| Northvolt AB | |
| NorthX Biologics | |
| Nova Talent AB | |
| NovaCast | Blekinge |
| Novacura AB | |
| Novakand Pharma AB | |
| Novator Solutions AB | |
| Novatron Fusion Group AB | |
| Novedo Holding AB (publ) | |
| NoviOcean | |
| Novitell AB | Kalmar |
| Now Interact | |
| NOX Consulting AB | |
| Nrlyze AB | |
| Nstart AB | |
| NuLink | |
| Nuverica AB | |
| NuvoAir AB | |
| NXT2B | |
| Nytt IQ | |
| Nyttodata Väst AB | |
| Oawa | |
| Obducat AB | Skåne |
| Oblique Therapeutics AB (publ) | |
| Ocast AB | |
| Occtoo AB | |
| Ocean Harvesting Technologies AB | |
| Odd Hill AB | Skåne |
| Odd Studio AB | |
| OddGames | Västerbotten |
| Oderland | Västra Götaland |
| Odibo | Kalmar |
| Office Sverige AB | Stockholm |
| Offspring Biosciences AB | |
| OHB Sweden AB | |
| OhCleo AB | |
| OK-Q8 AB | |
| Olink | |
| Olioffice Fjorgyn distribution AB | Uppsala |
| Olivia | |
| Olofströms Kabel-TV AB | Blekinge |
| Omegapoint | Skåne |
| OMG Plant Based Food AB | |
| Omicron Ceti AB | Stockholm |
| Ommej | |
| Ommej AB | |
| Omnio | |
| On 1 Call Support AB | Stockholm |
| Onbaz AB | |
| Oncopeptides AB | |