Exhibit 99.1 MARTIN MARIETTA AND QUIKRETE TO EXCHANGE CERTAIN CEMENT AND CONCRETE ASSETS FOR AGGREGATES ASSETS COMPANY ALSO COMPLETES ACQUISITION OF PREMIER MAGNESIA, LLC PREVIEWS SECOND QUARTER 2025 EARNINGS AND RAISES FULL-YEAR GUIDANCE Raleigh, N.C. (August 4, 2025) – Martin Marietta Materials, Inc. (NYSE: MLM) (Martin Marietta or the Company), today announced that it has entered into a definitive agreement with Quikrete Holdings, Inc. (Quikrete) for the exchange of certain assets. Under the terms of the ...