| STUDEX 0501984 · TMA285865 | STUDEX CORPORATION | 14 Jewellery | Registered | 1983 |
| STEDOX 2345189 · design | an individual | 6 Metal37 Construction | Pending | 2024 |
| STOTEX 1813479 · TMA1045442 | Sto SE & Co. KGaA, a Germany limited partnership | 2 Paints | Registered | 2019 |
| STATEX 1566823 · TMA852229 | JET Equipment & Tools Ltd./Equipement & Outillage Jet Ltee | 9 Electronics | Registered | 2013 |
| STATEX 0576741 · TMA344553 | BIRLA CARBON U.S.A. INC. | 1 Chemicals | Registered | 1988 |
| STATEX 0535956 · TMA308556 | PALADIN LABS INC. | 5 Pharmaceuticals | Registered | 1985 |
| STUDIOX 2120458 · TMA1208468 | Golf Town Limited | 41 Education | Registered | 2023 |
| STADECK 1882756 · TMA1079717 | an individual | 19 Building | Registered | 2020 |
| STUDTEK 1830590 · TMA1018691 | DCM Metal Corp. | 6 Metal | Registered | 2019 |
| STETECO 1825863 · TMA1026744 | FAST RETAILING CO. LTD. | 35 Advertising | Registered | 2019 |
| STETECO 1676389 · TMA967907 | as Corporation | 25 Clothing | Registered | 2017 |
| SITATEX 0894378 · TMA567715 | Owner not shown | 9 Electronics10 Medical16 Paper+2 | Registered | 2002 |
| STEADISET 1929326 · TMA1119347 | Tandem Diabetes Care, Inc. | 10 Medical | Registered | 2022 |
| STEADISET 1883362 · TMA1064712 | Bradford White-Canada, Inc. | 7 Machines11 Lighting | Registered | 2019 |
| STEDCOVER 0468261 · TMA270383 | Narcote Canada Corporation | 24 Textiles | Registered | 1982 |
| STUDDS 2139990 · TMA1229328 · design | STUDDS ACCESSORIES LIMITED | 9 Electronics | Registered | 2024 |
| STEDISCENT 1969252 · TMA1260378 | JULIUS SAMANN LTD. | 3 Cosmetics5 Pharmaceuticals | Registered | 2024 |
| SteadyStem 1923386 · TMA1131877 | CannTx Life Sciences Inc. | 31 Fresh35 Advertising37 Construction+3 | Registered | 2022 |
| STATIX 1877446 · TMA1085987 | L'Association régionale du sport étudiant de Québec et de Chaudière-Appalaches (A.R.S.E.Q.C.A.) inc. | 8 Hand12 Vehicles16 Paper+8 | Registered | 2020 |
| STEDISCENT 1615946 · TMA888433 | JULIUS SAMANN LTD. | 5 Pharmaceuticals | Registered | 2014 |
| SITEDOCS 1566994 · TMA895460 | SiteDocs Safety ULC | 9 Electronics42 Science45 Legal | Registered | 2015 |
| STEDICOR 0796326 · TMA493220 | Allergan Pharmaceuticals International Limited | 5 Pharmaceuticals | Registered | 1998 |
| STEDSHIELD 0722862 · TMA428632 | Narcote Canada Corporation | 7 Machines9 Electronics17 Rubber+3 | Registered | 1994 |
| STADIS 0359185 · TMA198363 | Innospec International Limited | 1 Chemicals | Registered | 1974 |
| STUDS 2360383 | Studs Inc. | 44 Medical | Pending | 2024 |