| Olof Dahlinsgatans Intressenter AB | Helsingborg | 0 tkr |
| Olof Friman AB | Mörarp | 0 tkr |
| Olov Sterner Förvaltning AB | Helsingborg | 0 tkr |
| Olsheden Holding AB | Helsingborg | 0 tkr |
| OlsMediCon AB | Henån | 0 tkr |
| Olsson Rangbo AB | Helsingborg | 0 tkr |
| Olus Konsult AB | Helsingborg | 0 tkr |
| Omega coaching AB | Helsingborg | 0 tkr |
| ONBLUE Scandinavia AB | Påarp | 0 tkr |
| ONEEVENT Scandinavia AB | Helsingborg | 0 tkr |
| One Light Music AB | Helsingborg | 0 tkr |
| Oneyard Bygg och Fastigheter AB | Ekerö | 0 tkr |
| On Eyes Sweden AB | Helsingborg | 0 tkr |
| O Nilsson Holding AB | Helsingborg | 0 tkr |
| Onteo Solve AB | Helsingborg | 0 tkr |
| OPC Capital AB | Domsten | 0 tkr |
| OPC Partner AB | Domsten | 0 tkr |
| OPC Treasury AB | Domsten | 0 tkr |
| OP Ship Helsingborg AB | Helsingborg | 0 tkr |
| Opticap AB | Helsingborg | 0 tkr |
| OptiSense Care AB | Helsingborg | 0 tkr |
| Orbito Holding AB | Helsingborg | 0 tkr |
| Örestad Holding AB | Helsingborg | 0 tkr |
| Örestad Projekt AB | Helsingborg | 0 tkr |
| Öresund gruppen personal AB | Helsingborg | 0 tkr |
| Öresundsakuten AB | Helsingborg | 0 tkr |
| Öresunds mobila skrot- och antikhandel AB | Helsingborg | 0 tkr |
| Öresundteknik Holding AB | Malmö | 0 tkr |
| Örevall Consulting AB | Råå | 0 tkr |
| Orial Technologies AB | Helsingborg | 0 tkr |
| Orkesta-Mörby 3:20 AB | Södertälje | 0 tkr |
| Örlén Bygg AB | Helsingborg | 0 tkr |
| Örnahall Invest AB | Domsten | 0 tkr |
| Orsing Holding AB | Råå | 0 tkr |
| Oseal Träning AB | Helsingborg | 0 tkr |
| Oskar K Holding AB | Hässelby | 0 tkr |
| Oskar Natt och Dag Media Sales AB | Helsingborg | 0 tkr |
| Österns Pärla i Helsingborg Aktiebolag | Helsingborg | 0 tkr |
| Öster Project Development AB | Rydebäck | 0 tkr |
| Osthuset i Helsingborg Aktiebolag | Råå | 0 tkr |
| Östra Tornet Invest AB | Helsingborg | 0 tkr |
| OT ErgoBalance AB | Kristianstad | 0 tkr |
| Othea Bostadsaktiebolag | Eslöv | 0 tkr |
| Otiem Holding AB | Domsten | 0 tkr |
| Ove Pålsson Holding AB | Råå | 0 tkr |
| Ownex AB | Helsingborg | 0 tkr |
| Öxells i Helsingborg AB | Helsingborg | 0 tkr |
| Oziro AB | Helsingborg | 0 tkr |
| Paanit AB | Helsingborg | 0 tkr |
| Pac Group Europe AB | Råå | 0 tkr |