| DECCOREX 1822191 · TMA1079013 · design | an individual | 6 Metal10 Medical14 Jewellery+6 | Registered | 2020 |
| DECOROCK 1647668 · TMA892418 | DECOROCK INC. | 2 Paints35 Advertising37 Construction | Registered | 2014 |
| DecorCoat 1514523 · TMA835546 | Vitrum Holdings Ltd. | 6 Metal19 Building20 Furniture | Registered | 2012 |
| DECORGEL 1388770 · TMA751581 | Owner not shown | 30 Coffee | Registered | 2009 |
| DECKWORKS 1259773 · TMA669849 | PPG Architectural Finishes, Inc. | 3 Cosmetics | Registered | 2006 |
| DECORACK 0808517 · TMA482120 | TOPS Products LLC | 16 Paper | Registered | 1997 |
| DECKRKAT 2270973 | Owner not listed | 7 Machines | Pending | 2023 |
| DOCKERS 2208680 · TMA1241617 | Levi Strauss & Co. | 3 Cosmetics | Registered | 2024 |
| DocuWorks 2189122 · TMA1278897 | FUJIFILM Business Innovation Kabushiki Kaisha (FUJIFILM Business Innovation Corp.) | 9 Electronics42 Science | Registered | 2024 |
| DECREASE 2151062 · TMA1256183 · design | Brolli Group Limited | 3 Cosmetics | Registered | 2024 |
| DOCSEARCH 2140169 · TMA1183188 | Doctor Evidence, LLC | 42 Science | Registered | 2023 |
| 6° 6 DEGREES 2044684 · TMA1204707 · design | 11753649 Canada Inc. dba "6 Degrees Holdings" | 36 Finance | Registered | 2023 |
| DASROQ 2042859 · TMA1146861 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 2022 |
| DESROQ 2042858 · TMA1146860 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 2022 |
| DUSROQ 2042857 · TMA1146859 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 2022 |
| 37 DEGREES 2029952 · TMA1143622 · design | 37 Degrees Fashion Trading Ltd | 9 Electronics14 Jewellery18 Leather+1 | Registered | 2022 |
| 37 Degrees 2014649 · TMA1135615 | 37 Degrees Fashion Trading Ltd | 9 Electronics14 Jewellery18 Leather+1 | Registered | 2022 |
| DOGROOK 2011140 · TMA1156000 | DAVAON LIMITED | 9 Electronics | Registered | 2022 |
| decorstar 1976096 · TMA1134577 | Shenzhen Sangshen E-commerce Co. Ltd. | 11 Lighting | Registered | 2022 |
| 4DEGREES 1950181 · TMA1125219 | VANTAGE DATA CENTERS CANADA, LIMITED PARTNERSHIP | 35 Advertising36 Finance42 Science | Registered | 2022 |
| DESERRES 1928706 · TMA1123365 · design | Omer DeSerres Inc. | 1 Chemicals2 Paints8 Hand+16 | Registered | 2022 |
| 32° DEGREES 1923883 · TMA1100981 · design | D.P.I. Imports, Inc. | 25 Clothing | Registered | 2021 |
| DEKKORSCAPE 1900713 · TMA1089688 | ALLIANCE DESIGNER PRODUCTS INC./PRODUITS DESIGNER ALLIANCE INC. | 19 Building | Registered | 2020 |
| 360° DEGREES 1898406 · TMA1113821 | Sea to Summit Pty Ltd | 6 Metal11 Lighting18 Leather+5 | Registered | 2021 |
| DACERZ 1889167 · TMA1085915 | PFIZER INC. | 5 Pharmaceuticals | Registered | 2020 |