Martin Marietta Aggregates is the nation’s second largest 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.  more... 

Martin Marietta Magnesia Specialties is among the largest U.S. producers of magnesia chemicals and lime. Magnesia Specialties leads the industry in research and development of highly specialized magnesia-based products. The Woodville, Ohio facility is the largest single site dolomitic lime plant in North America.  more... 

Martin Marietta Aggregates is uniquely qualified to provide the utilities industry with the high-calcium limestone required for flue gas desulfurization.  more... 

Martin Marietta Composites manufactures structural composites products used for transportation, construction and infrastructure. When high strength, low weight and durability are important, composites deliver the solution.  more...