Martin Marietta Materials (NYSE: MLM) is a natural resource-based building materials company that quarries, produces, and sells aggregates and related construction materials across the United States. Revenue is transactional, generated by selling crushed stone, sand, and gravel to contractors, governments, and builders at per-ton prices. The company operates through two reportable segments: Building Materials and Magnesia Specialties. In FY2024, Martin Marietta completed the acquisition of 20 active aggregates operations from Blue Water Industries LLC affiliates in Alabama, South Carolina, South Florida, Tennessee, and Virginia for $2.05 billion, while simultaneously divesting its South Texas cement business and related ready mixed concrete operations to CRH Americas Materials for $2.1 billion in cash, realizing a pretax gain of $1.3 billion. The company also acquired Albert Frei & Sons, Inc. in January 2024, adding more than 60 years of hard rock reserves in the Denver metropolitan area. These moves reflect a deliberate portfolio shift toward aggregates-focused operations.

Revenue model

Transactional per-ton sales of aggregates (crushed stone, sand, gravel), supplemented by downstream products including cement, ready mixed concrete, asphalt, and magnesia-based specialty chemicals. Revenue is volume and price driven, tied to construction activity cycles.

Products and services

Crushed stone, sand, gravel, aggregates, cement (divested South Texas operations in FY2024), ready mixed concrete, asphalt, magnesia specialties (chemicals and industrial minerals).

Customers and end markets

Contractors, state and local governments, private builders. End markets include infrastructure, public construction, residential construction, and industrial applications (via Magnesia Specialties).

Value-chain role

Upstream raw material extractor and processor. Quarries and processes natural aggregates sold into construction supply chains. Occupies a regional near-monopoly position in many markets due to the weight-to-value economics of aggregates limiting practical shipping distances.

Geographic exposure

United States, with operations across multiple states including Colorado (Denver metro), Alabama, South Carolina, South Florida, Tennessee, Virginia, and historically Texas (cement operations divested FY2024). Primarily domestic.

Source: SEC 10-K, filed 2026-02-19

Industry: Mining & Quarrying of Nonmetallic Minerals (No Fuels) Peers: Eagle Materials Inc United States Lime & Minerals Inc Smith-Midland Corp Summit Materials, Inc. Vulcan Materials Co