 | Sema GmbH. (DE) | Hall A 305J | |
 | Sempergreen BV (NL) | Hall A 312J | |
| Seven-Maxbau Kft. | Hall A 106I | |
 | Shanghai Sieyuan Watten Technology Co., Ltd. (CN) | Hall D D56 | |
 | Shangshui Smartech Ltd. (CN) | Hall D D18 | |
| Shenzhen Bosheng New Materials Co., Ltd. (CN) | Hall D D7 | |
 | Shenzhen Hans Lithium Battery Smart Equipment Co., Ltd. (CN) | Hall D D26 | |
 | Shenzhen Junxinda Co., Ltd. (CN) | Hall D D4 | |
 | Shenzhen Keijing Star Technology Co., Ltd. (CN) | Hall D D25 | |
 | Shenzhen KSTAR New Energy Co., Ltd (CN) | Hall D D65 | |
 | Shenzhen Longsheng Energy Technology Co., Ltd. (CN) | Hall D D15 | |
 | Shenzhen Omijia Intelligent Technology Co., Ltd. (CN) | Hall D D36 | |
 | Sillmaster | Hall A 305C | |
| Sincere Kft. | Hall G 604A | |
| Sittcsúszda Group Kft. | Hall A 104H | |
| Skinner Design Kft. | Hall G 501H | |
 | SMA Solar Technology AG (DE) | Hall D D41 | |
 | SMART-VENT Légtechnika Bt. | Hall A 313H | |
| Socowoo | Hall G 502B | |
| SÓKANDALLÓ Kft. | Hall G 401D | |
| Solar Kit Hungary Kft. | Hall D D52 | |
| Solar Welt Kft. | Hall A 102B | |
 | Solar&Solar Kft. | Hall D D51 | |
 | Solar-Napelem Kft. | Hall D D6 | |
| SolarLuna Kft. | Hall D D1 | |
 | Solenso Power SAS (CN) | Hall D D61 | |
 | Solis Technologies Co., Ltd (CN) | Hall D D12 | |
| Solymos-Design Kft. | Hall G 305F | |
| SOS-Gyermekfalu Magyarországi Alapítványa | Hall H 206D | |
 | Soudal Magyarország Kft. | Hall A 307C | |
| SPIKO-REX Kft. | Hall A 302B | |
| Splendid Design Kft. | Hall D D39 | |
| SSH-System Kft. | Hall A 310D | |
 | Stábparketta Kft. | Hall G 405F | |
| Stebo 5000 Kft. | Hall A 301C | |
 | Stiebel Eltron Kft. | Hall A 202H | |
| STROJEGRADNJA SAS, ARZENSEK STANKO S.P. (SI) | Hall A 108F | |
| Studio Present Kft. | Hall A 108I | |
 | Sunergy Solar Energy Co.,LTD. (CN) | Hall D D37 | |
 | SVEA HUNGARIA Kft. | Hall H 106C | |
| SW Umwelttechnik Magyarország Kft. | Hall A 207C | |
| Swiss Parkett Kft. | Hall G 305D | |
| Szalay Kft. | A szabad terület PSZ3 | |
| SZAUER Magyarország Belsőépítészeti Kft. | Hall G 304B1 | |
| SZETT Szőnyegtervezők Társasága Egyesület | Hall G 605A | |
 | Szil-Ker Ablak | Hall A 104F | |
 | Színfolt Kft. | Hall H 306A | |
 | SZJ Automation Co., Ltd. (CN) | Hall D D17 | |
| Szlovák Köztársaság Nagykövetsége | Hall G 405A | |
| T-Textil Kft. | Hall G 504C | |