With a market cap of around $36 billion, Martin Marietta Materials, Inc. (MLM) is a leading natural resource–based building materials company supplying aggregates, cement, concrete, asphalt, and paving services to construction markets across the U.S. and internationally. It also produces magnesia-based chemical products and dolomitic lime used in industries such as steel manufacturing, agriculture, and environmental applications. Shares of the Raleigh, North Carolina-based company have underperformed the ...