Companies based in Kassel

German transportation equipment company

K+S AG (formerly Kali und Salz GmbH) is a German chemical company headquartered in Kassel. The company is Europe’s largest supplier of potash for use in fertilizer. The firm also produces and distributes other mineral fertilizers, such as those from magnesium and sulfur. K+S is mainly active in Europe, North and South America with almost 15,000 employees worldwide (2020).

engineering company in Germany (1882–1999)

Raab-Katzenstein was a 1920s German aircraft manufacturer based in Kassel.