| CODEXYME 1574405 · TMA877934 | Codexis, Inc. | 1 Chemicals | Registered | 2014 |
| CODESMART 1544599 · TMA836240 | MED2020 Health Care Software Inc. | 9 Electronics | Registered | 2012 |
| COTECNA 0535886 · TMA332820 | an individual | 35 Advertising | Registered | 1987 |
| codacon 2315766 | 12262169 CANADA INC. | 41 Education42 Science | Pending | 2024 |
| COTSEN 2314972 | an individual | 26 Sewing | Pending | 2024 |
| CUTSENSE 2258067 · TMA1260241 | Nanjing Chervon Industry Co. Ltd. | 7 Machines | Registered | 2024 |
| CUTISSCIENCE 2242188 · TMA1262959 | Owner not listed | 3 Cosmetics | Registered | 2024 |
| Citsimer 2220532 · TMA1247049 | an individual | 9 Electronics | Registered | 2024 |
| CITYSMART 2215723 · TMA1233981 | Targus International LLC | 9 Electronics18 Leather | Registered | 2024 |
| CODDSMZ 2202562 · TMA1239838 · design | Shenzhen Deng Dao Shan Technology Co.,Ltd | 28 Toys | Registered | 2024 |
| Cwatcun 2161287 · TMA1211163 | Caden (Guangzhou) Handbag Co. Ltd. | 9 Electronics | Registered | 2023 |
| CITIZEN 2158615 · TMA1266822 · design | Citizen Tokei Kabushiki Kaisha also trading as Citizen Watch Co. Ltd. | 7 Machines9 Electronics10 Medical+2 | Registered | 2024 |
| CODAGENIX 2123754 · TMA1203988 | Codagenix, Inc. | 5 Pharmaceuticals42 Science44 Medical | Registered | 2023 |
| catzino 2110237 · TMA1181739 | Lonely Captain Limited | 41 Education | Registered | 2023 |
| CHETOSENSAR 2108525 · TMA1158385 | an individual | 1 Chemicals | Registered | 2022 |
| CytoQuant 2060692 · TMA1250699 | DSM Austria GmbH | 1 Chemicals9 Electronics42 Science | Registered | 2024 |
| CATKIN 2023180 · TMA1210437 · design | GUANGZHOU COLORITE COSMETIC LTD. | 3 Cosmetics | Registered | 2023 |
| CODECOMBAT 2005261 · TMA1127240 | CodeCombat Inc. | 9 Electronics41 Education | Registered | 2022 |
| CuteKing 1980199 · TMA1123070 | an individual | 24 Textiles | Registered | 2022 |
| CUTECUMBERS 1944698 · TMA1145210 · design | Mucci International Marketing Inc. | 31 Fresh | Registered | 2022 |
| CITAGENIX 1941064 · TMA1214835 · design | CITAGENIX INC. | 35 Advertising40 Treatment41 Education+2 | Registered | 2023 |
| CITIZENCON 1937715 · TMA1125293 | Cloud Imperium Rights LLC | 41 Education | Registered | 2022 |
| CUITISAN 1934575 · TMA1174239 · design | CNTKOREA CO. LTD | 21 Housewares | Registered | 2023 |
| CIITIZEN 1926777 · TMA1136073 | Invitae Corporation | 9 Electronics42 Science | Registered | 2022 |
| CITIZENS 1914156 · TMA1094123 | KDR Pet Treats, LLC | 31 Fresh | Registered | 2021 |