| WelComb 1818902 · TMA1021900 | William V. MacGill & Co | 5 Pharmaceuticals10 Medical | Registered | 2019 |
| WELCOME 1726646 · TMA994832 | ABB Asea Brown Boveri Ltd. | 9 Electronics20 Furniture | Registered | 2018 |
| WELCYON 1531796 · TMA879589 | Welcyon, LLC | 28 Toys41 Education | Registered | 2014 |
| WELCOME 1345133 · TMA758596 | Epic Systems Corporation | 9 Electronics | Registered | 2010 |
| WELCOME 1123436 · TMA578954 · design | G6 Hospitality IP LLC | 43 Restaurants | Registered | 2003 |
| "WELCOME" 0991965 · NFLD1965 | A.H. MURRAY & COMPANY, LIMITED | 4 Oils | Registered | 1932 |
| WELCOME... 2372861 · design | RUSTY LANTERN MARKETS, LLC | 35 Advertising43 Restaurants | Pending | 2025 |
| WellZone 1914530 · TMA1124764 | WellFit Holding GmbH | 3 Cosmetics11 Lighting21 Housewares+3 | Registered | 2022 |
| WELLSONE 1874575 · TMA1049942 | Wells Fargo & Company | 36 Finance | Registered | 2019 |
| WELLCOME 0992893 · NFLD2893 | GLAXO GROUP LIMITED | 1 Chemicals3 Cosmetics5 Pharmaceuticals+2 | Registered | 1947 |
| "WELLCOME" 0196754 · UCA34096 | SmithKline Beecham Limited | 5 Pharmaceuticals | Registered | 1947 |
| WELLCOME 2243181 | ATH America LLC | 3 Cosmetics5 Pharmaceuticals | Pending | 2023 |
| WELLZONE 2222062 | S. J. ELECTRO SYSTEMS, INC. | 9 Electronics | Pending | 2022 |
| WELLZONE 2222061 · design | S. J. ELECTRO SYSTEMS, INC. | 9 Electronics | Pending | 2022 |
| WELCOMINNS 1208217 · TMA646171 | Cambridge Realty (Ottawa) Limited | 43 Restaurants | Registered | 2005 |
| WELSEND 2126832 · TMA1198859 · design | WELSEND Communication Industry Co. Ltd. | 38 Telecommunications | Registered | 2023 |
| WILSONS 1940954 · TMA1109022 · design | WILSON FUEL CO. LIMITED | 4 Oils35 Advertising37 Construction+5 | Registered | 2021 |
| WILSON 1816216 · TMA1005474 · design | BBB Industries, LLC, A Delaware Limited Liability Company | 7 Machines9 Electronics12 Vehicles | Registered | 2018 |
| WILSON 1699405 · TMA938157 · design | Premier Tech Ltée/Premier Tech Ltd. | 5 Pharmaceuticals21 Housewares28 Toys | Registered | 2016 |
| WILSON 1698561 · TMA918903 | SureWerx USA Inc. | 9 Electronics | Registered | 2015 |
| WILSON 1674767 · TMA912263 | Premier Tech Ltée/Premier Tech Ltd. | 5 Pharmaceuticals21 Housewares28 Toys | Registered | 2015 |
| WELLSON 1577230 · TMA930173 · design | WISDOM ELECTRONICS INC. | 6 Metal7 Machines8 Hand+12 | Registered | 2016 |
| WILSON 1368286 · TMA799415 · design | Ludorum Enterprises, Inc. | 8 Hand9 Electronics12 Vehicles+6 | Registered | 2011 |
| WILSON 1236909 · TMA648128 | Wilson Electronics, LLC (a Utah Corporation) | 9 Electronics | Registered | 2005 |
| WILSON 1225681 · TMA715299 · design | Wilson Logistics Inc. | 39 Transport | Registered | 2008 |