{"filing":{"accession_number":"0000950157-26-000946","cik":"0000916076","ticker":"MLM","company_name":"MARTIN MARIETTA MATERIALS INC","form":"8-K","filing_date":"2026-08-24","report_date":"2026-08-21","primary_document":"form8-k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/916076/000095015726000946/form8-k.htm"},"events":[{"id":29049,"run_id":26581,"accession_number":"0000950157-26-000946","anchor_item_number":"2.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.97,"summary":"Martin Marietta completed its transformative acquisition of Lhoist North America on August 21, 2026, expanding its Specialties platform, adding over 2 billion tons of high-quality limestone reserves, and establishing the company as the nation's leading producer of limestone products.","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24","form":"8-K","submitted_at":null,"items":[{"id":31191,"accession_number":"0000950157-26-000946","item_number":"1.01","item_title":"Entry into","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Martin Marietta completed a material acquisition of Lhoist North America (LNA) on August 21, 2026, as announced in the press release. The Item 1.01 disclosure describes entry into definitive agreements (Shareholders Agreement and Registration Rights Agreement) that are ancillary to the combination closing. The transaction is explicitly characterized as \"transformative\" and \"advances our SOAR 2030 objectives by expanding our Specialties platform,\" establishing Martin Marietta as \"the nation's leading producer of limestone products.\" This is a completion of a material acquisition triggering M\u0026A activity classification.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"","ticker":null,"filing_date":""},{"id":31192,"accession_number":"0000950157-26-000946","item_number":"2.01","item_title":"Completion of Acquisition or Disposition","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.99,"reasoning":"Martin Marietta announced the completion of its combination with Lhoist North America (LNA) on August 21, 2026. The press release describes this as a \"transformative transaction\" that expands the Specialties platform, adds over 2 billion tons of high-quality limestone reserves, and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition that materially expands the company's asset base and strategic positioning.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"","ticker":null,"filing_date":""},{"id":31193,"accession_number":"0000950157-26-000946","item_number":"3.02","item_title":"Unregistered","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Martin Marietta announced completion of its combination with Lhoist North America (LNA) on August 21, 2026. The press release describes this as a \"transformative transaction\" that expands the Specialties platform, adds over 2 billion tons of limestone reserves, and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition/combination that materially affects the registrant's business scope and strategic position.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"","ticker":null,"filing_date":""},{"id":31195,"accession_number":"0000950157-26-000946","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.98,"reasoning":"Martin Marietta announced the completion of its combination with Lhoist North America, Inc. on August 21, 2026. The press release explicitly states this is a \"transformative transaction\" that \"expands our Specialties platform\" and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition/combination that would significantly affect investor assessment of the company's scale, portfolio, and strategic positioning.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"","ticker":null,"filing_date":""}]},{"id":29050,"run_id":26581,"accession_number":"0000950157-26-000946","anchor_item_number":"5.02","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.85,"summary":"Philipp Niemann, CEO of Lhoist S.A., was appointed as a director of Martin Marietta effective August 21, 2026, following the Board's increase in size from ten to eleven directors in connection with the Lhoist North America acquisition.","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24","form":"8-K","submitted_at":null,"items":[{"id":31194,"accession_number":"0000950157-26-000946","item_number":"5.02","item_title":"Departure of Directors or Certain","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses the appointment of Philipp Niemann as a director effective August 21, 2026, following the Board's increase in size from ten to eleven directors. While the appointment itself is the primary disclosed action in Item 5.02, the context reveals this is tied to the completion of Martin Marietta's acquisition of Lhoist North America (LNA), where Niemann serves as CEO of Lhoist S.A. (LNA's parent). The appointment is material as it reflects governance changes resulting from a transformative M\u0026A transaction, though the M\u0026A completion is separately disclosed in Item 1.01 and the press release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":31191,"accession_number":"0000950157-26-000946","item_number":"1.01","item_title":"Entry into","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Martin Marietta completed a material acquisition of Lhoist North America (LNA) on August 21, 2026, as announced in the press release. The Item 1.01 disclosure describes entry into definitive agreements (Shareholders Agreement and Registration Rights Agreement) that are ancillary to the combination closing. The transaction is explicitly characterized as \"transformative\" and \"advances our SOAR 2030 objectives by expanding our Specialties platform,\" establishing Martin Marietta as \"the nation's leading producer of limestone products.\" This is a completion of a material acquisition triggering M\u0026A activity classification.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24"},{"id":31192,"accession_number":"0000950157-26-000946","item_number":"2.01","item_title":"Completion of Acquisition or Disposition","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.99,"reasoning":"Martin Marietta announced the completion of its combination with Lhoist North America (LNA) on August 21, 2026. The press release describes this as a \"transformative transaction\" that expands the Specialties platform, adds over 2 billion tons of high-quality limestone reserves, and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition that materially expands the company's asset base and strategic positioning.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24"},{"id":31193,"accession_number":"0000950157-26-000946","item_number":"3.02","item_title":"Unregistered","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Martin Marietta announced completion of its combination with Lhoist North America (LNA) on August 21, 2026. The press release describes this as a \"transformative transaction\" that expands the Specialties platform, adds over 2 billion tons of limestone reserves, and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition/combination that materially affects the registrant's business scope and strategic position.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24"},{"id":31194,"accession_number":"0000950157-26-000946","item_number":"5.02","item_title":"Departure of Directors or Certain","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses the appointment of Philipp Niemann as a director effective August 21, 2026, following the Board's increase in size from ten to eleven directors. While the appointment itself is the primary disclosed action in Item 5.02, the context reveals this is tied to the completion of Martin Marietta's acquisition of Lhoist North America (LNA), where Niemann serves as CEO of Lhoist S.A. (LNA's parent). The appointment is material as it reflects governance changes resulting from a transformative M\u0026A transaction, though the M\u0026A completion is separately disclosed in Item 1.01 and the press release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24"},{"id":31195,"accession_number":"0000950157-26-000946","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.98,"reasoning":"Martin Marietta announced the completion of its combination with Lhoist North America, Inc. on August 21, 2026. The press release explicitly states this is a \"transformative transaction\" that \"expands our Specialties platform\" and establishes Martin Marietta as \"the nation's leading producer of limestone products.\" This is a material acquisition/combination that would significantly affect investor assessment of the company's scale, portfolio, and strategic positioning.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-24T11:34:46.804622+00:00","company_name":"MARTIN MARIETTA MATERIALS INC","ticker":"MLM","filing_date":"2026-08-24"}]}