| CODAR 1722488 · TMA954963 | Micro Focus LLC | 9 Electronics42 Science | Registered | 2016 |
| Cheddar 2305138 | 13374271 CANADA INC | 9 Electronics | Pending | 2024 |
| CHEDDAR 2199817 | 2383100 Ontario Inc. | 5 Pharmaceuticals29 Meat30 Coffee+1 | Pending | 2022 |
| CEDAR 1920306 · TMA1055305 | an individual | 34 Tobacco | Registered | 2019 |
| CODRAH 1471762 · TMA790055 · design | Codrah | 35 Advertising42 Science | Registered | 2011 |
| CEDAR 1276978 · TMA682020 | Canada Lands Company Limited | 35 Advertising41 Education43 Restaurants | Registered | 2007 |
| CEDAR 1106686 · TMA591868 · design | Groupe Phoenicia Inc. | 29 Meat30 Coffee32 Beer | Registered | 2003 |
| CEDAR 0742007 · TMA449036 | Groupe Phoenicia Inc. | 29 Meat30 Coffee31 Fresh+1 | Registered | 1995 |
| CODEWARE 1615096 · TMA885151 | Codeware, Inc. | 9 Electronics | Registered | 2014 |
| CADDERA 1848502 · TMA1080460 | Fresenius Medical Care Deutschland GmbH | 5 Pharmaceuticals | Registered | 2020 |
| CHOWDER 1311387 · TMA802655 | The Cartoon Network, Inc. (a Delaware corporation) | 9 Electronics | Registered | 2011 |
| CHOWDER 1311385 · TMA740628 | The Cartoon Network, Inc. (a Delaware corporation) | 41 Education | Registered | 2009 |
| COHEDUR 0316021 · TMA167246 | Lanxess Deutschland GmbH | 1 Chemicals | Registered | 1970 |
| Cohider 2320515 | Dongguan Huadi Trading Co , Ltd | 9 Electronics | Pending | 2024 |
| Cotrio 2258929 · TMA1277817 | Owner not shown | 25 Clothing | Registered | 2024 |
| CCDR 2242018 · TMA1197304 | Canadian Customer Debt Relief Inc. | 35 Advertising36 Finance41 Education | Registered | 2023 |
| COTERIE 2187679 · TMA1269198 · design | Coterie Brands Inc. | 3 Cosmetics5 Pharmaceuticals9 Electronics+5 | Registered | 2024 |
| CTR 2171694 · TMA1204348 · design | CTR Co.Ltd. | 12 Vehicles | Registered | 2023 |
| CUTTER 2171513 · TMA1186816 | UNITED INDUSTRIES CORPORATION | 5 Pharmaceuticals8 Hand10 Medical | Registered | 2023 |
| Cewiter 2160081 · TMA1210057 | an individual | 20 Furniture | Registered | 2023 |
| CUTTER 2143235 · TMA1284309 | UNITED INDUSTRIES CORPORATION | 4 Oils5 Pharmaceuticals7 Machines+2 | Registered | 2025 |
| CITREA 2108333 · TMA1227781 · design | Citizen Tokei Kabushiki Kaishaalso trading as Citizen Watch Co. Ltd. | 9 Electronics | Registered | 2024 |
| CIDER 2108239 · TMA1181725 · design | Beijing Xide International Network Technology Co.,Ltd. | 14 Jewellery18 Leather25 Clothing+1 | Registered | 2023 |
| CUATER 2100241 · TMA1161521 | TravisMathew, LLC | 24 Textiles25 Clothing | Registered | 2023 |
| CUTERO 2095954 · TMA1212960 | Xiamen Qiujia Trading Co.Ltd. | 25 Clothing | Registered | 2023 |