| CONVEX 2136853 · TMA1183153 · design | Convex Services Limited | 36 Finance | Registered | 2023 |
| CONVEX 1776757 · TMA980342 · design | Emco Corporation | 35 Advertising40 Treatment | Registered | 2017 |
| COMPEX 1074951 · TMA584684 | an individual | 3 Cosmetics9 Electronics | Registered | 2003 |
| CONVEX 0832897 · TMA484778 | MARTECH MARKETING LIMITED | 6 Metal9 Electronics12 Vehicles+1 | Registered | 1997 |
| COMPEX 0685735 · TMA404624 · design | Powermatic Data Systems Ltd. | 9 Electronics | Registered | 1992 |
| CONNVEX 1887417 · TMA1088181 · design | Complete Innovations Inc. | 42 Science | Registered | 2020 |
| CONNVEX 1887416 · TMA1088180 | Complete Innovations Inc. | 42 Science | Registered | 2020 |
| CONIFEX 1358657 · TMA755636 · design | CONIFEX TIMBER INC. | 4 Oils19 Building31 Fresh | Registered | 2009 |
| CONIFEX 1358580 · TMA755508 | CONIFEX TIMBER INC. | 4 Oils19 Building31 Fresh | Registered | 2009 |
| COINPAX 0870178 · TMA510737 | TRAVELEX FOREIGN COIN SERVICES LTD. | 36 Finance | Registered | 1999 |
| CONVÉS 2209934 · TMA1230650 | Owner not shown | 33 Wine | Registered | 2024 |
| COMPAX 1289100 · TMA700610 | Meri Environmental Solutions GmbH | 7 Machines | Registered | 2007 |
| COMPEQ 1149471 · TMA642506 · design | COMPEQ MANUFACTURING COMPANY LIMITED | 9 Electronics | Registered | 2005 |
| COMPX 1141548 · TMA604543 | CompX International Inc. | 6 Metal20 Furniture | Registered | 2004 |
| COMPAX 0736540 · TMA432896 | F.L. SMIDTH & CO. A/S | 7 Machines | Registered | 1994 |
| COMPAX 0520363 · TMA317649 | DIAMOND INNOVATIONS, INC. (a Delaware corporation) | 7 Machines | Registered | 1986 |
| COMPAX 2322052 | Universal Geneve SA | 14 Jewellery | Pending | 2023 |
| CONAPOXY 0484907 · TMA273487 | CYTEC TECHNOLOGY CORP. | 1 Chemicals | Registered | 1982 |
| CONFIXX 2215634 · TMA1233962 | an individual | 1 Chemicals | Registered | 2024 |
| CONFESS!!!! 2059954 · TMA1155232 | an individual | 25 Clothing | Registered | 2022 |
| CANAPUX 1823464 · TMA1072980 | Canadian National Railway Company | 4 Oils7 Machines37 Construction+2 | Registered | 2020 |
| CONEFIX 1629965 · TMA894108 | an individual | 21 Housewares | Registered | 2015 |
| CONVEGO 1435574 · TMA800003 | Giesecke+Devrient Mobile Security GmbH | 9 Electronics35 Advertising37 Construction+2 | Registered | 2011 |
| CONFESS 0556394 · TMA327658 | PARFUMS DE COEUR, LTD. | 3 Cosmetics | Registered | 1987 |
| Comfoex 2365353 | Zhuji Shengjia E-commerce Co. Ltd. | 25 Clothing | Pending | 2024 |