| Simply No Waste AB | |
| Simsen Diagnostics | |
| Simumatik AB | |
| Sinch | |
| Sinch | |
| Single Technologies AB | |
| Sinntaxis AB | |
| Sinom AB | |
| Sircular | |
| Sitevision | |
| Sitoo | Stockholm |
| Sivers Semiconductors AB | |
| Sixera Pharma | |
| Skåne Startups | Skåne |
| Skapa AB | |
| Skatteverket | |
| Skawen Technologies AB | |
| Skellefteå Business Lab AB | |
| SKF Linearsysteme GmbH | Västra Götaland |
| Skinfo | |
| Skira | |
| Skolon AB | |
| Skönborg Kapital AB | |
| Skrym AB | |
| Skyqraft | |
| Skyresponse AB | |
| SkySparc AB | |
| Slagkryssaren AB | Stockholm |
| Slipp AB | |
| Smart Agritech Solution | |
| Smart Eye | |
| Smart Eye | |
| Smart Recycling | |
| Smart Refill AB | |
| Smart Retur AB | |
| Smart Sensor Devices AB | |
| Smart Source AB | |
| Smarta Hemsidor | |
| SmartCella Holding AB | |
| Smarticle AB | |
| Smartify | |
| SmiLe Incubator | |
| Smode Webbyrå | |
| Smoltek Nanotech Holding AB | |
| Snapcode AB | |
| SnapGene | |
| Snow Software AB | Stockholm |
| Snowfire | |
| Snowfire AB | |
| Sociallite ME AB | |