| CONDENSERCLEAN 1054862 · TMA565905 | ITW Food Equipment Group LLC | 7 Machines9 Electronics11 Lighting | Registered | 2002 |
| condensafe 1620318 · TMA883566 | an individual | 11 Lighting | Registered | 2014 |
| CONTINULUS 2028062 · TMA1138606 | Continulus | 38 Telecommunications41 Education42 Science | Registered | 2022 |
| CONTENDER 2023919 · TMA1202433 | an individual | 6 Metal7 Machines17 Rubber | Registered | 2023 |
| CANADENSIS 1953374 · TMA1162861 | CANADENSIS BOTANICAL GARDEN SOCIETY | 41 Education | Registered | 2023 |
| CONTENTLAB 1933750 · TMA1178408 | CodeProject Solutions Inc. | 9 Electronics16 Paper35 Advertising+2 | Registered | 2023 |
| CONTENDER 1894477 · TMA1107917 | Mosaic Sales Solutions US Operating Co. LLC | 35 Advertising | Registered | 2021 |
| CONTENDER 1879834 · TMA1087044 | APPLETON GRP LLC | 11 Lighting | Registered | 2020 |
| CENDENCE 1860231 · TMA1019851 | SZ DJI TECHNOLOGY Co. Ltd. | 9 Electronics | Registered | 2019 |
| CONTENDER 1684969 · TMA937295 | Interprovincial Cooperative Limited | 5 Pharmaceuticals | Registered | 2016 |
| CONTENTS 1473975 · TMA791050 | Conair LLC | 9 Electronics16 Paper18 Leather+1 | Registered | 2011 |
| CONDEMNED 1252995 · TMA709370 | Warner Bros. Entertainment Inc. | 9 Electronics | Registered | 2008 |
| CONTENDER 0624141 · TMA369749 | Holley Performance Products Inc. (a Delaware Corporation) | 7 Machines | Registered | 1990 |
| CONTENDER 2360970 | Shakespeare All Star Acquisition LLC | 28 Toys | Pending | 2024 |
| CONTENDER 2097519 · design | Batteries Plus, LLC | 9 Electronics | Pending | 2021 |
| CONTENDER 2097511 | Batteries Plus, LLC | 9 Electronics | Pending | 2021 |
| CANDINEORGANIC 2279615 · TMA1269068 · design | Owner not listed | 31 Fresh | Registered | 2024 |
| CANTINA 2261320 · TMA1281196 | Cantina, Inc. | 9 Electronics35 Advertising42 Science | Registered | 2025 |
| CINOTON 2254891 · TMA1274514 | Shenzhen Xinyuetong Technology Co. Ltd. | 11 Lighting | Registered | 2024 |
| CENTMEHR 2228690 · TMA1252810 · design | Anqing Qianxun Trading Co. Ltd. | 28 Toys | Registered | 2024 |
| Cyhentoon 2227360 · TMA1252656 | Guangxi Hezhou Laining Electronic Commerce Co. Ltd. | 11 Lighting | Registered | 2024 |
| CENDANT 2189344 · TMA1280737 | an individual | 9 Electronics44 Medical | Registered | 2025 |
| CO2NTAIN 2156145 · TMA1232247 · design | Mitsubishi Heavy Industries, Ltd. | 40 Treatment | Registered | 2024 |
| CIMIDONA 2148223 · TMA1226043 | an individual | 5 Pharmaceuticals | Registered | 2024 |
| CONTINO 2138011 · TMA1218187 · design | an individual | 33 Wine | Registered | 2024 |