Martin Marietta Materials, Inc. filed an Amendment No. 1 to its August 24, 2026 Current Report on Form 8-K on November 4, 2026, providing updated unaudited pro forma financial information reflecting changes in preliminary purchase price accounting, financing, and expenses related to its acquisition of Lhoist North America, Inc.

Key Highlights

  • Amendment purpose: The filing updates pro forma financial information for the year ended December 31, 2025 and as of and for the six months ended June 30, 2026, to reflect changes in preliminary purchase price accounting, financing, and expenses for the LNA Transaction.
  • Acquisition closed: Martin Marietta consummated the acquisition of Lhoist North America, Inc. from LNA Holding SRL on August 21, 2026, pursuant to a Securities Sale Agreement dated June 27, 2026.
  • Seller entity: LNA Holding SRL is described in the filing as a société à responsabilité limitée organized under the laws of Belgium.
  • Pro forma statements included: Exhibit 99.1 contains an unaudited pro forma condensed combined balance sheet as of June 30, 2026, and unaudited pro forma condensed combined statements of earnings for the year ended December 31, 2025 and the six months ended June 30, 2026.
  • Scope limited: According to the filing, "This Amendment reports no other updates or amendments to the Original Report and should be read in conjunction with the Original Report."

Martin Marietta Updates Pro Forma Data Following LNA Acquisition Accounting Changes

Martin Marietta Materials, Inc. (NYSE:MLM), headquartered in Raleigh, North Carolina, filed this Form 8-K/A (Amendment No. 1) on November 4, 2026, to amend its August 24, 2026 Current Report on Form 8-K. According to the filing, the amendment was filed "solely to provide updated pro forma financial information" reflecting changes in preliminary purchase price accounting, financing, and expenses connected to the LNA Transaction.

The company disclosed that it completed the acquisition of Lhoist North America, Inc. on August 21, 2026, under a Securities Sale Agreement signed June 27, 2026, with seller LNA Holding SRL, a Belgian entity. An earlier Current Report filed August 10, 2026 had included historical financial information for LNA and initial pro forma data, which the August 24 filing incorporated by reference. The November amendment replaces that pro forma information with updated figures to account for preliminary purchase price accounting adjustments.

The updated unaudited pro forma condensed combined financial statements, filed as Exhibit 99.1, cover a combined balance sheet as of June 30, 2026, and combined statements of earnings for the full year ended December 31, 2025 and for the six months ended June 30, 2026. The filing was signed by George F. Schoen, Executive Vice President, General Counsel and Corporate Secretary of Martin Marietta Materials, Inc.

What Was Disclosed

Martin Marietta filed an amended 8-K on November 4, 2026, to supply revised unaudited pro forma financial statements for its acquisition of Lhoist North America, Inc., reflecting updated preliminary purchase price accounting. No other changes to the original August 24, 2026 report were reported.