RPM: Leadership change

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Planned Retirement of Frank C. Sullivan, Chairman and Chief Executive Officer On November 6, 2026, Frank C. Sullivan, Chairman and Chief Executive Officer of RPM International Inc. (the Company”), formally announced his plan to retire in the next twelve to eighteen months after more than 40 years of dedicated service to the Company and nearly 25 years as the Company’s Chairman and Chief Executive Officer. Mr. Sullivan has intentionally provided such advanced notice of his planned retirement to facilitate the strategic and orderly transition of his duties and responsibilities to his successor in connection with an ongoing succession planning process initiated by and coordinated with the Company’s Board of Directors. Mr. Sullivan will serve in his current position and capacity with the Company until his successor is appointed and thereafter is expected to remain as Chair of the Company’s Board of Directors. 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 November 6, 2026 /s/ Tracy D. Crandall Tracy D. Crandall Vice President, General Counsel, Chief Compliance Officer and Secretary