RPM will host its 2026 annual meeting of stockholders virtually. The annual meeting will be held via webcast on Thursday, October 8, 2026.

Virtual Annual Meeting Details:

• WHEN: Thursday, October 8, 2026 at 1:30 p.m. ET

• WHO: Stockholders at the close of business on the record date of August 14, 2026

• WHERE: Via live internet webcast at www.virtualshareholdermeeting.com/RPM2026

• ACCESS: Your unique control number, provided on your proxy card, is required

• PARTICIPATION: Stockholders can vote and submit questions during live webcast

• REPLAY: Available until October 7, 2027, at www.virtualshareholdermeeting.com/RPM2026

• QUESTIONS?: Call Innisfree M&A Incorporated at (877) 687-1865 (toll free)