Compass Minerals
Compass Minerals is a United States-based minerals producer specializing in salt, magnesium chloride, sulfate of potash, and related mineral products.
Last updated August 25, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Compass Minerals is a publicly traded American minerals company headquartered in Overland Park, Kansas. Its operations center on the production, processing, and distribution of salt and specialty minerals for transportation, agriculture, consumer, water-conditioning, culinary, and industrial markets. The company operates through two principal business segments: Salt and Plant Nutrition. The Salt segment is the larger and more diversified of the two. It supplies bulk treated and untreated rock salt for highway deicing in North America and the United Kingdom, serving government transportation agencies, municipalities, counties, provinces, contractors, and other road-maintenance customers. Its deicing portfolio also includes magnesium chloride in flake and liquid forms, treated salt for lower-temperature conditions, and products used in dust control. Additional salt products are sold for consumer and professional deicing, water conditioning, culinary use, animal nutrition, swimming-pool treatment, and industrial applications. Some of these products combine sodium chloride with magnesium chloride, calcium chloride, or potassium chloride. Compass Minerals is described as the largest rock-salt producer in North America and the United Kingdom. Its underground mining network includes the Goderich mine in Ontario, Canada; the Cote Blanche mine in Louisiana; and the Winsford mine in Cheshire, England. Goderich is identified as the world’s largest salt mine, with an annual capacity of approximately 9 million tons. The Cote Blanche and Winsford operations have annual capacities of approximately 3.4 million and 1.5 million tons, respectively. The company also uses mechanical evaporation to produce high-purity fine- and coarse-grained salt at facilities in Lyons, Kansas; Unity, Saskatchewan; Goderich, Ontario; and Amherst, Nova Scotia. The company’s Plant Nutrition segment produces sulfate of potash, commonly abbreviated SOP, a specialty potassium fertilizer used by growers. Its principal production site is associated with the Great Salt Lake near Ogden, Utah. Brine is moved into shallow ponds, where solar evaporation concentrates minerals and enables the production of salt, sulfate of potash, and magnesium chloride. The Great Salt Lake SOP operation is described as the largest of its kind in North America and one of only three SOP brine solar-evaporation operations worldwide. The site has cited annual capacities of approximately 350,000 tons of SOP, 1.5 million tons of salt, and 750,000 tons of magnesium chloride. Compass Minerals has also explored expansion beyond its established mineral products. In 2022, it announced an intention to develop a lithium-extraction project at the Great Salt Lake site with potential annual production exceeding 11 kilotons of lithium carbonate equivalent. That project was subsequently put on hold in connection with regulatory changes. The company also divested the remainder of its plant-micronutrient assets to Koch Agronomic Services in 2021, sharpening its focus on salt and sulfate-of-potash activities. The company’s operating history draws on mineral businesses with roots extending back to the nineteenth century, but Compass Minerals became a public company through an initial public offering in December 2003. Its market position is concentrated in bulk mineral production and infrastructure-related supply rather than consumer-facing brand recognition. The business is especially exposed to winter weather, public-sector procurement, transportation conditions, mine availability, fertilizer demand, and the operating and regulatory environment around the Great Salt Lake.
History
Compass Minerals is a minerals producer whose operating history incorporates businesses and assets with roots extending back to the nineteenth century. The company’s modern public-company identity dates from its initial public offering in December 2003. Although the enterprise is best known for salt and specialty minerals, its portfolio has developed through a combination of mining, evaporation, processing, distribution, and selected portfolio transactions. The company’s core Salt business is built around deposits of rock salt and mineral brines. Underground mining is carried out with drill-and-blast and continuous-mining techniques. Compass Minerals operates the Goderich mine in Ontario, the Cote Blanche mine in Louisiana, and the Winsford mine in Cheshire, United Kingdom. Goderich is described as the largest salt mine in the world, with annual capacity of about 9 million tons. The Cote Blanche and Winsford mines have cited annual capacities of approximately 3.4 million and 1.5 million tons. Together, these operations support the company’s position as a leading rock-salt supplier in North America and the United Kingdom. Compass Minerals also produces salt through mechanical evaporation. Vacuum-based evaporation processes are used to make high-purity fine- and coarse-grained products for commercial, agricultural, and industrial customers. Facilities identified in the company’s operating network include Lyons, Kansas; Unity, Saskatchewan; Goderich, Ontario; and Amherst, Nova Scotia. These sites complement the underground mines by supplying refined salt grades for markets that require more controlled purity, particle size, or formulation. A second production method is solar evaporation. At the Great Salt Lake near Ogden, Utah, the company draws naturally occurring brine into shallow ponds and uses sunlight to concentrate the minerals. The operation produces salt, magnesium chloride, and sulfate of potash. Its sulfate-of-potash facility is described as the largest in North America and one of only three brine-based solar-evaporation SOP operations worldwide. The site gives Compass Minerals an important position in specialty fertilizer as well as in mineral products used for deicing and industrial purposes. The Salt segment supplies bulk treated and untreated products for highway ice control. Customers include public agencies and private road-maintenance contractors. The segment also sells magnesium chloride products for deicing and dust suppression, treated rock salt intended for very low temperatures, and salt used by the chlor-alkali industry. Consumer and industrial lines extend into water conditioning, culinary salt, animal nutrition, swimming-pool minerals, and other formulated applications. The Plant Nutrition segment has focused on sulfate of potash, a potassium fertilizer used by growers. Sales of domestic SOP have been concentrated in the western and southeastern United States, while exports have served markets in Latin America, Japan, Australia, and New Zealand. In 2021, Compass Minerals divested the last part of its plant-micronutrient assets to Koch Agronomic Services, narrowing the segment’s scope. In 2022, the company announced an initiative to extract lithium from Great Salt Lake brine, with a proposed capacity exceeding 11 kilotons per year measured as lithium carbonate equivalent. The initiative was subsequently placed on hold because of regulatory changes. This episode illustrated the company’s interest in extending its brine-processing capabilities while also highlighting the environmental and regulatory sensitivity of Great Salt Lake operations. Compass Minerals’ business model remains tied to essential mineral supply chains. Highway deicing demand is influenced by winter conditions and government purchasing cycles; fertilizer demand depends on crop economics and agricultural requirements; and production is affected by mine conditions, transportation, permitting, water and environmental considerations, and the availability of mineral resources. Its principal identity is therefore that of an infrastructure and industrial-materials supplier rather than a conventional consumer brand.
