USLM operates in two main segments: Lime and Limestone Operations, and Natural Gas Interests. The Lime and Limestone segment includes plants and facilities in Arkansas, Colorado, Louisiana, Oklahoma, and Texas, serving markets in the Central United States.

Smart Sand Inc. is headquartered in Yardley, Pennsylvania, and operates facilities in key locations to serve major oil and gas basins. The company specializes in the excavation, processing, and sale of high-quality sands or proppants used in hydraulic fracturing operations.

In the competitive landscape, CEMEX stands out due to its global reach and diverse product offerings. Major competitors include LafargeHolcim, HeidelbergCement, and CRH.