| CORRECTx 2146578 · TMA1253623 | Locanabio, Inc. | 42 Science | Registered | 2024 |
| COROCUT 1787981 · TMA1045445 | an individual | 7 Machines9 Electronics | Registered | 2019 |
| CORUSCATE 2340736 | Shenzhen Lifa Sibang Trading Co. Ltd | 3 Cosmetics | Pending | 2024 |
| Correctseq 2150690 · TMA1217332 · design | CorrectSequence Therapeutics Co. Ltd | 5 Pharmaceuticals42 Science | Registered | 2024 |
| CHARCODOTE 0544301 · TMA314353 | FINCHLEY RESEARCH & DEVELOPMENT INC. | 12 Vehicles | Registered | 1986 |
| CIRCOOTER 2184708 · TMA1231402 | Dongguan Aibokesi Technology Co. LTD | 12 Vehicles | Registered | 2024 |
| CORESTONE 1932461 · TMA1161864 | Serrala Group GmbH | 9 Electronics35 Advertising38 Telecommunications+1 | Registered | 2023 |
| CARECODE 1807269 · TMA1054893 | Manitowoc Foodservice Companies, LLC | 9 Electronics | Registered | 2019 |
| Corestone 1771360 · TMA964457 | an individual | 45 Legal | Registered | 2017 |
| CORACTO 1606737 · TMA892495 | an individual | 10 Medical | Registered | 2014 |
| CRYOCOAT 1486316 · TMA868632 | an individual | 10 Medical | Registered | 2014 |
| CERECYTE 1181053 · TMA668495 | DePuy Synthes, Inc. | 10 Medical | Registered | 2006 |
| CRYOCATH 0862163 · TMA561484 | Medtronic CryoCath LP | 10 Medical | Registered | 2002 |
| CORROSTOP 0364628 · TMA201226 | PPG Architectural Coatings Canada, Inc./PPG Revêtements architecturaux Canada, inc. | 2 Paints | Registered | 1974 |
| CORRECTOL 0240020 · TMA109035 | an individual | 5 Pharmaceuticals | Registered | 1958 |
| Crocodex 2365764 | 9466-1014 Québec inc. | – | Pending | 2024 |
| coreact 2355873 | LG H&H Co., LTD. | 21 Housewares | Pending | 2024 |
| coreact 2355872 | LG H&H Co., LTD. | 10 Medical | Pending | 2024 |
| CURIOCITY 2257702 | Owner not listed | 35 Advertising41 Education | Pending | 2023 |
| CorrCAD 2125745 | SafEngServices & technologies ltd. / SafEngServices & technologies ltée (SES) | 9 Electronics | Pending | 2021 |
| Coursette 2071402 | an individual | 9 Electronics35 Advertising42 Science | Pending | 2020 |
| COEURIOSITÉ 2128985 · TMA1273971 | 4197097 Canada Inc. | 35 Advertising | Registered | 2024 |
| CORRECTMOBILE 1200529 · TMA745394 | CORRECT GOLF INC. | 5 Pharmaceuticals7 Machines8 Hand+20 | Registered | 2009 |
| CROAKWOOD 2264667 · TMA1283416 · design | Glad Raptor Games Inc. | 9 Electronics | Registered | 2025 |
| CRYSTALTECH 2263636 · TMA1283300 | Atlantic Coast Import Distributors Inc. | 11 Lighting | Registered | 2025 |