| CORTERRA 2259037 · TMA1264577 | Heartland Recreational Vehicles, LLC | 12 Vehicles | Registered | 2024 |
| Ceratreat 2187971 · TMA1268417 | Atotech Deutschland GmbH & Co. KG | 1 Chemicals7 Machines | Registered | 2024 |
| CORETHERM 2021821 · TMA1157983 | an individual | 10 Medical | Registered | 2022 |
| CORTREE 1944069 · TMA1172989 · design | an individual | 9 Electronics16 Paper35 Advertising+5 | Registered | 2023 |
| COROTURN 1788004 · TMA1045443 | an individual | 7 Machines9 Electronics | Registered | 2019 |
| CORROTHERM 1667819 · TMA919259 | Corrotherm International Limited | 6 Metal35 Advertising42 Science | Registered | 2015 |
| CORTRAK 1170021 · TMA661640 | Avent, Inc. | 9 Electronics10 Medical16 Paper | Registered | 2006 |
| CRYOTHERMAL 2182270 | Therabody, Inc. | 10 Medical | Pending | 2022 |
| CREATOR 2252195 · TMA1272810 · design | Owner not shown | 28 Toys | Registered | 2024 |
| CRATER 2248187 · TMA1267284 | an individual | 25 Clothing | Registered | 2024 |
| CREATOR 2228558 · TMA1252783 | BYD Coach & Bus LLC | 12 Vehicles | Registered | 2024 |
| CREATOR 2182820 · TMA1230360 | Zhejiang Flashforge 3D Technology Co. Ltd | 7 Machines | Registered | 2024 |
| CeraTrust 2173285 · TMA1204380 | Endress+Hauser Conducta GmbH+Co. KG | 9 Electronics | Registered | 2023 |
| CERTORA 2166961 · TMA1186813 | Certora Ltd. | 9 Electronics42 Science | Registered | 2023 |
| Criterion 2159921 · TMA1266832 | T + A elektroakustik GmbH & Co. KG | 9 Electronics | Registered | 2024 |
| CERADIR 2131177 · TMA1239473 | KMEW CO. LTD | 6 Metal19 Building | Registered | 2024 |
| Cardior 2130986 · TMA1175165 | Cardior Pharmaceuticals GmbH | 42 Science | Registered | 2023 |
| CERTARA 2126825 · TMA1282476 · design | an individual | 9 Electronics35 Advertising41 Education+1 | Registered | 2025 |
| CRIATERRA 2059041 · TMA1154192 | CRIATERRA INNOVATIONS LTD | 19 Building42 Science | Registered | 2022 |
| CARTWHIRLER 2003153 · TMA1257473 | Owner not shown | 25 Clothing27 Carpets28 Toys+2 | Registered | 2024 |
| CharterUP 1987056 · TMA1099121 | CharterUP LLC | 35 Advertising | Registered | 2021 |
| Curator 1980556 · TMA1139302 | Ettaler Klosterbetriebe GmbH | 32 Beer | Registered | 2022 |
| CERTIRACK 1972792 · TMA1222709 | Owner not shown | 37 Construction42 Science | Registered | 2024 |
| CREATOR 1940088 · TMA1152480 | WeWork Companies LLC | 36 Finance41 Education | Registered | 2022 |
| CREADER 1937346 · TMA1146184 · design | LAUNCH TECH CO. LTD | 9 Electronics | Registered | 2022 |