| CTK 2243802 · TMA1261833 | CTK SYS Inc. | 9 Electronics37 Construction42 Science+1 | Registered | 2024 |
| CTS 1779875 · TMA1030554 · design | CTS Corporation, a corporation of Indiana | 9 Electronics12 Vehicles40 Treatment+1 | Registered | 2019 |
| CTAS 1759658 · TMA1005836 | CANADIAN ASSOCIATION OF EMERGENCY PHYSICIANS | 16 Paper35 Advertising41 Education+2 | Registered | 2018 |
| CTS 1723384 · TMA936110 | First American Financial Corporation | 36 Finance39 Transport45 Legal | Registered | 2016 |
| CTS 1551115 · TMA888219 | AVIXA Inc. | 35 Advertising37 Construction38 Telecommunications+2 | Registered | 2014 |
| CTS 1507175 · TMA866952 | CRS HOLDINGS, LLC | 6 Metal | Registered | 2013 |
| CTS 1405049 · TMA748577 | CON-TECH SYSTEMS LTD. | 6 Metal7 Machines | Registered | 2009 |
| CTS 1371348 · TMA734551 · design | 4364546 Canada Inc. | 9 Electronics13 Firearms | Registered | 2009 |
| CTS 1368343 · TMA781451 | CTS CORPORATION a legal entity | 9 Electronics11 Lighting35 Advertising+3 | Registered | 2010 |
| CTS 1270767 · TMA676113 · design | an individual | 35 Advertising38 Telecommunications41 Education | Registered | 2006 |
| CTS 1242844 · TMA656851 · design | an individual | 35 Advertising38 Telecommunications41 Education | Registered | 2006 |
| CTAS 1242216 · TMA656036 | Niterra Co. Ltd. | 9 Electronics | Registered | 2006 |
| CTOS 1223089 · TMA640575 | Owner not shown | 9 Electronics | Registered | 2005 |
| CTS 1054235 · TMA567038 | General Motors LLC | 12 Vehicles | Registered | 2002 |
| CTK 0717368 · TMA423079 | CASIO KEISANKI KABUSHIKI KAISHA, ALSO TRADING AS CASIO COMPUTER CO. LTD. A JAPANESE COMPANY | 15 Musical | Registered | 1994 |
| CTS 0689415 · TMA402460 | Canadian Thoracic Society | 35 Advertising36 Finance41 Education+1 | Registered | 1992 |
| CTS 0226001 · TMA100535 | CTS Corporation | 7 Machines8 Hand9 Electronics+1 | Registered | 1955 |
| CTS 2367589 | Owner not listed | 6 Metal | Pending | 2024 |
| CTS 2362710 · design | LES ENTREPRISES ALIMENTAIRES CTS INC. | 35 Advertising | Pending | 2024 |
| CTSS 2013832 | Canadian College of Health Information Management | 35 Advertising42 Science | Pending | 2020 |
| CTS 2013142 · design | Owner not shown | 35 Advertising36 Finance39 Transport+2 | Pending | 2020 |
| CTK 0970146 · design | Kazakhstan | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1997 |
| COTES 2231098 · TMA1253028 · design | Owner not shown | 11 Lighting40 Treatment | Registered | 2024 |
| Cotes 2231097 · TMA1253027 | Owner not shown | 11 Lighting40 Treatment | Registered | 2024 |
| CETES 1804810 · TMA1053110 | an individual | 3 Cosmetics21 Housewares | Registered | 2019 |