- O.C.P.
- O.S.I
- Oasis
- Obione
- Océopin
- OCLAM
- Διανομή OCP
- Odass Παρίσι
- Odost
- Odysud
- Oenobiol
- Officina Urban Therapy
- OGUST - SAS PAPPA
- Olbo
- OLFA | Santé
- Oligo Santé
- Olisma
- olla
- Omega Pharma France
- Omron Healthcare France
- Omron Santé France
- onagrine
- Oniris SAS
- = Opelle SAS
- Opella Healthcare France SAS
- Ophrys Medical
- Ophtalmic B & T
- OptimaBio
- Optimhal-Protecsom
- Optimiz
- Ordokiddy
- Organys SAS
- Γαλλία || 334
- Orion Corporation
- Orkyn
- Orliman Europe
- Ormendes SA
- Ornis - Ecuphar
- Orthonov
- Orthosoft
- Ortis
- Osalia
- Osato Europe
- Oscare
- Oscience
- Osilab || Έννοια
- OTC Concept
- OTC Medical
- OWS Ιατρική διάχυση
- Outremer
- Owen Mumford
- Oxypharm
- Oystershell
- Ozalys || 402
