| STRASS 0528575 · TMA358471 · design | an individual | 11 Lighting | Registered | 1989 |
| STRASS 0396081 · TMA226063 | an individual | 11 Lighting | Registered | 1978 |
| STRASSER 2069897 · TMA1187159 · design | HMS Präzisionstechnik GmbH | 9 Electronics13 Firearms25 Clothing | Registered | 2023 |
| STRAWSTA 2323085 | an individual | 21 Housewares | Pending | 2024 |
| STRSSD 2100509 · TMA1173811 | an individual | 25 Clothing | Registered | 2023 |
| STRAGA 1743884 · TMA955792 · design | 8888108 Canada Ltd. | 3 Cosmetics4 Oils21 Housewares+2 | Registered | 2016 |
| STROSS 1570856 · TMA864493 | STRUCTURES STROSS INC. | 19 Building35 Advertising | Registered | 2013 |
| STRAUSS 1350629 · TMA764538 | Leviton Manufacturing Co. Inc. a corporation organized and existing under the laws of the State of Delaware | 9 Electronics | Registered | 2010 |
| STRAUSS 1347838 · TMA783868 · design | STRAUSS GROUP LTD. | 29 Meat30 Coffee31 Fresh | Registered | 2010 |
| STRESS 0856676 · TMA521015 · design | ANN WELSH COMMUNICATIONS INC. | 35 Advertising36 Finance38 Telecommunications+2 | Registered | 2000 |
| StressPal 1795953 · TMA1044135 | StressPal Inc. | 41 Education | Registered | 2019 |
| Staraise 2253420 · TMA1271552 | an individual | 28 Toys | Registered | 2024 |
| STRESSCO 1730113 · TMA956744 | STRESSCO INC. | 9 Electronics36 Finance42 Science | Registered | 2016 |
| STARESSO 1705851 · TMA965074 · design | SHENZHEN STARESSO CULTURE CO. LTD. | 7 Machines11 Lighting21 Housewares | Registered | 2017 |
| STARASID 0896455 · TMA533416 | Owner not shown | 5 Pharmaceuticals | Registered | 2000 |
| STERASYL 0222373 · UCA49224 | FAIREY INDUSTRIAL CERAMICS LIMITED | 1 Chemicals11 Lighting | Registered | 1953 |
| STRAWSIP 2373257 | Cirkul, Inc. | 21 Housewares | Pending | 2024 |
| STRESSVEDA 2039485 · TMA1141910 | FLORA MANUFACTURING AND DISTRIBUTING LTD. | 5 Pharmaceuticals | Registered | 2022 |
| STRESSGARD 1549300 · TMA983267 | Discovery Purchaser Corporation | 5 Pharmaceuticals | Registered | 2017 |
| STRESSCARE 1421188 · TMA811804 | Himalaya Global Holdings Ltd. | 5 Pharmaceuticals | Registered | 2011 |
| STRESSCHAT 1402749 · TMA756683 | Owner not shown | 35 Advertising44 Medical45 Legal | Registered | 2010 |
| STRESSTABS 0335912 · TMA180857 | PF Consumer Healthcare Canada ULC | 5 Pharmaceuticals | Registered | 1972 |
| STROCS 2252280 · TMA1270230 | an individual | 25 Clothing | Registered | 2024 |
| Starsea 2230391 · TMA1253014 | Shenzhen Hangmeng Technology Co. Ltd. | 11 Lighting | Registered | 2024 |
| STRAXAN 2097713 · TMA1209578 | Corteva Agriscience LLC | 5 Pharmaceuticals | Registered | 2023 |