| CellTRON 2136696 · TMA1229317 | MSE Filterpressen GmbH; Riccardo Rumé | 7 Machines | Registered | 2024 |
| CELTRON 1021821 · TMA540915 | Cableserv Inc. | 9 Electronics | Registered | 2001 |
| CAULDRON 2198055 · TMA1197268 · design | ProbablyMonsters Inc. | 9 Electronics42 Science | Registered | 2023 |
| CAULDRON 2167400 · TMA1201927 | Bohning Company Ltd. | 28 Toys | Registered | 2023 |
| CAULDRON 2164094 · TMA1197177 | ProbablyMonsters Inc. | 9 Electronics41 Education42 Science | Registered | 2023 |
| CALTRAN 2107739 · TMA1191781 | Calumet Refining, LLC A Delaware limited liability company | 17 Rubber | Registered | 2023 |
| CELLTROL 2076702 · TMA1280417 | CellChem Pharmaceuticals Inc. | 5 Pharmaceuticals | Registered | 2025 |
| CHYLOTREZ 1974395 · TMA1120248 | an individual | 5 Pharmaceuticals | Registered | 2022 |
| CAULDRON 1931156 · TMA1115342 | Bohning Company Ltd. | 28 Toys | Registered | 2021 |
| COLTRANE 1837416 · TMA1028795 | Adama Agan Ltd. | 5 Pharmaceuticals | Registered | 2019 |
| CELLTRION 1534717 · TMA925747 · design | Celltrion Holdings Co., Ltd. | 5 Pharmaceuticals40 Treatment42 Science | Registered | 2016 |
| CELLTRION 1477265 · TMA916610 | Celltrion Holdings Co., Ltd. | 5 Pharmaceuticals35 Advertising40 Treatment+1 | Registered | 2015 |
| CALTRAN 1473104 · TMA786538 | C-FER Technologies (1999) Inc. | 9 Electronics | Registered | 2011 |
| CHILDRUN 1996854 | BRITISH COLUMBIA'S CHILDREN'S HOSPITAL FOUNDATION | 16 Paper36 Finance41 Education | Pending | 2019 |
| CHILDRUN 0905405 | BRITISH COLUMBIA'S CHILDREN'S HOSPITAL FOUNDATION | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1992 |
| CLITERATE 2221150 · TMA1239008 | an individual | 16 Paper | Registered | 2024 |
| COLDTURE 2206598 · TMA1241427 · design | Cold Tribe Wellness Inc. | 11 Lighting | Registered | 2024 |
| CLOUDTRADER4 2199242 · TMA1277494 · design | Hunan Byron Network Technology Co. Ltd. | 9 Electronics36 Finance | Registered | 2024 |
| Caldarax 2193362 · TMA1234968 | an individual | 11 Lighting | Registered | 2024 |
| Cloudrift 2188016 · TMA1272600 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |
| CLOUDWORLD 2186573 · TMA1214690 | Oracle International Corporation | 35 Advertising41 Education | Registered | 2023 |
| Clatronic 2180140 · TMA1229448 | Shenzhen Xike Technology Co. LTD. | 21 Housewares | Registered | 2024 |
| #CULTURETAGS 2175667 · TMA1226245 | Culture Brands, LLC | 28 Toys | Registered | 2024 |
| CLOUDRUNNER 2163809 · TMA1272491 | On Clouds GmbH | 18 Leather25 Clothing28 Toys | Registered | 2024 |
| Cloudtrax 2154440 · TMA1272453 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |