United States Lime & Minerals (USLM) was incorporated in the mid-20th century, and over time developed into a specialized producer of lime and limestone products. Its organizational structure and operations evolved as the company acquired and integrated quarry and lime processing assets across multiple U.S. states. Headquartered in Dallas, Texas, it has built a reputation in the industrial materials sector through steady expansion of its production capacity and geographic reach.
USLM operates through two principal lines: Lime and Limestone (or “Lime & Limestone” operations). It extracts limestone from open-pit quarries and underground mines, and then processes it into products such as pulverized limestone (ground calcium carbonate), quicklime (calcium oxide), hydrated lime (calcium hydroxide), and lime slurry. Its products serve a wide variety of end markets: construction (road, building, soil stabilization), metals (especially steel), environmental (water treatment, flue gas desulfurization), industrial uses (glass, chemicals), oil & gas (drilling muds, site stabilization), agriculture (soil amendment, feed additives), and infrastructure applications. The company also holds interests in natural gas / oil royalties tied to land holdings, adding a minor energy-adjacent revenue component.
USLM is a high-quality, integrated supplier of lime and limestone materials with vertically integrated control from extraction through processing and distribution. Its geographic distribution of plants and quarries in states such as Arkansas, Colorado, Louisiana, Oklahoma, and Texas helps it serve regional markets efficiently and potentially buffer against localized demand swings. Because many of its customers require reliability, material consistency, and regulatory compliance (especially in environmental and construction sectors), USLM’s technical know-how and established infrastructure are key competitive assets. Its control over upstream limestone reserves gives it resilience against raw material supply pressures common in commodity industries.