Martin Marietta Materials Inc. reported its results for the first quarter ended March 31, 2014. Net sales increased 10 percent, resulting in gross margin expansion and improved profitability, according to the company. Aggregates product line volume was up 8 percent. Ward Nye, President and CEO of Martin Marietta Materials, stated: “Our first-quarter 2014 results reflect the continued economic momentum from 2013’s…
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