| STROMM 2088543 · TMA1196479 · design | Stromm Industries Inc. | 7 Machines | Registered | 2023 |
| STROMAE 1741883 · TMA986886 · design | an individual | 9 Electronics16 Paper25 Clothing+4 | Registered | 2017 |
| STRONE 1934677 · TMA1143117 · design | Shenzhen Jiufangge Investment Consultation Co. Ltd. | 9 Electronics35 Advertising | Registered | 2022 |
| STROMAG 1930749 · TMA1146198 | Stromag GmbH, a legal entity | 7 Machines9 Electronics12 Vehicles | Registered | 2022 |
| STROMA 1791246 · TMA1023260 | Stroma Medical Corporation | 10 Medical | Registered | 2019 |
| 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 |
| STROMAG 1204781 · TMA652371 · design | Stromag GmbH | 7 Machines9 Electronics12 Vehicles | Registered | 2005 |
| STRONE 1092362 · TMA588501 | On Side Restoration Services (Ont.) Ltd. | 37 Construction | Registered | 2003 |
| STROMER 2361957 · design | Owner not shown | 9 Electronics12 Vehicles | Pending | 2024 |
| STRÖM 2286570 | an individual | 12 Vehicles | Pending | 2023 |
| STROHM 2120588 | an individual | 17 Rubber19 Building42 Science | Pending | 2020 |
| STROM !! 2038145 | LGI SOLUTIONS SANTÉ INC. LGI HEALTHCARE SOLUTIONS INC. | 9 Electronics35 Advertising42 Science | Pending | 2020 |
| STROMCORE 1809953 · TMA1011758 | Stromcore Energy Inc. | 9 Electronics37 Construction42 Science | Registered | 2018 |
| Stronger 1897564 · TMA1105876 | doTERRA Holdings, LLC | 3 Cosmetics | Registered | 2021 |
| STREAMER 1766372 · TMA1034942 · design | Daikin Industries, Ltd. | 11 Lighting | Registered | 2019 |
| STRONGER 1729745 · TMA944415 | an individual | 35 Advertising42 Science | Registered | 2016 |
| STREAMER 1651221 · TMA944077 | Otkrytoe aktsionernoe obshchestvo 'NPO Streamer' an open joint-stock company organized and existing under the laws of the Russian Federation | 6 Metal9 Electronics17 Rubber+2 | Registered | 2016 |
| STREAMER 1472740 · TMA927852 · design | Daikin Industries, Ltd. | 11 Lighting | Registered | 2016 |
| STYROMAX 0772198 · TMA456651 | Süd-Chemie Inc. | 1 Chemicals | Registered | 1996 |
| STROMBUS 0237933 · TMA106926 | an individual | 4 Oils | Registered | 1957 |
| Storieme 2323660 | Fuzhou Xuanlan Information Technology Co. Ltd. | 21 Housewares | Pending | 2024 |
| STROMADERM 1622571 · TMA881581 | Maple Mountain Group, Inc. | 3 Cosmetics | Registered | 2014 |
| STREAMTIME 1374408 · TMA760533 | STREAMTIME HOLDINGS LIMITED | 9 Electronics16 Paper35 Advertising+1 | Registered | 2010 |
| stream 2217850 · TMA1248321 · design | Summit Goal Food & Beverages Limited | 32 Beer | Registered | 2024 |