Martin Marietta Materials, Inc. 10-K filed Feb 19, 2026

Modified · General

Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a leading natural resource-based building materials company. The Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 390400 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. In 20242025, aggregates gross profit accounted for 76generated 88% of the Company’s total reportable segment gross profit. As of December 31, 2025, Martin Marietta also provides cement and downstream productsother building materials, namely, cement, ready mixed concrete, asphalt and paving services, in targeted markets where the Company has a leadingnotable aggregates position. The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete, asphalt and paving operations are reported collectively as the “Building Materials business”. The Company also operates a Magnesia Specialties business with production facilities in Michigan and Ohio. The Magnesia Specialties business produces magnesia-based chemical products that are used in industrial, agricultural and environmental applications. It also produces dolomitic lime sold primarily to customers for steel production and soil stabilization. Magnesia Specialties’ products are shipped to customers domestically and worldwide.