| STUDIOLIVE 2164432 · TMA1219319 | Presonus Audio Electronics, Inc. | 9 Electronics | Registered | 2024 |
| STUDIOLINE 1123787 · TMA607081 | OSRAM GmbH | 11 Lighting | Registered | 2004 |
| STUDIOLUX 2075239 | STUDIOLUX TECHNOLOGY CORPORATION | 11 Lighting | Pending | 2021 |
| STUDIOLOGIC 1672463 · TMA987121 | an individual | 15 Musical | Registered | 2017 |
| STUDYLIFE 1403843 · TMA789851 | PEARSON EDUCATION, INC. | 45 Legal | Registered | 2011 |
| STODAL 0731178 · TMA435793 | Owner not shown | 5 Pharmaceuticals | Registered | 1994 |
| SteadyLAN 2019451 · TMA1146671 | Star Micronics Co. Ltd. | 9 Electronics | Registered | 2022 |
| SKIDADDLE 1871461 · TMA1102515 | Skip Hop, Inc. | 3 Cosmetics5 Pharmaceuticals8 Hand+13 | Registered | 2021 |
| STAEDTLER 1855161 · TMA1018666 · design | an individual | 16 Paper | Registered | 2019 |
| SEDATELEC 1736271 · TMA951375 | Owner not shown | 10 Medical35 Advertising | Registered | 2016 |
| STATHLETES 1735295 · TMA943626 | Stathletes Inc. | 9 Electronics41 Education42 Science | Registered | 2016 |
| STATOIL 1663801 · TMA965120 | an individual | 4 Oils35 Advertising37 Construction+3 | Registered | 2017 |
| SKEDADDLE!! 1552372 · TMA890998 | CROWHURST GAMES UNLIMITED INC. | 28 Toys | Registered | 2014 |
| studyladder 1476155 · TMA821477 | Study Ladder Holdings Pty Ltd. | 9 Electronics41 Education | Registered | 2012 |
| STATOIL 1438847 · TMA866801 · design | an individual | 4 Oils35 Advertising37 Construction+4 | Registered | 2013 |
| STEADYLINE 1428257 · TMA797245 | an individual | 7 Machines | Registered | 2011 |
| SEDITOL 1235606 · TMA667489 | Lonza Greenwood LLC | 5 Pharmaceuticals | Registered | 2006 |
| STATLINE 1067987 · TMA595679 | MUSCULOSKELETAL TRANSPLANT FOUNDATION, a non-profit corporation in the District of Columbia | 36 Finance37 Construction38 Telecommunications+1 | Registered | 2003 |
| SWEETITALY 1022463 · TMA538389 | an individual | 30 Coffee | Registered | 2000 |
| STATLOCK 0861735 · TMA531464 | C.R. Bard, Inc. | 10 Medical | Registered | 2000 |
| STATLINK 0715600 · TMA425045 | Heatlink Group Inc. | 9 Electronics37 Construction42 Science | Registered | 1994 |
| STAEDTLER 0464216 · TMA267971 | an individual | 3 Cosmetics9 Electronics16 Paper | Registered | 1982 |
| STADOL 0425365 · TMA237807 | BRISTOL-MYERS SQUIBB COMPANY | 5 Pharmaceuticals | Registered | 1979 |
| sidetalk 2355424 | Owner not listed | 9 Electronics35 Advertising38 Telecommunications+1 | Pending | 2024 |
| STUDELICIOUS 2317280 | STUDELICIOUS | 35 Advertising41 Education | Pending | 2024 |