| STEMCELEX 1333256 · TMA792840 | Island Laboratories Inc. | 3 Cosmetics5 Pharmaceuticals | Registered | 2011 |
| STENCILFLEX 2084810 | Eclairage Axis Inc. | 9 Electronics11 Lighting | Pending | 2021 |
| STIMSOLES 2141672 · TMA1250807 | BIOPODS, LLC | 10 Medical | Registered | 2024 |
| STEMSCOPES 2023660 · TMA1265052 | Accelerate Learning Inc. | 9 Electronics16 Paper41 Education | Registered | 2024 |
| STIMCARE 1989358 · TMA1264814 · design | an individual | 3 Cosmetics5 Pharmaceuticals10 Medical | Registered | 2024 |
| STEAMCORE 1947359 · TMA1219493 | 2801228 Ontario Inc. | 11 Lighting | Registered | 2024 |
| STENCIL 1804281 · TMA1025300 | Eclairage Axis Inc. | 11 Lighting | Registered | 2019 |
| Stencil1 1620862 · TMA888513 | Stencil1, Inc. | 2 Paints8 Hand9 Electronics+4 | Registered | 2014 |
| STENCIL 1451323 · TMA798399 | Prodigy Design Limited | 9 Electronics42 Science | Registered | 2011 |
| STEMCOR 1435345 · TMA824258 | Stemcor Holdings 2 Limited | 6 Metal36 Finance | Registered | 2012 |
| STEAMIES 1056903 · TMA559724 | LESTERS FOODS LIMITED / LES ALIMENTS LESTERS LIMITÉE | 29 Meat | Registered | 2002 |
| STEMCOL 0992001 · NFLD2001 | STANCO INCORPORATED (A DELAWARE CORPORATION) | 5 Pharmaceuticals | Registered | 1933 |
| STOMICS 2190866 · design | MGI Holdings Co., Limited | 1 Chemicals5 Pharmaceuticals9 Electronics+3 | Pending | 2022 |
| STEMCELL 1975316 | STEMCELL Technologies Canada Inc. | 1 Chemicals5 Pharmaceuticals9 Electronics+2 | Pending | 2019 |
| STENOGRAPH 2325260 · TMA1250370 · design | an individual | 9 Electronics16 Paper38 Telecommunications+2 | Registered | 2024 |
| SAOTANGTUI 2236523 · TMA1269889 · design | Owner not listed | 43 Restaurants | Registered | 2024 |
| STEAMCRISP 2236399 · TMA1256903 | SharkNinja Operating LLC | 11 Lighting | Registered | 2024 |
| SIUDANGKA 2232700 · TMA1256610 | an individual | 21 Housewares | Registered | 2024 |
| SITTINGSUITS 2226994 · TMA1243359 | an individual | 24 Textiles25 Clothing | Registered | 2024 |
| SATONAZAL 2225919 · TMA1250211 | Sato Pharmaceutical Co. Ltd. | 5 Pharmaceuticals | Registered | 2024 |
| SKATINGER 2223091 · TMA1272702 · design | Weihai Skatinger Outdoor Products Co. Ltd. | 28 Toys | Registered | 2024 |
| SWTYMIKI 2212820 · TMA1243173 | Changsha Yuanshangcao Technology Co.,Ltd. | 20 Furniture21 Housewares | Registered | 2024 |
| StangH 2201338 · TMA1210198 | Hangzhou Sitang Technology Co.Ltd | 20 Furniture24 Textiles27 Carpets | Registered | 2023 |
| STANGH 2201336 · TMA1210197 · design | Hangzhou Sitang Technology Co.Ltd | 20 Furniture24 Textiles27 Carpets | Registered | 2023 |
| STEMZYME 2199520 · TMA1223875 | The Oncor Corp. | 44 Medical | Registered | 2024 |