Bayer AG (/ˈbeɪər/ or /ˈbaɪər/); German pronunciation: [ˈbaɪ̯ɐ]) is a German multinational chemical, pharmaceutical and life sciences company. It is headquartered in Leverkusen, where its illuminated sign is a landmark. Bayer's primary areas of business include human and veterinary pharmaceuticals; consumer healthcare products; agricultural chemicals and biotechnology products; and high value polymers. The company is a component of the Euro Stoxx 50 stock market index. The company's motto is "science for a better life."
Bayer's first and best known product was aspirin; there is a dispute about what scientist at Bayer made the most important contributions to it, Arthur Eichengrün or Felix Hoffmann.