- 2022
Great Salt Lake lithium initiative
[1]The company announced a plan to develop lithium extraction at its Great Salt Lake site, with proposed annual capacity above 11 kilotons of lithium carbonate equivalent.
- 2021
Plant-micronutrient divestiture
[1]Compass Minerals agreed to sell its remaining plant-micronutrient assets to Koch Agronomic Services.
- 2012
Reported scale of operations
[1]The company reported total sales of $942 million for 2012 and was described as having a market capitalization of approximately $2.5 billion at year-end. These historical financial figures are included only for the stated year.
- 2010
Recognition among fast-growing companies
[1]Compass Minerals was included in Fortune’s 2010 listing of the 100 Fastest-Growing Companies.
- 2003
Initial public offering
[1]Compass Minerals became a public company through an initial public offering in December.
Products and positioning
A major North American and United Kingdom producer of salt and specialty minerals, with particular strength in highway deicing, magnesium chloride, and sulfate-of-potash plant nutrition.
Transportation deicing
Highway deicing salt
Compass Minerals supplies bulk untreated and treated rock salt to transportation authorities, municipalities, contractors, and other public-sector or commercial customers in North America and the United Kingdom. Treated products are formulated for improved performance in colder conditions, while other salt products are used for routine winter roadway ice control.
Deicing and dust control
Magnesium chloride
Magnesium chloride is produced in flake and liquid forms. It is used in highway and professional deicing, dust suppression, and selected industrial applications. The company obtains magnesium chloride through its Great Salt Lake mineral-brine operations and supplies it to transportation, commercial, and industrial customers.
Plant nutrition
Sulfate of potash
Sulfate of potash, or SOP, is a specialty potassium fertilizer intended for agricultural and horticultural use. Compass Minerals produces it through solar evaporation at the Great Salt Lake and sells into the United States and export markets including Latin America, Japan, Australia, and New Zealand.
Salt products
Consumer and industrial salt
The company’s refined and formulated salt products serve consumer and commercial deicing, water conditioning, culinary use, animal nutrition, swimming-pool treatment, and industrial applications. Product formulations may contain sodium chloride alone or blends involving magnesium chloride, calcium chloride, and potassium chloride.
Brand decisions
2022
Proposed Great Salt Lake lithium expansionStrategyBackground
Compass Minerals considered using its existing Great Salt Lake brine and evaporation infrastructure to enter the lithium supply chain.
Action taken
The company announced a proposed lithium-extraction project with potential annual production exceeding 11 kilotons of lithium carbonate equivalent.
Aftermath
The project was later put on hold following regulatory changes.
2021
Divestiture of plant-micronutrient assetsM&ABackground
Compass Minerals retained a plant-nutrition business centered on sulfate of potash while exiting its remaining plant-micronutrient assets.
Action taken
The company agreed to sell the remaining plant-micronutrient assets to Koch Agronomic Services.
Aftermath
The transaction narrowed the company’s plant-nutrition portfolio and reinforced its focus on salt and sulfate of potash.
Recent events
Koch Agronomic Services completes acquisition of Compass Minerals' North American micronutrient assets[2]
Reported:
Koch Agronomic Services completed its acquisition of Compass Minerals’ North American micronutrient assets, including global intellectual property rights and assets associated with the Wolf Trax, Rocket Seeds and Hydro Bullet product platforms.
Koch Agronomic Services agrees to acquire Compass Minerals micronutrient assets[3]
Reported:
Koch Agronomic Services reached an agreement to purchase Compass Minerals' North American micronutrient assets, including global intellectual property rights and assets associated with the Wolf Trax, Rocket Seeds and Hydro Bullet product platforms. The transaction was expected to close in April 2021, subject to customary closing conditions.
Sources3 sources
Cite this profile: Cite the canonical profile. /brand-wiki/compass-minerals · Editorial policy · How profiles are compiled