| DISPLAYLINK 2026536 · TMA1283841 · design | Synaptics Incorporated | 9 Electronics42 Science | Registered | 2025 |
| DISPLAYTOYS 1622850 · TMA888255 | an individual | 35 Advertising | Registered | 2014 |
| DISPLAYLINK 1340634 · TMA752017 | Synaptics Incorporated | 9 Electronics42 Science | Registered | 2009 |
| DISPLAYMATE 1063061 · TMA564303 | DISPLAYMATE TECHNOLOGIES CORPORATION | 9 Electronics | Registered | 2002 |
| DISPLAYSHADE 1169210 · TMA653747 | Caravan Canopy Int'l Inc. | 22 Ropes | Registered | 2005 |
| DISPLAYCAST 1825875 · TMA1053078 | Ag Leader Technology, Inc. | 9 Electronics | Registered | 2019 |
| DISPLAYS2GO 1597260 · TMA912914 | D2G Group LLC | 6 Metal18 Leather19 Building+3 | Registered | 2015 |
| DISPELAIR 1012077 · TMA538040 | BLACKBURN CHEMICALS LIMITED | 1 Chemicals | Registered | 2000 |
| DISPLÉTECH 0613391 · TMA356262 | DISPLETECH CORP. | 16 Paper20 Furniture35 Advertising | Registered | 1989 |
| DIGIPLAYSPACE 1614227 · TMA875097 | TORONTO INTERNATIONAL FILM FESTIVAL INC. | 41 Education | Registered | 2014 |
| Dasbayla 2233661 · TMA1259692 | Xiamen Langchi Technology Co. Ltd. | 25 Clothing | Registered | 2024 |
| Dacefloy 2175000 · TMA1226142 | an individual | 28 Toys | Registered | 2024 |
| digivelop 2132647 · TMA1194827 | Digivelop Media Ltd. | 9 Electronics42 Science | Registered | 2023 |
| DAKAFUL 2121729 · TMA1197708 | Jiangmen City Allred Lighting Technology Co. Ltd. | 11 Lighting | Registered | 2023 |
| DCBEL 2102836 · TMA1164935 | dcbel Inc. | 9 Electronics35 Advertising37 Construction | Registered | 2023 |
| DISCIPLINE 2102083 · TMA1280483 | 9289-0011 Québec Inc. | 21 Housewares32 Beer | Registered | 2025 |
| dessiball 2036287 · TMA1158111 | an individual | 7 Machines11 Lighting | Registered | 2022 |
| DECIBEL 2024451 · TMA1153983 | Decibel Partners, LLC | 35 Advertising36 Finance | Registered | 2022 |
| DAISYFIELD 2018897 · TMA1156130 | KOHLER CO. | 11 Lighting | Registered | 2022 |
| dasbulk 1952197 · TMA1133537 | an individual | 9 Electronics | Registered | 2022 |
| DCBEL 1944427 · TMA1161889 | dcbel Inc. | 9 Electronics35 Advertising | Registered | 2023 |
| Doggieville 1876497 · TMA1084646 | Le Centre Canine Doggieville Inc. | 16 Paper21 Housewares24 Textiles+1 | Registered | 2020 |
| DECKPLUS 1869024 · TMA1041707 | Behr Process LLC | 1 Chemicals2 Paints | Registered | 2019 |
| DECIBEL 1851017 · TMA1082227 | Decibel Therapeutics, Inc. | 5 Pharmaceuticals | Registered | 2020 |
| DogPlay 1819918 · TMA1006400 | DND DogPlay Inc. | 43 Restaurants44 Medical45 Legal | Registered | 2018 |