| STRAINPRINT 1841389 · TMA1042282 | Strainprint Technologies Ltd. | 9 Electronics42 Science | Registered | 2019 |
| STRAINLABS 2208256 · design | an individual | 6 Metal9 Electronics42 Science | Pending | 2022 |
| STRAINPOINTS 1841391 · TMA1015622 | Strainprint Technologies Ltd. | 35 Advertising | Registered | 2019 |
| STRINGIT 1979225 · TMA1245908 | Probst Inc. a Delaware corporation | 20 Furniture | Registered | 2024 |
| STRONGMAN 1923331 · TMA1126107 | Coulter Ventures, LLC | 28 Toys | Registered | 2022 |
| STRAMUCIN 1860029 · TMA1022098 · design | Glenmark Pharmaceuticals Canada Inc. | 5 Pharmaceuticals | Registered | 2019 |
| STRAMUCIN 1860006 · TMA1022096 | Glenmark Pharmaceuticals Canada Inc. | 5 Pharmaceuticals | Registered | 2019 |
| STRAINSEEK 1790904 · TMA978874 | Medicinal Genomics Corporation | 42 Science | Registered | 2017 |
| STRENGTHIN 1637848 · TMA976678 | Nutrien Ag Solutions (Canada) Inc. | 5 Pharmaceuticals | Registered | 2017 |
| SEADRAIN 1586589 · TMA886859 | Georg Fischer LLC | 19 Building | Registered | 2014 |
| STRONGMAN 1542075 · TMA883302 | Fusion Nutrition Inc. | 5 Pharmaceuticals | Registered | 2014 |
| STRIONAIR 1314569 · TMA748285 | StrionAir, Inc. | 11 Lighting | Registered | 2009 |
| Straumann 1245251 · TMA708483 | an individual | 1 Chemicals5 Pharmaceuticals10 Medical+4 | Registered | 2008 |
| STRAUMANN 1174801 · TMA630457 | an individual | 10 Medical41 Education42 Science+1 | Registered | 2005 |
| STRAHMAN 1085478 · TMA577471 · design | Strahman Valves, Inc. a Pennsylvania corporation | 9 Electronics11 Lighting | Registered | 2003 |
| SITRAIN 1066351 · TMA573470 | an individual | 9 Electronics16 Paper38 Telecommunications+2 | Registered | 2003 |
| STRAUMANN 0739205 · TMA450565 · design | an individual | 6 Metal10 Medical14 Jewellery | Registered | 1995 |
| STRANTROL 0717829 · TMA431056 | Evoqua Water Technologies LLC | 9 Electronics11 Lighting | Registered | 1994 |
| STRAINEX 2359715 | WIREMAN PTY LIMITED | 8 Hand | Pending | 2024 |
| STRANDCHIC 2344755 · design | Owner not listed | 16 Paper26 Sewing | Pending | 2024 |
| STRINGAM 2326441 | Owner not listed | 45 Legal | Pending | 2024 |
| strandhaus 2305444 | Owner not shown | 35 Advertising | Pending | 2024 |
| STARWIN 2225596 · design | an individual | 9 Electronics18 Leather25 Clothing | Pending | 2022 |
| STRAHMAN 2043425 | STRAHMAN VALVES, INC. | 6 Metal9 Electronics11 Lighting+2 | Pending | 2020 |
| STRONGSIZE 2309798 · TMA1258594 · design | Como Diffusion Inc. | 25 Clothing | Registered | 2024 |