Martin Marietta Materials, Inc.

Martin Marietta Materials, Inc. is an American natural-resource-based building materials company that supplies aggregates — crushed stone, sand, and gravel — through a network of approximately 480 quarries, mines, and distribution yards across 28 states, Canada, and the Bahamas, generating $6.54 billion in total revenue in fiscal 2025. The company is the second-largest aggregates producer in the United States, and also manufactures magnesia-based specialty chemicals, ready mixed concrete, asphalt, and paving services, though a deliberate multiyear portfolio reshaping has progressively concentrated the enterprise around its core aggregates franchise, which generated 88% of total reportable segment gross profit in 2025.

This is a story about century-scale hard assets being rearranged in a decade. Over the past three years, Martin Marietta has divested its cement business through a tax-efficient asset exchange with QUIKRETE, sold downstream operations in Texas and California, and redeployed the proceeds into pure-play aggregates acquisitions — including the transformative $2.05 billion Blue Water Industries Southeast deal in 2024 and the QUIKRETE asset swap in February 2026 that brought in approximately 20 million tons of annual aggregates production across Virginia, Missouri, Kansas, and Vancouver. The result is a simpler, more durable earnings stream anchored by assets that are nearly impossible to replicate: the average quarry in the portfolio holds 85 years of reserves at current production rates, and permitting a new greenfield quarry in most of its markets is a decade-long proposition that frequently fails.

The file turns on a single question: whether the current infrastructure spending cycle — amplified by the $1.2 trillion Infrastructure Investment and Jobs Act, a wave of data-center and energy-infrastructure construction, and state-level ballot initiatives — is durable enough to keep aggregates pricing compounding ahead of cost inflation through whatever comes next for residential and nonresidential construction. At roughly 30 times trailing earnings from continuing operations and with the shares near $570, the market is pricing a good deal of that durability already.