| Kidbrooke Advisory AB | |
| KiddoKitchen AB | |
| Kiliaro | |
| Kind | Skåne |
| Kinnevik AB | Stockholm |
| Kisel Stockholm AB | Stockholm |
| Kiselkarbid i Stockholm AB | |
| Kista Science City AB | Stockholm |
| Kive | |
| Kive | |
| Kivra AB | Stockholm |
| Klara Consulting | |
| Klaria | |
| Klarna AB | Stockholm |
| Klevgrand | |
| KlickData AB | |
| Kliently AB | |
| Klimato | |
| Knapp AB | |
| Kneedly | |
| Knodd Vård AB | |
| KnowIT AB | Stockholm |
| Knowit AB | |
| Kodi Foundation | Gävleborg |
| Kodiak Hub | |
| Kodsnack | |
| Koenigsegg Automotive AB | |
| Kognic | |
| Kognity | |
| Kognity | |
| Kollektiva Jämförelser i Sverige AB | |
| Kolonien Coworking AB | |
| Kompanjoner.se | |
| Kompar | |
| Koneo AB | Stockholm |
| Konvoj AB | |
| Korridor AB | Stockholm |
| Krea Technology AB | |
| Kreafon | Västra Götaland |
| Kreditz | |
| Krinova | |
| Krinova Incubator & Science Park | |
| Kromnigon | |
| Kry International AB | |
| Kry International AB | |
| KTH - Institutionen för matematik | Stockholm |
| KTH - PDC Center for High Performance Computing | Stockholm |
| Kubikon AB | Stockholm |
| Kullander AB | Skåne |
| Kundo | |