MLMMartin Marietta Materials

The Magnesia Specialties business manufactures magnesia-based chemicals products for industrial, agricultural and environmental applications at its Manistee, Michigan facility. The chemical products business focuses on higher-margin specialty chemicals that can be produced at volumes that support efficient operations. The Magnesia Specialties business also produces and sells dolomitic lime from its Woodville, Ohio facility. facility and manufactures high-purity natural and synthetic magnesia-based products for environmental, industrial, agricultural, construction, consumer and specialty applications at its Manistee, Michigan; Woodville, Ohio; Gabbs, Nevada; Waynesville, North Carolina; Greendale, Indiana; and Aspers, Pennsylvania facilities. These magnesia-based products have varying uses, including flame retardants, wastewater treatment, pulp and paper production and other specialty applications. Dolomitic lime products sold to external customers are primarily used by the domestic steel industry, industry as a fluxing agent, and in construction applications for soil stabilization, while the remaining lime shipments are used internally as a raw material for the manufacturing of chemical synthetic magnesia-based products. On July 25, 2025, the Company acquired Premier Magnesia, LLC (Premier), a privately-owned producer and distributor of magnesia-based products, using cash on hand and credit-facility borrowings. Premier is the largest producer of natural magnesite and magnesium sulfate, or Epsom salt, in the United States. This transaction expands the Company's product offerings to new and existing customers and enhances the Specialties business.

Our challenge is ability to find sustain and grow the business depends on replacing depleting reserves with quality aggregates deposits that we can mine economically, with appropriate permits, near either growing markets or long-haul transportation corridors that can economically serve applicable markets. As communities in many of our geographic Quality deposits that meet customer specifications are increasingly difficult to secure near growing markets have grown, they have settled in due to competing land uses, zoning and around attractive quarrying locations land-use restrictions, and have imposed restrictions on mining. community opposition. We try to meet this challenge by identifying and permitting sites prior to economic expansion, buying more land around our existing quarries to increase our mineral reserves, developing underground mines mines, and expanding a distribution network that transports aggregates products by various methods, including rail and water. While Even when deposits are identified, we may be unable to obtain or renew necessary land-use approvals, environmental permits, or other governmental authorizations on acceptable terms or timelines, or at all. If we are unable to timely replace reserves accessible to our distribution network allows us markets, obtain or maintain required permits and approvals, secure necessary property and access rights on acceptable terms, or economically transport materials to transport demand centers, our products longer distances than would normally ability to serve customers and our results of operations could be considered economical, we can give no assurances that we will continue to be successful at this strategy. adversely affected.