| COMGEST 1430390 · TMA792834 | Owner not shown | 35 Advertising36 Finance38 Telecommunications | Registered | 2011 |
| COMCAST 1816276 · TMA1031073 | Comcast Corporation | 38 Telecommunications41 Education | Registered | 2019 |
| COMCAST 1816271 · TMA1011311 | Comcast Corporation | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2018 |
| COMCAST 1813330 · TMA1011313 | Comcast Corporation | 37 Construction38 Telecommunications41 Education | Registered | 2018 |
| COMCAST 1362798 · TMA730645 | Comcast Corporation | 38 Telecommunications41 Education | Registered | 2008 |
| COMCHEQ 0793983 · TMA472851 · design | CERIDIAN CANADA LTD. | 9 Electronics16 Paper36 Finance | Registered | 1997 |
| COMCAST 0713442 · TMA433365 | COMALCO ALUMINIUM LIMITED | 19 Building | Registered | 1994 |
| CONIKOS 2302302 · design | Owner not listed | 29 Meat30 Coffee | Pending | 2023 |
| COMMQUEST 1001219 · TMA523827 | COMMONWEALTH OIL CORPORATION | 4 Oils | Registered | 2000 |
| CHANGESELF 2249917 · TMA1268795 · design | Changeself Technology (Shenzhen) Co. Ltd. | 9 Electronics35 Advertising42 Science | Registered | 2024 |
| CONNEXIS 2224211 · TMA1241887 | Phoenix Contact GmbH & Co. KG | 9 Electronics | Registered | 2024 |
| CamCasle 2186929 · TMA1234584 | shenzhen feiyan huanqiu E-Commerce Co.Ltd | 9 Electronics | Registered | 2024 |
| CamCoach 2167327 · TMA1200535 | Spireon, Inc. | 9 Electronics | Registered | 2023 |
| COMSIGN 2141270 · TMA1206204 | ComSign Ltd. | 42 Science | Registered | 2023 |
| cannookies 2123446 · TMA1186589 | an individual | 30 Coffee | Registered | 2023 |
| CAMZYOS 2117717 · TMA1193613 · design | MyoKardia, Inc. | 5 Pharmaceuticals | Registered | 2023 |
| Cimkiz 2112345 · TMA1269193 | Shenzhen Cimkiz Technology Co. Ltd. | 6 Metal20 Furniture28 Toys | Registered | 2024 |
| CANNACASE 2094791 · TMA1172511 | an individual | 34 Tobacco | Registered | 2023 |
| CANNASUCRES 2086849 · TMA1107884 | ROSE LIFESCIENCE INC. | 30 Coffee32 Beer | Registered | 2021 |
| CANESEEKER 2043754 · TMA1151659 | MARK ANTHONY GROUP INC. | 33 Wine | Registered | 2022 |
| Canachoice 2030389 · TMA1141244 | an individual | 9 Electronics | Registered | 2022 |
| CAMZYOS 2023662 · TMA1193214 | MyoKardia, Inc. | 5 Pharmaceuticals | Registered | 2023 |
| CHAINSHOUSE 2023188 · TMA1137458 · design | Guangzhoushi Beicheng Trade Co Ltd | 14 Jewellery | Registered | 2022 |
| CanSecWest 2015049 · TMA1130642 | an individual | 41 Education | Registered | 2022 |
| CanKeg 1973356 · TMA1128827 | an individual | 6 Metal11 Lighting21 Housewares | Registered | 2022 |