| WATERSHED 2049345 · TMA1164546 | Watershed Technology, Inc. | 9 Electronics42 Science | Registered | 2023 |
| WATERSHED 1718301 · TMA1002824 · design | SanEcoTec Ltd. | 11 Lighting | Registered | 2018 |
| WATERSHED 1708594 · TMA1028876 | 1016563 B.C. LTD. | 3 Cosmetics6 Metal8 Hand+23 | Registered | 2019 |
| WATERSWIM 1536350 · TMA848306 · design | an individual | 25 Clothing | Registered | 2013 |
| WATERSHED 1509700 · TMA830342 | INTERNATIONAL PAPER COMPANY | 16 Paper | Registered | 2012 |
| WATERSHED 1119743 · TMA624643 | Weyerhaeuser NR Company | 19 Building | Registered | 2004 |
| WATERSHED 0609050 · TMA358805 | SanEcoTec Ltd. | 1 Chemicals11 Lighting | Registered | 1989 |
| WATERSHED 2311658 | Watershed Distillery, LLC | 33 Wine | Pending | 2023 |
| WATERSHED 2309241 | Watershed Technology, Inc. | 35 Advertising | Pending | 2023 |
| WATERSHED 2258225 | Owner not listed | 9 Electronics16 Paper35 Advertising+2 | Pending | 2023 |
| WATERSHIELD 1996570 · TMA1255869 | GOODMORNING.COM INC. | 20 Furniture24 Textiles35 Advertising | Registered | 2024 |
| WATERSHIELD 1472864 · TMA845690 | Legalett Canada Inc. | 9 Electronics14 Jewellery16 Paper+4 | Registered | 2013 |
| WaterShield 1289931 · TMA757981 | TAIYO YUDEN CO., LTD. | 9 Electronics | Registered | 2010 |
| WATERSHEDZ 2148445 | an individual | 1 Chemicals | Pending | 2021 |
| WATERHOG 2247979 · TMA1267237 | Mountville Mills, Inc. | 27 Carpets | Registered | 2024 |
| WATERCOIN 1915396 · TMA1120083 | AQUA-INDEX LTD. | 36 Finance | Registered | 2022 |
| WATERS 1846068 · TMA1095044 | Waters Technologies Corporation | 1 Chemicals9 Electronics35 Advertising+3 | Registered | 2021 |
| WATERSIDE 1824296 · TMA1024605 | an individual | 16 Paper44 Medical | Registered | 2019 |
| WATERSEER 1813835 · TMA996108 · design | Shanghai Trustech Technology Development Co. Ltd | 10 Medical11 Lighting21 Housewares | Registered | 2018 |
| WATERSYS 1611815 · TMA904039 | Procesco Inc. | 6 Metal7 Machines9 Electronics+3 | Registered | 2015 |
| WATERS 1555881 · TMA861749 | Waters Technologies Corporation | 1 Chemicals9 Electronics37 Construction | Registered | 2013 |
| WATERCOP 1420198 · TMA758672 | ENTREPRISES WATERCOP CANADA INC./ WATERCOP CANADA ENTREPRISES INC. | 35 Advertising | Registered | 2010 |
| WATERSOFT 0844789 · TMA490916 · design | B.V. WATERSOFT B.C. LTD. | 1 Chemicals7 Machines11 Lighting+4 | Registered | 1998 |
| WATERSCAPES 1631091 · TMA886013 | Mattamy (Monarch) Limited | 36 Finance37 Construction | Registered | 2014 |
| WATERSPRINT 2368256 | an individual | 9 Electronics11 Lighting35 Advertising+1 | Pending | 2024 |