taomatou E-Commerce Co., Ltd. | 3 Cosmetics21 Housewares | Registered | 2024 |
| OSHEN 2165995 · TMA1212472 | OSHEN Housewares Corp. | 18 Leather21 Housewares | Registered | 2023 |
| OSSION 2161435 · TMA1211173 | Owner not shown | 3 Cosmetics5 Pharmaceuticals | Registered | 2023 |
| OCEANO 2159991 · TMA1285122 · design | Owner not shown | 16 Paper18 Leather21 Housewares+5 | Registered | 2025 |
| OCUM 2155536 · TMA1187882 | N.B. Automation inc. | 42 Science | Registered | 2023 |
| OKAWANY 2149007 · TMA1203133 · design | an individual | 18 Leather | Registered | 2023 |