A member of the S&P 500 Index and a leading supplier of building materials, Martin Marietta employs more than 9,500 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 thrive and grow. Martin Marietta’s Magnesia Specialties business produces high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications. Every member of our ONE Martin Marietta team is driven by our shared values of Safety, Integrity, Excellence, Community and Stewardship. We provide exceptional customer service and strive to be good neighbors in the 500 communities in which we operate. Read more