| SEROFINE 1583317 · TMA870588 | an individual | 10 Medical | Registered | 2014 |
| SERPENT 1682453 · TMA930497 | Owner not shown | 9 Electronics11 Lighting19 Building | Registered | 2016 |
| Serpent 1628520 · TMA901999 | New-Line Products, Ltd. | 17 Rubber | Registered | 2015 |
| SERVONE 1501663 · TMA817243 | CASCADES CANADA ULC | 16 Paper21 Housewares | Registered | 2012 |
| SERPENT 1386005 · TMA790537 | ARTHROCARE CORPORATION | 10 Medical | Registered | 2011 |
| SERPENT 0992451 · NFLD2451 | THE BELDAM PACKING & RUBBER CO. LIMITED | 2 Paints6 Metal17 Rubber+3 | Registered | 1941 |
| SEROPHENE 0522833 · TMA310275 | an individual | 5 Pharmaceuticals | Registered | 1986 |
| Surfbent 2066784 · TMA1215944 | an individual | 25 Clothing28 Toys | Registered | 2023 |
| SHURFINE 0657921 · TMA474034 · design | SHURFINE FOODS, INC. | 5 Pharmaceuticals16 Paper18 Leather+4 | Registered | 1997 |
| SEREVENT 0636937 · TMA438212 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 1995 |
| SURFFINE 0620452 · TMA430339 · design | Nippon Paint Surf Chemicals Co. Ltd. | 1 Chemicals | Registered | 1994 |
| Serfeymi 2347303 | Shenzhen Shengzexin Trading Co. Ltd. | 21 Housewares | Pending | 2024 |
| SERPENTINE 0898472 · TMA532669 | Auto-Bake PTY Limited | 7 Machines11 Lighting | Registered | 2000 |
| SERPENTINE 2059944 | TUTCO, LLC, a Pennsylvania limited liability company | 11 Lighting | Pending | 2020 |
| SURFING 1932749 · TMA1116838 | Weider Publications, LLC (a Delaware limited liability company) | 18 Leather26 Sewing | Registered | 2022 |
| SURFNET 1024027 · TMA565942 | TIO NETWORKS CORP. | 9 Electronics35 Advertising36 Finance+3 | Registered | 2002 |
| SURFAN 0458239 · TMA256086 | SANI-MARC INC. | 3 Cosmetics | Registered | 1981 |
| SurfIND 2347729 | an individual | 9 Electronics | Pending | 2024 |
| SARBEN 2281431 | Hangzhou Kaiyangui Technology Co. Ltd. | 20 Furniture | Pending | 2023 |
| Séraphine 1917423 · TMA1125252 | Seraphine Limited | 18 Leather24 Textiles25 Clothing+1 | Registered | 2022 |
| SERAPHINE 2301865 | Seraphine Limited | 3 Cosmetics4 Oils5 Pharmaceuticals+2 | Pending | 2023 |
| SHREEFINDEE 2258925 · TMA1277813 · design | Henan Yaobo Home Technology Co., Ltd. | 11 Lighting | Registered | 2024 |
| Surfinity 2135035 · TMA1197911 | Surfinity Products Corp. | 9 Electronics12 Vehicles18 Leather+4 | Registered | 2023 |
| SHERBON 2131311 · TMA1149495 · design | Super Asia Food & Spices LTD. | 30 Coffee31 Fresh32 Beer | Registered | 2022 |
| scarbomb 2081110 · TMA1168531 | an individual | 5 Pharmaceuticals | Registered | 2023 |