| DASCO 2033260 · TMA1158090 | Dunkelman & Son Limited. | 3 Cosmetics21 Housewares25 Clothing+2 | Registered | 2022 |
| DASCO 0510236 · TMA300336 | Dasco Storage Solutions Ltd. | 7 Machines9 Electronics11 Lighting+2 | Registered | 1985 |
| DASCO 0308172 · TMA162047 | D.A. Stuart Inc. | 1 Chemicals2 Paints3 Cosmetics+4 | Registered | 1969 |
| DASCO 0128426 · TMDA39734 | DASCO PRO, INC. AN ILLINOIS CORPORATION | 8 Hand | Registered | 1926 |
| DAECO 2174722 · TMA1206636 | DAEWON APPLIED ENG. CO. | 7 Machines | Registered | 2023 |
| 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 |
| 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 |
| DYSCO 1297528 · TMA739328 · design | Dysco Car & Truck Rental Ltd. | 37 Construction39 Transport | Registered | 2009 |
| DISCO 1229202 · TMA664684 · design | DISCO CORPORATION | 7 Machines | Registered | 2006 |
| DUSCO 0850135 · TMA497728 | DUSCO DOORS LTD./LES PORTES DUSCO LTEE | 6 Metal19 Building | Registered | 1998 |
| DAYCO 0644025 · TMA378173 | DAYCO IP HOLDINGS, LLC | 9 Electronics11 Lighting | Registered | 1991 |
| DISCO 0633028 · TMA371037 · design | DISCO CORPORATION | 7 Machines | Registered | 1990 |
| DAYCO 0365580 · TMA200421 | DAYCO IP HOLDINGS, LLC | 12 Vehicles | Registered | 1974 |
| DAYCO 0264374 · TMA125199 | DAYCO IP HOLDINGS, LLC | 12 Vehicles | Registered | 1962 |
| DASHCO 2327036 | Groupe de ventes Janaca inc. | 6 Metal | Pending | 2024 |
| DYACO 2201576 | Dyaco International Inc. | 10 Medical | Pending | 2022 |
| DISCO 2130097 | Mastermind Inc. | 38 Telecommunications41 Education42 Science | Pending | 2021 |
| DECO 2271624 · TMA1266078 | Owner not listed | 11 Lighting | Registered | 2024 |
| DASKU 2212595 · TMA1245264 | Shenzhen Yirui Global Technology Co., Ltd. | 9 Electronics | Registered | 2024 |
| DAISHO 2173342 · TMA1241141 | JohnsTech International Corporation | 9 Electronics | Registered | 2024 |
| DEKCO 2159247 · TMA1219205 · design | GLAZERO INTERNATIONAL INC | 9 Electronics | Registered | 2024 |
| DASH 2141459 · TMA1233344 | Insulet Corporation | 9 Electronics10 Medical | Registered | 2024 |
| Dasja 2124277 · TMA1197743 | SHENZHEN LIUSING TRADING CO.. LTD. | 20 Furniture21 Housewares | Registered | 2023 |