| STAARSOFT 1832875 · TMA1042745 · design | Tavares Group Consulting Inc. | 9 Electronics35 Advertising41 Education+1 | Registered | 2019 |
| STAARSOFT 1832849 · TMA1042751 | Tavares Group Consulting Inc. | 9 Electronics35 Advertising41 Education+1 | Registered | 2019 |
| STRUCT 1715663 · TMA957060 | MASCO CANADA LIMITED | 11 Lighting | Registered | 2016 |
| StressOFF 1694231 · TMA939876 | NuvoCare Health Sciences Inc. | 5 Pharmaceuticals | Registered | 2016 |
| STRUCKET 2177097 | Mango Street Holdings Pty Ltd | 11 Lighting21 Housewares35 Advertising | Pending | 2022 |
| STORKCRAFT 1895878 · TMA1081156 · design | Stork Craft Manufacturing Inc. | 20 Furniture24 Textiles28 Toys | Registered | 2020 |
| STORKCRAFT 1708937 · TMA963482 | Stork Craft Manufacturing Inc. | 20 Furniture21 Housewares24 Textiles+2 | Registered | 2017 |
| STORKCRAFT 2357014 · design | Owner not listed | 19 Building20 Furniture28 Toys+1 | Pending | 2024 |
| STORKCRAFT 2357013 · design | Owner not listed | 19 Building20 Furniture28 Toys+1 | Pending | 2024 |
| STROCS 2252280 · TMA1270230 | an individual | 25 Clothing | Registered | 2024 |
| STRUCK 1941081 · TMA1149533 | C.F. STRUCK CORP. | 7 Machines12 Vehicles | Registered | 2022 |
| STRUKSHUR 1842052 · TMA1092218 | Strukshur, Inc. | 35 Advertising37 Construction42 Science | Registered | 2021 |
| STRUCTUBE 1616404 · TMA896562 | STRUC-TUBE LTD STRUC-TUBE LTEE | 8 Hand9 Electronics11 Lighting+7 | Registered | 2015 |
| STRUCTURE 1516405 · TMA818252 · design | ZOTOS INTERNATIONAL, INC. | 3 Cosmetics | Registered | 2012 |
| STRUCTURA 1442903 · TMA778365 | Portes Standard Inc. | 6 Metal19 Building | Registered | 2010 |
| STRUCTURA 1435674 · TMA801354 | an individual | 33 Wine | Registered | 2011 |
| STRICT 1418064 · TMA757885 | iP Group Ltd. | 9 Electronics | Registered | 2010 |
| STRUCELL 1412157 · TMA781084 · design | CHANGZHOU TIANSHENG NEW MATERIALS CO. LTD. | 1 Chemicals16 Paper17 Rubber+1 | Registered | 2010 |
| STREST 1353430 · TMA742118 | St. Francis Herb Farm Incorporated | 5 Pharmaceuticals44 Medical | Registered | 2009 |
| STARCRAFT 1310330 · TMA697385 | Blizzard Entertainment, Inc. | 16 Paper25 Clothing41 Education | Registered | 2007 |
| STRUCTURA 1201849 · TMA691248 | Owner not shown | 30 Coffee | Registered | 2007 |
| STARCRAFT 0870402 · TMA535055 | Blizzard Entertainment, Inc. (a Delaware corporation) | 9 Electronics28 Toys | Registered | 2000 |
| STRUCTAL 0853027 · TMA513445 | Süddekor GmbH | 2 Paints16 Paper17 Rubber+1 | Registered | 1999 |
| STARCRAFT 0302050 · TMA159549 | Jayco, Inc. | 12 Vehicles35 Advertising | Registered | 1968 |
| STRUKTOL 0275805 · TMA133967 | Owner not shown | 1 Chemicals | Registered | 1963 |