| STROMAG 1930749 · TMA1146198 | Stromag GmbH, a legal entity | 7 Machines9 Electronics12 Vehicles | Registered | 2022 |
| STROMAE 1741883 · TMA986886 · design | an individual | 9 Electronics16 Paper25 Clothing+4 | Registered | 2017 |
| STROMAG 1204781 · TMA652371 · design | Stromag GmbH | 7 Machines9 Electronics12 Vehicles | Registered | 2005 |
| STROMM 2088543 · TMA1196479 · design | Stromm Industries Inc. | 7 Machines | Registered | 2023 |
| STRÖM 2286570 | an individual | 12 Vehicles | Pending | 2023 |
| STROM !! 2038145 | LGI SOLUTIONS SANTÉ INC. LGI HEALTHCARE SOLUTIONS INC. | 9 Electronics35 Advertising42 Science | Pending | 2020 |
| STYROMAX 0772198 · TMA456651 | Süd-Chemie Inc. | 1 Chemicals | Registered | 1996 |
| STROMBO 1615148 · TMA950452 | SON HOUSE PRODUCTIONS INC. | 25 Clothing35 Advertising38 Telecommunications+6 | Registered | 2016 |
| STROMER 1548841 · TMA936780 | Owner not shown | 12 Vehicles25 Clothing | Registered | 2016 |
| STROMER 2361957 · design | Owner not shown | 9 Electronics12 Vehicles | Pending | 2024 |
| STROMME 2303498 | an individual | 1 Chemicals2 Paints3 Cosmetics+2 | Pending | 2023 |
| STRONG 2139149 · TMA1199053 · design | an individual | 25 Clothing | Registered | 2023 |
| STRM 2110906 · TMA1192667 | Novalis Holdings Limited, (a corporation of Hong Kong) | 27 Carpets | Registered | 2023 |
| STRONE 1934677 · TMA1143117 · design | Shenzhen Jiufangge Investment Consultation Co. Ltd. | 9 Electronics35 Advertising | Registered | 2022 |
| STRONGMAN 1923331 · TMA1126107 | Coulter Ventures, LLC | 28 Toys | Registered | 2022 |
| STRUM 1720893 · TMA993778 | Skullcandy, Inc. | 9 Electronics | Registered | 2018 |
| STRONGMAN 1542075 · TMA883302 | Fusion Nutrition Inc. | 5 Pharmaceuticals | Registered | 2014 |
| STROMASYS 1395358 · TMA788487 · design | Stromasys SA | 9 Electronics42 Science | Registered | 2011 |
| STRONE 1092362 · TMA588501 | On Side Restoration Services (Ont.) Ltd. | 37 Construction | Registered | 2003 |
| STRONG 1070312 · TMA589139 | an individual | 9 Electronics | Registered | 2003 |
| STREM 2192582 | Strem Chemicals, Incorporated | 1 Chemicals9 Electronics35 Advertising | Pending | 2022 |
| STROHM 2120588 | an individual | 17 Rubber19 Building42 Science | Pending | 2020 |
| STREAMAX 1919754 · TMA1109512 · design | STREAMAX TECHNOLOGY CO. LTD | 9 Electronics35 Advertising42 Science | Registered | 2021 |
| STERIMAX 1767163 · TMA1022370 · design | STERIMAX INC. | 5 Pharmaceuticals35 Advertising | Registered | 2019 |
| STREAMAX 1258736 · TMA741458 | The Chemours Company FC, LLC | 35 Advertising37 Construction | Registered | 2009 |