| CLUTTERMAN 1947869 · TMA1202092 | an individual | 39 Transport44 Medical | Registered | 2023 |
| CLUTTERBUG 1919995 · TMA1103910 · design | 2695608 Ontario Inc. | 9 Electronics16 Paper41 Education | Registered | 2021 |
| CLUTTERBUG 1919994 · TMA1146339 | 2695608 Ontario Inc. | 9 Electronics16 Paper41 Education | Registered | 2022 |
| CLUTTER 1843051 · TMA1043971 | Clutter Inc. | 35 Advertising38 Telecommunications39 Transport | Registered | 2019 |
| ClutterHappy 2171314 | 1324535 B.C. Ltd. | 20 Furniture21 Housewares | Pending | 2022 |
| 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 |
| CAULDRON 2198055 · TMA1197268 · design | ProbablyMonsters Inc. | 9 Electronics42 Science | Registered | 2023 |
| 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 |
| CAULDRON 2167400 · TMA1201927 | Bohning Company Ltd. | 28 Toys | Registered | 2023 |
| CAULDRON 2164094 · TMA1197177 | ProbablyMonsters Inc. | 9 Electronics41 Education42 Science | Registered | 2023 |
| CLOUDRUNNER 2163809 · TMA1272491 | On Clouds GmbH | 18 Leather25 Clothing28 Toys | Registered | 2024 |
| Cloudtrax 2154440 · TMA1272453 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |
| CULTERA 2151165 · TMA1200451 | DR. BABOR GMBH & CO. KG | 3 Cosmetics | Registered | 2023 |
| CHILDARK 2147641 · TMA1226035 | BABYARK LTD. | 12 Vehicles | Registered | 2024 |
| COLTURE 2145112 · TMA1243862 | Colture Holdings LLC | 25 Clothing35 Advertising36 Finance+1 | Registered | 2024 |
| CALATRAVA 2136840 · TMA1240976 | PATEK, PHILIPPE SA GENÈVE | 14 Jewellery | Registered | 2024 |
| CellTRON 2136696 · TMA1229317 | MSE Filterpressen GmbH; Riccardo Rumé | 7 Machines | Registered | 2024 |
| CALTRAN 2107739 · TMA1191781 | Calumet Refining, LLC A Delaware limited liability company | 17 Rubber | Registered | 2023 |
| CALTHERM 2092598 · TMA1210660 | an individual | 1 Chemicals4 Oils | Registered | 2023 |