| COMTRAX 1803072 · TMA1030546 | Comtrax Logistics Solutions Inc. | 35 Advertising39 Transport40 Treatment | Registered | 2019 |
| CONTREX 0321636 · TMA171997 | an individual | 32 Beer | Registered | 1970 |
| COMATRIX 1135945 · TMA604343 | SpinTek Filtration, Inc. | 9 Electronics11 Lighting | Registered | 2004 |
| COMTRUE 2109059 · TMA1177769 | an individual | 9 Electronics | Registered | 2023 |
| Controx 1780731 · TMA1037389 | Chemische Werke Kluthe GmbH | 1 Chemicals2 Paints3 Cosmetics | Registered | 2019 |
| COMTRAC 1622897 · TMA944601 | an individual | 7 Machines9 Electronics37 Construction+1 | Registered | 2016 |
| CENTREX 1510894 · TMA829666 | Centrex, LLC | 20 Furniture21 Housewares40 Treatment | Registered | 2012 |
| COMTRAD 1349303 · TMA725175 · design | COMTRAD STRATEGIC SOURCING INC. | 35 Advertising39 Transport | Registered | 2008 |
| CANTREX 1307882 · TMA694120 · design | CANTREX NATIONWIDE GROUP INC. / GROUPE CANTREX NATIONWIDE INC. | 35 Advertising | Registered | 2007 |
| CENTREX 0720115 · TMA453675 | SUN-MAR CORP. | 1 Chemicals11 Lighting | Registered | 1996 |
| COMTRAC 0703141 · TMA436756 | Huesker Synthetic GmbH | 6 Metal17 Rubber19 Building+2 | Registered | 1994 |
| CENTREX 0701037 · TMA409907 | INEOS ABS (USA) LLC | 1 Chemicals | 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 |
| CONTRAX 0365964 · TMA198836 | Signode International IP Holdings LLC | 6 Metal10 Medical12 Vehicles+3 | Registered | 1974 |
| CONTRINEX 1618878 · TMA910772 · design | Contrinex SA | 9 Electronics | Registered | 2015 |
| CONTROLEX 1526419 · TMA854782 | JAMP PHARMA CORPORATION | 5 Pharmaceuticals9 Electronics16 Paper | Registered | 2013 |
| CONTRINEX 2273344 | Owner not listed | 9 Electronics | Pending | 2023 |
| 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 |
| COMETRIQ 1596821 · TMA917450 | Exelixis, Inc. | 5 Pharmaceuticals | Registered | 2015 |
| CHEMTREC 1452458 · TMA816850 | American Chemistry Council, Inc. | 37 Construction39 Transport40 Treatment+1 | Registered | 2012 |
| CEMATRIX 1018353 · TMA540978 | Cematrix (Canada) Inc. | 1 Chemicals7 Machines19 Building+6 | Registered | 2001 |