Martin Marietta Materials

Martin Marietta Materials, Inc. (NYSE: MLM) is a natural resource-based building materials company supplying aggregates, including crushed stone, sand and gravel, alongside cement, ready mixed concrete, asphalt and paving services in selected markets. Its products serve commercial customers in construction, including infrastructure, nonresidential and residential projects, as well as agricultural, utility and environmental uses; aggregates also serve as railroad ballast. The Building Materials business is organized into the East Group, which supplies aggregates and asphalt, and the West Group, which supplies aggregates, ready mixed concrete, asphalt and paving services. A separate Specialties segment produces magnesia-based products, such as magnesium oxide, hydroxide and sulfate, and dolomitic lime for environmental, industrial, agricultural, construction, consumer and specialty applications, including steel production. In 2025, aggregates generated 88% of reportable segment gross profit, while magnesia-based products and lime accounted for 67% and 32% of Specialties revenue, respectively. The company operates approximately 400 quarries, mines and distribution yards across 28 states, Canada and The Bahamas. Formed in 1993 from the materials group of the organization now known as Lockheed Martin, it has expanded through acquisitions. Its website is www.martinmarietta.com.