Overview
Martin Marietta Materials is a natural-resource-based building materials company whose primary business is producing and supplying aggregates—crushed stone, sand and gravel. It also supplies cement, ready-mixed concrete and asphalt, and provides paving services in selected markets. Its Specialties business produces magnesia-based products and dolomitic lime.[1][2]
The company operates an aggregates network of approximately 400 sites across 28 U.S. states, Canada and The Bahamas. Its stated mission is to provide the foundation upon which communities improve and grow. Martin Marietta reported approximately $6.2 billion in revenue in 2025 and has a workforce of more than 9,500 people.[1][3][4][5] [1][2][4][3][5]
Products & services
Martin Marietta’s principal products are construction aggregates: crushed stone, sand and gravel manufactured to specified sizes, grades and chemical characteristics. They are used in roads, bridges and buildings, as well as railroad ballast, erosion control and other applications. The company ships aggregates by truck, rail and water.[6][7][8][9]
Its other building-material products include asphalt, made by combining aggregates with liquid asphalt for road and parking-lot surfaces, and paving services. Asphalt batches are produced to customer specifications. The company has also produced ready-mixed concrete batched for individual projects and delivered by mixer truck, along with Portland limestone and specialty cements; its Type 1L Portland limestone cement is approved by the Texas Department of Transportation. The cement and Texas ready-mixed-concrete assets were classified as discontinued operations pending divestiture at year-end 2025.[10][11][12][13]
The Specialties line includes magnesium sulfate, magnesium oxide, magnesium hydroxide and dolomitic lime. Applications include flame retardants, wastewater treatment, pulp and paper production, steelmaking flux and soil stabilization. In 2025, aggregates generated $5.0 billion in revenue and Specialties $441 million, approximately 81% and 7% of continuing-operations revenue, respectively; these product-line figures are stated before interproduct revenue eliminations.[14][15][16] [6][7][8][9][10][11][12][13][14][15][16][16][16][16]
Geographic presence
Martin Marietta Materials is headquartered in Raleigh, North Carolina. Its Building Materials operations are organized into two geographic groups. The East Group operates in Alabama, Florida, Georgia, Indiana, Iowa, Kansas, Kentucky, Maryland, Minnesota, Missouri, Nebraska, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, Nova Scotia and The Bahamas. The West Group operates in Arizona, Arkansas, California, Colorado, Louisiana, Oklahoma, Texas, Utah, Washington and Wyoming.[17][18]
In 2025, the East Group generated $3.19 billion, or about 56%, of Building Materials revenue; the West Group generated $2.52 billion, or about 44%. Texas, North Carolina, Colorado, California, Georgia, Florida, South Carolina, Arizona, Iowa and Minnesota together accounted for 76% of Building Materials revenue. Aggregates from the company’s Nova Scotia and Bahamas operations are shipped by sea to coastal ports. Its Magnesia Specialties business has production facilities in Manistee, Michigan, and Woodville, Ohio.[16][18][19][15] [17][18][16][16][16][19][15]
Business segments
Martin Marietta reports three segments: East Group, West Group and Specialties. East Group and West Group make up its Building Materials business. East Group supplies aggregates and asphalt, primarily across the eastern and central United States; West Group supplies aggregates, ready-mixed concrete, asphalt and paving services, primarily in western and southwestern states. Specialties produces magnesia-based products and dolomitic lime for industrial, environmental, agricultural and other uses.[2][18][20]
In 2025, East Group generated $3,194 million, or approximately 52% of reported segment revenue; West Group generated $2,515 million, or approximately 41%; and Specialties generated $441 million, or approximately 7%. Aggregates and other building materials are product categories within the geographic groups, not additional reportable segments.[21][15] [2][18][20][21][15]
Company history
Martin Marietta Materials traces its aggregates business to Superior Stone, which opened Red Hill Quarry near Charlottesville, Virginia, in 1939. Superior Stone merged with American-Marietta in 1959; American-Marietta then merged with the Glenn L. Martin Company in 1961 to form Martin Marietta Corporation. Martin Marietta Materials was incorporated in 1993 and began trading publicly in 1994. It became independent in 1996, when Lockheed Martin disposed of its controlling stake.[22][23]
Acquisitions shaped the company’s subsequent expansion. It acquired American Aggregates in 1997, then completed its acquisition of Texas Industries in 2014, adding substantial cement and ready-mixed concrete operations. The 2018 acquisition of Bluegrass Materials expanded its aggregates presence in the Southeast and Mid-Atlantic. In 2021, it acquired Lehigh Hanson’s West Region business, adding aggregates and cement operations in California and Arizona.[24][25][26][27] [22][23][24][25][26][27]
Sources
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