| CORNZORB 1491985 · TMA801811 | Xynyth Manufacturing Corp. | 1 Chemicals | Registered | 2011 |
| CORANCO 1317566 · TMA701636 | GROUPE SEB CANADA INC. | 35 Advertising | Registered | 2007 |
| CORNICHE 0389331 · TMA217212 | an individual | 12 Vehicles | Registered | 1976 |
| CORNUCOPIA 2012098 | SUBCONSCIOUS GAMES INC. | 9 Electronics28 Toys | Pending | 2020 |
| CORENCE 1849201 · TMA1027678 | BLANCO GmbH + Co KG | 11 Lighting | Registered | 2019 |
| CORENSO 1547930 · TMA863282 · design | Corenso North America, LLC | 16 Paper | Registered | 2013 |
| CORNAC 1541147 · TMA830716 | BRÛLÉ MÉDIA INC. | 9 Electronics16 Paper41 Education | Registered | 2012 |
| CORNICE 1518061 · TMA866918 | MARK ANTHONY GROUP INC. | 33 Wine | Registered | 2013 |
| CORNJ 1451939 · TMA772503 | THE OPERATING ROOM NURSES ASSOCIATION OF CANADA (ORNAC) ASSOCIATION DES INFIRMIERES ET INFIRMIERS DE SALLES D'OPERATION DU CANADA (AIISOC). | 16 Paper | Registered | 2010 |
| CORNMAX 1042229 · TMA573932 | Axter Agroscience Inc. | 1 Chemicals | Registered | 2003 |
| CORINOX 1036066 · TMA547976 · design | an individual | 6 Metal7 Machines8 Hand | Registered | 2001 |
| CORNEX 2368107 · design | WUHAN CHUNENG NEW ENERGY CO. LTD | 9 Electronics12 Vehicles | Pending | 2024 |
| CORNEX 2236777 · design | WUHAN CHUNENG NEW ENERGY CO. LTD | 9 Electronics12 Vehicles40 Treatment+1 | Pending | 2022 |
| Cornstock 2240622 · TMA1261516 | an individual | 35 Advertising41 Education | Registered | 2024 |
| CROWNCORE 2139459 | an individual | 19 Building | Pending | 2021 |
| CORNUCOPIAS 2357491 | Cornucopias Technology PTE LTD | 9 Electronics25 Clothing41 Education | Pending | 2024 |
| ChurnZero 2263826 · TMA1283339 | ChurnZero, Inc. | 9 Electronics42 Science | Registered | 2025 |
| CHROMAGLOW 2252437 · TMA1272831 | Big Star Lights Canada Inc. | 11 Lighting35 Advertising | Registered | 2024 |
| CHROMASILK 2240469 · TMA1240513 | Owner not listed | 3 Cosmetics | Registered | 2024 |
| CHROMAKEY 2238537 · TMA1258330 | an individual | 42 Science44 Medical | Registered | 2024 |
| CrankLoc 2234832 · TMA1256737 | Apex Oilfield Equipment (Qingdao) Co., Ltd. | 7 Machines | Registered | 2024 |
| crownslota 2221986 · TMA1248679 | Beijing Guanduo Network Technology Co., Ltd. | 9 Electronics | Registered | 2024 |
| cyrank 2220120 · TMA1247003 | an individual | 21 Housewares | Registered | 2024 |
| Crimson 2213832 · TMA1243204 | Per Vices Corporation | 9 Electronics | Registered | 2024 |
| CHROMOCYMATICS 2212387 · TMA1244214 · design | an individual | 44 Medical | Registered | 2024 |