| CANSORTIUM 1924881 · TMA1134449 | CAVERN CAPITAL HOLDING LLC | 1 Chemicals2 Paints3 Cosmetics+12 | Registered | 2022 |
| CONSORTIOME 2281234 | COST-BRY PTY LTD | 42 Science44 Medical | Pending | 2023 |
| Concordium 2273014 | Owner not listed | 9 Electronics16 Paper36 Finance+2 | Pending | 2022 |
| CONSORTIO 0924143 | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2016 |
| CONSORT 2101672 · TMA1222856 | an individual | 6 Metal | Registered | 2024 |
| CONSORTECH 1631401 · TMA954426 | Solutions Consortech inc. | 9 Electronics35 Advertising41 Education+1 | Registered | 2016 |
| CONSORCIO 1092848 · TMA658995 | an individual | 29 Meat | Registered | 2006 |
| CONSORTIAKIT 1044577 · TMA554152 | an individual | 35 Advertising38 Telecommunications42 Science+1 | Registered | 2001 |
| CONCERTIV 2034767 · TMA1162115 | Concertiv, Inc. | 35 Advertising | Registered | 2023 |
| CONCORDIX 1997234 · TMA1120826 | an individual | 5 Pharmaceuticals | Registered | 2022 |
| CONSARIO 1883725 · TMA1083093 | PFIZER INC. | 5 Pharmaceuticals | Registered | 2020 |
| CONSURIS 1873678 · TMA1091597 | Owner not shown | 1 Chemicals5 Pharmaceuticals | Registered | 2021 |
| CONCORDIA 1796251 · TMA1048694 · design | Concordia Pharmaceuticals, Inc. S.À.R.L. | 5 Pharmaceuticals10 Medical | Registered | 2019 |
| CONSERUS 1764318 · TMA967947 | Change Healthcare Technologies, LLC | 42 Science | Registered | 2017 |
| CONSERVIA 1706332 · TMA1032240 | Boston Scientific Scimed, Inc. | 10 Medical | Registered | 2019 |
| CONSERTEK 1592992 · TMA885568 | Groupe Consertek LM Inc. | 37 Construction | Registered | 2014 |
| CENSORIO 1581107 · TMA923669 | Chisa Holdings Ltd. | 6 Metal19 Building36 Finance+2 | Registered | 2015 |
| CONCORDIX 1475123 · TMA891440 | an individual | 5 Pharmaceuticals29 Meat | Registered | 2014 |
| CONCROBIUM 1267439 · TMA668352 | an individual | 5 Pharmaceuticals | Registered | 2006 |
| CONCORDIA 1074691 · TMA541453 | The Empire Life Insurance Company/L'Empire Compagnie d'Assurance-Vie | 36 Finance | Registered | 2001 |
| CONCERTIA 1062110 · TMA603913 | CONCERTIA TECHNOLOGIES INC. | 38 Telecommunications42 Science | Registered | 2004 |
| CONCORDIA 1002958 · TMA531739 · design | The Empire Life Insurance Company/L'Empire Compagnie d'Assurance-Vie | 36 Finance | Registered | 2000 |
| CONCORDIA 1002362 · TMA531727 | The Empire Life Insurance Company/L'Empire Compagnie d'Assurance-Vie | 36 Finance | Registered | 2000 |
| CONCORDIA 0621313 · TMA402482 | an individual | 4 Oils6 Metal9 Electronics+7 | Registered | 1992 |
| CONCERTINA 2372170 · design | an individual | 6 Metal19 Building | Pending | 2024 |