Daniel G. Shephard

Martin Marietta Magnesia Specialties LLC produces magnesia chemicals and lime. It provides high purity magnesium oxide based products for environmental, industrial, nutritional and agricultural applications, and magnesium hydroxide products for use in everyday materials such as plastic, rubber, pulp & paper, ceramics, sugar, animal feed, aluminum, tile and motor oil. It is a wholly owned subsidiary of Martin Marietta Magnesia, Inc. The company is headquartered in Baltimore, MD.

Martin Marietta Aggregates produces construction aggregates. It supplies crushed stone, sand, gravel, asphalt and ready mix concrete products to contractors of highway and public infrastructure, residential and commercial projects. The company operates quarries and related facilities in the US, Canada and the Caribbean. Martin Marietta Aggregates is located in Raleigh, NC.