| DOLCHEM 2208976 · TMA1265483 | D.I.S. Company Ltd. | 1 Chemicals | Registered | 2024 |
| DELCHEM 0325674 · TMA179385 | DELMAR CHEMICALS INC./ LES PRODUITS CHIMIQUES DELMAR INC. | 1 Chemicals5 Pharmaceuticals | Registered | 1971 |
| DALIGEN 2237876 | DALITA SA | 3 Cosmetics | Pending | 2023 |
| DALCON 2170891 | Dalcon Constructors Ltd. | 37 Construction | Pending | 2022 |
| DALCON 2170890 · design | Dalcon Constructors Ltd. | 37 Construction | Pending | 2022 |
| DALCINI 1727533 · TMA1007474 | Dalcini Inc. | 21 Housewares | Registered | 2018 |
| DULCENT 1630928 · TMA889055 | CORN PRODUCTS DEVELOPMENT, INC. a corporation organized and existing under the laws of the State of Delaware | 1 Chemicals | Registered | 2014 |
| DELCAN 1310494 · TMA822020 · design | Parsons Inc. | 35 Advertising36 Finance37 Construction+5 | Registered | 2012 |
| DOLLKEN 1267409 · TMA709076 · design | W. Döllken & Co. GmbH | 19 Building20 Furniture | Registered | 2008 |
| DÖLLKEN 1267406 · TMA708893 | W. Döllken & Co. GmbH | 19 Building20 Furniture | Registered | 2008 |
| DELCAN 0740635 · TMA503378 · design | Parsons Inc. | 9 Electronics35 Advertising37 Construction+1 | Registered | 1998 |
| DELCAN 0422314 · TMA237862 | Parsons Inc. | 9 Electronics35 Advertising37 Construction+1 | Registered | 1979 |
| DALACIN 0240864 · TMA108711 | PFIZER INC. | 5 Pharmaceuticals | Registered | 1957 |
| DALSEM 2261407 | Owner not listed | 6 Metal7 Machines11 Lighting+2 | Pending | 2023 |
| DALSAN 1985610 | Owner not shown | 6 Metal19 Building35 Advertising | Pending | 2019 |
| Diligen 1978022 | Diligen, Inc. | 9 Electronics | Pending | 2019 |
| 1/3 Delusion 2205084 · TMA1240128 | Fuzhou Mengciyuan Technology Co., Ltd. | 25 Clothing26 Sewing | Registered | 2024 |
| DUALSONIC 2156407 · TMA1254835 · design | JION MEDITECH Co. Ltd | 10 Medical | Registered | 2024 |
| DIALYSYNC 2136842 · TMA1180810 | an individual | 42 Science | Registered | 2023 |
| dalequin 2086572 · TMA1168767 | an individual | 9 Electronics28 Toys | Registered | 2023 |
| DELGENIUS 2042764 · TMA1145805 | an individual | 31 Fresh | Registered | 2022 |
| DUALSENSE 2039956 · TMA1188114 | Sony Interactive Entertainment Inc. | 9 Electronics28 Toys | Registered | 2023 |
| DELKAM 1965481 · TMA1152334 · design | NewLand Tech Inc. | 29 Meat | Registered | 2022 |
| DEALSIMPLE 1945686 · TMA1094578 · design | Real Deal Transaction Management Inc. | 9 Electronics42 Science | Registered | 2021 |
| DEALSIMPLE 1945685 · TMA1094577 | Real Deal Transaction Management Inc. | 9 Electronics42 Science | Registered | 2021 |