| CONICA 1435360 · TMA770957 | Construction Research & Technology GmbH | 1 Chemicals2 Paints | Registered | 2010 |
| COMICO 2035425 | an individual | 5 Pharmaceuticals | Pending | 2020 |
| Comius 2155010 · TMA1217434 | an individual | 14 Jewellery16 Paper21 Housewares+1 | Registered | 2024 |
| comiso 2135990 · TMA1242393 | an individual | 9 Electronics | Registered | 2024 |
| COMAC 2006325 · TMA1145383 · design | CO.MAC. SRL | 7 Machines37 Construction | Registered | 2022 |
| CMIC 1936434 · TMA1122610 · design | Computer Methods International Corp. | 9 Electronics35 Advertising41 Education+1 | Registered | 2022 |
| CHOUMICHA 1829809 · TMA1052182 | an individual | 3 Cosmetics30 Coffee43 Restaurants | Registered | 2019 |
| CIMIC 1744576 · TMA1021780 | CIMIC Group Limited | 9 Electronics16 Paper35 Advertising+4 | Registered | 2019 |
| COMAC 1733466 · TMA965147 · design | Commercial Aircraft Corporation of China, Ltd. | 7 Machines12 Vehicles37 Construction+1 | Registered | 2017 |
| COMIGO 1720664 · TMA943707 | Comigo Ltd. | 9 Electronics28 Toys | Registered | 2016 |
| COMIX 1231126 · TMA648779 · design | SHENZHEN COMIX GROUP CO. LTD. | 16 Paper | Registered | 2005 |
| CMIC 1175917 · TMA613311 · design | Computer Methods International Corp. | 9 Electronics35 Advertising41 Education+1 | Registered | 2004 |
| CANICA 0873531 · TMA550371 | Canica Design Inc. | 8 Hand10 Medical42 Science | Registered | 2001 |
| COMESA 0973137 · design | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2012 |
| COMESA 0973135 | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2012 |
| COMMISH 2142147 · TMA1201525 · design | COMMISH | 18 Leather25 Clothing | Registered | 2023 |
| CAMISHA 1124523 · TMA605923 | Owner not shown | 9 Electronics10 Medical42 Science+1 | Registered | 2004 |
| COMESSA 0848812 · TMA517763 · design | COMESSA | 1 Chemicals4 Oils6 Metal+5 | Registered | 1999 |
| COMECOI 2374373 | Dongguan Zhaochun Electronic Technology Co. Ltd. | 18 Leather | Pending | 2025 |
| ComWish 2314502 | an individual | 18 Leather | Pending | 2024 |
| CHUNCHIU 2264469 · TMA1284854 · design | YONGSHENG INTERNATIONAL BRAND MANAGEMENT GROUP CO. LIMITED | 10 Medical | Registered | 2025 |
| CONSCO 2256123 · TMA1279193 | LES ALIMENTS CONSCO FOODS INC. | 29 Meat35 Advertising39 Transport+1 | Registered | 2024 |
| CAANQI 2253364 · TMA1271535 | Anqi Houshold CA Inc. | 11 Lighting18 Leather20 Furniture | Registered | 2024 |
| CANUCKS 2241870 · TMA1241949 · design | Vancouver Canucks Limited Partnership | 9 Electronics14 Jewellery16 Paper+5 | Registered | 2024 |
| CANACK 2233686 · TMA1254140 · design | Canack Technology Ltd | 10 Medical | Registered | 2024 |