A member of the S&P 500 Index and a leading supplier of building materials, Martin Marietta employs more than 9,400 people across 28 states, Canada and the Bahamas. Our aggregates, cement, ready-mixed concrete and asphalt products are the foundational materials on which our communities grow. Martin Marietta’s Magnesia Specialties business produces high-purity magnesia and dolomitic lime products.
