MTX: Other company developments

Item 8.01 Other Events. On October 21, 2026, the Company’s Board of Directors declared a regular quarterly dividend of $0.13 per share on the Company's common stock. The dividend is payable on December 3, 2026, to the stockholders of record on November 5, 2026. A copy of the press release announcing the dividend declaration is attached hereto as Exhibit 99.1 and incorporated by reference herein. Item 9.01 Financial Statements and Exhibits. (d) Exhibits 99.1 Press Release dated October 21, 2026 104 Cover Page Interactive Data File (formatted as inline XBRL) 1 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MINERALS TECHNOLOGIES INC. (Registrant) By: /s/ Timothy J. Jordan Name: Timothy J. Jordan Title: Vice President, General Counsel, Secretary and Chief Compliance Officer Date: October 21, 2026