| Onsala Adventures AB | Onsala | 0 tkr |
| Onsala Consulting AB | Onsala | 0 tkr |
| Onsala De Me AB | Onsala | 0 tkr |
| Onsala Gårdar AB | Onsala | 0 tkr |
| Onsala Glas AB | Onsala | 0 tkr |
| Onsala Kyrkväg Holding AB | Onsala | 0 tkr |
| Onsalaporten Fastighetsaktiebolag | Kungsbacka | 0 tkr |
| Onsalaporten Holding AB | Kungsbacka | 0 tkr |
| Onsala Regalo AB | Onsala | 0 tkr |
| Onsala Technologies AB | Kungsbacka | 0 tkr |
| Onsjö Vy AB | Halmstad | 0 tkr |
| Ontef AB | Onsala | 0 tkr |
| Ontopgames AB | Göteborg | 0 tkr |
| Ontop Göteborg AB | Åsa | 0 tkr |
| Onwheels Group AB | Halmstad | 0 tkr |
| Onwheels Invest AB | Halmstad | 0 tkr |
| OnWheels Mobility AB | Halmstad | 0 tkr |
| Ooops Mobility AB | Kullavik | 0 tkr |
| OOPS ART AB | Kungsbacka | 0 tkr |
| Opera Omnia AB | Slöinge | 0 tkr |
| Öppinge Gräv Aktiebolag | Halmstad | 0 tkr |
| OptiCon AB | Halmstad | 0 tkr |
| OPTIKMAGASINET Halmstad AB | Kungsbacka | 0 tkr |
| OptimizedCC AB | Holm | 0 tkr |
| Optinda AB | Halmstad | 0 tkr |
| Optirem AB | Åsa | 0 tkr |
| Orbitiri AB | Simlångsdalen | 0 tkr |
| Orcus Partners AB | Halmstad | 0 tkr |
| Ordorigo IT Consulting AB | Varberg | 0 tkr |
| öresjö inwest AB | Vallda | 0 tkr |
| Organic Commerce Norden AB | Stocksund | 0 tkr |
| Orion försäkringsmäklare Aktiebolag | Halmstad | 0 tkr |
| Orior Förvaltning AB | Fjärås | 0 tkr |
| ÖrjaniBerg AB | Kinnared | 0 tkr |
| Ormavråen AB | Halmstad | 0 tkr |
| Ormen 46 AB | Falkenberg | 0 tkr |
| Ormestad Consulting AB | Varberg | 0 tkr |
| Orrelunds Buss AB | Fjärås | 0 tkr |
| Orrviken Invest Aktiebolag | Onsala | 0 tkr |
| Orserab AB | Fjärås | 0 tkr |
| Örtagårdsgatan Holding AB | Kungsbacka | 0 tkr |
| Örtboden i Halmstad Aktiebolag | Halmstad | 0 tkr |
| Örtendahl Invest AB | Veddige | 0 tkr |
| Örtendahl Ortodonti Aktiebolag | Kungälv | 0 tkr |
| Osaler AB | Tvååker | 0 tkr |
| Osalja AB | Varberg | 0 tkr |
| OscAnder Invest AB | Stockholm | 0 tkr |
| Oscar Tärnås AB | Gullbrandstorp | 0 tkr |
| Oscar Winge AB | Gullbrandstorp | 0 tkr |
| Oskar Knubbe Holding AB | Kullavik | 0 tkr |