| CONSTANT 1966566 · TMA1285169 | CONSTANT INTERNATIONAL INC. | 1 Chemicals37 Construction40 Treatment+1 | Registered | 2025 |
| CONSTANT 2284735 · design | Etoile de Lion Inc. | 30 Coffee | Pending | 2023 |
| CONSTRUCT 2206877 · TMA1282844 | an individual | 20 Furniture41 Education | Registered | 2025 |
| CONSTRUCT 2023576 · TMA1160986 | Vans, Inc. | 18 Leather | Registered | 2023 |
| CONSTEL 2022715 · TMA1115415 · design | UPL LTD. | 1 Chemicals5 Pharmaceuticals | Registered | 2021 |
| CONSAT 2014049 · TMA1216743 | an individual | 7 Machines9 Electronics12 Vehicles+4 | Registered | 2024 |
| CONSTANCY 1896380 · TMA1082070 · design | Weifang Yuelong Rubber Co. Ltd. | 12 Vehicles | Registered | 2020 |
| ConStannic 1840023 · TMA1033857 | Atotech Deutschland GmbH | 1 Chemicals7 Machines | Registered | 2019 |
| CONSTRUCT 1745420 · TMA978159 | Eagle View Technologies, Inc. | 42 Science | Registered | 2017 |
| CONSTRUCT 1677254 · TMA919177 | Construct Electrical Inc. | 37 Construction | Registered | 2015 |
| CONSTANCE 1565737 · TMA892235 | an individual | 18 Leather | Registered | 2014 |
| CONSTELLA 1485579 · TMA878286 | Ironwood Pharmaceuticals, Inc. | 5 Pharmaceuticals | Registered | 2014 |
| CONSTANTIA 1211162 · TMA685931 | Microsoft Corporation | 9 Electronics | Registered | 2007 |
| CONSTECO 0990795 · NFLD795 | CONSOLIDATED STEEL CORPORATION (A DELAWARE CORPORATION) | 1 Chemicals6 Metal7 Machines+9 | Registered | 1919 |
| CONSTANTIA 0894062 · TMA559443 | Constantia Flexibles Group GmbH | 1 Chemicals5 Pharmaceuticals6 Metal+8 | Registered | 2002 |
| CONSOTROL 0232240 · TMA103096 | Schneider Electric Systems USA, Inc. | 9 Electronics18 Leather | Registered | 1956 |
| CONSTANCE 2341955 · design | Owner not listed | 25 Clothing35 Advertising | Pending | 2024 |
| CONSTRACT 2289122 · design | Owner not shown | 20 Furniture40 Treatment | Pending | 2023 |
| CONSTELLA 2103549 | CONSTELLA INTELLIGENCE, INC. | 42 Science | Pending | 2021 |
| CONSTANTIA 0928184 · design | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2024 |
| CONSTANTIA 0928182 | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2024 |
| CANSTART 0909296 | CANADIAN PSYCHOLOGICAL ASSOCIATION | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1997 |
| constantlife 2256194 · TMA1274717 | an individual | 14 Jewellery | Registered | 2024 |
| CONSTANTINE 1911381 · TMA1091802 · design | CONSTANTINE ENTERPRISES INC. | 36 Finance37 Construction | Registered | 2021 |
| CONSTANTINE 1911380 · TMA1091801 | CONSTANTINE ENTERPRISES INC. | 36 Finance37 Construction | Registered | 2021 |