UNITED STATES LIME & MINERALS INC

United States Lime & Minerals, Inc. (NASDAQ: USLM) operates as a manufacturer of lime and limestone products serving diverse industrial and construction markets across the United States. The company's principal website is www.uslm.com.

The company extracts high-quality limestone from open-pit quarries and underground mines, processing it into multiple product categories including crushed limestone, pulverized limestone (PLS), quicklime, hydrated lime, and lime slurry. These products serve construction markets including highway and building contractors, industrial customers such as paper and glass manufacturers, environmental applications including municipal water treatment and flue gas treatment, metals producers including steel manufacturers, roof shingle producers, agricultural customers, and oil and gas services companies.

United States Lime & Minerals operates through wholly owned subsidiaries managing eight mining properties across Arkansas, Colorado, Louisiana, Missouri, Oklahoma, and Texas. The company maintains five lime production plants, six lime slurry facilities, and three terminal facilities. The Texas Lime facility operates two preheater rotary kilns with approximately 500 thousand tons annual quicklime capacity, while the Arkansas Lime plant operates three kilns with 650 thousand ton capacity. Additional production occurs at St. Clair, Carthage, Mill Creek, and Colorado Lime facilities. The company also holds royalty and non-operated working interests in natural gas wells in the Barnett Shale Formation through its subsidiary U.S. Lime Company-O & G, LLC.

As of December 31, 2025, the company employed 346 persons, with 110 represented by unions under three collective bargaining agreements. The company maintains proven limestone mineral reserves of approximately 151.6 million tons and probable reserves of 71.5 million tons across its material properties, supporting decades of future production. Approximately 675 customers purchased lime and limestone products during 2025, with no single customer representing more than ten percent of sales. The company's utilization rate reached approximately eighty percent of total annual production capacity in 2025. Sales are concentrated within a 400-mile radius of production facilities, with all 2025 sales occurring within the United States. The company's business reflects seasonal patterns, with higher shipments and revenues typically occurring in the second and third quarters.