K+S AG operates as a holding company, which engages in the mining, and processing of mineral raw materials. It operates through the following segments: Potash and Magnesium, Salt, and Complementary Activities. The Potash and Magnesium segment manufactures and trades potash fertilizers and magnesium compounds. The Salt segment produces and markets food grade, industrial and de-icing salt, salt for chemical use, and sodium chloride brine. The Complementary Activities segment includes recycling, waste disposal, and reutilization operations in potash and rock salt mines. The company was founded in 1889 and is headquartered in Kassel, Germany.