- A. Menarini
- A.N.B.
- AB-Biotics
- Abbott
- Abbvie
- Abio
- Acino Switzerland
- Advance Pharma
- Aeva
- AFT Pharma
- AJ Research & Pharma
- Alcon
- AlfaSigma
- Amgen
- Anfarm Hellas
- Antah Pharma
- Apex
- Apex Lab
- AQurate Ingredients
- Aspen
- Aspen Sarl
- Astellas Pharma
- AstraZeneca
- Atnahs Pharma
- Aurobindo Pharma
- Averroes Pharma
- Avex
- Avo