| SOUNDCORE 1878467 · TMA1082791 | ANKER INNOVATIONS LIMITED, a limited company organized and existing under the laws of Hong Kong | 9 Electronics | Registered | 2020 |
| SOUNDCORE 1828443 · TMA1004699 | an individual | 9 Electronics10 Medical | Registered | 2018 |
| SOUNDSENTRY 1781835 · TMA972822 | THERMOSTOP INC. | 6 Metal17 Rubber | Registered | 2017 |
| SOUNDSENTRY 1443795 · TMA828042 | WESTERN OILFIELDS SUPPLY COMPANY | 17 Rubber19 Building | Registered | 2012 |
| SOUNDcrete 2052468 · TMA1150541 | MSL | 17 Rubber19 Building | Registered | 2022 |
| SOUNDSOUL 1970319 · TMA1228643 | SHENZHEN SOUNDSOUL INFORMATION TECHNOLOGY CO. LTD | 9 Electronics | Registered | 2024 |
| SOUNDXTRA 1925540 · TMA1208037 · design | Exertis (UK) Ltd. | 6 Metal9 Electronics20 Furniture+1 | Registered | 2023 |
| SOUNDXTRA 1925538 · TMA1208036 | Exertis (UK) Ltd. | 6 Metal9 Electronics20 Furniture+1 | Registered | 2023 |
| SoundStrap 1797583 · TMA999959 | Soundtrap, Inc. | 17 Rubber | Registered | 2018 |
| SoundCare 1536772 · TMA871334 | an individual | 9 Electronics10 Medical35 Advertising+4 | Registered | 2014 |
| SOUNDSTOP 1176146 · TMA642280 | Blue Ridge Fiberboard, Inc. | 19 Building | Registered | 2005 |
| SOUNDSTATION 0749802 · TMA464873 | Plantronics, Inc. | 9 Electronics | Registered | 1996 |
| SUNDSTRÖM 0423841 · TMA242016 · design | an individual | 9 Electronics | Registered | 1980 |
| SOUNDCELL 2289136 | Specsavers Optical Superstores Limited | 9 Electronics10 Medical44 Medical | Pending | 2023 |
| SoundComply 2262964 | Patching Associates Acoustical Engineering Ltd | 42 Science | Pending | 2023 |
| SOUNDX 2284034 · TMA1224690 | Spartech LLC | 17 Rubber | Registered | 2024 |
| sindax 2263093 · TMA1281456 | Sindax Electronics Co. Ltd. | 21 Housewares | Registered | 2025 |
| SYNTHOSOL 2257318 · TMA1273184 | Synthomer (UK) Limited | 17 Rubber | Registered | 2024 |
| sinotouch 2250771 · TMA1268887 | Owner not listed | 6 Metal7 Machines | Registered | 2024 |
| SCINTIX 2250312 · TMA1267442 | Reflexion Medical, Inc. | 9 Electronics10 Medical44 Medical | Registered | 2024 |
| sinotouch 2246771 · TMA1265849 | Owner not listed | 10 Medical | Registered | 2024 |
| SANTCO 2241645 · TMA1241947 | Owner not listed | 37 Construction42 Science | Registered | 2024 |
| sandycoat 2232301 · TMA1254031 | Owner not shown | 1 Chemicals2 Paints19 Building | Registered | 2024 |
| SOUNDSCAPE 2226252 · TMA1209079 | TEMPUR WORLD, LLC | 20 Furniture | Registered | 2023 |
| SoundWise 2223546 · TMA1248847 | an individual | 35 Advertising | Registered | 2024 |