| Company Name [asc] | Country |
|---|---|
| Onconova Europe GmbH | Germany |
| Oncopeptides AB | Sweden |
| Oncoral Pharma ApS | Denmark |
| Oncorena AB | Sweden |
| Oncoscience GmbH | Germany |
| Oncostellae S L | Spain |
| Oncurious NV | Belgium |
| Onkogen Kft. | Hungary |
| onkovis GmbH | Germany |
| OP Pharma S.r.L. | Italy |
| OP2 Drugs SAS | France |
| Op2Lysis | France |
| OPK Biotech Netherlands BV | Netherlands |
| OPTIMAL REGULATORY SOLUTIONS, S.L. | Spain |
| Opus Materia Ltd | Greece |
| Orchard Therapeutics Netherlands B.V. | Netherlands |
| Oresund Pharma ApS | Denmark |
| Orgenesis | Belgium |
| Orivas UAB | Lithuania |
| Orphalan | France |
| ORPHAZYME A/S | Denmark |
| ORPHELIA Pharma SA | France |
| Orphelion AB | Sweden |
| Orphix Consulting GmbH | Germany |
| ORYX GmbH & Co. KG | Germany |
| ORYZON GENOMICS SA | Spain |
| OSE Immunotherapeutics | France |
| OT4B | France |
| OvoVet Pharma SRL | Romania |
| Owkin France SAS | France |
| Oxcia AB | Sweden |
| Oxitope Pharma B.V. | Netherlands |
| Oxolife SL | Spain |
| Oxurion N.V. | Belgium |
| Oxyton Pharma GmbH | Germany |
| Oxytone Bioscience B.V. | Netherlands |
| Oy Verman Ab | Finland |
| Ozack ApS | Denmark |
| P.H. FARMACEUTICI SPA | Italy |
| P.T. Hadjigeorgiou & Co Ltd | Cyprus |
|
|
|