Martin Marietta has agreed to acquire New Frontier Materials, a construction materials platform backed by private equity firm Declaration Partners. The deal marks another consolidation move in the aggregates and heavy building materials sector, expanding the Raleigh, North Carolina-based supplier's Midwest presence.

Declaration Partners acquired New Frontier in 2021 through a carve-out of the aggregates and asphalt assets from Fred Weber, Inc., a St. Louis-based construction company. Under Declaration's ownership, the Maryland Heights, Missouri-based platform assembled a new management team led by CEO Mike Clarke, a former executive at competitor Vulcan Materials.

The acquisition adds to Martin Marietta's growing network of aggregates operations across the United States. The deal reflects continued consolidation in the construction materials sector, where major suppliers are seeking scale and geographic expansion through strategic acquisitions.