| COMTRAC 1622897 · TMA944601 | an individual | 7 Machines9 Electronics37 Construction+1 | Registered | 2016 |
| COMTRAD 1349303 · TMA725175 · design | COMTRAD STRATEGIC SOURCING INC. | 35 Advertising39 Transport | Registered | 2008 |
| COMTRAC 0703141 · TMA436756 | Huesker Synthetic GmbH | 6 Metal17 Rubber19 Building+2 | Registered | 1994 |
| COMTRAC 0691910 · TMA439393 | STOBER Drives, Inc. | 7 Machines9 Electronics11 Lighting | Registered | 1995 |
| COMTRAD 0608836 · TMA359361 | COMTRAD STRATEGIC SOURCING INC. | 35 Advertising | Registered | 1989 |
| COMTREX 0398983 · TMA226854 | an individual | 5 Pharmaceuticals | Registered | 1978 |
| CONTRAX 0365964 · TMA198836 | Signode International IP Holdings LLC | 6 Metal10 Medical12 Vehicles+3 | Registered | 1974 |
| COMATRIX 1135945 · TMA604343 | SpinTek Filtration, Inc. | 9 Electronics11 Lighting | Registered | 2004 |
| COMTRUE 2109059 · TMA1177769 | an individual | 9 Electronics | Registered | 2023 |
| 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 |
| CONTRAM 1781218 · TMA1052520 | Lubrizol Deutschland GmbH | 5 Pharmaceuticals | Registered | 2019 |
| Controx 1780731 · TMA1037389 | Chemische Werke Kluthe GmbH | 1 Chemicals2 Paints3 Cosmetics | Registered | 2019 |
| 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 |
| CONTROX 0550076 · TMA342688 | Probat-Werke von Gimborn Maschinenfabrik GmbH | 7 Machines | Registered | 1988 |
| CONTREX 0321636 · TMA171997 | an individual | 32 Beer | Registered | 1970 |
| CONTRA 2101467 | Contra.Work Inc. | 9 Electronics35 Advertising36 Finance+2 | Pending | 2021 |
| CONTRAST 2249451 · TMA1267406 | 2612363 ONTARIO LIMITED | 9 Electronics35 Advertising36 Finance+4 | Registered | 2024 |
| CAMTREAD 1964791 · TMA1233065 | Cambro Manufacturing Company | 21 Housewares | Registered | 2024 |
| COMITROL 1915938 · TMA1130100 | URSCHEL LABORATORIES, INC. | 7 Machines | Registered | 2022 |
| COMETRON 1725114 · TMA938177 | Celestron Acquisition, LLC | 9 Electronics | Registered | 2016 |