| DYSCO 1297528 · TMA739328 · design | Dysco Car & Truck Rental Ltd. | 37 Construction39 Transport | Registered | 2009 |
| DHASCO 0764296 · TMA475083 | an individual | 1 Chemicals5 Pharmaceuticals29 Meat | Registered | 1997 |
| DECO 2271624 · TMA1266078 | Owner not listed | 11 Lighting | Registered | 2024 |
| DAECO 2174722 · TMA1206636 | DAEWON APPLIED ENG. CO. | 7 Machines | Registered | 2023 |
| DEKCO 2159247 · TMA1219205 · design | GLAZERO INTERNATIONAL INC | 9 Electronics | Registered | 2024 |
| DASCO 2033260 · TMA1158090 | Dunkelman & Son Limited. | 3 Cosmetics21 Housewares25 Clothing+2 | Registered | 2022 |
| DAC 2003212 · TMA1153909 · design | an individual | 6 Metal13 Firearms20 Furniture+2 | Registered | 2022 |
| DAKO 1983625 · TMA1135458 · design | Owner not shown | 6 Metal19 Building35 Advertising | Registered | 2022 |
| DAKO 1982753 · TMA1135455 | Owner not shown | 6 Metal19 Building35 Advertising | Registered | 2022 |
| DAC 1982746 · TMA1096837 · design | DONGAH ALUMINUM CORPORATION | 6 Metal18 Leather | Registered | 2021 |
| DAYCO 1954955 · TMA1270473 | DAYCO IP HOLDINGS, LLC | 7 Machines8 Hand9 Electronics+7 | Registered | 2024 |
| DAYCO 1954702 · TMA1270474 · design | DAYCO IP HOLDINGS, LLC | 7 Machines8 Hand9 Electronics+7 | Registered | 2024 |
| DOWCO 1931540 · TMA1161694 | Dowco, Inc. | 6 Metal12 Vehicles22 Ropes | Registered | 2023 |
| DUCO 1899848 · TMA1141656 | SHANGHAI DUCO NETWORK TECHNOLOGY CO. LTD | 9 Electronics | Registered | 2022 |
| DAC 1896450 · TMA1095544 · design | DAC Group (Holdings) Limited/ Groupe DAC (Gestions) Limitee | 9 Electronics35 Advertising42 Science | Registered | 2021 |
| DEAKO 1893934 · TMA1111694 | Deako, Inc. | 9 Electronics11 Lighting20 Furniture | Registered | 2021 |
| DIAC 1857655 · TMA1019722 · design | Essex Lake Group LLC | 36 Finance41 Education42 Science | Registered | 2019 |
| DYAX 1836888 · TMA1075624 | Owner not shown | 1 Chemicals5 Pharmaceuticals | Registered | 2020 |
| DECO 1818357 · TMA1038924 · design | G-Mode Corporation | 9 Electronics25 Clothing28 Toys+1 | Registered | 2019 |
| DAC 1712008 · TMA968650 | Canadian National Association of Real Estate Appraisers | 36 Finance | Registered | 2017 |
| DAWCO 1695217 · TMA928902 | ENTREPRISES DE CONSTRUCTION DAWCO INC. / DAWCO CONSTRUCTION ENTERPRISES INC. | 37 Construction40 Treatment42 Science | Registered | 2016 |
| DSCO 1651982 · TMA1011156 | CEO (Etudes en Ostéopathie) Inc. | 9 Electronics16 Paper35 Advertising+2 | Registered | 2018 |
| DECO 1620743 · TMA882055 | Platinum Naturals Ltd. | 5 Pharmaceuticals | Registered | 2014 |
| DECCO 1583584 · TMA910241 | Owner not shown | 1 Chemicals5 Pharmaceuticals | Registered | 2015 |
| DTAC² 1557070 · TMA849302 | Elbit Systems Land and C4l Ltd. | 9 Electronics | Registered | 2013 |