Martin Marietta Materials, Inc.

Martin Marietta Materials, Inc. is a construction materials company headquartered in Raleigh, North Carolina. It was formed in 1993 when the construction materials unit of Martin Marietta Corporation was separated as an independent company. Its shares trade on the NYSE under the ticker MLM and the company is included in the S&P 500.

The company's core activity is producing aggregates such as crushed stone, sand and gravel. These materials are used to build roads, bridges, housing and commercial buildings. Beyond aggregates, it offers asphalt and paving services in some regions and magnesia-based specialty products for industrial use. In February 2026 the company handed its Midlothian cement plant, related cement terminals and Texas ready-mixed concrete assets to Quikrete Holdings and in return acquired aggregates operations in the United States and Canada.

This leaves operations more focused on aggregates. Because aggregate demand is tied to infrastructure spending and to residential and commercial construction, the results are read together with those indicators. Lzzo.com brings the US dollars price of MLM, a historical chart and technical indicators together on a single page.