| CORNCOB 1879524 · TMA1082538 | PRO-Equipment, Inc. | 11 Lighting | Registered | 2020 |
| CORNSHARE 1630469 · TMA900580 | PIONEER HI-BRED INTERNATIONAL, INC. | 41 Education | Registered | 2015 |
| 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 |
| CORNZORB 1491985 · TMA801811 | Xynyth Manufacturing Corp. | 1 Chemicals | Registered | 2011 |
| CRANSTON 1416863 · TMA759684 · design | Brookfield Residential (Alberta) LP. | 36 Finance37 Construction | Registered | 2010 |
| CRANSTON 1416862 · TMA759685 | Brookfield Residential (Alberta) LP. | 36 Finance37 Construction | Registered | 2010 |
| 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 |
| CHRONICLE 2207517 · TMA1246446 · design | an individual | 42 Science | Registered | 2024 |
| CRUNCHY 2203073 · TMA1239917 | REFINED PROFILE INC., a legal entity | 10 Medical | Registered | 2024 |
| CRIMECAST 2199526 · TMA1220792 | Cap Index, Inc. | 35 Advertising42 Science | Registered | 2024 |
| CRANEKIT 2193894 · TMA1264065 · design | Chongqing Dazu Yongli Cutting Tool Co., Ltd | 8 Hand | Registered | 2024 |
| CRENESSITY 2179399 · TMA1284434 | Neurocrine Biosciences, Inc. | 5 Pharmaceuticals | Registered | 2025 |
| CRUNCHCUP 2177984 · TMA1227277 | Crunch Tech, Inc. | 21 Housewares | Registered | 2024 |
| CHERNIGIVSKE 2175054 · TMA1226155 · design | Private Joint Stock Company AB INBEV EFES UKRAINE | 32 Beer | Registered | 2024 |
| CHERNIGIVSKE 2173611 · TMA1223833 | Private Joint Stock Company AB INBEV EFES UKRAINE | 32 Beer | Registered | 2024 |