MLM: Other company developments

Item 8.01 Other Events Acquisition of Lhoist North America, Inc. As previously disclosed, on June 27, 2026, Martin Marietta Materials, Inc., a North Carolina corporation (the “Company”), entered into a Securities Sale Agreement (the “Securities Sale Agreement”) with LNA Holding SRL (“LNA Holding”), a société à responsabilité limitée organized under the laws of Belgium, pursuant to which the Company will acquire all of the outstanding equity interests in Lhoist North America, Inc. (“LNA”), a wholly-owned direct subsidiary of LNA Holding (such transaction, the “LNA Transaction”). Each party’s obligation to consummate the LNA Transaction is conditioned upon the satisfaction or waiver of customary closing conditions, including the receipt of certain regulatory approvals. On August 5, 2026, we announced that we have received all necessary regulatory approvals for the LNA Transaction. The LNA Transaction is expected to close in the third quarter of 2026. Financial Statements The following audited consolidated financial statements of LNA as of and for the years ended December 31, 2025 and 2024 and the related notes thereto are filed as Exhibit 99.1 to this Current Report on Form 8-K and are incorporated herein by reference: • Independent Auditor’s Report; • Consolidated Balance Sheets as of December 31, 2025 and 2024; • Consolidated Statements of Income for the Years Ended December 31, 2025 and 2024; • Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2025 and 2024; • Consolidated Statements of Equity for the Years Ended December 31, 2025 and 2024; • Consolidated Statements of Cash Flows for the Years Ended December 31, 2025 and 2024; and • Notes to Consolidated Financial Statements. Attached hereto as Exhibit 23.1 is the consent of Forvis Mazars