| Stimplex 2169518 | Acadian Seaplants Limited | 1 Chemicals | Pending | 2022 |
| STONFLEX 0662885 · TMA396635 | Owner not shown | 17 Rubber | Registered | 1992 |
| StainBlock 1427419 · TMA764638 | PPG Architectural Coatings Canada, Inc./PPG Revêtements architecturaux Canada, inc. | 2 Paints | Registered | 2010 |
| STAINPROTECT 2103155 | BISSELL Inc. | 3 Cosmetics | Pending | 2021 |
| Stanpetix 2160816 · TMA1218516 | Jinhua Shunwei Network Tech Co. Ltd | 25 Clothing | Registered | 2024 |
| STONPLUS 1940862 · TMA1141747 | Owner not shown | 1 Chemicals19 Building | Registered | 2022 |
| STOMAFLEX 1582784 · TMA950909 | T.G. Eakin Limited | 5 Pharmaceuticals10 Medical | Registered | 2016 |
| STOMPLE 1479200 · TMA813805 | Spin Master Ltd. | 28 Toys | Registered | 2011 |
| STANPRO 0803021 · TMA476903 | STANDARD PRODUCTS INC. / PRODUITS STANDARD INC. | 9 Electronics11 Lighting | Registered | 1997 |
| STANPAC 0746776 · TMA459275 | Stanpac USA LLC | 20 Furniture21 Housewares28 Toys | Registered | 1996 |
| STOMAFLEX 0553195 · TMA329018 | T.G. Eakin Limited | 5 Pharmaceuticals | Registered | 1987 |
| STANPAC 0430198 · TMA243553 | Stanpac USA LLC | 1 Chemicals7 Machines17 Rubber | Registered | 1980 |
| STEAMPLE 2244246 | JUNGINTECHWIN Co. Ltd. | 7 Machines11 Lighting | Pending | 2023 |
| STAMPED 2223448 | LES TECHNOLOGIES STAMPED INC. | 9 Electronics35 Advertising42 Science | Pending | 2022 |
| STAMPED 2138747 | Stamped Operations Ltd. | 9 Electronics35 Advertising42 Science | Pending | 2021 |
| STANPRO 2028587 · design | LES PRODUITS STANDARD INC./STANDARD PRODUCTS INC. | 9 Electronics11 Lighting12 Vehicles+6 | Pending | 2020 |
| STAINBUSTER 1210997 · TMA641589 | ABRASIVE TECHNOLOGY FRANCE LLC | 10 Medical | Registered | 2005 |
| Stumped 2205791 · TMA1241374 | an individual | 16 Paper25 Clothing35 Advertising | Registered | 2024 |
| Stanhope 2183618 · TMA1257812 | 1879 Brand Ventures Ltd | 33 Wine | Registered | 2024 |
| STOMP 2170991 · TMA1222295 | H&H Sports Protection USA Inc. | 9 Electronics25 Clothing | Registered | 2024 |
| stunfassoo 2150672 · TMA1207537 | an individual | 14 Jewellery | Registered | 2023 |
| STEMVIVO 2111608 · TMA1227799 | STEMVIVO, INC. | 1 Chemicals5 Pharmaceuticals42 Science | Registered | 2024 |
| STUMPY 2101038 · TMA1240892 | an individual | 20 Furniture35 Advertising | Registered | 2024 |
| STONEBAKED 2091552 · TMA1186128 · design | 2441674 Ontario Inc. | 30 Coffee | Registered | 2023 |
| STONEBAKE 2091549 · TMA1186127 · design | 2441674 Ontario Inc. | 30 Coffee | Registered | 2023 |