| STRESS 0856676 · TMA521015 · design | ANN WELSH COMMUNICATIONS INC. | 35 Advertising36 Finance38 Telecommunications+2 | Registered | 2000 |
| STROCS 2252280 · TMA1270230 | an individual | 25 Clothing | Registered | 2024 |
| STORIES 2132571 · TMA1193850 | Facebook Technologies, LLC | 9 Electronics | Registered | 2023 |
| STORIES 2132565 · TMA1193848 | Facebook Technologies, LLC | 9 Electronics38 Telecommunications41 Education+1 | Registered | 2023 |
| STREAKS 2045456 · TMA1166558 | Crunchy Bagel Pty Ltd | 9 Electronics | Registered | 2023 |
| STRECK 1857505 · TMA1093540 · design | Streck LLC | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2021 |
| STRECK 1857504 · TMA1074515 · design | Streck LLC | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2020 |
| STREXER 1781053 · TMA985516 | an individual | 35 Advertising | Registered | 2017 |
| STROS 1599201 · TMA935821 · design | Owner not shown | 6 Metal7 Machines | Registered | 2016 |
| STROSS 1570856 · TMA864493 | STRUCTURES STROSS INC. | 19 Building35 Advertising | Registered | 2013 |
| SKYTREK 1535933 · TMA873430 | SKYTREK ADVENTURE PARK LTD | 9 Electronics16 Paper18 Leather+6 | Registered | 2014 |
| STRECK 1497646 · TMA835564 | Streck LLC | 1 Chemicals | Registered | 2012 |
| STREAK 1490004 · TMA816579 | Dell Inc. (a Delaware corporation) | 9 Electronics | Registered | 2012 |
| STREST 1353430 · TMA742118 | St. Francis Herb Farm Incorporated | 5 Pharmaceuticals44 Medical | Registered | 2009 |
| SATHERS 0667498 · TMA390991 | Ferrara Candy Company | 29 Meat30 Coffee | Registered | 1991 |
| STRASS 0528575 · TMA358471 · design | an individual | 11 Lighting | Registered | 1989 |
| STRASS 0396081 · TMA226063 | an individual | 11 Lighting | Registered | 1978 |
| STREGA 0258085 · TMA122224 | Owner not shown | 30 Coffee33 Wine | Registered | 1961 |
| STORIES 2304847 | Meta Platforms, Inc. | 9 Electronics | Pending | |
| STORIES 2304837 | Meta Platforms, Inc. | 9 Electronics38 Telecommunications41 Education+1 | Pending | |
| SITRAS 2227010 | an individual | 9 Electronics | Pending | 2022 |
| STOREYS 2098916 | Storeys Publishing Inc. | 16 Paper35 Advertising36 Finance+1 | Pending | 2021 |
| STROS 2031542 | an individual | 6 Metal7 Machines37 Construction | Pending | 2020 |
| STREAKERS 1990467 · TMA1151321 | IMCO Carbide Tool Inc. | 7 Machines | Registered | 2022 |
| SKYTRACKS 1776565 · TMA970467 | Gestion Mignault Inc. | 42 Science | Registered | 2017 |