| CONTRASTE 1798394 · TMA1052276 · design | LITELINE CORPORATION | 11 Lighting40 Treatment | Registered | 2019 |
| CONTRASTE 1597163 · TMA907314 | LITELINE CORPORATION | 11 Lighting40 Treatment | Registered | 2015 |
| CENTRALVIEW 1381746 · TMA777182 | Hewlett Packard Enterprise Development LP | 9 Electronics | Registered | 2010 |
| CONTRASTE 0806352 · TMA470052 | LITELINE CORPORATION | 11 Lighting | Registered | 1997 |
| CONTRAST 2249451 · TMA1267406 | 2612363 ONTARIO LIMITED | 9 Electronics35 Advertising36 Finance+4 | Registered | 2024 |
| CONTRASTA 2190435 · TMA1190087 | MASCO CANADA LIMITED | 11 Lighting | Registered | 2023 |
| CONTRASTMAX 1908545 · TMA1098891 | CHROMA TECHNOLOGY CORP. | 9 Electronics | Registered | 2021 |
| CONTRAST 1597165 · TMA913495 | LITELINE CORPORATION | 11 Lighting40 Treatment | Registered | 2015 |
| 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 |
| CONTRAST 0872146 · TMA512802 | REITMANS (CANADA) LIMITED/REITMANS (CANADA) LIMITEE | 9 Electronics14 Jewellery18 Leather+2 | Registered | 1999 |
| CONTRASED 2260167 | Owner not listed | 5 Pharmaceuticals | Pending | 2023 |
| CONTRASTA 2245568 | Owner not listed | 21 Housewares | Pending | 2023 |
| ControllerView 1979544 · TMA1107513 | Adenza, Inc. | 42 Science | Registered | 2021 |
| ControllerView 1978501 · TMA1107483 | Adenza, Inc. | 9 Electronics | Registered | 2021 |
| CONTROLLERVIEW 1927324 · TMA1098230 | Adenza, Inc. | 9 Electronics | Registered | 2021 |
| CONTRACTOSEAL 1413516 · TMA756899 | GESTION SOPREMA CANADA INC. / HOLDING SOPREMA CANADA INC. | 1 Chemicals2 Paints3 Cosmetics+2 | Registered | 2010 |
| CENTRATE 1860714 · TMA1038640 | Zoetis Services LLC | 10 Medical | Registered | 2019 |
| CONTRAIL 1707333 · TMA967171 | an individual | 12 Vehicles | Registered | 2017 |
| CENTRESTAGE 1674944 · TMA974911 | The Centre in the Square Inc. | 35 Advertising41 Education43 Restaurants | Registered | 2017 |
| CENTROSTYLE 1647547 · TMA952033 | an individual | 3 Cosmetics5 Pharmaceuticals7 Machines+3 | Registered | 2016 |
| CONTRACTERP 1411135 · TMA796915 | Access Information Technologies, Inc. | 9 Electronics | Registered | 2011 |
| CONTROSTEAM 1400990 · TMA814554 | ALSTOM POWER SYSTEMS SA | 9 Electronics11 Lighting37 Construction+2 | Registered | 2011 |
| CENTRAVIS 1344811 · TMA783045 | Centravis Sales (Switzerland) SA | 6 Metal7 Machines11 Lighting+1 | Registered | 2010 |