| ÖMEK Holding AB | Ödeshög | 0 tkr |
| Omilia Samtal Sweden AB | Rydaholm | 0 tkr |
| Om Livet Sverige AB | Uddevalla | 0 tkr |
| Omsorgsgruppen IN Holding AB | Norrköping | 0 tkr |
| OMT BuildTech AB | Norrköping | 0 tkr |
| OMT Kliniken Norrköping (Sjukgymnastik Rehab Friskvård) AB | Norrköping | 0 tkr |
| One Birria AB | Norrköping | 0 tkr |
| OneForOne AB | Forshaga | 0 tkr |
| Onestream AB | Åby | 0 tkr |
| Onestream Holding AB | Åby | 0 tkr |
| Onkel Sam AB | Norrköping | 0 tkr |
| Onlinebilar Norrköping AB | Göteborg | 0 tkr |
| Onscreen AB | Norrköping | 0 tkr |
| Onslip Holding AB | Linköping | 0 tkr |
| OnTheGo AB | Åtvidaberg | 0 tkr |
| OÖ Holding AB | Valdemarsvik | 0 tkr |
| OPAA1 AB | Motala | 0 tkr |
| OPC Amor AB | Fornåsa | 0 tkr |
| OPC Amor Holding AB | Fornåsa | 0 tkr |
| O. Pettersons Fastighets AB | Motala | 0 tkr |
| Ops Consiva AB | Boxholm | 0 tkr |
| Optensys Energianalys AB | Linköping | 0 tkr |
| OptiCal Holding AB | Västervik | 0 tkr |
| Optimala System i Skandinavien AB | Norrköping | 0 tkr |
| Optimal Holding i Nkpg AB | Åby | 0 tkr |
| Optimum Invest Sweden AB | Norrköping | 0 tkr |
| Optivium AB | Linköping | 0 tkr |
| Optoteknik Property Kolmården AB | Kolmården | 0 tkr |
| OpusLink AB | Vreta Kloster | 0 tkr |
| OPW Holding AB | Valdemarsvik | 0 tkr |
| Orange Turtle AB | Norrköping | 0 tkr |
| Örbäck Lantbruks Aktiebolag | Klockrike | 0 tkr |
| Oreli Holding AB | Åtvidaberg | 0 tkr |
| Öresund Finans AB | Helsingborg | 0 tkr |
| Orgma AB | Linköping | 0 tkr |
| ORI Fastighets AB | Linköping | 0 tkr |
| Origo Bygg AB | Norrköping | 0 tkr |
| Öringsfors Fastighets AB | Boxholm | 0 tkr |
| ORI Ocean Holding AB | Linköping | 0 tkr |
| Oriso AB | Linköping | 0 tkr |
| Orkado AB | Linköping | 0 tkr |
| Ortovento AB | Linköping | 0 tkr |
| Oscar Goldring AB | Linköping | 0 tkr |
| Oscar Höglund AB | Norrköping | 0 tkr |
| Oscarsson OnIce AB | Finspång | 0 tkr |
| OSEM Holding AB | Norrköping | 0 tkr |
| OsithoMed AB | Norrköping | 0 tkr |
| OSJO AB | Skänninge | 0 tkr |
| Oskar Fyhrman Förvaltning AB | Norrköping | 0 tkr |
| Oskar Svensson Förvaltning AB | Skänninge | 0 tkr |