| Stemkey 1669726 · TMA924504 | an individual | 5 Pharmaceuticals | Registered | 2015 |
| STEAMIST 1487127 · TMA796390 | STEAMASTER CO. INC. | 11 Lighting | Registered | 2011 |
| StemSport 1459543 · TMA787894 | StemTech HealthSciences, Inc. | 5 Pharmaceuticals | Registered | 2011 |
| STEMSOFT 1407457 · TMA759108 | STEMCELL Technologies Canada Inc. | 9 Electronics41 Education42 Science | Registered | 2010 |
| STEAMIST 1160621 · TMA611760 · design | STEAMASTER CO. INC. (a New York Corporation) | 9 Electronics11 Lighting | Registered | 2004 |
| STEAMIES 1056903 · TMA559724 | LESTERS FOODS LIMITED / LES ALIMENTS LESTERS LIMITÉE | 29 Meat | Registered | 2002 |
| STEMSEP 0800717 · TMA506325 | STEMCELL Technologies Canada Inc. | 1 Chemicals7 Machines | Registered | 1999 |
| STONCREST 0662886 · TMA418066 | Owner not shown | 1 Chemicals2 Paints | Registered | 1993 |
| STEMCELL 1975316 | STEMCELL Technologies Canada Inc. | 1 Chemicals5 Pharmaceuticals9 Electronics+2 | Pending | 2019 |
| STIMSQUEEZE 2007194 · TMA1260663 | Italmatch Chemicals GB Limited | 1 Chemicals35 Advertising40 Treatment+1 | Registered | 2024 |
| 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 |
| STEMZYME 2199490 · TMA1223873 | The Oncor Corp. | 3 Cosmetics | Registered | 2024 |
| STAINSHIELD 2189783 · TMA1232849 | RUBBERMAID INCORPORATED | 9 Electronics21 Housewares | Registered | 2024 |
| STINGRAY 2185577 · TMA1231486 | an individual | 9 Electronics | Registered | 2024 |
| SHOTENGAI 2183371 · TMA1269789 · design | DIGGOODS HONGKONG LIMITED | 9 Electronics35 Advertising | Registered | 2024 |