| SEAHAWKS 0404022 · TMA249502 | Football Northwest LLC | 14 Jewellery16 Paper18 Leather+6 | Registered | 1980 |
| SKYHAWK 2077075 · TMA1278584 | Skyhawk Therapeutics, Inc. | 5 Pharmaceuticals42 Science | Registered | 2024 |
| SKYHAWK 1877713 · TMA1091420 | Skyhawk Therapeutics, Inc. | 5 Pharmaceuticals42 Science | Registered | 2021 |
| SKYHAWK 1814411 · TMA1124077 | Sandisk Technologies, Inc. | 9 Electronics | Registered | 2022 |
| SCHAWK!! 1773351 · TMA1017409 · design | Matthews International Corporation | 35 Advertising40 Treatment41 Education+1 | Registered | 2019 |
| SCHAWK 1767597 · TMA983643 | Matthews International Corporation | 35 Advertising40 Treatment41 Education+1 | Registered | 2017 |
| SKYHAWK 1425212 · TMA816301 | Steiner-Optik GmbH | 9 Electronics | Registered | 2012 |
| SKYHAWK 1041173 · TMA561427 | Citizen Tokei Kabushiki Kaisha also trading as Citizen Watch Co. Ltd. | 14 Jewellery | Registered | 2002 |
| SCHAWK 0893686 · TMA537819 | SGK LLC | 35 Advertising40 Treatment41 Education+1 | Registered | 2000 |
| SEAHOOK 0733863 · TMA514318 | Patrick Industries, Inc. | 6 Metal | Registered | 1999 |
| SEESAW 1884013 · TMA1084218 | Seesaw Learning, Inc. | 9 Electronics38 Telecommunications | Registered | 2020 |
| SeaWays 1822020 · TMA1041345 | Marine Canada Acquisition Inc. | 9 Electronics | Registered | 2019 |
| SQUAWK 1788375 · TMA996756 · design | Splice Software Incorporated | 9 Electronics | Registered | 2018 |
| SQUAWK 1788374 · TMA996755 | Splice Software Incorporated | 9 Electronics | Registered | 2018 |
| SQUAWK 1744815 · TMA1000388 | an individual | 28 Toys | Registered | 2018 |
| SEAWAX 1501198 · TMA837980 | an individual | 1 Chemicals2 Paints3 Cosmetics+3 | Registered | 2012 |
| SHACK 0428394 · TMA254917 | Global Franchising Corporation | 35 Advertising41 Education | Registered | 1981 |
| seaways 2323161 | Guangdong Seaways Biotechnology Co. Ltd. | 3 Cosmetics5 Pharmaceuticals | Pending | 2024 |
| shayk 2113766 | Shayk Technologies, Inc. | 9 Electronics42 Science | Pending | 2021 |
| SHASH 2303990 · TMA1234076 | Fozu Group LLC | 3 Cosmetics8 Hand18 Leather+1 | Registered | 2024 |
| Sayago 2263662 · TMA1284769 | Foshan Longjing e-commerce Co. Ltd. | 25 Clothing | Registered | 2025 |
| SAKI 2258811 · TMA1276526 | Saki Kitchen Inc. | 7 Machines11 Lighting | Registered | 2024 |
| Sawujw 2256212 · TMA1274722 | an individual | 14 Jewellery | Registered | 2024 |
| Swikey 2253262 · TMA1260235 | Shenzhen Langtu Technology Co. Ltd. | 3 Cosmetics | Registered | 2024 |
| SUYUKI 2251196 · TMA1279152 | an individual | 28 Toys | Registered | 2024 |