Martin Marietta Materials, Inc. is a natural resource-based building materials company focused on supplying essential construction materials across the United States. The company primarily provides aggregates such as crushed stone, sand, and gravel through an extensive network of quarries and distribution yards, serving infrastructure, nonresidential, and residential construction markets. These aggregates are also used in railroad ballast, as well as agricultural, utility, and environmental applications. Martin Marietta Materials operates through regional aggregates groups and complementary businesses in cement, asphalt, and ready-mixed concrete, integrating its materials into downstream products. Its cement business produces Portland and specialty cements, while its magnesia specialties segment manufactures magnesia-based chemical products and dolomitic lime for industrial, agricultural, environmental, and steel industry customers. Headquartered in Raleigh, North Carolina, Martin Marietta Materials plays a significant role in supporting large-scale construction and infrastructure activity in key U.S. markets.