| DEXWARE 1005582 · TMA556897 | an individual | 42 Science | Registered | 2002 |
| DEXCARE 2214630 | The Dow Chemical Company | 1 Chemicals | Pending | 2022 |
| DEXCARE 2214627 | The Dow Chemical Company | 1 Chemicals | Pending | 2022 |
| DEXERA 2260269 · TMA1279415 · design | Voyage Building Products Inc. | 6 Metal19 Building | Registered | 2024 |
| DEXERO 1396842 · TMA753707 · design | Dexero inc. | 9 Electronics42 Science | Registered | 2009 |
| DEXORY 2310485 · design | Owner not listed | 7 Machines9 Electronics35 Advertising+1 | Pending | 2023 |
| DEXORY 2274248 | DEXORY LIMITED | 7 Machines9 Electronics35 Advertising+1 | Pending | 2023 |
| DXR 1613652 · TMA930185 | Green On Industries Inc. | 1 Chemicals | Registered | 2016 |
| DXR 1398672 · TMA761819 | Ground Effects Environmental Services Inc. | 1 Chemicals6 Metal7 Machines+4 | Registered | 2010 |
| DUCAR 1315381 · TMA721208 | MTI Canada inc. | 7 Machines35 Advertising | Registered | 2008 |
| DXR 1287953 · TMA716115 · design | SHIMANO INC. | 12 Vehicles | Registered | 2008 |
| DECOR 0488274 · TMA298251 | THE DECOR CORPORATION PTY. LTD. | 8 Hand9 Electronics11 Lighting+2 | Registered | 1984 |
| DÉCOR 0424514 · TMA241331 · design | Hunter Douglas Canada Holdings Inc. | 9 Electronics20 Furniture | Registered | 1980 |
| DECOR 0271585 · TMA130994 | CASCADES CANADA ULC | 16 Paper24 Textiles | Registered | 1963 |
| DEKOR 2101805 | JANIBELL, INC. | 20 Furniture21 Housewares | Pending | 2021 |
| DEKIRU 2158847 · TMA1209946 | Owner not shown | 19 Building | Registered | 2023 |
| DUcare 2133514 · TMA1212021 | Shenzhen FengYiTang Technology Co. Ltd | 21 Housewares | Registered | 2023 |
| DUcare 2133355 · TMA1212007 | Shenzhen FengYiTang Technology Co. Ltd | 3 Cosmetics | Registered | 2023 |
| DEEZER 1995726 · TMA1216727 · design | DEEZER | 9 Electronics38 Telecommunications41 Education | Registered | 2024 |
| DESIRE 1955137 · TMA1262141 | Harlequin Enterprises ULC | 9 Electronics16 Paper41 Education | Registered | 2024 |
| DEOGRA 1868374 · TMA1052340 · design | SHENZHEN DEOGRA ELECTRICAL CO. LTD. | 8 Hand10 Medical11 Lighting+2 | Registered | 2019 |
| DECHRA 1764593 · TMA1011952 | Dechra Pharmaceuticals Limited | 5 Pharmaceuticals10 Medical31 Fresh+2 | Registered | 2018 |
| DESIRE 1736655 · TMA945703 | an individual | 1 Chemicals3 Cosmetics4 Oils+10 | Registered | 2016 |
| DEUGRO 1721261 · TMA958688 · design | an individual | 35 Advertising36 Finance39 Transport+1 | Registered | 2016 |
| DECORA 1656892 · TMA956304 | Arterra Wines Canada, Inc. | 33 Wine35 Advertising40 Treatment+1 | Registered | 2016 |