| COMMAX 0661529 · TMA418063 · design | Commax Co., Ltd. | 9 Electronics | Registered | 1993 |
| COMAX 0645035 · TMA376294 · design | an individual | 35 Advertising39 Transport40 Treatment+1 | Registered | 1990 |
| COMAX 0633503 · TMA372157 | an individual | 35 Advertising39 Transport40 Treatment+1 | Registered | 1990 |
| COMAC 2006325 · TMA1145383 · design | CO.MAC. SRL | 7 Machines37 Construction | Registered | 2022 |
| COMOX 1785106 · TMA998887 · design | Comox Pacific Express Ltd. | 35 Advertising39 Transport | Registered | 2018 |
| COMAC 1733466 · TMA965147 · design | Commercial Aircraft Corporation of China, Ltd. | 7 Machines12 Vehicles37 Construction+1 | Registered | 2017 |
| CAMAX 1690377 · TMA932571 | CAMAX OPTICAL CORP. | 9 Electronics | Registered | 2016 |
| CANMAX 1407313 · TMA778495 | Voxx International Corporation, a Delaware corporation | 9 Electronics12 Vehicles | Registered | 2010 |
| CONAX 1375963 · TMA761078 | an individual | 9 Electronics16 Paper37 Construction+3 | Registered | 2010 |
| CMAX 1303810 · TMA692725 | STERIS Inc. (A Delaware corporation) | 10 Medical | Registered | 2007 |
| COMIX 1231126 · TMA648779 · design | SHENZHEN COMIX GROUP CO. LTD. | 16 Paper | Registered | 2005 |
| COMEX 1122854 · TMA587701 | ROLEX SA | 14 Jewellery | Registered | 2003 |
| CMAX 1021844 · TMA539922 · design | UAP INC. | 1 Chemicals3 Cosmetics7 Machines+7 | Registered | 2001 |
| COMEX 0733059 · TMA448545 · design | Owner not shown | 2 Paints6 Metal | Registered | 1995 |
| COMEX 0674808 · TMA391868 | New York Mercantile Exchange, Inc. | 36 Finance | Registered | 1991 |
| COIMEX 2002978 · design | Owner not shown | 35 Advertising36 Finance37 Construction | Pending | 2019 |
| CO2NNEX 2152873 · TMA1189919 · design | Mitsubishi Heavy Industries, Ltd. | 42 Science | Registered | 2023 |
| 3Commas 2037901 | Owner not shown | 35 Advertising36 Finance42 Science | Pending | 2020 |
| 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 |
| CANACK 2230188 · TMA1252964 · design | Canack Technology Ltd | 10 Medical | Registered | 2024 |
| CAMEOS 2225967 · TMA1252563 | PlayMonster Group LLC | 28 Toys | Registered | 2024 |