| WESTRONIC 2097206 | Westronic Inc. | 9 Electronics35 Advertising37 Construction+1 | Pending | 2021 |
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| WesternPremium 1523156 · TMA875150 | International Raw Materials, Ltd. | 1 Chemicals | Registered | 2014 |
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| WESTHROID 2264262 · TMA1284832 | SPUD Holdings, LLC | 5 Pharmaceuticals | Registered | 2025 |
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| WESTERNACHER 2151408 · TMA1214404 | Owner not shown | 9 Electronics35 Advertising41 Education+2 | Registered | 2023 |
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| WESTROCK 1732931 · TMA964492 · design | WESTROCK SHARED SERVICES, LLC | 1 Chemicals6 Metal7 Machines+7 | Registered | 2017 |
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| WESTROCK 1726903 · TMA956436 | WESTROCK SHARED SERVICES, LLC | 1 Chemicals6 Metal7 Machines+7 | Registered | 2016 |
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| WESTROCK 1479097 · TMA843465 | Westrock Diamonds Inc. | 14 Jewellery25 Clothing35 Advertising+4 | Registered | 2013 |
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| WESTERN 1380293 · TMA792483 | DOUGLAS DYNAMICS, LLC (a Delaware Limited Liability Company) | 7 Machines8 Hand | Registered | 2011 |
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| WESTRUMITE. 0990157 · NFLD157 | an individual | 3 Cosmetics | Registered | 1903 |
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| WESTERN 649 0921875 | WESTERN CANADA LOTTERY CORPORATION | All goods and services | Protected | 2012 |
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| WESTERNU 0921616 | THE UNIVERSITY OF WESTERN ONTARIO | All goods and services | Protected | 2012 |
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| WESTERN 0903775 | THE BOARD OF GOVERNORS, THE UNIVERSITY OF WESTERN ONTARIO | All goods and services | Protected | 1989 |
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| WESTERN 0505942 · TMA292655 · design | WESTERN PIZZA & BAR-B-Q CHICKEN (1979) LTD. | 29 Meat30 Coffee | Registered | 1984 |
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| WESTERN 0304217 · TMA154999 · design | OLIN CORPORATION | 13 Firearms21 Housewares28 Toys | Registered | 1968 |
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| WESTERN 0201521 · UCA32966 | OLIN CORPORATION | 13 Firearms | Registered | 1948 |
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| WESTERN 0158534 · TMDA57079 | OLIN CORPORATION | 13 Firearms | Registered | 1933 |
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| WESTERNBREEZE 0875151 · TMA529894 | Life Technologies Corporation | 1 Chemicals5 Pharmaceuticals9 Electronics | Registered | 2000 |
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| WESTERLY 2055958 · TMA1182441 | RESIDENCES OF WESTERLY INC. | 36 Finance37 Construction42 Science | Registered | 2023 |
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| WesternFreedom 2002631 · TMA1127155 | 2226094 Alberta Ltd. | 30 Coffee32 Beer | Registered | 2022 |
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| WASTEWORKS 1993565 · TMA1120282 | Carolina Software Inc. | 9 Electronics | Registered | 2022 |
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| WESTERLY 1985010 · TMA1135492 | AS America, Inc. | 11 Lighting | Registered | 2022 |
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| WESTROSE 1858498 · TMA1017102 | 9359-4547 QUÉBEC INC. | 30 Coffee35 Advertising43 Restaurants | Registered | 2019 |
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| WISTERIA 1780912 · TMA981175 | DAVID YURMAN IP LLC | 14 Jewellery35 Advertising | Registered | 2017 |
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| WISTERIA 1598097 · TMA868462 | Les Produits Neptune Inc. | 11 Lighting | Registered | 2014 |
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| WESTERRA 1526433 · TMA822060 | an individual | 37 Construction | Registered | 2012 |
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