| COSACO 2150955 · TMA1256181 | Cosaco GmbH | 1 Chemicals5 Pharmaceuticals | Registered | 2024 |
| COCOCO 1530199 · TMA846728 · design | Cocoa Community Confections Inc. | 30 Coffee32 Beer35 Advertising+1 | Registered | 2013 |
| COCOCO 1530197 · TMA847323 | Cocoa Community Confections Inc. | 30 Coffee32 Beer35 Advertising+1 | Registered | 2013 |
| COSASCO 2032853 | Rohrback Cosasco Systems, Inc. | 7 Machines9 Electronics11 Lighting | Pending | 2020 |
| COGECO 1763694 · TMA1040315 | COGECO INC. | 35 Advertising38 Telecommunications41 Education+2 | Registered | 2019 |
| COSECO 1355063 · TMA748192 | CO-OPERATORS GENERAL INSURANCE COMPANY | 36 Finance | Registered | 2009 |
| COGECO 2360927 | COGECO INC. | 35 Advertising36 Finance37 Construction+2 | Pending | 2024 |
| COCOCKA 2156751 · TMA1209819 · design | Owner not shown | 9 Electronics | Registered | 2023 |
| CHICAGO 0423801 · TMA262374 | CHICAGO MUSIC, INC. | 9 Electronics16 Paper41 Education | Registered | 1981 |
| CHICAGO 0387119 · TMA228011 · design | CHICAGO MUSIC, INC. | 9 Electronics16 Paper41 Education | Registered | 1978 |
| COUKASO 2338457 | Owner not listed | 9 Electronics | Pending | 2024 |
| CACCICO 2312322 | Chongqing Fengdu Technology Co. Ltd. | 25 Clothing | Pending | 2024 |
| COOKOOKY 2241622 · TMA1261586 | an individual | 18 Leather | Registered | 2024 |
| Cookhouse 2236049 · TMA1256829 | Big Country Raw Ltd. | 31 Fresh | Registered | 2024 |
| CHICWISH 2221681 · TMA1261343 | Owner not shown | 14 Jewellery25 Clothing | Registered | 2024 |
| CHICJOC 2206587 · TMA1241423 · design | Shanghai jiuci Brand Management Co., Ltd. | 18 Leather25 Clothing35 Advertising | Registered | 2024 |
| caaguis 2182355 · TMA1229057 | an individual | 28 Toys | Registered | 2024 |
| CUJAG 2160435 · TMA1212179 | Xiamen Chunhongling Technology Co. Ltd. | 11 Lighting | Registered | 2023 |
| CHIKCHOK 2135895 · TMA1185430 · design | an individual | 25 Clothing40 Treatment | Registered | 2023 |
| CASEASY 2120126 · TMA1242359 · design | Aubyn Innovations Inc | 42 Science | Registered | 2024 |
| Cakoss 2110091 · TMA1177868 | an individual | 28 Toys | Registered | 2023 |
| CASEKOO 2107905 · TMA1191793 | Shenzhen Ruixin Digital Technology Co.Ltd. | 9 Electronics | Registered | 2023 |
| CHICAS 2103919 · TMA1200054 | Owner not shown | 32 Beer33 Wine | Registered | 2023 |
| CICIKEY 2068198 · TMA1161297 | an individual | 11 Lighting | Registered | 2023 |
| COGZYAS 2066928 · TMA1133436 | Eisai R&D Management Co. Ltd. | 5 Pharmaceuticals | Registered | 2022 |