| CONCHECK 2102782 · design | Owner not shown | 42 Science | Pending | 2021 |
| COMCHEQ 0793983 · TMA472851 · design | CERIDIAN CANADA LTD. | 9 Electronics16 Paper36 Finance | Registered | 1997 |
| COMMQUEST 1001219 · TMA523827 | COMMONWEALTH OIL CORPORATION | 4 Oils | Registered | 2000 |
| CommSecur 2231575 | 4364546 Canada Inc. - Canadian Technology Systems (CTS) | 13 Firearms45 Legal | Pending | 2023 |
| 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 |
| ComMusicate 1966822 · TMA1244664 | an individual | 9 Electronics | Registered | 2024 |
| CANEXIS 1963989 · TMA1237846 | Cantel Medical Corp. | 9 Electronics | Registered | 2024 |
| 10,000 CHANGES 1938873 · TMA1179745 | THE ROYAL CANADIAN GEOGRAPHICAL SOCIETY | 9 Electronics16 Paper21 Housewares+7 | Registered | 2023 |
| CANNASUCRES 1936092 · TMA1126118 | ROSE LIFESCIENCE INC. | 1 Chemicals3 Cosmetics5 Pharmaceuticals+3 | Registered | 2022 |
| ChemCycling 1933115 · TMA1146194 | Owner not shown | 1 Chemicals40 Treatment | Registered | 2022 |