International Minerals Carlsbad, LLC (IMC) announced today it has completed the acquisition of Mosaic Potash Carlsbad, Inc. from The Mosaic Company (NYSE: MOS).
The transaction includes the Carlsbad potash mine, associated water rights, and the Laguna Grande assets.
“The closing of this acquisition marks an important milestone for our company and for the future of potash production in New Mexico,” said Sergio Saenz, Chief Executive Officer of International Minerals Carlsbad. “We are proud to assume stewardship of this historic operation and are committed to building on its strong legacy while investing in its long-term growth and sustainability.”
International Minerals Carlsbad (IMC) will focus its operations on supplying langbeinite fertilizer to North American and global markets. Langbeinite, marketed as K-Mag®, is a pH-neutral, multi-nutrient fertilizer widely used on chloride-sensitive and high-value crops.
“K-Mag® has long been valued by growers for its consistent performance and balanced nutrient profile,” said Kelvin Feist, Commercial Management Consultant with IMC. “With this acquisition complete, we are focused on strengthening existing relationships with our long-standing customers, expanding market opportunities, and ensuring a reliable supply of this specialty fertilizer to growers around the world.”
IMC emphasized that maintaining stable operations, continuing a strong safety culture, and supporting the workforce will remain a top priority as the company begins its next chapter operating the Carlsbad mine.
“Our immediate focus is continuity — ensuring employees, customers, and vendors experience a smooth transition while positioning the operation for long-term success,” Saenz said. “This mine has been an important part of the Carlsbad community for generations, and we are committed to continuing that legacy.”
In addition to Saenz and Feist, the IMC team includes Don Purvis, Chief Operating Officer, and Vice President of Finance, John Tatum. In January, three industry veterans were added to the team. Peter Haugen will serve as Vice President of Operations and Engineering; Mark McDonald is Vice President of Sales; and Scott Carter is Director of Transportation and Distribution.
The acquisition comes at a time of growing national interest in domestic mineral production. In November 2025, the United States Geological Survey added potash to the federal government’s critical minerals list, highlighting its importance to agricultural productivity and supply chain security.
“New Mexico has been home to potash mining for more than a century,” Saenz said. “We see tremendous opportunity to continue developing this resource, supporting American agriculture, and investing in the people and communities that make this industry possible.”
More information about International Minerals Carlsbad, its products, and its people can be found at www.internationalmineralscarlsbad.com. This same information will also be available at www.kmag.com, which is currently in development and expected to launch in the coming months.
Contact: Kelvin Feist, International Minerals Carlsbad, LLC
kgf@elbowvalleyresourcesltd.com
303-319-9028