| DEFINITIVE!! 1489754 · TMA800145 | RYAN ULC | 35 Advertising36 Finance | Registered | 2011 |
| DEFINITIVE 1255265 · TMA665350 | DEFINITIVE TECHNOLOGY, LLC. | 9 Electronics | Registered | 2006 |
| DEFINITIVE 2130654 | Inveniem, LLC | 35 Advertising40 Treatment42 Science | Pending | 2020 |
| DEFINITION 0888225 · TMA521340 | GESTION WEF INC. | 3 Cosmetics5 Pharmaceuticals | Registered | 2000 |
| Definition 2291929 | Flare Audio Technologies Limited | 9 Electronics10 Medical18 Leather+5 | Pending | 2023 |
| DEFINITY. 2155835 · TMA1239578 · design | Definity Insurance Company | 36 Finance | Registered | 2024 |
| DEFINITY 2069529 · TMA1134236 | Definity Insurance Company | 36 Finance | Registered | 2022 |
| DEFINITY 2016169 · TMA1157047 | Hologic, Inc. | 10 Medical | Registered | 2022 |
| DEFINITY 1467858 · TMA840060 | Lighting Science Group Corporation, a corporation of the State of Delaware | 11 Lighting | Registered | 2013 |
| DEFINITY 1183647 · TMA680326 | an individual | 9 Electronics | Registered | 2007 |
| DEFINITY 0885825 · TMA604670 | Lantheus Medical Imaging, Inc. (a Delaware corporation) | 5 Pharmaceuticals | Registered | 2004 |
| DEFINITIONS 1709206 · TMA985925 | TELUS Health Care Centres Inc. Cliniques TELUS Santé Inc. | 9 Electronics16 Paper18 Leather+6 | Registered | 2017 |
| DEFINITION 6 1461163 · TMA822913 · design | Michon, Inc. | 35 Advertising42 Science | Registered | 2012 |
| DIVINITI 1373677 · TMA786085 | M/s. Taneja Mines Private Limited | 2 Paints14 Jewellery | Registered | 2010 |
| DEFIANT 1932256 · TMA1192338 | 10859036 Canada Inc. | 3 Cosmetics9 Electronics16 Paper+6 | Registered | 2023 |
| DEFIANT 1915589 · TMA1093100 | Home Depot International, Inc. | 6 Metal | Registered | 2021 |
| Defined 1910063 · TMA1141623 | an individual | 11 Lighting | Registered | 2022 |
| Défentiel 1879100 · TMA1073032 | Owner not shown | 5 Pharmaceuticals44 Medical | Registered | 2020 |
| DEFIANT 1804334 · TMA988886 | Home Depot International, Inc. | 9 Electronics11 Lighting | Registered | 2018 |
| DEFIANT 1804333 · TMA1051711 | Home Depot International, Inc. | 6 Metal9 Electronics | Registered | 2019 |
| DEFENDAIR 1795869 · TMA980298 | The Dow Chemical Company | 17 Rubber | Registered | 2017 |
| DIVINITY 1710376 · TMA943995 | Flying Monkeys Craft Brewery Limited | 9 Electronics14 Jewellery16 Paper+6 | Registered | 2016 |
| DEBANTIC 1663296 · TMA900588 | Elanco US Inc. | 5 Pharmaceuticals | Registered | 2015 |
| DEFIANT 1600140 · TMA864258 | Home Depot International, Inc. | 9 Electronics11 Lighting | Registered | 2013 |
| DEFIANT 1493869 · TMA896941 | Home Depot International, Inc. | 9 Electronics | Registered | 2015 |