| SecuriTek 2316432 | Servitek FOUSSIER Inc. | 6 Metal20 Furniture | Pending | 2024 |
| SECURITEX 0606950 · TMA358599 | SPERIAN PROTECTIVE APPAREL LTD. / SPERIAN VÊTEMENTS DE PROTECTION LTÉE | 9 Electronics35 Advertising40 Treatment | Registered | 1989 |
| SECURETE 0545141 · TMA315376 | Association d'Hospitalisation Canassurance | 36 Finance | Registered | 1986 |
| SECURITECH 1951881 · TMA1131340 | Owner not shown | 9 Electronics35 Advertising37 Construction+2 | Registered | 2022 |
| SECURITREE 1098926 · TMA571996 | AMENAZA TECHNOLOGIES LIMITED | 9 Electronics16 Paper41 Education+1 | Registered | 2002 |
| SECURITREE 1098925 · TMA571995 · design | AMENAZA TECHNOLOGIES LIMITED | 9 Electronics16 Paper41 Education+1 | Registered | 2002 |
| SECURITAS 1613553 · TMA930016 · design | an individual | 5 Pharmaceuticals6 Metal9 Electronics+11 | Registered | 2016 |
| SECURITAS 1277584 · TMA714845 | an individual | 6 Metal9 Electronics35 Advertising+6 | Registered | 2008 |
| SECURITAS 0590770 · TMA350637 · design | an individual | 9 Electronics35 Advertising41 Education+2 | Registered | 1989 |
| SECURITAS 2318066 | Owner not listed | 9 Electronics10 Medical35 Advertising+2 | Pending | 2023 |
| SECURITAS 2312740 · design | an individual | 6 Metal9 Electronics10 Medical+7 | Pending | 2023 |
| SECURITAS 2119158 | an individual | 9 Electronics38 Telecommunications42 Science+1 | Pending | 2020 |
| SECURITAS 0922031 | Canadian Transportation Accident Investigation and Safety Board | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2013 |
| SECURITAS 0902851 · design | DEPARTMENT OF NATIONAL DEFENCE | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1986 |
| SECURITAS 0902737 · design | DEPARTMENT OF NATIONAL DEFENCE | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1986 |
| SECURITYNET 1501065 · TMA835660 | Securitynet Communications Ltd. | 7 Machines9 Electronics12 Vehicles+6 | Registered | 2012 |
| SECURID 2153673 · TMA1221356 · design | RSA Security LLC (a Delaware limited liability company) | 9 Electronics42 Science | Registered | 2024 |
| Secret 1855893 · TMA1048809 | MARKER DALBELLO VÖLKL (INTERNATIONAL) GmbH | 28 Toys | Registered | 2019 |
| SECURITY 1851284 · TMA1021720 | HOUGHTON CHEMICAL CORPORATION | 1 Chemicals3 Cosmetics | Registered | 2019 |
| SECUREIT 1707793 · TMA944136 · design | It Luggage Limited | 18 Leather | Registered | 2016 |
| SECRET 1625224 · TMA894459 · design | The Procter & Gamble Company | 3 Cosmetics | Registered | 2015 |
| SECURITY+ 1422366 · TMA812001 | THE COMPUTING TECHNOLOGY INDUSTRY ASSOCIATION, INC. | 35 Advertising42 Science | Registered | 2011 |
| SECRET 1236365 · TMA650949 | TAFISA CANADA INC. | 19 Building | Registered | 2005 |
| SECRET 1235080 · TMA660384 | The Procter & Gamble Company | 3 Cosmetics | Registered | 2006 |
| SECURITY 1195054 · TMA625398 | Kimberly-Clark Worldwide, Inc. | 5 Pharmaceuticals | Registered | 2004 |