Martin Marietta Materials, Inc. is a natural resource-based building materials company. The Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 390 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. It also provides cement and downstream products, namely, ready mixed concrete, asphalt and paving services in targeted markets. It conducts its Building Materials business through two segments, organized by geography: East Group and West Group. The East Group provides aggregates and asphalt products. The West Group provides aggregates, cement, downstream products and paving services. The Company’s Magnesia Specialties business provides a full range of magnesium oxide, magnesium hydroxide and dolomitic lime products. Its magnesia-based chemical products are used in industrial, agricultural and environmental applications. It also produces dolomitic lime sold to customers for steel production and soil stabilization.