| DORUS 0524653 · TMA309304 | Henkel AG & Co. KGaA | 1 Chemicals2 Paints6 Metal+2 | Registered | 1985 |
| DORSA 2233111 · design | an individual | 3 Cosmetics6 Metal9 Electronics+14 | Pending | 2022 |
| Doreso 2166666 · TMA1219880 | an individual | 9 Electronics | Registered | 2024 |
| DORIS 1704859 · TMA940853 | 2128933 Alberta Ltd. | 30 Coffee | Registered | 2016 |
| DORSAY 1234957 · TMA666500 | Dorsay Development Corporation | 36 Finance37 Construction | Registered | 2006 |
| DORIS 0298741 · TMA151395 | Doris Inc. | 17 Rubber | Registered | 1967 |
| DORSAY 2003683 | Steven Childs Creative, LLC | 35 Advertising | Pending | 2019 |
| Dourose 2249884 · TMA1268782 | an individual | 21 Housewares | Registered | 2024 |
| DORESCO 1349793 · TMA727840 | Lubrizol Advanced Materials, Inc. | 1 Chemicals | Registered | 2008 |
| DOORES 2314959 · TMA1245709 · design | Owner not listed | 26 Sewing | Registered | 2024 |
| DRX 2261739 · TMA1281273 · design | DRX BIOTECH INTERNATIONAL COMPANY LIMITED | 3 Cosmetics | Registered | 2025 |
| DURX 2247836 · TMA1267216 | Les Ventes Bergeron Sales Inc. | 11 Lighting35 Advertising | Registered | 2024 |
| DORICCIA 2236178 · TMA1256862 | an individual | 3 Cosmetics | Registered | 2024 |
| DRYKI 2211680 · TMA1244183 | TERRALARK LLC | 24 Textiles | Registered | 2024 |
| DerryK 2207844 · TMA1265476 | Aliciainc Corporation | 3 Cosmetics21 Housewares25 Clothing+1 | Registered | 2024 |
| DORAJI 2198346 · TMA1238370 | 1000008519 ONTARIO INC. | 43 Restaurants | Registered | 2024 |
| DROSE 2188970 · TMA1232792 | an individual | 9 Electronics26 Sewing | Registered | 2024 |
| DUREX 2170098 · TMA1274085 · design | LRC Products Limited | 3 Cosmetics5 Pharmaceuticals10 Medical | Registered | 2024 |
| Dr6ix 2159063 · TMA1209992 | Dr. Martin Jugenburg Medical Professional Corporation | 44 Medical | Registered | 2023 |
| Drcowu 2156890 · TMA1208810 | Shenzhen Gelu Electronic Commerce Co. Ltd. | 8 Hand9 Electronics | Registered | 2023 |
| DIRIGO 2156608 · TMA1250877 | an individual | 14 Jewellery18 Leather25 Clothing | Registered | 2024 |
| DRAX 2154229 · TMA1275722 · design | Drax Corporate Limited | 1 Chemicals4 Oils6 Metal+13 | Registered | 2024 |
| DRACCU 2153616 · TMA1208665 · design | ASSURE TECH. (HANGZHOU) CO. LTD | 5 Pharmaceuticals10 Medical | Registered | 2023 |
| DEROS 2136852 · TMA1205085 | Mirka Ltd | 7 Machines | Registered | 2023 |
| DARCHE 2126905 · TMA1280530 | Charles Parsons (Holdings) Pty Limited | 18 Leather20 Furniture22 Ropes+1 | Registered | 2025 |