Moderna
AstraZeneca
Biogen
Regeneron Pharmaceuticals
Vertex Pharmaceuticals
Amgen
Gilead Sciences
Ionis Pharmaceuticals
Celgene
AbbVie
Merck & Co.
Dexcom
Pfizer
Bristol Myers Squibb
Shire (pharmaceutical company)
American company
alexion.com
Alexion Pharmaceuticals, a subsidiary of AstraZeneca, is a pharmaceutical company headquartered in Boston, Massachusetts that specializes in orphan drugs to treat rare diseases. Wikipedia