Martin Marietta Materials, Inc. Form 8-K Filing

On December 19, 2025, Martin Marietta Materials, Inc. entered into a Loan Modification No. 4 and Extension Agreement with JPMorgan Chase Bank, N.A. and other lenders to extend the maturity date of its $800,000,000 senior unsecured revolving credit facility to December 21, 2030. This amendment to the existing credit agreement was made in accordance with Section 9.07 of the Credit Agreement. The company has also provided information regarding the creation of a direct financial obligation under Item 2.03, which is incorporated by reference from Item 1.01. The filing includes exhibits such as the Loan Modification No. 4 and Extension Agreement and the conformed Credit Agreement.