Martin Marietta Aggregates is a leading producer of construction aggregates in the United States, supplying the crushed stone, sand and gravel used to build the roads, sidewalks and foundations on which we live. We are also a provider of asphalt and concrete in select geographic areas. We are the nation’s second largest producer of construction aggregates used primarily for construction of highways and other infrastructure projects, in certain green initiatives, including flue gas desulphurization, and in the domestic commercial and residential construction industries.