RPM: Financial results

Item 2.02 Results of Operations and Financial Condition. On October 6, 2026, RPM International Inc. (the “Company”) issued a press release announcing its first quarter results, which provided detail not included in previously issued reports. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 . Financial information supplemental to the press release is furnished with this Current Report on Form 8-K as Exhibit 99.2 . Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit Number Description 99.1 Press Release of the Company, dated October 6, 2026, announcing the Company’s first quarter results. 99.2 Supplemental Financial Information 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE 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. RPM International Inc. (Registrant) Date October 6, 2026 /s/ Tracy D. Crandall Tracy D. Crandall Vice President, General Counsel, Chief Compliance Officer and Secretary