| CEMATRIX 1018353 · TMA540978 | Cematrix (Canada) Inc. | 1 Chemicals7 Machines19 Building+6 | Registered | 2001 |
| COMTRAX 1803072 · TMA1030546 | Comtrax Logistics Solutions Inc. | 35 Advertising39 Transport40 Treatment | Registered | 2019 |
| COMETRIQ 1596821 · TMA917450 | Exelixis, Inc. | 5 Pharmaceuticals | Registered | 2015 |
| COMTREX 0398983 · TMA226854 | an individual | 5 Pharmaceuticals | Registered | 1978 |
| CHEMMATRIX 1082431 · TMA568617 | MATRIX INNOVATION INC. | 1 Chemicals | Registered | 2002 |
| CONTRIK 2159809 · TMA1232278 · design | an individual | 9 Electronics | Registered | 2024 |
| COMTRUE 2109059 · TMA1177769 | an individual | 9 Electronics | Registered | 2023 |
| COMITROL 1915938 · TMA1130100 | URSCHEL LABORATORIES, INC. | 7 Machines | Registered | 2022 |
| Controx 1780731 · TMA1037389 | Chemische Werke Kluthe GmbH | 1 Chemicals2 Paints3 Cosmetics | Registered | 2019 |
| COMETRON 1725114 · TMA938177 | Celestron Acquisition, LLC | 9 Electronics | Registered | 2016 |
| CENTRIX 1655268 · TMA933906 | Corning Optical Communications LLC | 9 Electronics20 Furniture | Registered | 2016 |
| 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 |
| CENTRIX 0702728 · TMA409605 | The Cricket Company | 8 Hand | Registered | 1993 |
| COMTRAC 0691910 · TMA439393 | STOBER Drives, Inc. | 7 Machines9 Electronics11 Lighting | Registered | 1995 |
| COMTRAD 0608836 · TMA359361 | COMTRAD STRATEGIC SOURCING INC. | 35 Advertising | Registered | 1989 |
| CONTROX 0550076 · TMA342688 | Probat-Werke von Gimborn Maschinenfabrik GmbH | 7 Machines | Registered | 1988 |
| COMITROL 0461559 · TMA261953 | URSCHEL LABORATORIES, INC. | 7 Machines | Registered | 1981 |
| CONTRAX 0365964 · TMA198836 | Signode International IP Holdings LLC | 6 Metal10 Medical12 Vehicles+3 | Registered | 1974 |
| CONTREX 0321636 · TMA171997 | an individual | 32 Beer | Registered | 1970 |
| CENTRIX 2284502 | Armis, Inc. | 9 Electronics42 Science | Pending | 2023 |
| CANATRUX 2142351 · design | Canadian Heavy Truck Solutions Inc. | 7 Machines9 Electronics | Pending | 2021 |
| CONTRINEX 1618878 · TMA910772 · design | Contrinex SA | 9 Electronics | Registered | 2015 |
| COMMUTAIR 0553229 · TMA326610 | CANADIAN AIRLINES INTERNATIONAL LTD. | 39 Transport | Registered | 1987 |