| CONTRA 1992686 · TMA1275139 | KONAMI DIGITAL ENTERTAINMENT CO., LTD., a legal entity | 9 Electronics16 Paper28 Toys+1 | Registered | 2024 |
| CONTRA 1956398 · TMA1220908 | Valens Agritech Ltd. | 34 Tobacco | Registered | 2024 |
| CONTRAK 1626455 · TMA947145 | 9351-5542 QUEBÉC INC. | 6 Metal | Registered | 2016 |
| ConTRAK 1246337 · TMA660240 | P2 Energy Solutions Alberta ULC | 9 Electronics | Registered | 2006 |
| CONTRAC 1232734 · TMA698329 | FGI Canada Ltd. | 11 Lighting20 Furniture | Registered | 2007 |
| CONTRAC 0664116 · TMA391735 | Bell Laboratories, Inc. | 5 Pharmaceuticals | Registered | 1991 |
| CONTRA 0648001 · TMA388285 | Konami Digital Entertainment Co. Ltd. | 9 Electronics16 Paper28 Toys | Registered | 1991 |
| CONTRAX 0365964 · TMA198836 | Signode International IP Holdings LLC | 6 Metal10 Medical12 Vehicles+3 | Registered | 1974 |
| CONTRA 2101467 | Contra.Work Inc. | 9 Electronics35 Advertising36 Finance+2 | Pending | 2021 |
| CONTRAMID 0704350 · TMA425622 | Endo Operations Limited | 1 Chemicals | Registered | 1994 |
| CONTRAST 2249451 · TMA1267406 | 2612363 ONTARIO LIMITED | 9 Electronics35 Advertising36 Finance+4 | Registered | 2024 |
| CONTRAIL 1707333 · TMA967171 | an individual | 12 Vehicles | Registered | 2017 |
| 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 |
| CONTRANS 1208895 · TMA640720 | TForce Holdings Inc. | 37 Construction39 Transport41 Education | Registered | 2005 |
| CONTRACK 0888052 · TMA529751 | COTE-RECO INC. | 25 Clothing | Registered | 2000 |
| CONTRAST 0872146 · TMA512802 | REITMANS (CANADA) LIMITED/REITMANS (CANADA) LIMITEE | 9 Electronics14 Jewellery18 Leather+2 | Registered | 1999 |
| CONTRADA 0868718 · TMA546481 | TRENDWAY CORPORATION | 20 Furniture | Registered | 2001 |
| CONTRACK 0806671 · TMA504303 | COTE-RECO INC. | 25 Clothing | Registered | 1998 |
| CONTRAIL 1988000 | JUNIPER NETWORKS, INC. | 9 Electronics37 Construction41 Education+1 | Pending | 2019 |
| CONTRIK 2159809 · TMA1232278 · design | an individual | 9 Electronics | Registered | 2024 |
| CENTRAK 2118134 · TMA1226815 | CenTrak Inc. | 9 Electronics42 Science45 Legal | Registered | 2024 |
| CENTRUM 2082112 · TMA1203858 · design | GlaxoSmithKline Consumer Healthcare Holdings (US) LLC | 5 Pharmaceuticals | Registered | 2023 |