- Oceanside Pharmaceuticals
- Octapharma Γαλλία
- Ohre Pharma
- Olympe Pharma
- OM Pharma S.A.
- Omega Pharma France
- Omrix Biophermaceuticals
- Opella Healthcare France SAS
- Orchard Therapeutics Ολλανδία bv
- Organon France
- Organon SA
- Biosciences Origin
- Orion Corporation
- Orion Pharma
- Orpha Devel Handels Vertries GmbH
- Orphalan SAS
- Ορφανή Ευρώπη
- Orphelia Pharma SAS
- ose Immunotherapeutics
- Otsuka Φαρμακευτική Γαλλία SAS