| COMBINEERING 1917814 · TMA1116761 | an individual | 40 Treatment42 Science | Registered | 2021 |
| CANBANTING 2128789 · TMA1255619 | TJIKKO INTERNATIONAL HOLDINGS LTD. | 5 Pharmaceuticals29 Meat30 Coffee+3 | Registered | 2024 |
| COMPANION 2045450 · TMA1282058 | an individual | 9 Electronics44 Medical | Registered | 2025 |
| Companero 2016564 · TMA1159874 | NORAC CONCEPTS, INC. | 1 Chemicals | Registered | 2023 |
| COMPANIO 1813246 · TMA1073146 | an individual | 9 Electronics10 Medical38 Telecommunications+2 | Registered | 2020 |
| COMPANTA 1620721 · TMA892961 | MACDONALD & MUIR LIMITED | 33 Wine | Registered | 2014 |
| COMPANION 1571433 · TMA861105 | Uniwell International Enterprises Corp | 12 Vehicles35 Advertising37 Construction | Registered | 2013 |
| COMPANION 1391808 · TMA743660 | GROWTH PRODUCTS LTD., a Corporation of the State of New York | 5 Pharmaceuticals | Registered | 2009 |
| COMPANION 1176102 · TMA621713 | BOSE CORPORATION | 9 Electronics | Registered | 2004 |
| COMPANION 1093738 · TMA711496 | DPH Biologicals, LLC | 1 Chemicals | Registered | 2008 |
| COMPANION 1042698 · TMA553523 · design | GROUPE CIS LTÉE/CIS GROUP LTD | 35 Advertising | Registered | 2001 |
| COMPANION 1034472 · TMA587532 | Transform SR Brands LLC | 7 Machines8 Hand9 Electronics+3 | Registered | 2003 |
| COMPANION 1034471 · TMA545837 · design | Transform SR Brands LLC | 7 Machines8 Hand9 Electronics+2 | Registered | 2001 |
| COMPANION 0709142 · TMA440817 | Industrielle Alliance, Assurance et services financiers inc. / Industrial Alliance Insurance and Financial Services Inc. | 36 Finance | Registered | 1995 |
| COMPANION 0650380 · TMA389380 | Caire Medical Ltd. | 10 Medical | Registered | 1991 |
| COMPANION 2304848 | B & W Custom Truck Beds, Inc. | 12 Vehicles | Pending | 2024 |
| Companion + 2171475 | Deutsche Aircraft GmbH | 9 Electronics12 Vehicles37 Construction+2 | Pending | 2021 |
| Companion 2171474 | Deutsche Aircraft GmbH | 9 Electronics12 Vehicles37 Construction+2 | Pending | 2021 |
| COMPMETRICA 2330845 · TMA1269105 · design | COMPMETRICA INC. | 9 Electronics16 Paper35 Advertising+1 | Registered | 2024 |
| COMPMETRICA 1551774 · TMA859080 · design | COMPMETRICA INC. | 9 Electronics16 Paper35 Advertising+1 | Registered | 2013 |
| COMPMETRICA 1313777 · TMA709088 | COMPMETRICA INC. | 9 Electronics16 Paper35 Advertising+1 | Registered | 2008 |
| COMBINATORX 1246961 · TMA744896 | CombinatoRx, Incorporated | 5 Pharmaceuticals42 Science44 Medical | Registered | 2009 |
| COMFYMOVE 2261010 · TMA1279542 | 1895968 Ontario Inc. | 39 Transport45 Legal | Registered | 2024 |
| COMPEONY 2257906 · TMA1276439 · design | Compeony BioTech Canada Ltd. | 3 Cosmetics29 Meat | Registered | 2024 |
| CHAMPION 2247872 · TMA1267220 | ABG-Champion LLC | 5 Pharmaceuticals | Registered | 2024 |