| CanDrive 0914599 | Service de Santé des Soeurs de la Charité D'Ottawa Inc. | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2004 |
| CONTRAVE 1488558 · TMA1011811 · design | Nalpropion Pharmaceuticals LLC | 5 Pharmaceuticals16 Paper44 Medical | Registered | 2018 |
| CONTRAVE 1454998 · TMA1011818 | Nalpropion Pharmaceuticals LLC | 16 Paper44 Medical | Registered | 2018 |
| CONTRAVE 1306356 · TMA765793 | Nalpropion Pharmaceuticals LLC | 5 Pharmaceuticals | Registered | 2010 |
| CHAINDRIVE 1066222 · TMA571558 | MULTIDEV TECHNOLOGIES INC. | 9 Electronics | Registered | 2002 |
| CONTRINEX 1618878 · TMA910772 · design | Contrinex SA | 9 Electronics | Registered | 2015 |
| CONTRINEX 2273344 | Owner not listed | 9 Electronics | Pending | 2023 |
| CHONDROIZER 1748159 · TMA1031470 | KOWA COMPANY LTD. | 5 Pharmaceuticals | Registered | 2019 |
| CONTRIK 2159809 · TMA1232278 · design | an individual | 9 Electronics | Registered | 2024 |
| CENDRE 1995181 · TMA1260559 | VICOSTONE JOINT STOCK COMPANY | 19 Building20 Furniture | Registered | 2024 |
| Candrone 1786802 · TMA994647 | Dronelogics Systems Inc | 12 Vehicles | Registered | 2018 |
| CANDRIMA 1762955 · TMA1018920 · design | AVEDA CORPORATION | 3 Cosmetics | Registered | 2019 |
| CANDRIAM 1644621 · TMA922559 | Candriam | 36 Finance | Registered | 2015 |
| CONDAIR 1464006 · TMA871228 · design | an individual | 6 Metal9 Electronics11 Lighting+1 | Registered | 2014 |
| CONTIRE 1348857 · TMA765617 | CONTINENTAL REIFEN DEUTSCHLAND GMBH | 12 Vehicles | Registered | 2010 |
| CANDRE 1334972 · TMA760423 | ROBERN, INC. a Pennsylvania corporation | 20 Furniture | Registered | 2010 |
| CONDORIN 0838758 · TMA500665 · design | an individual | 25 Clothing | Registered | 1998 |
| CANDRIL 0258613 · TMA122874 | Robertson Inc. | 6 Metal | Registered | 1961 |
| "CONDAIR" 0212170 · UCA40221 | an individual | 7 Machines11 Lighting12 Vehicles | Registered | 1951 |
| CANDRE 2016033 | Candre Cannabis Inc. | 3 Cosmetics5 Pharmaceuticals18 Leather+7 | Pending | 2020 |
| CHONDROGEN 1652673 · TMA924264 | an individual | 5 Pharmaceuticals | Registered | 2015 |
| ControLite 1062014 · TMA563532 | Owner not shown | 19 Building | Registered | 2002 |
| Centripet 2228340 · TMA1244545 | an individual | 42 Science | Registered | 2024 |
| CENTRITEC 2191125 · TMA1218696 | The Carlyle Johnson Machine Company, LLC | 7 Machines | Registered | 2024 |
| CENTRAIDE 1926721 · TMA1160721 | Owner not shown | 35 Advertising36 Finance41 Education | Registered | 2023 |