| DEXIM 1423130 · TMA799208 · design | TELEWAY INDUSTRIAL LTD. | 9 Electronics15 Musical | Registered | 2011 |
| DECIMA 0785721 · TMA476012 | Harris/Decima Inc. | 35 Advertising | Registered | 1997 |
| DEXIM 0648011 · TMA379386 | LES AGENCES PIERRE DOYON INC. | 25 Clothing | Registered | 1991 |
| DIGIMO 2267193 | DIGIMO INTERNET MARKETING AGENCY INC. | 35 Advertising | Pending | 2023 |
| DESINO 2232305 · TMA1223937 | Shenzhen Yueshen Technology Co. Ltd. | 20 Furniture | Registered | 2024 |
| DEZIN 2223400 · TMA1248835 · design | Guangdong Dingxian Technology Co., Ltd. | 11 Lighting | Registered | 2024 |
| DGM 2071585 · TMA1135871 | Denovo Biopharma LLC | 5 Pharmaceuticals44 Medical | Registered | 2022 |
| DEGSON 2061997 · TMA1202553 · design | NINGBO DEGSON ELECTRONICS CO. LTD. | 35 Advertising | Registered | 2023 |
| DCIM 2056487 · TMA1128572 | KraussMaffei Technologies GmbH | 7 Machines | Registered | 2022 |
| DEXION 1919697 · TMA1152251 | an individual | 6 Metal9 Electronics20 Furniture | Registered | 2022 |
| DEGSON 1914371 · TMA1116717 · design | NINGBO DEGSON ELECTRONICS CO. LTD. | 9 Electronics | Registered | 2021 |
| DECIEM 1843035 · TMA1004169 | Deciem Beauty Group Inc. | 35 Advertising44 Medical | Registered | 2018 |
| DGM 1737355 · TMA967825 · design | an individual | 8 Hand9 Electronics14 Jewellery+1 | Registered | 2017 |
| DECIEM 1705405 · TMA965512 | Deciem Beauty Group Inc. | 3 Cosmetics | Registered | 2017 |
| DOXIM 1692025 · TMA966771 | DOXIM SOLUTIONS INC. | 9 Electronics35 Advertising36 Finance+3 | Registered | 2017 |
| DEZMO 1647856 · TMA910906 | Meubles BDM + Inc. | 9 Electronics20 Furniture | Registered | 2015 |
| DECIEM 1597453 · TMA884741 | Deciem Beauty Group Inc. | 35 Advertising36 Finance | Registered | 2014 |
| DOGMA 1594675 · TMA934987 · design | an individual | 14 Jewellery16 Paper18 Leather+4 | Registered | 2016 |
| DIGIUM 1575958 · TMA887040 | DIGIUM INC. | 9 Electronics38 Telecommunications41 Education+1 | Registered | 2014 |
| DEZINE 1472645 · TMA835936 | ANOMET INC. | 6 Metal | Registered | 2012 |
| DESMO 1463705 · TMA804087 | Woodway USA, Inc. | 28 Toys | Registered | 2011 |
| DEGSON 1325778 · TMA717883 | NINGBO DEGSON ELECTRONICS CO. LTD. | 7 Machines9 Electronics | Registered | 2008 |
| DIGIUM 1250982 · TMA680421 | DIGIUM INC. | 9 Electronics42 Science | Registered | 2007 |
| DIGION 1110201 · TMA633262 | DigiOn Inc. | 9 Electronics42 Science | Registered | 2005 |
| DECOMA 0590458 · TMA374721 | Magna International Inc. | 7 Machines9 Electronics40 Treatment+1 | Registered | 1990 |