MLM

Martin Marietta Materials Inc. is a natural‑resource‑based building‑materials company that mines, processes, and sells aggregates such as crushed stone, sand and gravel through a network of roughly 400 quarries, mines and distribution yards across the United States, Canada and the Bahamas. In addition to aggregates, the firm produces cement, ready‑mixed concrete, asphalt and offers paving services, while also operating a specialty chemicals segment that markets magnesia‑based products and dolomitic lime for industrial and environmental applications. The company operates within the construction and heavy‑building‑materials sector and is one of the largest U.S. producers of aggregates, holding leading market positions in many regional markets and leveraging localized supply‑chain advantages. Its business model combines vertical integration of raw material extraction with downstream processing and distribution, serving contractors, public‑sector infrastructure projects and residential developers.