| CORISCOS 1639038 · TMA936930 | 953517 Ontario Limited | 29 Meat | Registered | 2016 |
| CURIOUSCAST 1909578 · TMA1107946 | Corus Entertainment Inc. | 38 Telecommunications41 Education | Registered | 2021 |
| CRISYS 1026065 · TMA559474 · design | Crisys Limited | 9 Electronics | Registered | 2002 |
| CORECAST 2344465 | Owner not listed | 9 Electronics19 Building20 Furniture | Pending | 2024 |
| CORSYS 2255235 | Maquet GmbH | 10 Medical | Pending | 2023 |
| CoreShack 1605571 · TMA883370 | Trans Globe Communications inc. | 35 Advertising38 Telecommunications41 Education+1 | Registered | 2014 |
| CARGOSCAN 1365257 · TMA743788 | Mettler-Toledo GmbH | 9 Electronics | Registered | 2009 |
| CORESIGNAL 2090757 · TMA1209547 · design | Binary House LLC | 9 Electronics35 Advertising38 Telecommunications+1 | Registered | 2023 |
| CORAXIS 1914107 · TMA1091949 | Elanco US Inc. | 5 Pharmaceuticals | Registered | 2021 |
| CHRYSOS 1853452 · TMA1092467 | CHRYSOS CORPORATION LIMITED, An Australian Corporation, ACN: 613 131 141 | 9 Electronics42 Science | Registered | 2021 |
| CROCOS 1712792 · TMA1069634 | LIDL STIFTUNG & CO. KG | 30 Coffee | Registered | 2020 |
| CROCUS 1670859 · TMA919705 | Paul Bertrand SAS | 33 Wine | Registered | 2015 |
| Corsec 1644258 · TMA916403 | Corsec Security, Inc. | 41 Education42 Science | Registered | 2015 |
| CYRACOS 1414567 · TMA770045 | an individual | 1 Chemicals3 Cosmetics5 Pharmaceuticals+2 | Registered | 2010 |
| CHARCOCAPS 1296144 · TMA750209 · design | DSE Healthcare Solution, LLC | 5 Pharmaceuticals | Registered | 2009 |
| CORSICO 1189782 · TMA635898 | ETOBICOKE NOODLES INC. | 30 Coffee43 Restaurants | Registered | 2005 |
| CRUISESCAPES 1116377 · TMA594588 | H.I.S. CANADA TRAVEL INC. | 39 Transport43 Restaurants | Registered | 2003 |
| CORSAGE 0805097 · TMA486913 | Lonsdale BV Investments Inc. | 3 Cosmetics | Registered | 1997 |
| CIRCUS 0773619 · TMA455525 · design | Imarketing Solutions Group Inc. | 9 Electronics14 Jewellery16 Paper+10 | Registered | 1996 |
| CRÉSUS 0764290 · TMA446778 | Croesus Finansoft Inc. | 9 Electronics | Registered | 1995 |
| CIRCUS 0431365 · TMA240405 | Bell Media Inc. | 38 Telecommunications | Registered | 1980 |
| CERCAST 0349389 · TMA187281 | Howmet Canada Company | 6 Metal | Registered | 1972 |
| Coraxess 2345722 | Owner not listed | 35 Advertising42 Science | Pending | 2024 |
| CHRYSUS 2345599 · design | CHRYSUS ARTISAN INC. | 14 Jewellery35 Advertising | Pending | 2024 |
| Chrysus 2337953 | CHRYSUS ARTISAN INC. | 14 Jewellery35 Advertising | Pending | 2024 |