- A. Menarini
- AA Pharma
- AAA Pharma
- Abbott
- Abbvie
- Accord Healthcare
- Ace
- ACME
- Actavis Italy S.p.A
- Actimed
- AD-Drugstel
- ADP Pharma
- Aesculapius Farmaceutici
- Aesica Queensborough
- Affy Parenterals
- AGB Pharma
- Agio
- AGlobal Care
- AHCC Nutrients
- Ahlcon Parenterals
- Ahn-Gook Pharma
- Aim High
- Aisec Farma
- Ajanta Pharma Phil
- Ajinomoto
- Aju Pharm
- Akums Drug
- Alberta's Pride
- Alcon
- Aldo-Union
- Aldril
- Alfa Wassermann
- ALFASIGMA
- Alkem Lab
- All Medica
- All-Bio Pharma
- Altomed Pharma
- Alvita Pharma
- Alwin DMD
- Amanta Healthcare
- Ambica
- Ambicare
- Amdipharm Ltd
- Ameda Pharma
- American Taiwan Biopharma
- Am-Europharma
- Amgen
- Amherst Lab
- Amherst Parenterals
- Amino Up Chemical
- Anfarm Hellas
- Anhui Province Shuangke
- Anlit
- Antila Lifesciences
- AOP Orphan
- Apipharma
- Apogee Lab
- Apolloplus Capital
- Apoorv International
- Apotex
- Applied Pharma
- Aprogen
- Ashford Pharma
- Asian Antibiotics
- Asoj
- Aspen
- Astellas
- AstraZeneca
- Athena
- Atlanta Biological
- Atlantic Lab
- Atlantic Pharma
- Aurochem Lab
- AXA Parenterals
- A-Z Med Inc