| WELDCO 2002238 · TMA1105994 | Weldco Sales, Inc. | 12 Vehicles35 Advertising | Registered | 2021 |
| WELDCOR 1717609 · TMA950722 · design | WeldCor Supplies Inc. | 35 Advertising | Registered | 2016 |
| WeldCor 1717608 · TMA950720 | WeldCor Supplies Inc. | 35 Advertising | Registered | 2016 |
| WELDCAP 1629717 · TMA900386 | an individual | 9 Electronics | Registered | 2015 |
| WELDCOA 1297372 · TMA717445 | Welding Company of America | 6 Metal7 Machines9 Electronics+2 | Registered | 2008 |
| WELDCALL 0710047 · TMA418696 | THE ESAB GROUP, INC. | 42 Science | Registered | 1993 |
| WELDCO 0291636 · TMA145830 · design | AIR PRODUCTS CANADA LTD./ PRODAIR CANADA LTEE. | 7 Machines9 Electronics | Registered | 1966 |
| WILDCREEK 2260264 · TMA1279412 | CertainTeed LLC | 19 Building20 Furniture | Registered | 2024 |
| WELDCLOUD 1828202 · TMA1011765 | an individual | 42 Science | Registered | 2018 |
| WELDCLOUD 1828199 · TMA1011757 · design | an individual | 42 Science | Registered | 2018 |
| WELDCLASS 1690977 · TMA929908 | JWL Procurement Services Pty Ltd | 1 Chemicals6 Metal7 Machines+1 | Registered | 2016 |
| WELDCRAFT 1614573 · TMA889515 | RENAISSANCE MARINE GROUP, INC. | 12 Vehicles | Registered | 2014 |
| WELDSENSE 1518015 · TMA873520 | Associated Equipment Corporation | 7 Machines11 Lighting | Registered | 2014 |
| WELDGUARD 1140342 · TMA618557 | TURCK Inc. a Minnesota corporation | 9 Electronics | Registered | 2004 |
| WELDCRAFT 0733564 · TMA432061 | ILLINOIS TOOL WORKS INC. (A DELAWARE CORPORATION) | 7 Machines9 Electronics | Registered | 1994 |
| WELDSTUDS 0521544 · TMA318425 | Continental Decon Inc. | 6 Metal | Registered | 1986 |
| WILDSTAR 2249914 · TMA1280966 | Spin Master Ltd. | 28 Toys | Registered | 2025 |
| WEALTHSHARE 2220579 · TMA1248504 · design | WealthShare Inc. | 35 Advertising36 Finance37 Construction+1 | Registered | 2024 |
| WILDCREST 2220540 · TMA1279057 · design | an individual | 25 Clothing | Registered | 2024 |
| WILDGOOD 2186493 · TMA1285124 | WILDGOOD, INC. | 30 Coffee | Registered | 2025 |
| WealthIQ 2117045 · TMA1238108 | Canaccord Genuity Corp. | 16 Paper35 Advertising36 Finance+2 | Registered | 2024 |
| WEALTHSIGMA 2115133 · TMA1184015 | an individual | 36 Finance | Registered | 2023 |
| WEALTHOGREEN 2115063 · TMA1184004 · design | Wealthogreen | 7 Machines | Registered | 2023 |
| WallDeca 2086214 · TMA1168741 | 9666052 Canada Inc. | 16 Paper | Registered | 2023 |
| WELLDOC 2085239 · TMA1199986 | Welldoc, Inc. | 9 Electronics42 Science44 Medical | Registered | 2023 |