| Stockholm Makerspace | |
| Stockholm School of Economics | |
| Stockholm School of Economics in Riga | |
| Stockholm School of Entrepreneurship | Stockholm |
| Stockholm/Sweden | Stockholm |
| Stockholms Universitet | Stockholm |
| Stockholms universitet - Matematiska institutionen | Stockholm |
| StockRepublic | |
| stoEr Technologies AB | |
| Stokab | Stockholm |
| StoreSprint AB | |
| Stormfors | |
| Storvix AB | |
| Storykit | |
| Storyspot | |
| Storytel Sweden AB | |
| Strålsäkerhetsmyndigheten | |
| Strategi Invest | |
| Stratipath AB | |
| Strativ | |
| Stratsys | |
| Stravito | |
| Strawbees AB | |
| Stream Analyze | |
| Streamcode Sweden AB | Västra Götaland |
| Streamify AB | |
| Strike Pharma | |
| Strikersoft AB | |
| Strivo AB | |
| Strossle | Stockholm |
| Strukturdata i Stockholm AB | Stockholm |
| StruSoft AB | |
| STTS – Södermalms talteknologiservice AB | Stockholm |
| StudyBee | |
| Stunlock Studios | Västra Götaland |
| SU Inkubator | Stockholm |
| Substly AB | |
| Sum Health AB | |
| SumedaTech | Västernorrland |
| Summera Support | Stockholm |
| Sun Labs Nordic AB | |
| SunRoof | |
| Sup46 | Stockholm |
| Surfboard Payments AB | |
| Surikat AB | Västra Götaland |
| SurveyLegend AB | |
| Sustain Change AB | |
| Sustainable Energy Solutions Sweden Holding AB | |
| SustainLab Sweden AB | |
| Sustera | |