- Maat Pharma
- Maco-Pharma
- Magis Farmaceutici SpA
- Majorelle
- Marinus Pharmaceuticals, lnc.
- Marlborough Pharmaceuticals Ltd
- Maruho Co Ltd
- Mayoly-Spindler
- Medac
- Medac SAS
- Mediam
- Medipha Santé
- Médipha Santé SAS
- Medisol
- Mediwin Ltd
- Medtronic BioPharma BV
- Melisana Pharma France
- Menarini France
- Merck Serono SAS
- MERCURY PHARMA GROUP
- Mercury Pharmaceuticals Ltd
- Merial
- Merus NV
- Merz Pharma France
- Messer France SAS
- Micropharm LTD
- Milpharma Ltd
- Miltenyi Biomedicine
- MIP Pharma GmbH
- Mirati Therapeutics
- Mirum Pharmaceuticals France
- Mission Pharmacal
- Mitem Pharma
- Mobius Therapeutics LLC
- MOC
- Moderna Biotech Spain, SL
- Molnlycke Health Care
- Morningside Healthcare Ltd
- MSD France
- MSD Vaccins
- MT PHARMA AMERICA
- Mundipharma
- Mundipharma Research Limited
- Mylan
- Mylan Medical SAS
- Mylan SAS