Compass Minerals International, Inc. engages in the production of salt, sulfate of potassium, and magnesium chloride. It is also involved in the provision of records storage. It operates through the Salt and Plant Nutrition segments. The Salt segment provides highway de-icing salt. The Plant Nutrition segment produces and markets SOP products in various grades worldwide to distributors and retailers of crop inputs. The company was founded in 1844 and is headquartered in Overland Park, KS.